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• Where is /dev/dsp or /dev/audio?

  - by YumYumYum

  I have to apply sudo chmod a+r /dev/dsp or /dev/audio but in my Ubuntu 12.10 i do not have such. Where is then the PCM sound file for ssh? chmod: cannot access `/dev/dsp': No such file or directory chmod: cannot access `/dev/audio': No such file or directory Follow up: http://superuser.com/questions/244173/missing-dev-dsp-under-ubuntu I want to stream the sound output and input. So that i can capture any audio in/out to a file for recording.

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• storing data in a database using edit text and button

  - by user1841444

  Hai im trying to Insert data into database using EditText and Button i have created. Im stuck at Activity part of the Code.I unbale to proceed how to write the Onclick action part for Button and EditText part Please help me. Im new to android DBAdapter.java package com.example.database1; import android.content.ContentValues; import android.content.Context; import android.database.Cursor; import android.database.SQLException; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; import android.util.Log; public class DBAdapter { public static final String KEY_ROWID = "_id"; public static final String KEY_ISBN = "isbn"; public static final String KEY_TITLE = "title"; public static final String KEY_PUBLISHER = "publisher"; private static final String TAG = "DBAdapter"; private static final String DATABASE_NAME = "books"; private static final String DATABASE_TABLE = "titles"; private static final int DATABASE_VERSION = 1; private static final String DATABASE_CREATE = "create table titles (_id integer primary key autoincrement, " + "isbn text not null, title text not null, " + "publisher text not null);"; private final Context context; private DatabaseHelper DBHelper; private SQLiteDatabase db; public DBAdapter(Context ctx) { this.context = ctx; DBHelper = new DatabaseHelper(context); } private static class DatabaseHelper extends SQLiteOpenHelper { DatabaseHelper(Context context) { super(context, DATABASE_NAME, null, DATABASE_VERSION); } @Override public void onCreate(SQLiteDatabase db) { db.execSQL(DATABASE_CREATE); } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { Log.w(TAG, "Upgrading database from version " + oldVersion + " to " + newVersion + ", which will destroy all old data"); db.execSQL("DROP TABLE IF EXISTS titles"); onCreate(db); } } //---opens the database--- public DBAdapter open() throws SQLException { db = DBHelper.getWritableDatabase(); return this; } //---closes the database--- public void close() { DBHelper.close(); } //---insert a title into the database--- public long insertTitle(String isbn, String title, String publisher) { ContentValues initialValues = new ContentValues(); initialValues.put(KEY_ISBN, isbn); initialValues.put(KEY_TITLE, title); initialValues.put(KEY_PUBLISHER, publisher); return db.insert(DATABASE_TABLE, null, initialValues); } //---deletes a particular title--- public boolean deleteTitle(long rowId) { return db.delete(DATABASE_TABLE, KEY_ROWID + "=" + rowId, null) > 0; } //---retrieves all the titles--- public Cursor getAllTitles() { return db.query(DATABASE_TABLE, new String[] { KEY_ROWID, KEY_ISBN, KEY_TITLE, KEY_PUBLISHER}, null, null, null, null, null); } //---retrieves a particular title--- public Cursor getTitle(long rowId) throws SQLException { Cursor mCursor = db.query(true, DATABASE_TABLE, new String[] { KEY_ROWID, KEY_ISBN, KEY_TITLE, KEY_PUBLISHER }, KEY_ROWID + "=" + rowId, null, null, null, null, null); if (mCursor != null) { mCursor.moveToFirst(); } return mCursor; } //---updates a title--- public boolean updateTitle(long rowId, String isbn, String title, String publisher) { ContentValues args = new ContentValues(); args.put(KEY_ISBN, isbn); args.put(KEY_TITLE, title); args.put(KEY_PUBLISHER, publisher); return db.update(DATABASE_TABLE, args, KEY_ROWID + "=" + rowId, null) > 0; } } DatabaseActivity.java package com.example.database1; import android.os.Bundle; import android.app.Activity; import android.database.Cursor; import android.view.Menu; import android.widget.Toast; public class DatabaseActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_database); DBAdapter db=new DBAdapter(this); db.open(); } } activity_database.xml: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent"> <EditText android:id="@+id/edit1" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <EditText android:id="@+id/edit2" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <EditText android:id="@+id/edit3" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <Button android:id="@+id/submit" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout>

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• Layout does not show up after Activity launch

  - by Peter

  I have an activity which invokes an onItemClick and launches another activity. This activity has a static layout(for testing purposes), but only thing I see is black(I even set the text color to white to check it out). My listener list.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) { //create new intent Intent item = new Intent(getApplicationContext(), Item.class); // Close all views before launching logged //item.putExtra("name", ((TextView)arg1).getText()); //item.putExtra("uid", user_id); item.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivity(item); // Close Login Screen onPause(); } }); My activity is here(not much to do it just launches the layout) public class Item extends Activity{ protected SQLiteDatabase myDB=null; protected String name; protected int uid; TextView yeart,year,itemname,comment,commentt,value,valuet,curr,currt; protected void onStart(Bundle savedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.herp); /*name=getIntent().getStringExtra("name"); uid=Integer.parseInt(getIntent().getStringExtra("uid")); itemname=(TextView) findViewById(R.id.itemName);//itemname.setText(name); year=(TextView) findViewById(R.id.itemYear); yeart=(TextView) findViewById(R.id.year); comment=(TextView) findViewById(R.id.itemComments); commentt=(TextView) findViewById(R.id.comments); curr=(TextView) findViewById(R.id.itemcurrent); currt=(TextView) findViewById(R.id.current); value=(TextView) findViewById(R.id.itemValue); valuet=(TextView) findViewById(R.id.value);*/ Database openHelper = new Database(this); myDB = openHelper.getReadableDatabase(); myDB=SQLiteDatabase.openDatabase("data/data/com.example.login2/databases/aeglea", null, SQLiteDatabase.OPEN_READONLY); }} And finally my XML layout <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <TextView android:id="@+id/itemName" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="asdasd" android:gravity="center" android:layout_marginBottom="10px" android:textAppearance="?android:attr/textAppearanceLarge" android:textColor="#fff" /> <TextView android:id="@+id/current" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Current" android:textSize="20dp" android:textStyle="bold" /> <TextView android:id="@+id/itemcurrent" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="asdasd" /> <TextView android:id="@+id/year" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Year" android:textSize="20dp" android:textStyle="bold" /> <TextView android:id="@+id/itemYear" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="asdasd" /> <TextView android:id="@+id/value" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Value" android:textSize="20dp" android:textStyle="bold" /> <TextView android:id="@+id/itemValue" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="TextView" /> <TextView android:id="@+id/comments" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Comments" android:textSize="20dp" android:textStyle="bold" /> <TextView android:id="@+id/itemComments" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="TextView" /> </LinearLayout>

