onPause() is the only method that is called always. From onPause() state Android OS can kill this app for many reasons bypassing onStop and onDestroy. I don’t think we can control this behavior of unexpected termination smoothly. Service can check for the state of the application periodically.
Actually there is no difference if you have only one activity. However, if you have several activities on the stack, then: finish() – finishes the activity where it is called from and you see the previous activity. System.exit(0) – restarts the app with one fewer activity on the stack. So, if you called ActivityB from … Read more
If you are doing a loading screen, just set the parameter to not keep it in activity stack. In your manifest.xml, where you define your activity do: <activity android:name=”.LoadingScreen” android:noHistory=”true” … /> And in your code there is no need to call .finish() anymore. Just do startActivity(i); There is also no need to keep a … Read more
I based my solution on guest’s above, as well as gilsaints88’s comments below (for Android L compatibility): Add this activity to your AndroidManifest.xml file: <activity android:name=”com.example.ExitActivity” android:theme=”@android:style/Theme.NoDisplay” android:autoRemoveFromRecents=”true”/> Then create a class ExitActivity.java: public class ExitActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); if(android.os.Build.VERSION.SDK_INT >= 21) { finishAndRemoveTask(); } else { finish(); … Read more
In Android 2.0+ this would look like: @Override public void onBackPressed() { new AlertDialog.Builder(this) .setIcon(android.R.drawable.ic_dialog_alert) .setTitle(“Closing Activity”) .setMessage(“Are you sure you want to close this activity?”) .setPositiveButton(“Yes”, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { finish(); } }) .setNegativeButton(“No”, null) .show(); } In earlier versions it would look like: @Override public boolean … Read more
Whenever you wish to exit all open activities, you should press a button which loads the first Activity that runs when your application starts then clear all the other activities, then have the last remaining activity finish. to do so apply the following code in ur project Intent intent = new Intent(getApplicationContext(), FirstActivity.class); intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); intent.putExtra(“EXIT”, … Read more
This is what is recommended as the right solution: The right solution (credits go to Dan, CommonsWare and NeTeInStEiN) Track visibility of your application by yourself using Activity.onPause, Activity.onResume methods. Store “visibility” status in some other class. Good choices are your own implementation of the Application or a Service (there are also a few variations … Read more