Android Multimedia实战系列将聚焦于android Multimedia模块，结合Android5.X到Android7.X或者到后来8.x 9.x最新Multimedia相关的API等，实现录制音视频，播放音视频，截图，录屏，编解码等实用功能！
下面不废话直接入正文：
github完整demo，欢迎star:https://github.com/WangShuo1143368701/VideoView
在Android中，我们有四种方式来实现视频的播放：
1、使用其自带的播放器。指定Action为ACTION_VIEW,Data为Uri，Type为其MIME类型。
2、使用VideoView来播放。在布局文件中使用VideoView结合MediaController来实现对其控制。
3、使用MediaPlayer类和SurfaceView来实现，这种方式很灵活。
4、使用MediaPlayer类和TextureView来实现，这种方式更灵活。
下面看代码示例：
1、调用其自带的播放器：
Uri uri = Uri.parse(Environment.getExternalStorageDirectory().getPath()+"/Test_Movie.m4v")//调用系统自带的播放器 Intent intent = new Intent(Intent.ACTION_VIEW) Log.v("URI:::::::::", uri.toString()) intent.setDataAndType(uri, "video/mp4") startActivity(intent)
2、使用VideoView来实现：
Uri uri = Uri.parse(Environment.getExternalStorageDirectory().getPath()+"/Test_Movie.m4v")VideoView videoView = (VideoView)this.findViewById(R.id.video_view)videoView.setMediaController(new MediaController(this))videoView.setVideoURI(uri)videoView.start()videoView.requestFocus()
在介绍三四中方式之前我们先比较一下SurfaceView及TextureView
SurfaceView优点及缺点：
优点：可以在一个独立的线程中进行绘制，不会影响主线程
使用双缓冲机制，播放视频时画面更流畅
缺点：Surface不在View hierachy中，它的显示也不受View的属性控制，所以不能进行平移，缩放等变换，也不能放在其它ViewGroup中。SurfaceView 不能嵌套使用
TextureView优点及缺点：
优点：支持移动、旋转、缩放等动画，支持截图
缺点：必须在硬件加速的窗口中使用，占用内存比SurfaceView高，在5.0以前在主线程渲染，5.0以后有单独的渲染线程。
小结：
从性能和安全性角度出发，使用播放器优先选SurfaceView。
1、在android 7.0上系统surfaceview的性能比TextureView更有优势，支持对象的内容位置和包含的应用内容同步更新，平移、缩放不会产生黑边。 在7.0以下系统如果使用场景有动画效果，可以选择性使用TextureView
2、由于失效(invalidation)和缓冲的特性，TextureView增加了额外1~3帧的延迟显示画面更新
3、TextureView总是使用GL合成，而SurfaceView可以使用硬件overlay后端，可以占用更少的内存带宽，消耗更少的能量
4、TextureView的内部缓冲队列导致比SurfaceView使用更多的内存
5、SurfaceView： 内部自己持有surface，surface 创建、销毁、大小改变时系统来处理的，通过surfaceHolder 的callback回调通知。当画布创建好时，可以将surface绑定到MediaPlayer中。SurfaceView如果为用户可见的时候，创建SurfaceView的SurfaceHolder用于显示视频流解析的帧图片，如果发现SurfaceView变为用户不可见的时候，则立即销毁SurfaceView的SurfaceHolder，以达到节约系统资源的目的
3、使用MediaPlayer类和SurfaceView来实现
package com.ws.videoview.videoview.view;import android.content.Context;import android.graphics.PixelFormat;import android.media.AudioManager;import android.media.MediaPlayer;import android.media.MediaPlayer.OnInfoListener;import android.media.MediaPlayer.OnVideoSizeChangedListener;import android.net.Uri;import android.os.Build;import android.os.Handler;import android.os.Message;import android.text.TextUtils;import android.util.AttributeSet;import android.util.Log;import android.view.KeyEvent;import android.view.SurfaceHolder;import android.view.SurfaceHolder.Callback;import android.view.SurfaceView;import java.io.IOException;/** * Created by Shuo.Wang on 2017/4/25. */public class SurfaceVideoView extends SurfaceView implements Callback { /** 定时暂停 */ private static final int HANDLER_MESSAGE_PARSE = 0; /** 定时循环 */ private static final int HANDLER_MESSAGE_LOOP = 1; private MediaPlayer.OnCompletionListener mOnCompletionListener; private MediaPlayer.OnPreparedListener mOnPreparedListener; private MediaPlayer.OnErrorListener mOnErrorListener; private MediaPlayer.OnSeekCompleteListener mOnSeekCompleteListener; private OnInfoListener mOnInfoListener; private OnVideoSizeChangedListener