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• Andorid: the keyboard appeares when the app is started

  - by Briesanji

  I have coded an Android application composed by a LinearLayout(with an editbox and a button) and a ScrollView(with a LinearLayout that contains a TextView). When the app is started the keyboard pops up immediatly and I don't want this to happen. Have you got some advice?? THIS IS MY LAYOUT : <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.example.b2875.Messaggi$PlaceholderFragment" > <LinearLayout android:layout_width="fill_parent" android:layout_height="70dp" android:layout_marginTop="650dp" > <EditText android:id="@+id/ScriviMessaggio" android:layout_width="332dp" android:layout_height="71dp" android:ems="10" android:hint="@string/scriviMessaggio" /> <Button android:id="@+id/invia" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/invia" /> </LinearLayout> <ScrollView android:id="@+id/scrollView1" android:scrollbarAlwaysDrawVerticalTrack="true" android:layout_width="fill_parent" android:layout_height="600dp" android:focusable="true" android:focusableInTouchMode="true" > <LinearLayout android:id="@+id/linearVertical" android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="vertical" > <TextView android:id="@+id/AreaMessaggi" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/messaggi" /> </LinearLayout> </ScrollView> </RelativeLayout> MY MANIFEST IS THIS: <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.b2875" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="19" /> <uses-permission android:name="android.permission.INTERNET"/> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:windowSoftInputMode="stateHidden" android:name="com.example.b2875.Messaggi" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>

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• How to add more /dev/loop* devices on Fedora 19

  - by user219372

  How to add more /dev/loop* devices on Fedora 19? I do: # uname -r 3.11.2-201.fc19.x86_64 # lsmod |grep loop # ls /dev/loop* /dev/loop0 /dev/loop1 /dev/loop2 /dev/loop3 /dev/loop4 /dev/loop5 /dev/loop6 /dev/loop7 /dev/loop-control # modprobe loop max_loop=128 # ls /dev/loop* /dev/loop0 /dev/loop1 /dev/loop2 /dev/loop3 /dev/loop4 /dev/loop5 /dev/loop6 /dev/loop7 /dev/loop-control So nothing changes.

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• Media query from a specific folder

  - by sensei

  I would like to understand how I can use a cursor to jpg files in a folder specified in the sdcard. I'm trying to select with a cursor the jpg files in a specific folder, and I tried this: This is the code: public static Uri getRandomImage(ContentResolver resolver) { String[] projection = new String[] { BaseColumns._ID, }; String folder = "/sdcard/DCIM/Wallpaper/"; folder = folder + "%"; Uri uri = Media.EXTERNAL_CONTENT_URI; String[] whereArgs = new String[]{folder}; Cursor cursor = resolver.query(uri, projection, null, whereArgs, MediaColumns._ID); if (cursor == null || cursor.getCount() <= 0) { return null; } cursor.moveToPosition(new Random().nextInt(cursor.getCount())); return Uri.withAppendedPath(uri, cursor.getString(0)); } but this code gives me error here is the logcat: E/AndroidRuntime(11986): FATAL EXCEPTION: main E/AndroidRuntime(11986): android.database.sqlite.SQLiteException: bind or column index out of range: handle 0x26a490 E/AndroidRuntime(11986): at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:158) E/AndroidRuntime(11986): at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:114) E/AndroidRuntime(11986): at android.content.ContentProviderProxy.bulkQueryInternal(ContentProviderNative.java:330) E/AndroidRuntime(11986): at android.content.ContentProviderProxy.query(ContentProviderNative.java:366) E/AndroidRuntime(11986): at android.content.ContentResolver.query(ContentResolver.java:245) E/AndroidRuntime(11986): at it.bisemanuDEV.slidepuzzle.SelectImagePreference.getRandomImage(SelectImagePreference.java:126) E/AndroidRuntime(11986): at it.bisemanuDEV.slidepuzzle.TileView.newGame(TileView.java:156) E/AndroidRuntime(11986): at it.bisemanuDEV.slidepuzzle.SlidePuzzleActivity.onOptionsItemSelected(SlidePuzzleActivity.java:377) E/AndroidRuntime(11986): at android.app.Activity.onMenuItemSelected(Activity.java:2762) E/AndroidRuntime(11986): at com.android.internal.policy.impl.PhoneWindow.onMenuItemSelected(PhoneWindow.java:730) E/AndroidRuntime(11986): at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:143) E/AndroidRuntime(11986): at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:855) E/AndroidRuntime(11986): at com.android.internal.view.menu.IconMenuView.invokeItem(IconMenuView.java:532) E/AndroidRuntime(11986): at com.android.internal.view.menu.IconMenuItemView.performClick(IconMenuItemView.java:122) E/AndroidRuntime(11986): at android.view.View$PerformClick.run(View.java:8819) E/AndroidRuntime(11986): at android.os.Handler.handleCallback(Handler.java:603) E/AndroidRuntime(11986): at android.os.Handler.dispatchMessage(Handler.java:92) E/AndroidRuntime(11986): at android.os.Looper.loop(Looper.java:123) E/AndroidRuntime(11986): at android.app.ActivityThread.main(ActivityThread.java:4627) E/AndroidRuntime(11986): at java.lang.reflect.Method.invokeNative(Native Method) E/AndroidRuntime(11986): at java.lang.reflect.Method.invoke(Method.java:521) E/AndroidRuntime(11986): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) E/AndroidRuntime(11986): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) E/AndroidRuntime(11986): at dalvik.system.NativeStart.main(Native Method)

