java – Why might the collapse method not work?

Question:

I need after clicking on the button that is attached to the push notification for the StatusBar collapse.

To do this, I found this method.

private void expandStatusBar(Context context){
    Log.e("!!!!!!!!!!!!!!!!!!!!", "!!!!!!!!!!!!!!!!!!!!! 2");

    try
    {
        Log.e("!!!!!!!!!!!!!!!!!!!!", "!!!!!!!!!!!!!!!!!!!!! 3");

        Object service  = context.getSystemService("statusbar");
        Class<?> statusBarManager = Class.forName("android.app.StatusBarManager");
        if (Build.VERSION.SDK_INT <= 16)
        {
            Log.e("!!!!!!!!!!!!!!!!!!!!", "!!!!!!!!!!!!!!!!!!!!! 4");

            Method collapse = statusBarManager.getMethod("collapse");
            collapse.setAccessible(true);
            collapse.invoke(service);
        }
        else
        {

            Log.e("!!!!!!!!!!!!!!!!!!!!", "!!!!!!!!!!!!!!!!!!!!! 5");

            Method collapse2 = statusBarManager.getMethod("collapsePanels");
            collapse2.setAccessible(true);
            collapse2.invoke(service);
        }
    }catch(Exception ignored){}
}

I launch it right after the user clicks on the button:

mNotificationManager.cancel(0);
Log.e("!!!!!!!!!!!!!!!!!!!!", "!!!!!!!!!!!!!!!!!!!!! 1");
expandStatusBar(context);
new ModelViewer(context).openFileIfAvailable();

I tested it and everything goes through 1,2,3,4 in the logs, but the curtain does not collapse …

But in the code it underlines this line:

Object service  = context.getSystemService("statusbar");

and says that "statusbar" – there is no such thing … You need to select from Context.smth_else and select Context.NOTIFICATION_SERVICE , but still does not work …

Tried it like this:

Intent it = new Intent(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);

context.sendBroadcast (it);

But it doesn't work either …

Tell me what I'm doing wrong?

Answer:

Here's what you're doing wrong:

1. Write the log only BEFORE calling the critical section of the code
2. Suppress exceptions without even logging anything

How then can you be sure that the code is executed at all?