public class MainActivity extends Activity
		implements ResizeRelativeLayout.OnResizeLayout{
	//...
	private ResizeRelativeLayout layout;
	
	@Override
	public void onCreate(Bundle savedInstanceState) {
		  super.onCreate(savedInstanceState);
		  setContainView(R.layout.activity_main);
		  //...
		  layout = (ResizeRelativeLayout) findViewById(R.id.layout_contain);
		  layout.setOnResizeLayout(this);
	}
	@Override
	public void onSoftKeyboardHide() {
		//...
	}

	@Override
	public void onSoftKeyboardShow() {
		//...
	}
}