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• Android custom ListView unable to click on items

  - by MattC

  So I have a custom ListView object. The list items have two textviews stacked on top of each other, plus a horizontal progress bar that I want to remain hidden until I actually do something. To the far right is a checkbox that I only want to display when the user needs to download updates to their database(s). When I disable the checkbox by setting the visibility to Visibility.GONE, I am able to click on the list items. When the checkbox is visible, I am unable to click on anything in the list except the checkboxes. I've done some searching but haven't found anything relevant to my current situation. I found this question but I'm using an overridden ArrayAdapter since I'm using ArrayLists to contain the list of databases internally. Do I just need to get the LinearLayout view and add an onClickListener like Tom did? I'm not sure. Here's the listview row layout XML: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="?android:attr/listPreferredItemHeight" android:padding="6dip"> <LinearLayout android:orientation="vertical" android:layout_width="0dip" android:layout_weight="1" android:layout_height="fill_parent"> <TextView android:id="@+id/UpdateNameText" android:layout_width="wrap_content" android:layout_height="0dip" android:layout_weight="1" android:textSize="18sp" android:gravity="center_vertical" /> <TextView android:layout_width="fill_parent" android:layout_height="0dip" android:layout_weight="1" android:id="@+id/UpdateStatusText" android:singleLine="true" android:ellipsize="marquee" /> <ProgressBar android:id="@+id/UpdateProgress" android:layout_width="fill_parent" android:layout_height="wrap_content" android:indeterminateOnly="false" android:progressDrawable="@android:drawable/progress_horizontal" android:indeterminateDrawable="@android:drawable/progress_indeterminate_horizontal" android:minHeight="10dip" android:maxHeight="10dip" /> </LinearLayout> <CheckBox android:text="" android:id="@+id/UpdateCheckBox" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout> And here's the class that extends the ListActivity. Obviously it's still in development so forgive the things that are missing or might be left laying around: import java.util.List; import android.app.ListActivity; import android.content.Context; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.CheckBox; import android.widget.ListView; import android.widget.ProgressBar; import android.widget.TextView; import com.xxxx.android.R; import com.xxxx.android.DAO.AccountManager; import com.xxxx.android.model.UpdateItem; public class UpdateActivity extends ListActivity { AccountManager lookupDb; boolean allSelected; UpdateListAdapter list; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); lookupDb = new AccountManager(this); lookupDb.loadUpdates(); setContentView(R.layout.update); allSelected = false; list = new UpdateListAdapter(this, R.layout.update_row, lookupDb.getUpdateItems()); setListAdapter(list);

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• UI android question/problem with Listview

  - by user309554

  Hi, I'm trying to recreate the UI screen called 'My Places' that is used in the Weather Channel app. I'd attach a screenshot of the screen, but I can't seem to do it here. It seems they're using two listviews one on top of the other, but I'm not sure for certain. Could anybody confirm this for me? If they are doing this, how is this done? I've tried to implement this, but without full success. My top listview 'Add a place' 'comes up correctly, but the bottom listview will not appear/populate for me? I shall attach my code so far...... Any help would be greatly appreciated. Thanks Simon header_row.xml ?xml version="1.0" encoding="utf-8"? LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="wrap_content" ImageView android:id="@+id/icon" android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_marginRight="6dip" android:src="@drawable/ic_menu_add" / LinearLayout android:orientation="vertical" android:layout_width="0dip" android:layout_weight="1" android:layout_height="fill_parent" TextView android:id="@+id/caption" android:layout_width="fill_parent" android:layout_height="0dip" android:layout_weight="1" android:gravity="center_vertical" android:text="Add a place"/ /LinearLayout /LinearLayout main.xml ?xml version="1.0" encoding="utf-8"? LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="?android:attr/listPreferredItemHeight" android:padding="6dip" ListView android:id="@+id/header" android:layout_width="wrap_content" android:layout_height="wrap_content"/ LinearLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content" ListView android:id="@+id/list" android:layout_width="fill_parent" android:layout_height="wrap_content"/ /LinearLayout /LinearLayout public class ListViewTest extends Activity { private static String[] items={"lorem", "ipsum", "dolor", "sit", "amet", "consectetuer", "adipiscing", "elit", "morbi", "vel", "ligula", "vitae", "arcu", "aliquet", "mollis", "etiam", "vel", "erat", "placerat", "ante", "porttitor", "sodales", "pellentesque", "augue", "purus"}; private ListView Header; private ListView List; private ArrayList caption = null; private CaptionAdapter adapter; private ArrayAdapter listAdapter; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); caption = new ArrayList(); Caption cap = new Caption(); cap.setCaption("Add a place"); caption.add(cap); this.adapter = new CaptionAdapter(this, R.layout.header_row, caption); Header = (ListView) findViewById(R.id.header); Header.setAdapter(adapter); //Log.d("ListViewTest", "caption size is:" + caption.size()); adapter.notifyDataSetChanged(); List = (ListView) findViewById(R.id.list); listAdapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, items); List.setAdapter(listAdapter); listAdapter.notifyDataSetChanged(); //setListAdapter(new ArrayAdapter(this, //android.R.layout.simple_list_item_1, //items)); } private class CaptionAdapter extends ArrayAdapter { private ArrayList caption; public CaptionAdapter(Context context, int textViewResourceId, ArrayList caption) { super(context, textViewResourceId, caption); this.caption = caption; } @Override public View getView(int position, View convertView, ViewGroup parent) { View v = convertView; if (v == null) { LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE); v = vi.inflate(R.layout.header_row, null); } Caption c = caption.get(position); if (c != null) { TextView caption = (TextView) v.findViewById(R.id.caption); if (caption != null) { caption.setText(c.getCaption()); } } return v; } } }

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• 2 fundamental questions for the Androgurus ...Can someone guide me

