You need to use a Theme.AppCompat theme (or descendant) with this activity. Change to Theme.AppCompat causes other error

Question

I use appcompat v22.1.0 in my App and use Toolbar. Everything was fine when I use Theme.AppCompat.Light.NoActionBar. When I start implement AlertDialog

Answer 1

This work for me... after read several answer was...

Change my import like this:

import android.app.AlertDialog;

instead of

import android.support.v7.app.AlertDialog; 

this give error Unable to add window -- token null is not for an application... so I change the context of the builder from

AlertDialog.Builder builder = new 

AlertDialog.Builder(getAplicationContext()); to

AlertDialog.Builder builder = new AlertDialog.Builder(*MainActivity.this*);