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  • null pointer exception in textview of setcontent

    - by kitokid
    I am getting the java.lang.NullPointerException on createTabContent for the following code. There are two tabspecs. When I called and set the tab , changed the tabs for the first time it is ok. But when i called again while I am on the second tab, its hit the null pointer exception for line : NoStudentText.setVisibility(View.VISIBLE); I will show No Student Text if there is no data for the student list. It shows the text for the first time call. But If I do second time call to that tab, got the error. tspecStudent.setContent(new TabContentFactory() { public View createTabContent(String arg0) { if(listStudent != null && listStudent .size() > 0) { //show the student list } else { TextView noStudentText = (TextView)findViewById(R.id.NoStudentText); noStudentText.setVisibility(View.VISIBLE); return noStudentText; } } });

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  • Help identify the layout used here?

    - by Matt Huggins
    I'm working on a layout that comprises some of the same features seen in the screenshot below, but I'm running into a bit of confusion. Can someone help me understand a few points for the screenshot below? What is the root layout used here? How do I get the button bar to remain at the bottom, while the center section scrolls when it is long enough? Similar to the Ok/Cancel buttons seen here, how do I make them each 50% width (minus some margin and padding)?

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  • Sending data between activities within my app?

    - by user246114
    Hi, I have a TabActivity, and the tabs point to sub activities. Is there a way I can send a 'message' to those child activities? I just want to pass a string across, not sure if this is possible. I have some data being fetched by the parent TabActivity, and the child tabs can't do anything useful until the parent is done fetching. When fetching is complete, I'd like to pass that data to the child activities so they can do something useful with it. Notmally I'd set the data to be passed in the Intent when first creating the activity, but in this case I can't do that. Thanks

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  • ListAdapter --> How apply convert view changes to specific view item only?

    - by user1847544
    I am trying to get have the lower part of list view slide down, by hiding an unhiding linear layout in list_item. The problem is the view seems to get reused in LayoutAdapter so that the change does not just effect the view I intended to apply it to. Instead it shows up wherever the view is reused. How can I restrict the drop down to just the view on which I requested the dropdown? By drop down I mean unhide the linear layout.

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  • when would you use PendingIntent?

    - by Moshik
    Hi, I tried to understand from the api the porpese of PendingIntent, coz sometimes some method i use requires this, i still didnt get the idea right, anyone could exaplin? why cant i juse use context? thanks, moshik

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  • OpenGL ES perspective projection

    - by TimeManx
    I'm having a hard time understanding how glFrustum & gluPerspective work. I understand the concept of perspective projection but the functions aren't behaving how I expect them to. For example, if I set the frustum this way glFrustumf(0, 10, 0, 10, 1, 100) and have a rectangle at points 0, 0, 1, 0, 10, 1, 10, 10, 1, 10, 0, 1 then the rectangle is drawn with its left edge at -5 & right edge at 5, so the left half of the rectangle isn't visible. And if x is translated, I'd expect y to be too. But that doesn't happen either. In whatever examples I've seen, the coordinates for the projection matrix are taken as glFrustumf(-10, 10, -10, 10, 1, 100) but either way, whatever part is shown should be dependent on the rectangle's coordinates, right?

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  • How to stop calling the Activity again when device orientation is changed??

    - by user1460323
    My app uses Barcode Scanner. I want to launch the scanner when I open the app so I have it in the onCreate method. The problem is that if I have it like that, when I turn the device it calls again onCreate and calls another scanner. Also I have the first activity that calls the scanner. it has a menu so if he user presses back, it goes to that menu. If I turn the screen on that menu, it goes to barcode scanner again. To solve it I have a flag that indicates if it is the first time I call the scanner, if it's not I don't call it again. Now the problem is that if I go out of the app and go in again it doesn't go to the scanner, it goes to the menu, becasuse is not the first time I call it. Any ideas?? Is there a way to change the flag when I go out of my main activity or any other solution?? My code. private static boolean first = true; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); integrator = new IntentIntegrator(this); if (first) { first = false; integrator.initiateScan(); } }

