Removing self from Android implicit intent

daisy1754 — Thu, 22 Feb 2018 04:54:07 +0000

Android provides an implicit intent to open apps based on user's intent (eg., I want to take a picture). It is simple yet very useful feature for users.

It may however be tricky when app can handle multiple implicit intent. For instance, if you develop a photo sharing app, your app can be a both receiver and sender of 'export an image' intent at the same time. When your users try to export an image from your app, it'd be awkward if your app is also in the receiver list.

To avoid situation like this, you can queryIntentActivities and explicitly filter intent as follows:

public static Intent createChooser(Context context, Intent target, CharSequence title) {
  List<ResolveInfo> resolveInfoList = context.getPackageManager().queryIntentActivities(
      target, PackageManager.MATCH_DEFAULT_ONLY);
  if (resolveInfoList.isEmpty()) {
    return Intent.createChooser(target, title);
  }

  Collections.sort(
      resolveInfoList, 
      new ResolveInfo.DisplayNameComparator(context.getPackageManager()));
  List<Intent> targetIntents = new ArrayList<Intent>();
  for (ResolveInfo resolveInfo : resolveInfoList) {
    if (context.getApplicationContext().getPackageName().equals(
        resolveInfo.activityInfo.packageName)) {
      continue;
    }
    Intent intent = new Intent(target);
    intent.setPackage(resolveInfo.activityInfo.packageName);
    intent.setClassName(
        resolveInfo.activityInfo.packageName, resolveInfo.activityInfo.name);
    targetIntents.add(intent);
  }

  Intent chooserIntent = Intent.createChooser(targetIntents.remove(0), title);
  chooserIntent.putExtra(
      Intent.EXTRA_INITIAL_INTENTS, 
      targetIntents.toArray(new Parcelable[]{}));
  return chooserIntent;
  }
}

DEV Community: daisy1754

Removing self from Android implicit intent