Android编程视频播放API之MediaPlayer用法示例

/** * Android API MediaPlayer示例 * * @description： * @author ldm * @date 2016-4-20 上午10:42:06 */public class MediaPlayerActivity extends Activity implements OnClickListener {  private Button mlocalvideo;  private Button mstreamvideo;  private Button mlocalaudio;  private Button mresourcesaudio;  private static final String MEDIA = "media";  private static final int LOCAL_AUDIO = 1;  private static final int RESOURCES_AUDIO = 3;  private static final int STREAM_VIDEO = 5;  @Override  protected void onCreate(Bundle icicle) {    super.onCreate(icicle);    setContentView(R.layout.activity_mediaplayer);    initViewsAndEvents();  }  private void initViewsAndEvents() {    mlocalaudio = (Button) findViewById(R.id.localaudio);    mresourcesaudio = (Button) findViewById(R.id.resourcesaudio);    mlocalvideo = (Button) findViewById(R.id.localvideo);    mstreamvideo = (Button) findViewById(R.id.streamvideo);    mlocalaudio.setOnClickListener(this);    mresourcesaudio.setOnClickListener(this);    mlocalvideo.setOnClickListener(this);    mstreamvideo.setOnClickListener(this);  }  @Override  public void onClick(View v) {    switch (v.getId()) {    case R.id.localaudio:    case R.id.localvideo:      Intent intent = new Intent(MediaPlayerActivity.this.getApplication(),          MediaPlayerDemo_Audio.class);      intent.putExtra(MEDIA, LOCAL_AUDIO);      startActivity(intent);      break;    case R.id.resourcesaudio:      Intent resIn = new Intent(MediaPlayerActivity.this.getApplication(),          MediaPlayerDemo_Audio.class);      resIn.putExtra(MEDIA, RESOURCES_AUDIO);      startActivity(resIn);      break;    case R.id.streamvideo:      Intent streamIn = new Intent(MediaPlayerActivity.this,          MediaPlayerDemo_Video.class);      streamIn.putExtra(MEDIA, STREAM_VIDEO);      startActivity(streamIn);      break;    }  }}

