How do I programmatically launch a specific application?

Question

I want to launch a specif application.

I know how to do Intents but I want to avoid the selection menu if there are multiple apps that can handle the intent, I want

Answer 1

in oncreate method call => openApp(); method

private void openApp() {
    String packageName = "com.google.android.gm";
    if (isAppInstalled(activity, packageName))
        startActivity(getPackageManager().getLaunchIntentForPackage(packageName));
    else Toast.makeText(activity, "App not installed", Toast.LENGTH_SHORT).show();
}

public static boolean isAppInstalled(Activity activity, String packageName) {
    PackageManager pm = activity.getPackageManager();
    try {
        pm.getPackageInfo(packageName, PackageManager.GET_ACTIVITIES);
        return true;
    } catch (PackageManager.NameNotFoundException e) {
    }
    return false;
}

Answer 2

You should use the function of the package manager.

Context ctx=this; // or you can replace **'this'** with your **ActivityName.this**
try {
Intent i = ctx.getPackageManager().getLaunchIntentForPackage("com.twidroid.SendTweet");
ctx.startActivity(i);
} catch (NameNotFoundException e) {
    // TODO Auto-generated catch block
}

Answer 3

You use the package name / class directly, for example to create a new intent to call the twidroid program you'd use the followinglink text:

 Intent intent = new Intent("com.twidroid.SendTweet");

You'd probably want to put a try/catch around for a ActivityNotFoundException for when the application is not installed.

Answer 4

Intent intent = new Intent();    
intent.setClassName("package.name", "package.name.LauncherActivityName");
startActivityForResult(intent,REQUEST_CODE);

Answer 5

What i do to open apps is this

private void _LaunchApp(final String _Pack) {
    Intent launchi = new Intent(Intent.ACTION_VIEW);
    launchi.setData(Uri.parse("android-app://".concat(_Pack)));
    startActivity(launchi);
}

and the usage

_LaunchApp("your.package.here");

Answer 6

The activity you are calling should appear not only in the Manifest for its own package, but in the Manifest for the CALLING package, too. - don't forget!