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  • Pick an image from the Gallery

    - by Steve Jones
    I have seen a lot of posts about this, and it seems like the code below should work. I have created an SD Card image and added it to the emulator (and that works fine). Intent intent = new Intent(Intent.ACTION_PICK); intent.setType("image/*"); //intent.setAction(Intent.ACTION_GET_CONTENT); startActivityForResult(intent, 1); It does launch and allow selection of images, but when I click on an image, everything exits and the emulator returns to the home screen, not the back to my app. My onActivityResult is never called either. What am I missing?

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  • Problem with the size of the Twitter image

    - by Dayerman
    I have used this code to get a feed reader form twitter. I have list them in the listView as the article says, but with some images I have a problem with the size and they are anormally big...I have tried unsuccesfully to fix the size of the image with: <ImageView android:id="@+id/photoUser" android:layout_width="wrap_content" android:layout_height="wrap_content" android:maxWidth="10dp" android:maxHeight="10dp" android:paddingRight="12dp"/>

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  • Mapview on tablet: How can I center the map with an offset?

    - by Waza_Be
    Hint: Here is a similar post with HTML. In the current tablet implementation of my app, I have a fullscreen MapView with some informations displayed in a RelativeLayout on a left panel, like this: (My layout is quite trivial, and I guess there is no need to post it for readability) The problem comes when I want to center the map on a specific point... If I use this code: mapController.setCenter(point); I will of course get the point in the center of the screen and not in the center of the empty area. I have really no idea where I could start to turn the offset of the left panel into map coordinates... Thanks a lot for any help or suggestion

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  • onPerformSync() is not triggered after ContentResolver.requestSync() call

    - by mark
    I am trying to implement sync adaptor, I have followed This guide. But onPerformSync() is not triggered after ContentResolver.requestSync() call . I have also tried some other tutorials and tried to run their code, but still same issue. Please tell me does I need to do some extra configuration for this. My code of triggering sync operation is as folows : Account newAccount = new Account(GlobalInfo.ACCOUNT, GlobalInfo.ACCOUNT_TYPE); AccountManager accountManager = (AccountManager) this.getSystemService(ACCOUNT_SERVICE); accountManager.addAccountExplicitly(newAccount, null, null); ContentResolver.requestSync(newAccount,GlobalInfo.AUTHORITY, Bundle.EMPTY); Please guide me to solve this issue. EDIT : Accounted created (in Settings - Accounts and Sync settings) by above code showing sync is off

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  • Start all tab's activities for pre-cache

    - by Pentium10
    I have a TabActivity with three tabs defined. The first tab is light-weight and renders in acceptable time. But the 2nd and 3rd tab, does need a couple of seconds to get visually rendered, after I click them. I would like to launch them, after I've loaded my first tab, in background for pre-cache. Once they are loaded, I can switch quickly between them. So I am wondering how can I launch the 2nd and 3rd tab. They are intents loaded in the view area.

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  • How to make area outside of custom dialog view unclickable?

    - by portfoliobuilder
    I created a custom dialog (no, this is not dialog object) from an image and some other views. The conflict I am having with this custom dialog (again, this is a layout) is that the area around it closes the custom dialog. Is there a way I can make the outside area unclickable? I have tried wrapping the dialog view with a fullscreen frameLayout w/ transparent background, and then programmatically I set the frame attribute to setClickable(false). framelayout.setClickable(false); This does nothing. It still closes the dialog. Any other suggestions? Thank you in advance. This is my code: //used to disable background from closing the custom dialog private FrameLayout fl; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.layout_dialog); btnContinue = (Button) findViewById(R.id.btnContinue); btnContinue.setOnClickListener(this); fl.setClickable(false); //background suppose to lock } @Override public void onClick(View v) { // TODO Auto-generated method stub switch (v.getId()) { case R.id.Continue: finish(); } break; } } I also have another class for broadcastReceiver public class DialogManagerBroadcastReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { if(IdeaPlayInterfaceApplication.isActivityVisible()){ Intent i=new Intent(context,CustomDialogActivity.class); i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); context.startActivity(i); } } } The idea is that this custom dialog is not called at a specific instance, it is called every set amount of time no matter what I am doing in the application. I use an Intent and PendingIntent to repeatedly call this custom dialog over time. With something like this: cancelAlarmNotificationMonitoring(context); Calendar calendar = Calendar.getInstance(); Intent intent = new Intent(context, AlarmManagerBroadcastReceiver.class); PendingIntent pintent = PendingIntent.getBroadcast(context, 0, intent, 0); AlarmManager alarm = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE); alarm.setRepeating(AlarmManager.RTC_WAKEUP,calendar.getTimeInMillis()+ALARM_INTERVAL,ALARM_INTERVAL, pintent); Hopefully this is more clear now.

