Use new InputDevice.getVibrator() API.

Bug: 6334179
Change-Id: I1e592fd1a58a8d0789548346aee1aff6ddb9d684

samples/ApiDemos/src/com/example/android/apis/view/GameView.java

@@ -23,6 +23,7 @@ import android.graphics.Path;
 import android.graphics.Paint.Style;
 import android.os.Handler;
 import android.os.SystemClock;
+import android.os.Vibrator;
 import android.util.AttributeSet;
 import android.view.InputDevice;
 import android.view.KeyEvent;
@@ -36,6 +37,10 @@ import java.util.Random;
 /**
  * A trivial joystick based physics game to demonstrate joystick handling.
  *
+ * If the game controller has a vibrator, then it is used to provide feedback
+ * when a bullet is fired or the ship crashes into an obstacle.  Otherwise, the
+ * system vibrator is used for that purpose.
+ *
  * @see GameControllerInput
  */
 public class GameView extends View {
@@ -307,6 +312,8 @@ public class GameView extends View {
             bullet.setVelocity(mShip.getBulletVelocityX(mBulletSpeed),
                     mShip.getBulletVelocityY(mBulletSpeed));
             mBullets.add(bullet);
+
+            getVibrator().vibrate(20);
         }
     }
 
@@ -316,12 +323,26 @@ public class GameView extends View {
         }
     }
 
+    private void crash() {
+        getVibrator().vibrate(new long[] { 0, 20, 20, 40, 40, 80, 40, 300 }, -1);
+    }
+
     private void reset() {
         mShip = new Ship();
         mBullets.clear();
         mObstacles.clear();
     }
 
+    private Vibrator getVibrator() {
+        if (mLastInputDevice != null) {
+            Vibrator vibrator = mLastInputDevice.getVibrator();
+            if (vibrator.hasVibrator()) {
+                return vibrator;
+            }
+        }
+        return (Vibrator)getContext().getSystemService(Context.VIBRATOR_SERVICE);
+    }
+
     void animateFrame() {
         long currentStepTime = SystemClock.uptimeMillis();
         step(currentStepTime);
@@ -680,6 +701,12 @@ public class GameView extends View {
         public float getDestroyAnimDuration() {
             return 1.0f;
         }
+
+        @Override
+        public void destroy() {
+            super.destroy();
+            crash();
+        }
     }
 
     private class Bullet extends Sprite {