mOnVideoSizeChangedListener; private OnPlayStateListener mOnPlayStateListener; private MediaPlayer mMediaPlayer = null; private SurfaceHolder mSurfaceHolder = null; private static final int STATE_ERROR = -1; private static final int STATE_IDLE = 0; private static final int STATE_PREPARING = 1; private static final int STATE_PREPARED = 2; private static final int STATE_PLAYING = 3; private static final int STATE_PAUSED = 4; /** * PlaybackCompleted状态：文件正常播放完毕，而又没有设置循环播放的话就进入该状态， * 并会触发OnCompletionListener的onCompletion * ()方法。此时可以调用start()方法重新从头播放文件，也可以stop()停止MediaPlayer，或者也可以seekTo()来重新定位播放位置。 */ private static final int STATE_PLAYBACK_COMPLETED = 5; /** Released/End状态：通过release()方法可以进入End状态 */ private static final int STATE_RELEASED = 5; private int mCurrentState = STATE_IDLE; private int mTargetState = STATE_IDLE; private int mVideoWidth; private int mVideoHeight; private int mDuration; private Uri mUri; public SurfaceVideoView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); initVideoView(); } public SurfaceVideoView(Context context) { super(context); initVideoView(); } public SurfaceVideoView(Context context, AttributeSet attrs) { super(context, attrs); initVideoView(); } @SuppressWarnings("deprecation") protected void initVideoView() { mVideoWidth = 0; mVideoHeight = 0; getHolder().setFormat(PixelFormat.RGBA_8888); getHolder().addCallback(this); if (Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB) { getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); } setFocusable(true); setFocusableInTouchMode(true); requestFocus(); mCurrentState = STATE_IDLE; mTargetState = STATE_IDLE; } /** 更新音量 */ public static float getSystemVolumn(Context context) { if (context != null) { try { AudioManager mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); int maxVolumn = mAudioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC); return mAudioManager.getStreamVolume(AudioManager.STREAM_MUSIC) * 1.0F / maxVolumn; } catch (UnsupportedOperationException e) { } } return 0.5F; } public void setOnInfoListener(OnInfoListener l) { mOnInfoListener = l; } public void setOnVideoSizeChangedListener(OnVideoSizeChangedListener l) { mOnVideoSizeChangedListener = l; } public void setOnPreparedListener(MediaPlayer.OnPreparedListener l) { mOnPreparedListener = l; } public void setOnErrorListener(MediaPlayer.OnErrorListener l) { mOnErrorListener = l; } public void setOnPlayStateListener(OnPlayStateListener l) { mOnPlayStateListener = l; } public void setOnSeekCompleteListener(MediaPlayer.OnSeekCompleteListener l) { mOnSeekCompleteListener = l; } public static interface OnPlayStateListener { public void onStateChanged(boolean isPlaying); } public void setOnCompletionListener(MediaPlayer.OnCompletionListener l) { mOnCompletionListener = l; } public void setVideoPath(String path) { if (!TextUtils.isEmpty(path)) { mTargetState = STATE_PREPARED; openVideo(Uri.parse(path)); } } public int getVideoWidth() { return mVideoWidth; } public int getVideoHeight() { return mVideoHeight; } public void reOpen() { mTargetState = STATE_PREPARED; openVideo(mUri); } public int