MediaPlayer视频播放器

android视频播放 根据apidemo重写。代码如下：

 

package com.jamdeo.tv.livetv.player;





import android.media.AudioManager;

import android.media.MediaPlayer;

import android.media.MediaPlayer.OnBufferingUpdateListener;

import android.media.MediaPlayer.OnCompletionListener;

import android.media.MediaPlayer.OnPreparedListener;

import android.media.MediaPlayer.OnVideoSizeChangedListener;

import android.util.Log;

import android.view.SurfaceHolder;

import android.view.SurfaceView;



public class MyPlayer extends MediaPlayer  implements

OnBufferingUpdateListener, OnCompletionListener,

OnPreparedListener, OnVideoSizeChangedListener {

	public static final MyPlayer mPlayer = new MyPlayer();

	private SurfaceHolder mHolder;

	private SurfaceView mSurfaceView;

    private boolean mIsVideoSizeKnown = false;

    private boolean mIsVideoReadyToBePlayed = false;

    private static final String TAG = "MyPlayer";

    private int mVideoWidth;

    private int mVideoHeight;

    private String mCurrentPath;

    private String mPreviousPath;

	private MyPlayer(){

		

	}

	

	public static MyPlayer getInstance(){

		return mPlayer;

	}

	

	private  void init(){

	     mPlayer.setOnBufferingUpdateListener(this);

	     mPlayer.setOnCompletionListener(this);

	     mPlayer.setOnPreparedListener(this);

	     mPlayer.setOnVideoSizeChangedListener(this);

	     mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

	}



	public void setSurfaceView(SurfaceView _surfaceView){

		init();

		this.mSurfaceView =  _surfaceView;

		this.mHolder = this.mSurfaceView.getHolder();

		//此方法请在setDataSource(..)之前调用，我起初就在setDataSource(...)方法后调用导致显示界面偏移

		mPlayer.setDisplay(this.mHolder);

	}

	

	public void setPath(String _path){

		this.mPreviousPath = this.mCurrentPath;

		this.mCurrentPath = _path;

		 if(this.mCurrentPath.equals(this.mPreviousPath)){

      	   return;

         }else{

        	 PlayVideo();

         }

		Log.d(TAG, "previous: " + this.mPreviousPath + "current: "+mCurrentPath);

	}

	public void PlayVideo(){

		try {

			Log.d(TAG, "previous: " + this.mPreviousPath + "current: "+mCurrentPath);

			doCleanUp();

			mPlayer.reset();

			mPlayer.setDataSource(mCurrentPath);

			mPlayer.prepareAsync();

	

		} catch (Exception e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		}

	}



	@Override

	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();

	        }

		

	}



	@Override

	public void onPrepared(MediaPlayer mp) {

		 Log.d(TAG, "onPrepared called");

	        mIsVideoReadyToBePlayed = true;

	        if (mIsVideoReadyToBePlayed && mIsVideoSizeKnown) {

	            startVideoPlayback();

	        }

		

	}



	@Override

	public void onCompletion(MediaPlayer mp) {

		 Log.d(TAG, "onCompletion called");

		

	}



	@Override

	public void onBufferingUpdate(MediaPlayer mp, int percent) {

		  Log.d(TAG, "onBufferingUpdate percent:" + percent);

		

	}

	

	   private void releaseMediaPlayer() {

	        if (mPlayer != null) {

	        	mPlayer.release();

	        }

	    }



	    private void doCleanUp() {

	        mVideoWidth = 0;

	        mVideoHeight = 0;

	        mIsVideoReadyToBePlayed = false;

	        mIsVideoSizeKnown = false;

	    }



	    private void startVideoPlayback() {

	        Log.v(TAG, "startVideoPlayback");

	        Log.d(TAG, "size: "+mVideoWidth +" x "+ mVideoHeight);

	        mHolder.setFixedSize(mVideoWidth, mVideoHeight);

	        mPlayer.start();

	    }



}

在外部使用的时候只需要传一个SurfaceView进去然后setPath(String url),就可以直接播放了。