Android播放视频的三种方式

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:

Uriuri = Uri.parse(Environment.getExternalStorageDirectory().getPath()+"/Test_Movie.m4v");

//调用系统自带的播放器

Intentintent = new Intent(Intent.ACTION_VIEW);

Log.v("URI:::::::::", uri.toString());

intent.setDataAndType(uri, "video/mp4");

startActivity(intent);

2、使用VideoView来实现:

Uriuri = Uri.parse(Environment.getExternalStorageDirectory().getPath()+"/Test_Movie.m4v");

VideoViewvideoView = (VideoView)this.findViewById(R.id.video_view);

videoView.setMediaController(new MediaController(this));

videoView.setVideoURI(uri);

videoView.start();

videoView.requestFocus();

3、使用MediaPlayer:

package demo.camera;

import java.io.IOException;

import android.app.Activity;

import android.media.MediaPlayer;

import android.media.MediaPlayer.OnCompletionListener;

import android.media.MediaPlayer.OnErrorListener;

import android.media.MediaPlayer.OnInfoListener;

import android.media.MediaPlayer.OnPreparedListener;

import android.media.MediaPlayer.OnSeekCompleteListener;

import android.media.MediaPlayer.OnVideoSizeChangedListener;

import android.os.Bundle;

import android.os.Environment;

import android.util.Log;

import android.view.Display;

import android.view.SurfaceHolder;

import android.view.SurfaceView;

import android.widget.LinearLayout;

/**

* 该实例中使用MediaPlayer完成播放,同时界面使用SurfaceView来实现

*

* 这里我们实现MediaPlayer中很多状态变化时的监听器

*

* 使用Mediaplayer时,也可以使用MediaController类,但是需要实现MediaController.mediaController接口

* 实现一些控制方法。

*

* 然后,设置controller.setMediaPlayer(),setAnchorView(),setEnabled(),show()就可以了,这里不再实现

* @author Administrator

*

*/

public class VideoSurfaceDemoextends Activityimplements OnCompletionListener,OnErrorListener,OnInfoListener,

OnPreparedListener, OnSeekCompleteListener,OnVideoSizeChangedListener,SurfaceHolder.Callback{

private DisplaycurrDisplay;

private SurfaceViewsurfaceView;

private SurfaceHolderholder;

private MediaPlayerplayer;

private int vWidth,vHeight;

//private boolean readyToPlay = false;

public void onCreate(BundlesavedInstanceState){

super.onCreate(savedInstanceState);

this.setContentView(R.layout.video_surface);

surfaceView = (SurfaceView)this.findViewById(R.id.video_surface);

//给SurfaceView添加CallBack监听

holder = surfaceView.getHolder();

holder.addCallback(this);

//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

holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

//下面开始实例化MediaPlayer对象

player = new MediaPlayer();

player.setOnCompletionListener(this);

player.setOnErrorListener(this);

player.setOnInfoListener(this);

player.setOnPreparedListener(this);

player.setOnSeekCompleteListener(this);

player.setOnVideoSizeChangedListener(this);

Log.v("Begin:::", "surfaceDestroyed called");

//然后指定需要播放文件的路径,初始化MediaPlayer

String dataPath = Environment.getExternalStorageDirectory().getPath()+"/Test_Movie.m4v";

try {

player.setDataSource(dataPath);

Log.v("Next:::", "surfaceDestroyed called");

} catch (IllegalArgumentException e) {

e.printStackTrace();

} catch (IllegalStateException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

//然后,我们取得当前Display对象

currDisplay = this.getWindowManager().getDefaultDisplay();

}

@Override

public void surfaceChanged(SurfaceHolderarg0, int arg1, int arg2, int arg3) {

// 当Surface尺寸等参数改变时触发

Log.v("Surface Change:::", "surfaceChanged called");

}

@Override

public void surfaceCreated(SurfaceHolderholder) {

// 当SurfaceView中的Surface被创建的时候被调用

//在这里我们指定MediaPlayer在当前的Surface中进行播放

player.setDisplay(holder);

//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

player.prepareAsync();

}

@Override

public void surfaceDestroyed(SurfaceHolderholder) {

Log.v("Surface Destory:::", "surfaceDestroyed called");

}

@Override

public void onVideoSizeChanged(MediaPlayerarg0, int arg1, int arg2) {

// 当video大小改变时触发

//这个方法在设置player的source后至少触发一次

Log.v("Video Size Change", "onVideoSizeChanged called");

}

@Override

public void onSeekComplete(MediaPlayerarg0) {

// seek操作完成时触发

Log.v("Seek Completion", "onSeekComplete called");

}

@Override

public void onPrepared(MediaPlayerplayer) {

// 当prepare完成后,该方法触发,在这里我们播放视频

//首先取得video的宽和高

vWidth = player.getVideoWidth();

vHeight = player.getVideoHeight();

if(vWidth > currDisplay.getWidth() || vHeight > currDisplay.getHeight()){

//如果video的宽或者高超出了当前屏幕的大小,则要进行缩放

float wRatio = (float)vWidth/(float)currDisplay.getWidth();

float hRatio = (float)vHeight/(float)currDisplay.getHeight();

//选择大的一个进行缩放

float ratio = Math.max(wRatio, hRatio);

vWidth = (int)Math.ceil((float)vWidth/ratio);

vHeight = (int)Math.ceil((float)vHeight/ratio);

//设置surfaceView的布局参数

surfaceView.setLayoutParams(new LinearLayout.LayoutParams(vWidth, vHeight));

//然后开始播放视频

player.start();

}

}

@Override

public boolean onInfo(MediaPlayerplayer, int whatInfo, int extra) {

// 当一些特定信息出现或者警告时触发

switch(whatInfo){

case MediaPlayer.MEDIA_INFO_BAD_INTERLEAVING:

break;

case MediaPlayer.MEDIA_INFO_METADATA_UPDATE:

break;

case MediaPlayer.MEDIA_INFO_VIDEO_TRACK_LAGGING:

break;

case MediaPlayer.MEDIA_INFO_NOT_SEEKABLE:

break;

}

return false;

}

@Override

public boolean onError(MediaPlayerplayer, int whatError, int extra) {

Log.v("Play Error:::", "onError called");

switch (whatError) {

case MediaPlayer.MEDIA_ERROR_SERVER_DIED:

Log.v("Play Error:::", "MEDIA_ERROR_SERVER_DIED");

break;

case MediaPlayer.MEDIA_ERROR_UNKNOWN:

Log.v("Play Error:::", "MEDIA_ERROR_UNKNOWN");

break;

default:

break;

}

return false;

}

@Override

public void onCompletion(MediaPlayerplayer) {

// 当MediaPlayer播放完成后触发

Log.v("Play Over:::", "onComletion called");

this.finish();

}

}

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