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  • How to check if Contact has Image?

    - by Pentium10
    I am assigning to an ImageView contacts images using this code: mPhotoView = (ImageView) findViewById(R.id.photo); mPhotoView.setImageURI(objItem.getPhotoUri()); If the contact has no image, this does nothing, and no error is raised. When there is no image, I want to add a default image. So I need to check either if the image was added to the view, or check that the URI holds some image data How do I achieve that? Than I will set default image by this: mPhotoView.setImageResource(R.drawable.ic_contact_picture_2);

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  • Getting screen height before first display?

    - by Mark
    Hi, I have a ListView. I populate it with 8 items, that's all that fits vertically on the G1. Some of my users are saying the Droid has a taller screen height, and so I can probably add one or two more items to the ListView to take up the additional space provided. How could I measure the available height the screen offers at startup, before the UI is displayed? If I see the height can fit more than 8 items, I'd like to add one or two more rows, Thanks

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  • Application widget with bundle?

    - by Varand pezeshk
    Hey guys, I have application widget, and I want to send some data to the intent that is attached to PendingIntent, by clicking the widget. here's my code final int N = appWidgetIds.length; for (int i = 0; i < N; i++) { int appWidgetId = appWidgetIds[i]; Intent intent = new Intent(context, UpComingBDays.class); if(bdaysAmount != 0){ Bundle bundle = new Bundle(); bundle.putIntegerArrayList("WIDGETIDS", tempAllIDS); intent.putExtras(bundle); System.out.println("bund insertedddddddddddddd....................."); } PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0); RemoteViews remoteView = new RemoteViews(context.getPackageName(), R.layout.widget_layout); remoteView.setTextViewText(R.id.widget_text, finalText4TextView); remoteView.setOnClickPendingIntent(R.id.WidgetImageButton, pendingIntent); appWidgetManager.updateAppWidget(appWidgetId, remoteView); } super.onUpdate(context, appWidgetManager, appWidgetIds); I realize always "bund insertedddddddddd......" is printed on CatLog, but the intent's bundle is null. what is incorrect? how can i send data by clicking on widget. plz dont offer to use services as my code does not have anything with it. many thanks.

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  • start intent without onCreate {}

    - by melvintcs
    i create a class extend Gallery and there is no onCreate, and i having a problem to run my intent. this is my sample code: this.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View v, int position, long id) { Intent intent = new Intent(v.getContext(), ClassName.class); startActivity(intent); }} i also tried below code to run, failed me also: Intent intent = new Intent(ThisClassName.this, ClassName.class); startActivity(intent); Please advice me what should i do :)

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  • Image Rescan issue

    - by user1296361
    I am working on a code that could scan the specific folder, when picture is taken, I used the following code: Intent intent = new Intent(); intent.setType("image/*"); //intent.setAction(Intent.ACTION_GET_CONTENT); sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://sdcard/ghost/" + Environment.getExternalStorageDirectory()))); startActivityForResult( Intent.createChooser(intent, "Select Picture"), 0); It works fine, but when I exit the app and start the app again, scan is not performed, what could be the issue? Help needed!!!

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