getDuration() { return mDuration; } /** 重试 */ private void tryAgain(Exception e) { mCurrentState = STATE_ERROR; openVideo(mUri); } public void start() { mTargetState = STATE_PLAYING; if (mMediaPlayer != null && (mCurrentState == STATE_PREPARED || mCurrentState == STATE_PAUSED || mCurrentState == STATE_PLAYING || mCurrentState == STATE_PLAYBACK_COMPLETED)) { try { if (!isPlaying()) mMediaPlayer.start(); mCurrentState = STATE_PLAYING; if (mOnPlayStateListener != null) mOnPlayStateListener.onStateChanged(true); } catch (IllegalStateException e) { tryAgain(e); } catch (Exception e) { tryAgain(e); } } } public void pause() { mTargetState = STATE_PAUSED; if (mMediaPlayer != null && (mCurrentState == STATE_PLAYING)) { try { mMediaPlayer.pause(); mCurrentState = STATE_PAUSED; if (mOnPlayStateListener != null) mOnPlayStateListener.onStateChanged(false); } catch (IllegalStateException e) { tryAgain(e); } catch (Exception e) { tryAgain(e); } } } /** 处理音量键 */ public void dispatchKeyEvent(Context context, KeyEvent event) { switch (event.getKeyCode()) { case KeyEvent.KEYCODE_VOLUME_DOWN: case KeyEvent.KEYCODE_VOLUME_UP: setVolume(getSystemVolumn(context)); break; } } public void setVolume(float volume) { if (mMediaPlayer != null && (mCurrentState == STATE_PREPARED || mCurrentState == STATE_PLAYING || mCurrentState == STATE_PAUSED || mCurrentState == STATE_PLAYBACK_COMPLETED)) { try { mMediaPlayer.setVolume(volume, volume); } catch (Exception e) { } } } public void setLooping(boolean looping) { if (mMediaPlayer != null && (mCurrentState == STATE_PREPARED || mCurrentState == STATE_PLAYING || mCurrentState == STATE_PAUSED || mCurrentState == STATE_PLAYBACK_COMPLETED)) { try { mMediaPlayer.setLooping(looping); } catch (Exception e) { } } } public void seekTo(int msec) { if (mMediaPlayer != null && (mCurrentState == STATE_PREPARED || mCurrentState == STATE_PLAYING || mCurrentState == STATE_PAUSED || mCurrentState == STATE_PLAYBACK_COMPLETED)) { try { if (msec < 0) msec = 0; mMediaPlayer.seekTo(msec); } catch (IllegalStateException e) { } catch (Exception e) { } } } /** 获取当前播放位置 */ public int getCurrentPosition() { int position = 0; if (mMediaPlayer != null) { switch (mCurrentState) { case STATE_PLAYBACK_COMPLETED: position = getDuration(); break; case STATE_PLAYING: case STATE_PAUSED: try { position = mMediaPlayer.getCurrentPosition(); } catch (IllegalStateException e) { } catch (Exception e) { } break; } } return position; } public boolean isPlaying() { if (mMediaPlayer != null && mCurrentState == STATE_PLAYING) { try { return mMediaPlayer.isPlaying(); } catch (IllegalStateException e) { } catch (Exception e) { } } return false; } /** 调用release方法以后MediaPlayer无法再恢复使用 */ public void release() { mTargetState = STATE_RELEASED; mCurrentState = STATE_RELEASED; if (mMediaPlayer != null) { try { mMediaPlayer.release(); } catch (IllegalStateException e) { } catch (Exception e) { } mMediaPlayer = null; } } public SurfaceHolder getSurfaceHolder() { return mSurfaceHolder; } public void openVideo(Uri uri) { if (uri == null || mSurfaceHolder == null || getContext() == null) { if (mSurfaceHolder == null && uri != null) { mUri = uri; } Log.e("openVideo ws--->","openVideo return"); return; } mUri = uri; mDuration = 0; Exception exception = null; try { if (mMediaPlayer == null) { mMediaPlayer = new MediaPlayer(); mMediaPlayer.setOnPreparedListener(mPreparedListener); mMediaPlayer.setOnCompletionListener(mCompletionListener); mMediaPlayer.setOnErrorListener(mErrorListener); mMediaPlayer.setOnVideoSizeChangedListener(mVideoSizeChangedListener); mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); mMediaPlayer.setOnSeekCompleteListener(mSeekCompleteListener); mMediaPlayer.setOnInfoListener(mInfoListener); mMediaPlayer.setDisplay(mSurfaceHolder); } else { mMediaPlayer.reset(); } mMediaPlayer.setDataSource(getContext(), uri); mMediaPlayer.prepareAsync(); mCurrentState = STATE_PREPARING; } catch (IOException ex) { exception = ex; } catch (IllegalArgumentException ex) { exception = ex; } catch (Exception ex) { exception = ex; } if (exception != null) { mCurrentState = STATE_ERROR; if (mErrorListener != null) mErrorListener.onError(mMediaPlayer, MediaPlayer.MEDIA_ERROR_UNKNOWN, 0); } } private MediaPlayer.OnCompletionListener mCompletionListener = new MediaPlayer.OnCompletionListener() { @Override public void onCompletion(MediaPlayer mp) { mCurrentState = STATE_PLAYBACK_COMPLETED; if (mOnCompletionListener != null) mOnCompletionListener.onCompletion(mp); } }; MediaPlayer.OnPreparedListener mPreparedListener = new MediaPlayer.OnPreparedListener() { @Override public void onPrepared(MediaPlayer mp) { if (mCurrentState == STATE_PREPARING) { mCurrentState = STATE_PREPARED; try { mDuration = mp.getDuration(); } catch (IllegalStateException e) { } try { mVideoWidth = mp.getVideoWidth(); mVideoHeight = mp.getVideoHeight(); } catch (IllegalStateException e) { } switch (mTargetState) { case STATE_PREPARED: if (mOnPreparedListener != null) mOnPreparedListener.onPrepared(mMediaPlayer); break; case STATE_PLAYING: start(); break; } } } }; OnVideoSizeChangedListener mVideoSizeChangedListener = new OnVideoSizeChangedListener() { @Override public void onVideoSizeChanged(MediaPlayer mp, int width, int height) { mVideoWidth = width; mVideoHeight = height; if (mOnVideoSizeChangedListener != null) mOnVideoSizeChangedListener.onVideoSizeChanged(mp, width, height); } }; OnInfoListener mInfoListener = new OnInfoListener() { @Override public boolean onInfo(MediaPlayer mp, int what, int extra) { if (mOnInfoListener != null) mOnInfoListener.onInfo(mp, what, extra); return false; } }; private MediaPlayer.OnSeekCompleteListener mSeekCompleteListener = new MediaPlayer.OnSeekCompleteListener() { @Override public void onSeekComplete(MediaPlayer mp) { if (mOnSeekCompleteListener != null) mOnSeekCompleteListener.onSeekComplete(mp); } }; private MediaPlayer.OnErrorListener mErrorListener = new MediaPlayer.OnErrorListener() { @Override public boolean onError(MediaPlayer mp, int framework_err, int impl_err) { mCurrentState = STATE_ERROR; if (mOnErrorListener != null) mOnErrorListener.onError(mp, framework_err, impl_err); return true; } }; /** 是否可用 */ public boolean