Android三种播放视频的方式
在Android中,我们有三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。
1、调用其自带的播放器:
1 Uri uri = Uri.parse(Environment.getExternalStorageDirectory().getPath()+"/Test_Movie.m4v"); 2 //调用系统自带的播放器 3 Intent intent = new Intent(Intent.ACTION_VIEW); 4 Log.v("URI:::::::::", uri.toString()); 5 intent.setDataAndType(uri, "video/mp4"); 6 startActivity(intent);
2、使用VideoView来实现:
1 Uri uri = Uri.parse(Environment.getExternalStorageDirectory().getPath()+"/Test_Movie.m4v"); 2 VideoView videoView = (VideoView)this.findViewById(R.id.video_view); 3 videoView.setMediaController(new MediaController(this)); 4 videoView.setVideoURI(uri); 5 videoView.start(); 6 videoView.requestFocus();
3、使用MediaPlayer:
1 package demo.camera; 2 3 import java.io.IOException; 4 import android.app.Activity; 5 import android.media.MediaPlayer; 6 import android.media.MediaPlayer.OnCompletionListener; 7 import android.media.MediaPlayer.OnErrorListener; 8 import android.media.MediaPlayer.OnInfoListener; 9 import android.media.MediaPlayer.OnPreparedListener; 10 import android.media.MediaPlayer.OnSeekCompleteListener; 11 import android.media.MediaPlayer.OnVideoSizeChangedListener; 12 import android.os.Bundle; 13 import android.os.Environment; 14 import android.util.Log; 15 import android.view.Display; 16 import android.view.SurfaceHolder; 17 import android.view.SurfaceView; 18 import android.widget.LinearLayout; 19 20 /** 21 * 该实例中使用MediaPlayer完成播放,同时界面使用SurfaceView来实现 22 * 23 * 这里我们实现MediaPlayer中很多状态变化时的监听器 24 * 25 * 使用Mediaplayer时,也可以使用MediaController类,但是需要实现MediaController.mediaController接口 26 * 实现一些控制方法。 27 * 28 * 然后,设置controller.setMediaPlayer(),setAnchorView(),setEnabled(),show()就可以了,这里不再实现 29 * @author Administrator 30 * 31 */ 32 public class VideoSurfaceDemo extends Activity implements OnCompletionListener,OnErrorListener,OnInfoListener, OnPreparedListener, OnSeekCompleteListener,OnVideoSizeChangedListener,SurfaceHolder.Callback{ 33 private Display currDisplay; 34 private SurfaceView surfaceView; 35 private SurfaceHolder holder; 36 private MediaPlayer player; 37 private int vWidth,vHeight; 38 //private boolean readyToPlay = false; 39 40 public void onCreate(Bundle savedInstanceState){ 41 super.onCreate(savedInstanceState); 42 this.setContentView(R.layout.video_surface); 43 44 surfaceView = (SurfaceView)this.findViewById(R.id.video_surface); 45 //给SurfaceView添加CallBack监听 46 holder = surfaceView.getHolder(); 47 holder.addCallback(this); 48 //为了可以播放视频或者使用Camera预览,我们需要指定其Buffer类型 49 holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 50 51 //下面开始实例化MediaPlayer对象 52 player = new MediaPlayer(); 53 player.setOnCompletionListener(this); 54 player.setOnErrorListener(this); 55 player.setOnInfoListener(this); 56 player.setOnPreparedListener(this); 57 player.setOnSeekCompleteListener(this); 58 player.setOnVideoSizeChangedListener(this); 59 Log.v("Begin:::", "surfaceDestroyed called"); 60 //然后指定需要播放文件的路径,初始化MediaPlayer 61 String dataPath = Environment.getExternalStorageDirectory().getPath()+"/Test_Movie.m4v"; 62 try { 63 player.setDataSource(dataPath); 