Android - Event Keyboard

# Android - Event Keyboard ```java package exam.Input; import android.app.*; import android.content.*; import android.graphics.*; import android.os.*; import android.view.*; public class MoveCircle extends Activity { private MyView vw; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); vw = new MyView(this); vw.setFocusable(true); vw.setFocusableInTouchMode(true); setContentView(vw); } protected class MyView extends View { float mX,mY; int mColor; public MyView(Context context) { super(context); mX = 100; mY = 100; mColor = Color.BLUE; } public void onDraw(Canvas canvas) { Paint Pnt = new Paint(); canvas.drawColor(0xffe0e0e0); Pnt.setColor(mColor); Pnt.setAntiAlias(true); canvas.drawCircle(mX,mY,16,Pnt); } public boolean onKeyDown(int KeyCode, KeyEvent event) { super.onKeyDown(KeyCode, event); if (event.getAction() == KeyEvent.ACTION_DOWN) { switch (KeyCode) { case KeyEvent.KEYCODE_DPAD_LEFT: mX-=5; invalidate(); return true; case KeyEvent.KEYCODE_DPAD_RIGHT: mX+=5; invalidate(); return true; case KeyEvent.KEYCODE_DPAD_UP: mY-=5; invalidate(); return true; case KeyEvent.KEYCODE_DPAD_DOWN: mY+=5; invalidate(); return true; case KeyEvent.KEYCODE_DPAD_CENTER: if (mColor == Color.BLUE) { mColor = Color.RED; } else { mColor = Color.BLUE; } invalidate(); return true; } } return false; } } } ```