isPrepared() { return mMediaPlayer != null && (mCurrentState == STATE_PREPARED); } public boolean isComplate(){ return mMediaPlayer != null && (mCurrentState == STATE_PLAYBACK_COMPLETED); } /** 是否已经释放 */ public boolean isRelease() { return mMediaPlayer == null || mCurrentState == STATE_IDLE || mCurrentState == STATE_ERROR || mCurrentState == STATE_RELEASED; } private Handler mVideoHandler = new Handler() { @Override public void handleMessage(Message msg) { switch (msg.what) { case HANDLER_MESSAGE_PARSE: pause(); break; case HANDLER_MESSAGE_LOOP: if (isPlaying()) { seekTo(msg.arg1); sendMessageDelayed(mVideoHandler.obtainMessage(HANDLER_MESSAGE_LOOP, msg.arg1, msg.arg2), msg.arg2); } break; default: break; } super.handleMessage(msg); } }; /** 定时暂停 */ public void pauseDelayed(int delayMillis) { if (mVideoHandler.hasMessages(HANDLER_MESSAGE_PARSE)) mVideoHandler.removeMessages(HANDLER_MESSAGE_PARSE); mVideoHandler.sendEmptyMessageDelayed(HANDLER_MESSAGE_PARSE, delayMillis); } /** 暂停并且清除定时任务 */ public void pauseClearDelayed() { pause(); if (mVideoHandler.hasMessages(HANDLER_MESSAGE_PARSE)) mVideoHandler.removeMessages(HANDLER_MESSAGE_PARSE); if (mVideoHandler.hasMessages(HANDLER_MESSAGE_LOOP)) mVideoHandler.removeMessages(HANDLER_MESSAGE_LOOP); } /** 区域内循环播放 */ public void loopDelayed(int startTime, int endTime) { if (mVideoHandler.hasMessages(HANDLER_MESSAGE_PARSE)) mVideoHandler.removeMessages(HANDLER_MESSAGE_PARSE); if (mVideoHandler.hasMessages(HANDLER_MESSAGE_LOOP)) mVideoHandler.removeMessages(HANDLER_MESSAGE_LOOP); int delayMillis = endTime - startTime; seekTo(startTime); if (!isPlaying()) start(); if (mVideoHandler.hasMessages(HANDLER_MESSAGE_LOOP)) mVideoHandler.removeMessages(HANDLER_MESSAGE_LOOP); mVideoHandler.sendMessageDelayed(mVideoHandler.obtainMessage(HANDLER_MESSAGE_LOOP, getCurrentPosition(), delayMillis), delayMillis); } @Override public void surfaceCreated(SurfaceHolder holder) { boolean needReOpen = (mSurfaceHolder == null); mSurfaceHolder = holder; if (needReOpen) { reOpen(); } } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { mSurfaceHolder = holder; } @Override public void surfaceDestroyed(SurfaceHolder holder) { mSurfaceHolder = null; release(); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); }}
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4、使用MediaPlayer类和TextureView来实现，这种方式更灵活。
TextureView特有API
1 getSurfaceTexture()
This method returns the SurfaceTexture used by this view.
2 getBitmap(int width, int height)
This method returns Returns a Bitmap representation of the content of the associated surface texture.
3 getTransform(Matrix transform)
This method returns the transform associated with this texture view.
4 isOpaque()
This method indicates whether this View is opaque.
5 lockCanvas()
This method start editing the pixels in the surface
6 setOpaque(boolean opaque)
This method indicates whether the content of this TextureView is opaque.
7 setTransform(Matrix transform)
This method sets the transform to associate with this texture view.
8 unlockCanvasAndPost(Canvas canvas)
This method finish editing pixels in the surface.
