Toast coming Multiple Times

Question

In my application , on a button click I am creating a Toast as -

Toast.makeText(context,"Please Enter Username",Toast.LENGTH_SHORT).show();

But when someone clicks on the button 5-6 times and closes the application, or goes on another screen, it still keeps on showing the Toast for sometime on another screen also. I have seen many solutions for the same.

I have tried -

toast = Toast.makeText(LoginActivity.this, message, Toast.LENGTH_SHORT);
        toast.show();

and have cancelled this toast-

onPause(){

if(toast!=null){
toast.cancel();

}

and same on onDestroy()

I want that when anyone clicks on the button 5-6 times and goes out of the app or that activity, the toast message should disappear. Or suggest any alternate to solve the same.

Answer 1

But it gives me a force close as - Toast was never called by using Toast.makeText();

You can make a field variable and method to only display one Toast at a time:

Toast toast;

public void displayToast(String message) {
    if(toast != null)
        toast.cancel();
    toast = Toast.makeText(context, message, Toast.LENGTH_SHORT);
    toast.show();
}

And in onPause() cancel any existing Toast when you exit:

protected void onPause() {
    if(toast != null)
        toast.cancel();
    super.onPause();
}

Now whenever you want to display a Toast, simply call:

displayToast("Please Enter Username");