How to start an activity from a thread class in android?

Question

I am extending a thread class and from that class I want to start an activity. How to do this?

Answer 1

You need to call startActivity() on the application's main thread. One way to do that is by doing the following:

1. Initialize a Handler and associate it with the application's main thread.

   Handler handler = new Handler(Looper.getMainLooper());
   

2. Wrap the code that will start the Activity inside an anonymous Runnable class and pass it to the Handler#post(Runnable) method.

   handler.post(new Runnable() {
       @Override
       public void run() {
           Intent intent = new Intent (MyActivity.this, NextActivity.class);
           startActivity(intent);
       }
   });