  - by Saul Carpenter

  I have'nt plunged into Android Development as yet though Java Classes C++ all that is not new to me. Here are the questions folks. Appreciated any help on these : - If I need to develop test and deploy Android Apps do I NEED AN ANDROID Hardware device or is there a software Android Simulator like VMWARE or Virtual PC , where I can emulate the results.If there is such can you point me more info I have a Netbook ( the Chinese Ipad Clone ) running Android that has only Wi-Fi for the present. Is it possible to add the following features via the spare USB Port --- a USB Based 56K Modem : Are there Android platform H/W Drivers. --- a USB based RJ45 ( Ethernet LAN LandLine connection ) Adapter :Are there Android platform H/W Drivers. Please advise Thanks Saul

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• html textfield in WebView in an Android application is hidden by the soft keyboard

  - by user280503

  Hello, I have an Android application that is a TabHost with a WebView. I use it to load a specific html file that has a text field in its bottom part. When I touch the html textfield, the soft keyboard pops up, and hides the textfield, so that I cannot see what I have typed. Here is the layout: <?xml version="1.0" encoding="utf-8"?> <TabHost xmlns:android="http://schemas.android.com/apk/res/android" android:id="@android:id/tabhost" android:layout_width="fill_parent" android:layout_height="fill_parent"> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/main" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <TabWidget android:focusableInTouchMode="false" android:id="@android:id/tabs" android:layout_width="fill_parent" android:layout_height="63dp" /> <FrameLayout android:id="@android:id/tabcontent" android:layout_width="fill_parent" android:layout_height="fill_parent"> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/layout" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <WebView android:id="@+id/webview" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1" /> </LinearLayout> </FrameLayout> </LinearLayout> </TabHost> I have tried to configure the AndroidManifest.xml file with android:windowSoftInputMode="adjustResize" with no success. I have also tried replacing the FrameLayout in my layout with ScollView, but that caused my webview to increase in size indefinitely when the application is running.. this may be due to some javascript I have running on the page. I have noticed that the android's web browser has a nifty behaviour - in a web page, after the soft keyboard pops up, the web page scrolls smoothly so that the focusable textfield is visible to the user. How can I have this kind of behavior in my applicaiton?

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• Android fragments problems different layouts

  - by juan

  I have two layouts: one for portait with one container and another for landscape with two containers. In the first layout I show a fragment and when the user select one element, I replace the fragment with another (with FragmentTransation.Replace). <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" > <LinearLayout android:id="@+id/container1" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" /> </RelativeLayout> In the second layout I want to show the two fragments at one time, one in the first container and the second in the second container. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal" > <LinearLayout android:id="@+id/container1" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="3" android:orientation="vertical" /> <LinearLayout android:id="@+id/container2" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="7" android:orientation="vertical" /> </LinearLayout> But I can't make this works with configuration changes. I try use different names for containers, try add fragments when only bundle is null,... Someone have a working code of this case?

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• android.view.InflateException: Binary XML file line #11

  - by kostas

  i have a listview with some items.when the user touch the first list item it starts a dialog activity with a photo and some text below.that happens for every list item.but unfortunately i m getting this android.view.InflateException: Binary XML file line #11 force down error..this is a part of my manifest: <activity android:name=".kalamaki" android:label="Beaches in Chania" android:screenOrientation="portrait" android:configChanges="orientation|keyboardHidden" android:theme="@android:style/Theme.Dialog" /> this is my .xml file: <?xml version="1.0" encoding="utf-8"?> <ScrollView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#cfcfcc" > <LinearLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <ImageView android:layout_marginTop="5px" android:id="@+id/image" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@+id/image" /> <TextView android:layout_marginTop="5px" android:id="@+id/text" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@+id/text" android:textColor="#262626" /> </LinearLayout> </ScrollView> and this is my logcat error: 04-30 19:08:34.433: ERROR/AndroidRuntime(405): Uncaught handler: thread main exiting due to uncaught exception 04-30 19:08:34.463: ERROR/AndroidRuntime(405): java.lang.RuntimeException: Unable to start activity ComponentInfo{kostas.menu.chania/kostas.menu.chania.sfinari}: android.view.InflateException: Binary XML file line #11: Error inflating class <unknown> 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2454) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2470) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.app.ActivityThread.access$2200(ActivityThread.java:119) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1821) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.os.Handler.dispatchMessage(Handler.java:99) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.os.Looper.loop(Looper.java:123) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.app.ActivityThread.main(ActivityThread.java:4310) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at java.lang.reflect.Method.invokeNative(Native Method) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at java.lang.reflect.Method.invoke(Method.java:521) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at dalvik.system.NativeStart.main(Native Method) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): Caused by: android.view.InflateException: Binary XML file line #11: Error inflating class <unknown> 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.view.LayoutInflater.createView(LayoutInflater.java:513) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:563) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.view.LayoutInflater.rInflate(LayoutInflater.java:618) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.view.LayoutInflater.rInflate(LayoutInflater.java:621) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.view.LayoutInflater.inflate(LayoutInflater.java:407) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.view.LayoutInflater.inflate(LayoutInflater.java:320) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.view.LayoutInflater.inflate(LayoutInflater.java:276) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:198) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.app.Activity.setContentView(Activity.java:1622) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at kostas.menu.chania.sfinari.onCreate(sfinari.java:15) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2417) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): ... 11 more 04-30 19:08:34.463: ERROR/AndroidRuntime(405): Caused by: java.lang.reflect.InvocationTargetException 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.widget.ImageView.<init>(ImageView.java:105) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at java.lang.reflect.Constructor.constructNative(Native Method) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at java.lang.reflect.Constructor.newInstance(Constructor.java:446) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.view.LayoutInflater.createView(LayoutInflater.java:500) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): ... 23 more 04-30 19:08:34.463: ERROR/AndroidRuntime(405): Caused by: android.content.res.Resources$NotFoundException: File res/drawable-mdpi/scrollbar_handle_vertical.9.png from drawable resource ID #0x7f050000 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.content.res.Resources.loadDrawable(Resources.java:1710) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.content.res.TypedArray.getDrawable(TypedArray.java:548) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.widget.ImageView.<init>(ImageView.java:115) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): ... 27 more 04-30 19:08:34.463: ERROR/AndroidRuntime(405): Caused by: java.io.FileNotFoundException: res/drawable-mdpi/scrollbar_handle_vertical.9.png 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.content.res.AssetManager.openNonAssetNative(Native Method) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.content.res.AssetManager.openNonAsset(AssetManager.java:391) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): at android.content.res.Resources.loadDrawable(Resources.java:1702) 04-30 19:08:34.463: ERROR/AndroidRuntime(405): ... 29 more

