Application stops on back button in new activity
- by Bruno Almeida
I have this application, that have a listView, and when I click in a item on listView, it opens a new activity. That works fine!
But, if I open the new activity and than press the "back button" the application "Unfortunately, has stopped".
Is there something I'm doing wrong? Here is my code:
First activity:
public class AndroidSQLite extends Activity { private SQLiteAdapter
mySQLiteAdapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ListView listContent = (ListView)findViewById(R.id.contentlist);
mySQLiteAdapter = new SQLiteAdapter(this);
mySQLiteAdapter.openToRead();
Cursor cursor = mySQLiteAdapter.queueAll();
startManagingCursor(cursor);
String[] from = new String[]{SQLiteAdapter.KEY_NOME,SQLiteAdapter.KEY_ID};
int[] to = new int[]{R.id.text,R.id.id};
SimpleCursorAdapter cursorAdapter =
new SimpleCursorAdapter(this, R.layout.row, cursor, from, to);
listContent.setAdapter(cursorAdapter);
listContent.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
Toast.makeText(getBaseContext(), id + "", Toast.LENGTH_LONG).show();
Intent details = new Intent(getApplicationContext(),DetailsPassword.class);
startActivity(details);
}
});
mySQLiteAdapter.close();
} }
Second Activity:
public class DetailsPassword extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
TextView text = new TextView(getApplicationContext());
text.setText("Text to show");
setContentView(text);
} }
// ===== EDITED =====
here is the Stack Track
10-30 08:55:05.744: E/AndroidRuntime(28046): FATAL EXCEPTION: main
10-30 08:55:05.744: E/AndroidRuntime(28046):
java.lang.RuntimeException: Unable to resume activity
{com.example.sqliteexemple2/com.example.sqliteexemple2.AndroidSQLite}:
java.lang.IllegalStateException: trying to requery an already closed
cursor android.database.sqlite.SQLiteCursor@4180a370 10-30
08:55:05.744: E/AndroidRuntime(28046): at
android.app.ActivityThread.performResumeActivity(ActivityThread.java:2701)
10-30 08:55:05.744: E/AndroidRuntime(28046): at
android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2729)
10-30 08:55:05.744: E/AndroidRuntime(28046): at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1250)
10-30 08:55:05.744: E/AndroidRuntime(28046): at
android.os.Handler.dispatchMessage(Handler.java:99) 10-30
08:55:05.744: E/AndroidRuntime(28046): at
android.os.Looper.loop(Looper.java:137) 10-30 08:55:05.744:
E/AndroidRuntime(28046): at
android.app.ActivityThread.main(ActivityThread.java:4931) 10-30
08:55:05.744: E/AndroidRuntime(28046): at
java.lang.reflect.Method.invokeNative(Native Method) 10-30
08:55:05.744: E/AndroidRuntime(28046): at
java.lang.reflect.Method.invoke(Method.java:511) 10-30 08:55:05.744:
E/AndroidRuntime(28046): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
10-30 08:55:05.744: E/AndroidRuntime(28046): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:558) 10-30
08:55:05.744: E/AndroidRuntime(28046): at
dalvik.system.NativeStart.main(Native Method) 10-30 08:55:05.744:
E/AndroidRuntime(28046): Caused by: java.lang.IllegalStateException:
trying to requery an already closed cursor
android.database.sqlite.SQLiteCursor@4180a370 10-30 08:55:05.744:
E/AndroidRuntime(28046): at
android.app.Activity.performRestart(Activity.java:5051) 10-30
08:55:05.744: E/AndroidRuntime(28046): at
android.app.Activity.performResume(Activity.java:5074) 10-30
08:55:05.744: E/AndroidRuntime(28046): at
android.app.ActivityThread.performResumeActivity(ActivityThread.java:2691)
10-30 08:55:05.744: E/AndroidRuntime(28046): ... 10 more
