Hi.. Yes you are correct that the Launch timeout expiry gives the wake lock. In AlertDialogs the "screen becoming black" depends on the way you create it .. Please refer the topic "Opening a New Screen" from http://code.google.com/android/kb/commontasks.html . Make sure if you are using the third option of creating a dialog then the attribute android:theme="@android:style/Theme.Dialog" need to be added in the manifest xml of that activity using the dialog.
- Sundar -----Original Message----- From: android-developers@googlegroups.com [mailto:android-develop...@googlegroups.com] On Behalf Of Skooter Columbo Sent: Tuesday, December 30, 2008 2:47 PM To: Android Developers Subject: [android-developers] Screen Goes Black Between Activities, and Next Activity never shows up. >From my MainActivity the user can click a button that shows a dialog. >From this dialog the user can set the number of minutes and number of seconds from a custom Timer component, and click a start button. When they click start, this is the OnClickListener that gets invoked. public void onClick(DialogInterface dialog, int whichButton) { AlertDialog alertDialog = (AlertDialog)dialog; Timer timer = (Timer)alertDialog.getWindow().findViewById (R.id.timer); Intent intent = new Intent(MainActivity.this,CountDown.class); intent.putExtra(KEY_MINUTES, timer.getMinutes()); intent.putExtra(KEY_SECONDS, timer.getSeconds()); startActivity(intent); //startActivityForResult(intent, ACTIVITY_COUNT_DOWN); } As you can see it is sent to the CountDown activity. What is supposed to happen is the minutes and seconds that the user selected from the dialog are displayed on the CountDown screen, and they begin to count down and an explosion sound is played when zero is reached. What is really happening, For some reason the screen goes black, and nothing is displayed, however the explosion is played 30 seconds later if user selected 30 seconds. The CountDown Activity has two methods onCreate and onWindowFocusChanged. OnCreate is used to set up the view and onWindowFocusChanged is used to count down and update the view as each second pasts. I put the count down code in the onWindowFocusChanged because it there is no user intervention except to watch the time count down, and according to the android documentation this is the best indicator that the activity is visible to the user.http:// code.google.com/android/reference/android/app/ Activity.html#onWindowFocusChanged(boolean). See my code below. protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.count_down); //instantiate the components mMinutesText = (TextView)findViewById(R.id.count_down_minutes); mSecondsText = (TextView)findViewById(R.id.count_down_seconds); cancelButton = (Button)findViewById(R.id.count_down_cancel); Bundle extras = getIntent().getExtras(); mMinutes = extras.getInt(KEY_MINUTES); mMinutesText.setText(mMinutes); mSeconds = extras.getInt(KEY_SECONDS); mSecondsText.setText(mSeconds); cancelButton.setOnClickListener(new View.OnClickListener() { public void onClick(View view) { mIsCountingDown = false; setResult(RESULT_OK,new Intent()); finish(); } }); } @Override public void onWindowFocusChanged(boolean hasFocus){ super.onWindowFocusChanged(hasFocus); if(hasFocus){ countDown(mMinutes,mSeconds); if(mMinutes == 0 && mSeconds == 0){ MediaPlayer mp = MediaPlayer.create(this, mSound); mp.start(); } Intent mIntent = new Intent(); setResult(RESULT_OK,mIntent); finish(); } } Here are logs from LogCat. I am wondering if this "Launch timeout has expired, giving up wake lock!" is the problem. If this is the problem then what is causing it 12-30 02:40:31.926: INFO/ActivityManager(53): Displayed activity com.android.myapp/.CountDown: 14992 ms 12-30 02:41:40.408: INFO/ActivityManager(53): Starting activity: Intent { comp={com.android.myapp/com.android.myapp.CountDown} (has extras) } 12-30 02:41:50.454: WARN/ActivityManager(53): Launch timeout has expired, giving up wake lock! 12-30 02:41:50.549: WARN/ActivityManager(53): Activity idle timeout for HistoryRecord{43524f10 {com.android.myapp/ com.android.myapp.CountDown}} 12-30 02:42:00.166: INFO/ActivityManager(53): Displayed activity com.android.myapp/.CountDown: 19743 ms Any guidance someone can provide would be very helpful. Skooter :) --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