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• android layout images bad quality

  - by user1028269

  when I add images on layout it show in bad quality <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <ImageView android:id="@+id/imageView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/sbackground" /> how to fix it? (I need to fix it only without programmatically) thanks

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• PagerView overlapping PagerTabStrip / PagerTitleStrip

  - by user1256169

  I've been trying for about a week to get my PagerView not to overlap the TitleStrip. I've tried absolutely everything I can think of, and one StackOverflow question that looked like the same question, had an answer that wasn't applicable. It appears that both the PagerTitleStrip and the TextView start at 0,0 (left,top) Any help would be appreciated. Note that I can't use any XML (inc Layout.xml) so it's all done programatically. Here's a full working example of my problem: package com.example.projname; import android.app.Activity; import android.os.Bundle; import android.support.v4.view.PagerAdapter; import android.support.v4.view.PagerTabStrip; import android.support.v4.view.ViewPager; import android.view.Gravity; import android.view.View; import android.view.ViewGroup; import android.view.ViewGroup.LayoutParams; import android.widget.TextView; public class MainActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); MyPagerAdapter myPagerAdapter = new MyPagerAdapter(); PagerTabStrip myPagerTabStrip = new PagerTabStrip(this); myPagerTabStrip.setGravity(Gravity.TOP); ViewPager viewPager = new ViewPager(this); viewPager.addView(myPagerTabStrip, LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT); viewPager.setAdapter(myPagerAdapter); setContentView(viewPager); } class MyPagerAdapter extends PagerAdapter { public final String[] Titles = { "Title One", "Title Two", "Title Three", "Title Four", "Title Five" }; @Override public int getCount() { return Titles.length; } @Override public boolean isViewFromObject(View view, Object object) { return (view == object); } @Override public CharSequence getPageTitle(int position) { return Titles[position]; } @Override public Object instantiateItem(ViewGroup container, int position) { TextView textView = new TextView(getApplicationContext()); String myString = new String("Page " + (position + 1) + "\r\n"); textView.setText(myString + myString + myString + myString + myString + myString); container.addView(textView); return textView; } @Override public void destroyItem(ViewGroup container, int position, Object object) { container.removeView((View) object); } } } Edit: Adding a screenshot of the problem:

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• handling various frame layouts in android

  - by vaibhav

  i'm new to game development and am trying create a Contra or the old tmnt game (but a simple one) like game for android. for the game i decided to divide my main screen in three parts - upper for stats,mid for the game and lower for controls. my main.xml is <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <FrameLayout android:id="@+id/upper_bar" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1" > </FrameLayout> <FrameLayout android:id="@+id/fl" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="0.5" > </FrameLayout> <FrameLayout android:id="@+id/low_bar" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="0.85" > </FrameLayout> </LinearLayout> so i have created the gameview and gameloopthread classes for the mid surface(which is pretty standard). my problem is that how do i draw in the upper and lower frame layouts? should i make new classes for view and thread for each layout , should i do all this in the gameview class itself or is there any better way to implement this?

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• imageview weights in linearlayout

  - by Metalex

  I have this layout: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center_vertical" android:orientation="horizontal" android:minWidth="100dp" > <TextView android:id="@+id/txt_what_way" android:layout_height="wrap_content" android:layout_width="0dp" android:layout_weight="4" android:textAppearance="?android:attr/textAppearanceMedium" /> <LinearLayout android:layout_height="wrap_content" android:layout_width="0dp" android:layout_weight="3"> <ImageView android:layout_width="20dp" android:layout_height="20dp" android:scaleType="fitCenter" android:src="@drawable/ic_launcher"/> </LinearLayout> <LinearLayout android:layout_height="wrap_content" android:layout_width="0dp" android:layout_weight="3"> <ImageView android:layout_width="20dp" android:layout_height="20dp" android:scaleType="fitCenter" android:src="@drawable/ic_launcher"/> </LinearLayout> </LinearLayout> I want that it looks like: TextView - 40% of width, Layout with ImageView - 30% of widht, Layout with ImageView - 30% of width. But the output is: TextViewImageViewImageView----------------free space---------------------------------- Thanks for your help! -- EDITED Done it in programmatic way

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• Why is 1px sometimes 2px when specified in Android XML?

  - by Daniel Lew

  I've got a desire for a one-pixel divider line, just for looks. I thought I could accomplish this using a View of height 1px, with a defined background. However, I'm getting some very odd behavior on different devices - sometimes the 1px ends up as 2px. Take this sample layout for example: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <View android:layout_width="fill_parent" android:layout_height="1px" android:background="@android:color/white" android:layout_marginBottom="4dp" /> <View android:layout_width="fill_parent" android:layout_height="1px" android:background="@android:color/white" android:layout_marginBottom="4dp" /> <View android:layout_width="fill_parent" android:layout_height="1px" android:background="@android:color/white" android:layout_marginBottom="4dp" /> <View android:layout_width="fill_parent" android:layout_height="1px" android:background="@android:color/white" android:layout_marginBottom="4dp" /> <View android:layout_width="fill_parent" android:layout_height="1px" android:background="@android:color/white" android:layout_marginBottom="4dp" /> <View android:layout_width="fill_parent" android:layout_height="1px" android:background="@android:color/white" android:layout_marginBottom="4dp" /> <View android:layout_width="fill_parent" android:layout_height="1px" android:background="@android:color/white" android:layout_marginBottom="4dp" /> </LinearLayout> When run on my G1, this comes out fine. But on the Nexus One, it alternates between 1px lines and 2px lines. Does anyone know where this is going awry? Why does Android sometimes make 1px into 2px?

