I have a problem with two of the buttons in a launcher app I'm developing. The first button should launch TotalCommander's built-in text editor to display a certain text file. The second button should launch TotalCommander. So I started with the code below...
ImageButton button1 = (ImageButton) findViewById(R.id.imageButton1);
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse("file:///storage/emulated/0/myNotes.txt"), "text/plain");
startActivity(intent);
}
});
ImageButton button2 = (ImageButton) findViewById(R.id.imageButton2);
button2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent= getPackageManager().getLaunchIntentForPackage("com.ghisler.android.TotalCommander");
startActivity(intent);
}
});
...but it worked in an unexpected way:
- The first button opens the text-editor as expected.
- Then pressing the home button shows the launcher as expected.
- Then the second button opens TotalCommander as expected.
- Now pressing the back button shows the text-editor, instead of showing the launcher.
...so to be more specific: I want the buttons to use separate tasks, so that navigating back from either the text-editor or TotalCommander shows the launcher. (Except when the text-editor was opened from TotalCommander, in which case a new instance of the text-editor activity should be launched by TotalCommander in its own task.)
So I added intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK) to both buttons...
ImageButton button1 = (ImageButton) findViewById(R.id.imageButton1);
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse("file:///storage/emulated/0/myNotes.txt"), "text/plain");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
});
ImageButton button2 = (ImageButton) findViewById(R.id.imageButton2);
button2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent= getPackageManager().getLaunchIntentForPackage("com.ghisler.android.TotalCommander");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
});
...but this results in the same behavior. I assume the FLAG_ACTIVITY_NEW_TASKs are ignored because of the task affinities of the TotalCommander activites. How could I make FLAG_ACTIVITY_NEW_TASK ignore taskAffinity, or modify the taskAffinity of the relevant TotalCommander activities?
