Android 使用Vitamio打造自己的万能播放器（2）—— 手势控制亮度、音量、缩放

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical" android:layout_width="match_parent"
 android:layout_height="match_parent">
 <io.vov.vitamio.widget.VideoView
 android:id="@+id/surface_view" android:layout_width="match_parent"
 android:layout_height="match_parent" android:layout_centerHorizontal="true"
 android:layout_centerVertical="true" />
 <FrameLayout android:id="@+id/operation_volume_brightness"
 android:visibility="invisible" android:layout_centerInParent="true"
 android:layout_width="wrap_content" android:layout_height="wrap_content"
 android:background="#00000000" android:orientation="horizontal"
 android:padding="0dip">
 <ImageView android:id="@+id/operation_bg"
 android:layout_gravity="center" android:src="@drawable/video_volumn_bg"
 android:layout_width="wrap_content" android:layout_height="wrap_content" />
 <FrameLayout android:layout_gravity="bottom|center_horizontal"
 android:layout_width="wrap_content" android:layout_height="wrap_content"
 android:paddingBottom="25dip">
 <ImageView android:id="@+id/operation_full"
 android:layout_gravity="left" android:src="@drawable/video_num_bg"
 android:layout_width="94dip" android:layout_height="wrap_content" />
 <ImageView android:id="@+id/operation_percent"
 android:layout_gravity="left" android:src="@drawable/video_num_front"
 android:layout_width="0dip" android:layout_height="wrap_content"
 android:scaleType="matrix" />
 </FrameLayout>
 </FrameLayout>
</RelativeLayout>

 /**
 * 
 * Android万能播放器
 * 
 * 
 */
 public class VideoViewDemo extends Activity {
 
 private String path = Environment.getExternalStorageDirectory()
 + "/Moon.mp4";
 private VideoView mVideoView;
 private View mVolumeBrightnessLayout;
 private ImageView mOperationBg;
 private ImageView mOperationPercent;
 private AudioManager mAudioManager;
 /** 最大声音 */
 private int mMaxVolume;
 /** 当前声音 */
 private int mVolume = -1;
 /** 当前亮度 */
 private float mBrightness = -1f;
 /** 当前缩放模式 */
 private int mLayout = VideoView.VIDEO_LAYOUT_ZOOM;
 private GestureDetector mGestureDetector;
 private MediaController mMediaController;
 
 @Override
 public void onCreate(Bundle icicle) {
 super.onCreate(icicle);
 setContentView(R.layout.videoview);
 mVideoView = (VideoView) findViewById(R.id.surface_view);
 mVolumeBrightnessLayout = findViewById(R.id.operation_volume_brightness);
 mOperationBg = (ImageView) findViewById(R.id.operation_bg);
 mOperationPercent = (ImageView) findViewById(R.id.operation_percent);
 
 mAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
 mMaxVolume = mAudioManager
 .getStreamMaxVolume(AudioManager.STREAM_MUSIC);
 mVideoView.setVideoPath(path);
 mMediaController = new MediaController(this);
 mVideoView.setMediaController(mMediaController);
 mVideoView.requestFocus();
 
 mGestureDetector = new GestureDetector(this, new MyGestureListener());
 }
 
 @Override
 public boolean onTouchEvent(MotionEvent event) {
 if (mGestureDetector.onTouchEvent(event))
 return true;
 
 // 处理手势结束
 switch (event.getAction() & MotionEvent.ACTION_MASK) {
 case MotionEvent.ACTION_UP:
 endGesture();
 break;
 }
 
 return super.onTouchEvent(event);
 }
 
 /** 手势结束 */
 private void endGesture() {
 mVolume = -1;
 mBrightness = -1f;
 
