Android - Using try and catch

Question

I want my try to start an intent that uses an another application. But if that application is not installed on that phone i want to show a dialog to inform the user to install the app. I tried the code below:

try {
    startActivity(i);
} catch (Exception e) {
    AlertDialog.Builder b = new AlertDialog.Builder(getApplicationContext());
    b.setMessage("Message Here");
    b.create().show();
}

`

Answer 1

Check installed apps by using this methond

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