/** * OnBufferingUpdateListener可以获取视频音频流的缓冲状态; * OnCompletionListener播放完毕监听器 * OnPreparedListener准备播放相关接口 * OnVideoSizeChangedListener注册视频大小改变监听器 * SurfaceHolder.Callback：SurfaceView监听callback * @description： * @author ldm * @date 2016-4-20 上午9:46:16 */public class MediaPlayer_Video extends Activity implements    OnBufferingUpdateListener, OnCompletionListener,    OnPreparedListener, OnVideoSizeChangedListener, SurfaceHolder.Callback {  private static final String TAG = "MediaPlayerDemo";  //Video宽度  private int mVideoWidth;  //Video高度  private int mVideoHeight;  //播放器MediaPlayer  private MediaPlayer mMediaPlayer;  //播放界面SurfaceView  private SurfaceView mPreview;  //媒体播放器的载体 SurfaceHolder  private SurfaceHolder holder;  //文件路径  private String path;  //Bundle数据对象  private Bundle extras;  private static final String MEDIA = "media";  private static final int LOCAL_VIDEO = 1;  private static final int RESOURCES_AUDIO = 3;  private static final int STREAM_VIDEO = 5;  private boolean mIsVideoSizeKnown = false;  private boolean mIsVideoReadyToBePlayed = false;  @SuppressWarnings("deprecation")  @Override  public void onCreate(Bundle icicle) {    super.onCreate(icicle);    setContentView(R.layout.mediaplayer_2);    mPreview = (SurfaceView) findViewById(R.id.surface);    holder = mPreview.getHolder();    holder.addCallback(this);    //高版本上已经不推荐使用了 ，如果要兼容低版本（如Android 2.3或以下版本）要加上这段代码，不然播放时 只会有声音 没有图像。    holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);    extras = getIntent().getExtras();  }  private void playVideo(Integer Media) {    doCleanUp();    try {      switch (Media) {        case LOCAL_VIDEO://本地文件（如SD卡）          /*           * TODO:将路径变量设置为本地媒体文件路径。           */          path = "";//这里要填写你所播放音视频的文件路径          if (path == "") {            Toast                .makeText(                    MediaPlayer_Video.this,                    "Please edit MediaPlayerDemo_Video Activity, "                        + "and set the path variable to your media file path."                        + " Your media file must be stored on sdcard.",                    Toast.LENGTH_LONG).show();          }          break;        case STREAM_VIDEO://流文件          /**           * 路径变量设置为mp4或3gpp格式的URL。应该使用Http协议。           * 媒体播放器只能通过流的形式获取数据，所以需要:           * 1。必须是媒体流数据。           * 2。必须合理剪辑。           */          path = "";          if (path == "") {            // Tell the user to provide a media file URL.            Toast                .makeText(                    MediaPlayer_Video.this,                    "Please edit MediaPlayerDemo_Video Activity,"                        + " and set the path variable to your media file URL.",                    Toast.LENGTH_LONG).show();          }          break;        case RESOURCES_AUDIO:          //播放放在诸如res/raw文件夹下的资源文件          //直接通过mMediaPlayer = MediaPlayer.create(this, R.raw.test_cbr);          //可以参考API Demos中AudioFxDemo类文件          break;      }      // 创建MediaPlayer对象，传入文件数据并设备监听      mMediaPlayer = new MediaPlayer();      mMediaPlayer.setDataSource(path);      mMediaPlayer.setDisplay(holder);      //使用 create() 方法创建的 MediaPlayer, 直接指定了 媒体资源, 不需要再进行 调用 prepare() 方法;      mMediaPlayer.prepare();      mMediaPlayer.setOnBufferingUpdateListener(this);      mMediaPlayer.setOnCompletionListener(this);      mMediaPlayer.setOnPreparedListener(this);      mMediaPlayer.setOnVideoSizeChangedListener(this);      //指定音频流类型      mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);    } catch (Exception e) {      Log.e(TAG, "error: " + e.getMessage(), e);    }  }  public void onBufferingUpdate(MediaPlayer arg0, int percent) {    Log.d(TAG, "onBufferingUpdate percent:" + percent);  }  public void onCompletion(MediaPlayer arg0) {    Log.d(TAG, "onCompletion called");  }  public void onVideoSizeChanged(MediaPlayer mp, int width, int height) {    Log.v(TAG, "onVideoSizeChanged called");    if (width == 0 || height == 0) {      Log.e(TAG, "invalid video width(" + width + ") or height(" + height + ")");      return;    }    mIsVideoSizeKnown = true;    mVideoWidth = width;    mVideoHeight = height;    if (mIsVideoReadyToBePlayed && mIsVideoSizeKnown) {      startVideoPlayback();    }  }  public void onPrepared(MediaPlayer mediaplayer) {    Log.d(TAG, "onPrepared called");    mIsVideoReadyToBePlayed = true;    if (mIsVideoReadyToBePlayed && mIsVideoSizeKnown) {      startVideoPlayback();    }  }  public void surfaceChanged(SurfaceHolder surfaceholder, int i, int j, int k) {    Log.d(TAG, "surfaceChanged called");  }  public void surfaceDestroyed(SurfaceHolder surfaceholder) {    Log.d(TAG, "surfaceDestroyed called");  }  public void surfaceCreated(SurfaceHolder holder) {    Log.d(TAG, "surfaceCreated called");    playVideo(extras.getInt(MEDIA));  }  @Override  protected void onPause() {    super.onPause();    releaseMediaPlayer();    doCleanUp();  }  @Override  protected void onDestroy() {    super.onDestroy();    releaseMediaPlayer();    doCleanUp();  }  private void releaseMediaPlayer() {    if (mMediaPlayer != null) {      mMediaPlayer.release();      mMediaPlayer = null;    }  }  private void doCleanUp() {    mVideoWidth = 0;    mVideoHeight = 0;    mIsVideoReadyToBePlayed = false;    mIsVideoSizeKnown = false;  }  private void startVideoPlayback() {    Log.v(TAG, "startVideoPlayback");    holder.setFixedSize(mVideoWidth, mVideoHeight);    mMediaPlayer.start();  }}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:orientation="vertical"  android:layout_width="match_parent"  android:layout_height="match_parent"  >  <Button android:id="@+id/localvideo"    android:layout_height="wrap_content"    android:layout_width="match_parent"    android:text="@string/local_video"  />  <Button android:id="@+id/streamvideo"    android:layout_height="wrap_content"    android:layout_width="match_parent"    android:text="@string/stream_video"  />  <Button android:id="@+id/localaudio"    android:layout_height="wrap_content"    android:layout_width="match_parent"    android:text="@string/local_audio"  />  <Button android:id="@+id/resourcesaudio"    android:layout_height="wrap_content"    android:layout_width="match_parent"    android:text="@string/res_audio"  /></LinearLayout>

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:orientation="vertical"  android:layout_width="match_parent"  android:layout_height="match_parent">  <SurfaceView android:id="@+id/surface"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_gravity="center">  </SurfaceView></LinearLayout>