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• What is wrong with this layout? Android

  - by kellogs

  Hi, I am trying to accomplish a view like this: left side = live camera preview, right side = a column of 4 images. But all that I managed with the following xml was a fullscreen live camera preview. Android 1.5 emulator. Thanks <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent"> <proto.wiinkme.SurfaceViewEx android:id="@+id/preview" android:layout_height="fill_parent" android:layout_width="wrap_content" android:layout_alignParentLeft="true" android:layout_weight="3"/> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_toRightOf="@+id/preview" android:layout_alignParentRight="true" android:layout_weight="1"> <ImageView android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/mother_earth" android:src="@drawable/mother_earth_show" /> <ImageView android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/meadow" android:src="@drawable/meadow_show" /> <ImageView android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/trap" android:src="@drawable/trap_show" /> <ImageView android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/whistle" android:src="@drawable/whistle_show" /> </LinearLayout> </RelativeLayout>

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• Android custom xml widget

  - by DrogoNevets

  I have an XML file in my layout folder that has how i want my custom widget/view (not sure what correct terminology is here). but how do i make it so that i can programatically, add one or more to an activity the xml file is as follows <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content" android:id="@+id/viewLog"> <TextView android:id="@+id/viewLogClimbName" android:layout_width="fill_parent" android:singleLine="true" android:ellipsize="end" android:gravity="left" /> <LinearLayout android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="1"> <LinearLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content"> <TextView android:id="@+id/viewLogDate" android:layout_width="fill_parent" android:singleLine="true" android:ellipsize="end" android:gravity="left" /> <TextView android:id="@+id/viewLogStyle" android:layout_width="fill_parent" android:singleLine="true" android:ellipsize="end" android:gravity="left" /> </LinearLayout> <TextView android:id="@+id/viewLogDetails" android:layout_width="fill_parent" android:layout_height="fill_parent" android:ellipsize="end" android:gravity="left" android:layout_weight="1" /> </LinearLayout> </LinearLayout> I have looked at the android how-to and dont really understand what its getting at

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• [android] How to center buttons on screen horizontally and vertically plus equidistant apart?

  - by marc

  I've been racking my brain (android newbie here, so not hard to do) for awhile trying to figure out how to accomplish this: Desired Layout using a RelativeLayout or something other than AbsoluteLayout which is what this was created with. I'm coming from a Windows programming background where the device adjusts the 'absolute' positioning for you and GUI layout was a non-issue. The first layout works great in the emulator, but doesn't format for my Nexus One or any other screen that differs from the emulator size. I expected this because it's absolutely positioned, but haven't found a solution that will format correctly for different screen sizes. My goal is to have the layout work for different screen sizes and in portrait / landscape. Here's the Code that I'm currently using: [main.xml] <?xml version="1.0" encoding="utf-8"?> <AbsoluteLayout android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android" > <Button android:id="@+id/Button01" android:layout_width="188px" android:layout_height="100px" android:text="A" android:layout_y="50px" android:layout_x="65px" android:textSize="48sp"/> <Button android:id="@+id/Button02" android:layout_width="188px" android:layout_height="100px" android:text="B" android:layout_y="175px" android:layout_x="65px" android:textSize="48sp"/> <Button android:id="@+id/Button03" android:layout_width="188px" android:layout_height="100px" android:text="C" android:layout_y="300px" android:layout_x="65px" android:textSize="48sp"/> </AbsoluteLayout> Using tidbits from other questions here, I came up with this, it’s closer, but not there yet. <?xml version="1.0" encoding="utf-8"?> <TableLayout android:gravity="center" android:id="@+id/widget49" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" xmlns:android="http://schemas.android.com/apk/res/android" > <Button android:id="@+id/Button01" android:layout_width="0dip" android:layout_weight="1" android:text="A" android:textSize="48sp"/> <Button android:id="@+id/Button02" android:layout_width="0dip" android:layout_weight="1" android:text="B" android:textSize="48sp"/> <Button android:id="@+id/Button03" android:layout_width="0dip" android:layout_weight="1" android:text="C" android:textSize="48sp"/> </TableLayout> Here’s a picture of the TableLayout: Another Attempt Any help / guidance would be greatly appreciated.

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• Specifying Android project dependencies (in Eclipse)

  - by Henrik Gustafsson

  I have two Android projects, a 'library project' containing a custom layout, and an 'application project' containing an application which uses the layout. Everything seems to build and execute fine, except that the visual layout editor throws a ClassNotFoundException (which I assume is a bug in the plug-in), but when I try to start to make use of the attributes I defined for the custom layout in the xml, I can no longer build. That is; this works: <?xml version="1.0" encoding="utf-8"?> <se.fnord.android.layout.PredicateLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="asdfasdf" /> </se.fnord.android.layout.PredicateLayout> Whereas this does not: <?xml version="1.0" encoding="utf-8"?> <se.fnord.android.layout.PredicateLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:fnord="http://schemas.android.com/apk/res/se.fnord.android" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TextView fnord:layout_horizontalSpacing="1px" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="asdfasdf" /> </se.fnord.android.layout.PredicateLayout> The build fails with a message from aapt: ERROR No resource identifier found for attribute 'layout_horizontalSpacing' in package 'se.fnord.android' The resource identifier does exist in the R-file and attrs.xml contained the library project, and if I put the layout code and resources directly in the application project everything works fine. The layout_horizontalSpacing attribute (and layout_verticalSpacing) is a custom attribute used in the PredicateLayout.LayoutParam class to specify the distance to the next widget. So far I've tried the standard eclipse ways by specifying project references and build path project dependencies. I was also told to try the tag in the application manifest, which did not help. So, what do I need to do for the references in the xml-file to work? I don't know if it's relevant, but the 'library' manifest looks like this: <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="se.fnord.android" android:versionCode="1" android:versionName="1.0.0"> </manifest> The 'application' manifest like this: <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="se.fnord.appname" android:versionCode="1" android:versionName="1.0.0"> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".AppName" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest> (The 'PredicateLayout', btw, is a cleaned-up version of this).