 // 隐藏
 mDismissHandler.removeMessages(0);
 mDismissHandler.sendEmptyMessageDelayed(0, 500);
 }
 
 private class MyGestureListener extends SimpleOnGestureListener {
 
 /** 双击 */
 @Override
 public boolean onDoubleTap(MotionEvent e) {
 if (mLayout == VideoView.VIDEO_LAYOUT_ZOOM)
 mLayout = VideoView.VIDEO_LAYOUT_ORIGIN;
 else
 mLayout++;
 if (mVideoView != null)
 mVideoView.setVideoLayout(mLayout, 0);
 return true;
 }
 
 /** 滑动 */
 @Override
 public boolean onScroll(MotionEvent e1, MotionEvent e2,
 float distanceX, float distanceY) {
 float mOldX = e1.getX(), mOldY = e1.getY();
 int y = (int) e2.getRawY();
 Display disp = getWindowManager().getDefaultDisplay();
 int windowWidth = disp.getWidth();
 int windowHeight = disp.getHeight();
 
 if (mOldX > windowWidth * 4.0 / 5)// 右边滑动
 onVolumeSlide((mOldY - y) / windowHeight);
 else if (mOldX < windowWidth / 5.0)// 左边滑动
 onBrightnessSlide((mOldY - y) / windowHeight);
 
 return super.onScroll(e1, e2, distanceX, distanceY);
 }
 }
 
 /** 定时隐藏 */
 private Handler mDismissHandler = new Handler() {
 @Override
 public void handleMessage(Message msg) {
 mVolumeBrightnessLayout.setVisibility(View.GONE);
 }
 };
 
 /**
 * 滑动改变声音大小
 * 
 * @param percent
 */
 private void onVolumeSlide(float percent) {
 if (mVolume == -1) {
 mVolume = mAudioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
 if (mVolume < 0)
 mVolume = 0;
 
 // 显示
 mOperationBg.setImageResource(R.drawable.video_volumn_bg);
 mVolumeBrightnessLayout.setVisibility(View.VISIBLE);
 }
 
 int index = (int) (percent * mMaxVolume) + mVolume;
 if (index > mMaxVolume)
 index = mMaxVolume;
 else if (index < 0)
 index = 0;
 
 // 变更声音
 mAudioManager.setStreamVolume(AudioManager.STREAM_MUSIC, index, 0);
 
 // 变更进度条
 ViewGroup.LayoutParams lp = mOperationPercent.getLayoutParams();
 lp.width = findViewById(R.id.operation_full).getLayoutParams().width
 * index / mMaxVolume;
 mOperationPercent.setLayoutParams(lp);
 }
 
 /**
 * 滑动改变亮度
 * 
 * @param percent
 */
 private void onBrightnessSlide(float percent) {
 if (mBrightness < 0) {
 mBrightness = getWindow().getAttributes().screenBrightness;
 if (mBrightness <= 0.00f)
 mBrightness = 0.50f;
 if (mBrightness < 0.01f)
 mBrightness = 0.01f;
 
 // 显示
 mOperationBg.setImageResource(R.drawable.video_brightness_bg);
 mVolumeBrightnessLayout.setVisibility(View.VISIBLE);
 }
 WindowManager.LayoutParams lpa = getWindow().getAttributes();
 lpa.screenBrightness = mBrightness + percent;
 if (lpa.screenBrightness > 1.0f)
 lpa.screenBrightness = 1.0f;
 else if (lpa.screenBrightness < 0.01f)
 lpa.screenBrightness = 0.01f;
 getWindow().setAttributes(lpa);
 
 ViewGroup.LayoutParams lp = mOperationPercent.getLayoutParams();
 lp.width = (int) (findViewById(R.id.operation_full).getLayoutParams().width * lpa.screenBrightness);
 mOperationPercent.setLayoutParams(lp);
 }
 
 @Override
 public void onConfigurationChanged(Configuration newConfig) {
 if (mVideoView != null)
 mVideoView.setVideoLayout(mLayout, 0);
 super.onConfigurationChanged(newConfig);
 }

 }