Change screen orientation programatically in android

In android there are different orientations for screen. While rotating the phone android has a default property of changing the orientation from portrait to landscape or vice versa. In this tutorial we will learn how to change the orientation on  a button click without rotation the phone.

It can be simply achieved by making use of setRequestedOrientation method in android. In this example we will have a button and while clicking on button it will change to landscape if it is in portrait mode and vice versa if it is in landscape mode.

To start , just add the below code to your layout for adding a button to your screen.

<Button
android:id="@+id/btn_change_orientation"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="orient"/>

Now use the below code in your activity

Button btn_change_orientation = (Button) findViewById(R.id.btn_change_orientation);

btn_change_orientation.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {


int orientation = getResources().getConfiguration().orientation;
if(orientation == Configuration.ORIENTATION_PORTRAIT){

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

}
else{

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

}
}
});