Java tutorial
//package com.java2s; import android.app.Activity; import android.content.pm.ActivityInfo; public class Main { public static void rotateScreen(Activity activity) { if (activity.getRequestedOrientation() != ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE) { activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); } else { activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); } } }