9 setAlpha和setRotation
package com.ws.videoview.videoview.view;/** * Created by Shuo.Wang on 2017/4/25. */import android.content.Context;import android.graphics.SurfaceTexture;import android.media.AudioManager;import android.media.MediaPlayer;import android.net.Uri;import android.os.Handler;import android.os.Message;import android.util.AttributeSet;import android.view.Surface;import android.view.TextureView;import java.io.IOException;public class TextureVideoView extends TextureView implements TextureView.SurfaceTextureListener { private MediaPlayer.OnCompletionListener mOnCompletionListener; private MediaPlayer.OnPreparedListener mOnPreparedListener; private MediaPlayer.OnErrorListener mOnErrorListener; private MediaPlayer.OnSeekCompleteListener mOnSeekCompleteListener; private OnPlayStateListener mOnPlayStateListener; private MediaPlayer mMediaPlayer = null; private SurfaceTexture mSurfaceHolder = null; private static final int STATE_ERROR = -1; private static final int STATE_IDLE = 0; private static final int STATE_PREPARING = 1; private static final int STATE_PREPARED = 2; private static final int STATE_PLAYING = 3; private static final int STATE_PAUSED = 4; private static final int STATE_STOP = 5; /** * PlaybackCompleted状态：文件正常播放完毕，而又没有设置循环播放的话就进入该状态， * 并会触发OnCompletionListener的onCompletion * ()方法。此时可以调用start()方法重新从头播放文件，也可以stop()停止MediaPlayer，或者也可以seekTo()来重新定位播放位置。 */ private static final int STATE_PLAYBACK_COMPLETED = 5; /** Released/End状态：通过release()方法可以进入End状态 */ private static final int STATE_RELEASED = 5; private int mCurrentState = STATE_IDLE; private int mTargetState = STATE_IDLE; private int mVideoWidth; private int mVideoHeight; private float mVolumn = -1; private int mDuration; private Uri mUri; public TextureVideoView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); initVideoView(); } public TextureVideoView(Context context) { super(context); initVideoView(); } public TextureVideoView(Context context, AttributeSet attrs) { super(context, attrs); initVideoView(); } public MediaPlayer getMediaPlayer(){ return mMediaPlayer; } protected void initVideoView() { try { AudioManager mAudioManager = (AudioManager) getContext().getSystemService(Context.AUDIO_SERVICE); mVolumn = mAudioManager.getStreamVolume(AudioManager.STREAM_MUSIC); } catch (UnsupportedOperationException e) { } mVideoWidth = 0; mVideoHeight = 0; setSurfaceTextureListener(this); mCurrentState = STATE_IDLE; mTargetState = STATE_IDLE; } public void setOnPreparedListener(MediaPlayer.OnPreparedListener l) { mOnPreparedListener = l; } public void setOnErrorListener(MediaPlayer.OnErrorListener l) { mOnErrorListener = l; } public void setOnPlayStateListener(OnPlayStateListener l) { mOnPlayStateListener = l; } public void setOnSeekCompleteListener(MediaPlayer.OnSeekCompleteListener l) { mOnSeekCompleteListener = l; } public static interface OnPlayStateListener { public void onStateChanged(boolean isPlaying); } public void setOnCompletionListener(MediaPlayer.OnCompletionListener l) { mOnCompletionListener = l; } public void setVideoPath(String path) { mTargetState = STATE_PREPARED; openVideo(Uri.parse(path)); } public int getVideoWidth() { return mVideoWidth; } public int getVideoHeight() { return mVideoHeight; } public void reOpen() { mTargetState = STATE_PREPARED; openVideo(mUri); } public int getDuration() { return mDuration; } /** 重试 */ private void tryAgain(Exception e) { e.printStackTrace(); mCurrentState = STATE_ERROR; openVideo(mUri); } public void start() { mTargetState = STATE_PLAYING; if (mMediaPlayer != null && (mCurrentState == STATE_PREPARED || mCurrentState == STATE_PAUSED || mCurrentState == STATE_PLAYING || mCurrentState == STATE_PLAYBACK_COMPLETED)) { try { if (!isPlaying()) mMediaPlayer.start(); mCurrentState = STATE_PLAYING; if (mOnPlayStateListener != null) mOnPlayStateListener.onStateChanged(true); } catch (IllegalStateException e) { tryAgain(e); } catch (Exception e) { tryAgain(e); } } } public void pause() { mTargetState = STATE_PAUSED; if (mMediaPlayer != null && (mCurrentState == STATE_PLAYING || mCurrentState == STATE_PAUSED)) { try { mMediaPlayer.pause(); mCurrentState = STATE_PAUSED; if (mOnPlayStateListener != null) mOnPlayStateListener.onStateChanged(false); } catch (IllegalStateException e) { tryAgain(e); } catch (Exception e) { tryAgain(e); } } } public void stop(){ mTargetState = STATE_STOP; if (mMediaPlayer != null && (mCurrentState == STATE_PLAYING || mCurrentState == STATE_PAUSED)) { try { mMediaPlayer.stop(); mCurrentState = STATE_STOP; if (mOnPlayStateListener != null) mOnPlayStateListener.onStateChanged(false); } catch (IllegalStateException e) { tryAgain(e); } catch (Exception e) { tryAgain(e); } } } public void setVolume(float volume) { if (mMediaPlayer != null && (mCurrentState == STATE_PREPARED || mCurrentState == STATE_PLAYING || mCurrentState == STATE_PAUSED || mCurrentState == STATE_PLAYBACK_COMPLETED)) { try { mMediaPlayer.setVolume(volume, volume); } catch (Exception e) { e.printStackTrace(); } } } public void setLooping(boolean looping) { if (mMediaPlayer != null && (mCurrentState == STATE_PREPARED || mCurrentState == STATE_PLAYING || mCurrentState == STATE_PAUSED || mCurrentState == STATE_PLAYBACK_COMPLETED)) { try { mMediaPlayer.setLooping(looping); } catch (Exception e) { e.printStackTrace(); } } } public void seekTo(int msec) { if (mMediaPlayer != null && (mCurrentState == STATE_PREPARED || mCurrentState == STATE_PLAYING || mCurrentState == STATE_PAUSED || mCurrentState == STATE_PLAYBACK_COMPLETED)) { try { if (msec < 0) msec = 0; mMediaPlayer.seekTo(msec); } catch (IllegalStateException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } } /** 获取当前播放位置 */ public int getCurrentPosition() { int position = 0; if (mMediaPlayer != null) { switch (mCurrentState) { case STATE_PLAYBACK_COMPLETED: position = getDuration(); break; case STATE_PLAYING: case STATE_PAUSED: try { position = mMediaPlayer.getCurrentPosition(); } catch (IllegalStateException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } break; } } return position; } public boolean isPlaying() { if (mMediaPlayer != null && mCurrentState == STATE_PLAYING) { try { return mMediaPlayer.isPlaying(); } catch (IllegalStateException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } return false; } /** 调用release方法以后MediaPlayer无法再恢复使用 */ public void release() { mTargetState = STATE_RELEASED; mCurrentState = STATE_RELEASED; if (mMediaPlayer != null) { try { mMediaPlayer.release(); } catch (IllegalStateException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } mMediaPlayer = null; } } public void openVideo(Uri uri) { if (uri == null || mSurfaceHolder == null || getContext() == null) { if (mSurfaceHolder == null && uri != null) { mUri = uri; } return; } mUri = uri; mDuration = 0; Exception exception = null; try { if (mMediaPlayer == null) { mMediaPlayer = new MediaPlayer(); mMediaPlayer.setOnPreparedListener(mPreparedListener); mMediaPlayer.setOnCompletionListener(mCompletionListener); mMediaPlayer.setOnErrorListener(mErrorListener); mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); mMediaPlayer.setOnSeekCompleteListener(mSeekCompleteListener); mMediaPlayer.setVolume(mVolumn, mVolumn); mMediaPlayer.setSurface(new Surface(mSurfaceHolder)); } else { mMediaPlayer.reset(); } mMediaPlayer.setDataSource(getContext(), uri); mMediaPlayer.prepareAsync(); mCurrentState = STATE_PREPARING; } catch (IOException