Prevent screen rotation on Android

You can follow the logic below to prevent auto rotate screen while your AsyncTask is running:

1. Store your current screen orientation inside your activity using getRequestedOrientation().
2. Disable auto screen orientation using setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_NOSENSOR).
3. Run/execute your AsyncTask.
4. At the end of your AsyncTask restore your previous orientation status using setRequestedOrientation(oldOrientation).

Please note that there are several ways to access Activity (which runs on UI thread) properties inside an AsyncTask. You can implement your AsyncTask as an inner class or you can use message Handler that poke your Activiy class.

Add

android:screenOrientation="portrait" 

or

 android:screenOrientation="landscape" 

to the <activity> element/s in the manifest and you're done.

The easiest way I found to do this was to put

this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

within onCreate, just after

setContentView(R.layout.activity_main);

so...

@Override
protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}