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• custom listview adapter getView method being called multiple times, and in no coherent order

  - by edzillion

  I have a custom list adapter: class ResultsListAdapter extends ArrayAdapter<RecordItem> { in the overridden 'getView' method I do a print to check what position is and whether it is a convertView or not: @Override public View getView(int position, View convertView, ViewGroup parent) { System.out.println("getView " + position + " " + convertView); The output of this (when the list is first displayed, no user input as yet) 04-11 16:24:05.860: INFO/System.out(681): getView 0 null 04-11 16:24:29.020: INFO/System.out(681): getView 1 android.widget.RelativeLayout@43d415d8 04-11 16:25:48.070: INFO/System.out(681): getView 2 android.widget.RelativeLayout@43d415d8 04-11 16:25:49.110: INFO/System.out(681): getView 3 android.widget.RelativeLayout@43d415d8 04-11 16:25:49.710: INFO/System.out(681): getView 0 android.widget.RelativeLayout@43d415d8 04-11 16:25:50.251: INFO/System.out(681): getView 1 null 04-11 16:26:01.300: INFO/System.out(681): getView 2 null 04-11 16:26:02.020: INFO/System.out(681): getView 3 null 04-11 16:28:28.091: INFO/System.out(681): getView 0 null 04-11 16:37:46.180: INFO/System.out(681): getView 1 android.widget.RelativeLayout@43cff8f0 04-11 16:37:47.091: INFO/System.out(681): getView 2 android.widget.RelativeLayout@43cff8f0 04-11 16:37:47.730: INFO/System.out(681): getView 3 android.widget.RelativeLayout@43cff8f0 AFAIK, though I couldn't find it stated explicitly, getView() is only called for visible rows. Since my app starts with four visible rows at least the position numbers cycling from 0-3 makes sense. But the rest is a mess: Why is getview called for each row four times? Where are these convertViews coming from when I haven't scrolled yet? I did a bit of reseach, and without getting a good answer, I did notice that people were associating this issue with layout issues. So in case, here's the layout that contains the list: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_height="fill_parent" android:layout_width="fill_parent" android:orientation="vertical" > <TextView android:id="@+id/pageDetails" android:layout_width="fill_parent" android:layout_height="wrap_content" /> <ListView android:id="@+id/list" android:layout_width="fill_parent" android:layout_height="wrap_content" android:drawSelectorOnTop="false" /> </LinearLayout> and the layout of each individual row: <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="108dp" android:padding="4dp"> <ImageView android:id="@+id/thumb" android:layout_width="120dp" android:layout_height="fill_parent" android:layout_alignParentTop="true" android:layout_alignParentBottom="true" android:layout_alignParentLeft="true" android:layout_marginRight="8dp" android:src="@drawable/loading" /> <TextView android:id="@+id/price" android:layout_width="wrap_content" android:layout_height="18dp" android:layout_toRightOf="@id/thumb" android:layout_alignParentBottom="true" android:singleLine="true" /> <TextView android:id="@+id/date" android:layout_width="wrap_content" android:layout_height="18dp" android:layout_alignParentBottom="true" android:layout_alignParentRight="true" android:paddingRight="4dp" android:singleLine="true" /> <TextView android:id="@+id/title" android:layout_width="fill_parent" android:layout_height="wrap_content" android:textSize="17dp" android:layout_toRightOf="@id/thumb" android:layout_alignParentRight="true" android:layout_alignParentTop="true" android:paddingRight="4dp" android:layout_alignWithParentIfMissing="true" android:gravity="center" /> Thank you for your time

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• My android app crash before load main.xml

  - by Saverio Puccia

  my android app crash before load main.xml. This is the exception thrown java.lang.RuntimeException: Unable to resume activity...: java.lang.NullPointerException What happens? For completeness I enclose my manifest.xml <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="saverio.puccia.nfcauth" android:versionCode="1" android:versionName="1.0" > //permission <uses-sdk android:minSdkVersion="10" /> <uses-permission android:name="android.permission.NFC"></uses-permission> <uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission> //main declaration <application android:icon="@drawable/ic_launcher" android:label="@string/app_name" > <activity android:name=".NFCAuthActivity" android:label="@string/app_name" > //intent filter declaration <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> <intent-filter> <action android:name="android.intent.action.NDEF_DISCOVER" /> <category android:name="android.intent.category.DEFAULT" /> </intent-filter> </activity> </application> </manifest> LOGCAT 06-25 11:03:23.670: E/AndroidRuntime(4323): FATAL EXCEPTION: main 06-25 11:03:23.670: E/AndroidRuntime(4323): java.lang.RuntimeException: Unable to resume activity {saverio.puccia.nfcauth/saverio.puccia.nfcauth.NFCAuthActivity}: java.lang.NullPointerException 06-25 11:03:23.670: E/AndroidRuntime(4323): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2456) 06-25 11:03:23.670: E/AndroidRuntime(4323): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2484) 06-25 11:03:23.670: E/AndroidRuntime(4323): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1998) 06-25 11:03:23.670: E/AndroidRuntime(4323): at android.app.ActivityThread.access$600(ActivityThread.java:127) 06-25 11:03:23.670: E/AndroidRuntime(4323): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1159) 06-25 11:03:23.670: E/AndroidRuntime(4323): at android.os.Handler.dispatchMessage(Handler.java:99) 06-25 11:03:23.670: E/AndroidRuntime(4323): at android.os.Looper.loop(Looper.java:137) 06-25 11:03:23.670: E/AndroidRuntime(4323): at android.app.ActivityThread.main(ActivityThread.java:4507) 06-25 11:03:23.670: E/AndroidRuntime(4323): at java.lang.reflect.Method.invokeNative(Native Method) 06-25 11:03:23.670: E/AndroidRuntime(4323): at java.lang.reflect.Method.invoke(Method.java:511) 06-25 11:03:23.670: E/AndroidRuntime(4323): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790) 06-25 11:03:23.670: E/AndroidRuntime(4323): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557) 06-25 11:03:23.670: E/AndroidRuntime(4323): at dalvik.system.NativeStart.main(Native Method) 06-25 11:03:23.670: E/AndroidRuntime(4323): Caused by: java.lang.NullPointerException 06-25 11:03:23.670: E/AndroidRuntime(4323): at saverio.puccia.nfcauth.NFCAuthActivity.onResume(NFCAuthActivity.java:103) 06-25 11:03:23.670: E/AndroidRuntime(4323): at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1157) 06-25 11:03:23.670: E/AndroidRuntime(4323): at android.app.Activity.performResume(Activity.java:4539) 06-25 11:03:23.670: E/AndroidRuntime(4323): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2446) 06-25 11:03:23.670: E/AndroidRuntime(4323): ... 12 more 06-25 11:03:23.670: W/ActivityManager(1998): Force finishing activity r.intent.getComponent().flattenToShortString()