ex) { exception = ex; } catch (IllegalArgumentException ex) { exception = ex; } catch (Exception ex) { exception = ex; } if (exception != null) { exception.printStackTrace(); mCurrentState = STATE_ERROR; if (mErrorListener != null) mErrorListener.onError(mMediaPlayer, MediaPlayer.MEDIA_ERROR_UNKNOWN, 0); } } private MediaPlayer.OnCompletionListener mCompletionListener = new MediaPlayer.OnCompletionListener() { @Override public void onCompletion(MediaPlayer mp) { mCurrentState = STATE_PLAYBACK_COMPLETED; if (mOnCompletionListener != null) mOnCompletionListener.onCompletion(mp); } }; MediaPlayer.OnPreparedListener mPreparedListener = new MediaPlayer.OnPreparedListener() { @Override public void onPrepared(MediaPlayer mp) { if (mCurrentState == STATE_PREPARING) { mCurrentState = STATE_PREPARED; try { mDuration = mp.getDuration(); } catch (IllegalStateException e) { e.printStackTrace(); } try { mVideoWidth = mp.getVideoWidth(); mVideoHeight = mp.getVideoHeight(); } catch (IllegalStateException e) { e.printStackTrace(); } switch (mTargetState) { case STATE_PREPARED: if (mOnPreparedListener != null) mOnPreparedListener.onPrepared(mMediaPlayer); break; case STATE_PLAYING: start(); break; } } } }; private MediaPlayer.OnSeekCompleteListener mSeekCompleteListener = new MediaPlayer.OnSeekCompleteListener() { @Override public void onSeekComplete(MediaPlayer mp) { if (mOnSeekCompleteListener != null) mOnSeekCompleteListener.onSeekComplete(mp); } }; private MediaPlayer.OnErrorListener mErrorListener = new MediaPlayer.OnErrorListener() { @Override public boolean onError(MediaPlayer mp, int framework_err, int impl_err) { mCurrentState = STATE_ERROR; if (mOnErrorListener != null) mOnErrorListener.onError(mp, framework_err, impl_err); return true; } }; @Override public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) { boolean needReOpen = (mSurfaceHolder == null); mSurfaceHolder = surface; if (needReOpen) { reOpen(); } } @Override public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) { } @Override public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) { mSurfaceHolder = null; release(); return true; } @Override public void onSurfaceTextureUpdated(SurfaceTexture surface) { } /** 是否可用 */ public boolean isPrepared() { return mMediaPlayer != null && (mCurrentState == STATE_PREPARED); } private static final int HANDLER_MESSAGE_PARSE = 0; private static final int HANDLER_MESSAGE_LOOP = 1; private Handler mVideoHandler = new Handler() { @Override public void handleMessage(Message msg) { switch (msg.what) { case HANDLER_MESSAGE_PARSE: pause(); break; case HANDLER_MESSAGE_LOOP: if (isPlaying()) { seekTo(msg.arg1); sendMessageDelayed(mVideoHandler.obtainMessage(HANDLER_MESSAGE_LOOP, msg.arg1, msg.arg2), msg.arg2); } break; default: break; } super.handleMessage(msg); } }; /** 定时暂停 */ public void pauseDelayed(int delayMillis) { if (mVideoHandler.hasMessages(HANDLER_MESSAGE_PARSE)) mVideoHandler.removeMessages(HANDLER_MESSAGE_PARSE); mVideoHandler.sendEmptyMessageDelayed(HANDLER_MESSAGE_PARSE, delayMillis); } /** 暂停并且清除定时任务 */ public void pauseClearDelayed() { pause(); if (mVideoHandler.hasMessages(HANDLER_MESSAGE_PARSE)) mVideoHandler.removeMessages(HANDLER_MESSAGE_PARSE); if (mVideoHandler.hasMessages(HANDLER_MESSAGE_LOOP)) mVideoHandler.removeMessages(HANDLER_MESSAGE_LOOP); } /** 区域内循环播放 */ public void loopDelayed(int startTime, int endTime) { int delayMillis = endTime - startTime; seekTo(startTime); if (!isPlaying()) start(); if (mVideoHandler.hasMessages(HANDLER_MESSAGE_LOOP)) mVideoHandler.removeMessages(HANDLER_MESSAGE_LOOP); mVideoHandler.sendMessageDelayed(mVideoHandler.obtainMessage(HANDLER_MESSAGE_LOOP, getCurrentPosition(), delayMillis), delayMillis); }}