64 Log.v("Next:::", "surfaceDestroyed called"); 65 } catch (IllegalArgumentException e) { 66 e.printStackTrace(); 67 } catch (IllegalStateException e) { 68 e.printStackTrace(); 69 } catch (IOException e) { 70 e.printStackTrace(); 71 } 72 73 //然后,我们取得当前Display对象 74 currDisplay = this.getWindowManager().getDefaultDisplay(); 75 } 76 77 @Override 78 public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) { 79 // 当Surface尺寸等参数改变时触发 80 Log.v("Surface Change:::", "surfaceChanged called"); 81 } 82 83 @Override 84 public void surfaceCreated(SurfaceHolder holder) { 85 // 当SurfaceView中的Surface被创建的时候被调用 86 //在这里我们指定MediaPlayer在当前的Surface中进行播放 87 player.setDisplay(holder); 88 //在指定了MediaPlayer播放的容器后,我们就可以使用prepare或者prepareAsync来准备播放了 89 player.prepareAsync(); 90 91 } 92 93 @Override 94 public void surfaceDestroyed(SurfaceHolder holder) { 95 Log.v("Surface Destory:::", "surfaceDestroyed called"); 96 } 97 98 @Override 99 public void onVideoSizeChanged(MediaPlayer arg0, int arg1, int arg2) { 100 // 当video大小改变时触发 101 //这个方法在设置player的source后至少触发一次 102 Log.v("Video Size Change", "onVideoSizeChanged called"); 103 } 104 105 @Override 106 public void onSeekComplete(MediaPlayer arg0) { 107 // seek操作完成时触发 108 Log.v("Seek Completion", "onSeekComplete called"); 109 } 110 111 @Override 112 public void onPrepared(MediaPlayer player) { 113 // 当prepare完成后,该方法触发,在这里我们播放视频 114 115 //首先取得video的宽和高 116 vWidth = player.getVideoWidth(); 117 vHeight = player.getVideoHeight(); 118 119 if (vWidth > currDisplay.getWidth() || vHeight > currDisplay.getHeight()) { 120 //如果video的宽或者高超出了当前屏幕的大小,则要进行缩放 121 float wRatio = (float)vWidth/(float)currDisplay.getWidth(); 122 float hRatio = (float)vHeight/(float)currDisplay.getHeight(); 123 124 //选择大的一个进行缩放 125 float ratio = Math.max(wRatio, hRatio); 126 127 vWidth = (int)Math.ceil((float)vWidth/ratio); 128 vHeight = (int)Math.ceil((float)vHeight/ratio); 129 130 //设置surfaceView的布局参数 131 surfaceView.setLayoutParams(new LinearLayout.LayoutParams(vWidth, vHeight)); 132 133 //然后开始播放视频 134 135 player.start(); 136 } 137 } 138 139 @Override 140 public boolean onInfo(MediaPlayer player, int whatInfo, int extra) { 141 // 当一些特定信息出现或者警告时触发 142 switch(whatInfo){ 143 case MediaPlayer.MEDIA_INFO_BAD_INTERLEAVING: 144 break; 145 case MediaPlayer.MEDIA_INFO_METADATA_UPDATE: 146 break; 147 case MediaPlayer.MEDIA_INFO_VIDEO_TRACK_LAGGING: 148 break; 149 case MediaPlayer.MEDIA_INFO_NOT_SEEKABLE: 150 break; 151 } 152 return false; 153 } 154 155 @Override 156 public boolean onError(MediaPlayer player, int whatError, int extra) { 157 Log.v("Play Error:::", "onError called"); 158 switch (whatError) { 159 case MediaPlayer.MEDIA_ERROR_SERVER_DIED: 160 Log.v("Play Error:::", "MEDIA_ERROR_SERVER_DIED"); 161 break; 162 case MediaPlayer.MEDIA_ERROR_UNKNOWN: 163 Log.v("Play Error:::", "MEDIA_ERROR_UNKNOWN"); 164 break; 165 default: 166 break; 167 } 168 return false; 169 } 170 171 @Override 172 public void onCompletion(MediaPlayer player) { 173 // 当MediaPlayer播放完成后触发 174 Log.v("Play Over:::", "onComletion called"); 175 this.finish(); 176 } 177 }