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• Android ActivityGroup

  - by Vahag Vardanyan

  I know that ActivityGroup is in the "past", but I want to learn how to use it. So I write a simple TabHost, and want to show different activities using ActivityGroup. Here are the parts of code Player.java package player.org; import android.app.Activity; import android.app.TabActivity; import android.content.Context; import android.content.Intent; import android.content.res.Resources; import android.media.MediaPlayer; import android.os.Bundle; import android.util.Log; import android.view.MotionEvent; import android.view.View; import android.view.View.OnClickListener; import android.view.animation.AlphaAnimation; import android.view.animation.Animation; import android.view.animation.AnimationUtils; import android.widget.Button; import android.widget.ProgressBar; import android.widget.SeekBar; import android.widget.SeekBar.OnSeekBarChangeListener; import android.widget.TabHost; import android.widget.TabWidget; import android.widget.TextView; public class Player extends TabActivity { /** Called when the activity is first created. */ private MediaPlayer media=null; private SeekBar progress; private View play; private Progress p; TabHost tabhost; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.tabs); Resources res=getResources(); //TabHost tabhost=(TabHost) findViewById(R.id.tabhost); // tabhost.setup(); tabhost=getTabHost(); TabHost.TabSpec spec; Intent intent; intent=new Intent(this,Progress.class); spec=tabhost.newTabSpec("now playing").setIndicator("Now playing", res.getDrawable(R.drawable.icon)) .setContent(intent); tabhost.addTab(spec); intent=new Intent(this,Group.class); spec=tabhost.newTabSpec("all_songs").setIndicator("All songs", res.getDrawable(R.drawable.songs)) .setContent(intent); tabhost.addTab(spec); //intent=new Intent(this,Progress.class); spec=tabhost.newTabSpec("artists").setIndicator("Artists", res.getDrawable(R.drawable.icon)) .setContent(intent); tabhost.addTab(spec); spec=tabhost.newTabSpec("alboom").setIndicator("Alboom", res.getDrawable(R.drawable.icon)) .setContent(intent); tabhost.addTab(spec); tabhost.setCurrentTab(0); } } Group.java import android.os.Bundle; import android.view.View; public class Group extends ActivityGroup { @Override public void onCreate(Bundle savedInstanceStated) { super.onCreate(savedInstanceStated); View view = getLocalActivityManager().startActivity("AllSongs", new Intent(this, AllSongs.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)).getDecorView(); setContentView(view); } AllSongs.java package player.org; import java.util.ArrayList; import android.R.id; import android.app.ActivityGroup; import android.app.ListActivity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.view.Window; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ArrayAdapter; import android.widget.ListView; import android.widget.TabHost; public class AllSongs extends ListActivity{ ArrayList<String> listItem=new ArrayList<String>(); ArrayAdapter<String> adapter; ListView listView; //Player p; TabHost tab; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //p=new Player(); adapter=new ArrayAdapter<String>(this,R.layout.list_item,listItem); setListAdapter(adapter); listView=getListView(); listView.setTextFilterEnabled(true); listView.setOnItemClickListener(listener); addItem("vahag"); addItem("vahagvahag"); } private OnItemClickListener listener=new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { // TODO Auto-generated method stub Intent intent = new Intent(AllSongs.this,Progress.class); intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); Group group= (Group) getParent(); View view=group.getLocalActivityManager().startActivity("Progress",intent).getDecorView(); setContentView(view); } }; public void addItem(String s) { listItem.add(s); adapter.notifyDataSetChanged(); } } and the Progress.java package player.org; import android.app.Activity; import android.app.ActivityGroup; import android.app.Dialog; import android.app.TabActivity; import android.content.Context; public class Progress extends Activity { // Called when the activity is first created. public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); } } So, AllSongs.java try to change current activity with Progress activity, but when I press on list item, the Programm forsed closed, and logChat says "08-17 12:49:26.471: ERROR/AndroidRuntime(1500): java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'" I can't figure how to fix this problem, Can anyone helps?

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• android: which view should I use for showing text and image?

  - by Yang

  My app shows a list of items, where each line is an item title with its image asides, the line reserves 70% of space for text and 30% for image. Imagine what iphone app store looks like. Which view/layout combo is recommended for this purpose? I googled and find this article: http://www.curious-creature.org/2009/02/22/android-layout-tricks-1/ Does this view sound good? <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="?android:attr/listPreferredItemHeight" android:padding="6dip"> <ImageView android:id="@+id/icon" android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_alignParentTop="true" android:layout_alignParentBottom="true" android:layout_marginRight="6dip" android:src="@drawable/icon" /> <TextView android:id="@+id/secondLine" android:layout_width="fill_parent" android:layout_height="26dip" android:layout_toRightOf="@id/icon" android:layout_alignParentBottom="true" android:layout_alignParentRight="true" android:singleLine="true" android:ellipsize="marquee" android:text="Simple application that shows how to use RelativeLayout" /> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_toRightOf="@id/icon" android:layout_alignParentRight="true" android:layout_alignParentTop="true" android:layout_above="@id/secondLine" android:layout_alignWithParentIfMissing="true" android:gravity="center_vertical" android:text="My Application" />

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