android视频播放

视频播放我们用到的是MediaPlayer,显示控件使用的surfaceView

我们向SD卡中先添加个视频文件，我的是xajh.3gp，不要用mp4，MP4会出现should have subtitle controller already set的错误，应该是格式的问题造成的

我们看下布局文件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/LinearLayout1"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context="com.ssln.video.MainActivity" >    <SurfaceView        android:id="@+id/surfaceView"        android:layout_width="320dp"        android:layout_height="200dp"        />    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content" >        <Button            android:id="@+id/button1"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="播放" />        <Button            android:id="@+id/button2"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="暂停" />            </LinearLayout>    </LinearLayout>

代码如下

package com.ssln.video;import java.io.IOException;import android.app.Activity;import android.graphics.PixelFormat;import android.media.AudioManager;import android.media.MediaPlayer;import android.os.Bundle;import android.os.Environment;import android.view.SurfaceHolder;import android.view.SurfaceHolder.Callback;import android.view.SurfaceView;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class MainActivity extends Activity implements OnClickListener,Callback {        private Button btnPlay,btnStop;    private SurfaceHolder surfaceHolder;    private SurfaceView surfaceView;    private MediaPlayer  mPlayer;    private boolean isPause=false;        @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);                btnPlay=(Button)findViewById(R.id.button1);        btnStop=(Button)findViewById(R.id.button2);        btnPlay.setOnClickListener(this);        btnStop.setOnClickListener(this);                this.getWindow().setFormat(PixelFormat.UNKNOWN); //设置窗口为未知像素模式        surfaceView=(SurfaceView)findViewById(R.id.surfaceView);        surfaceHolder=surfaceView.getHolder();        surfaceHolder.addCallback(this);        //添加回调函数        surfaceHolder.setFixedSize(176, 144);        surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);        mPlayer=new MediaPlayer();    }    /**     * 自定义播放视频函数     * @param strPath     */    private void PlayVideo(String strPath)    {        //如果是播放状态，就从新开始播放        if(mPlayer.isPlaying()){            mPlayer.reset();            mPlayer.release();        }        mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);        mPlayer.setDisplay(surfaceHolder); //设置影片在surfaceHolder中播放            try {            //设置播放路径            mPlayer.setDataSource(strPath);            mPlayer.prepare();        } catch (Exception e) {            e.printStackTrace();        }        mPlayer.start();    }    @Override    public void surfaceCreated(SurfaceHolder holder) {            }    @Override    public void surfaceChanged(SurfaceHolder holder, int format, int width,            int height) {            }    @Override    public void surfaceDestroyed(SurfaceHolder holder) {            }    @Override    public void onClick(View v) {        if(v==btnPlay)        {            isPause=false;             PlayVideo(Environment.getExternalStorageDirectory().getPath()+"/xajh.3gp");        }        else if(v==btnStop){    //如果是播放就暂停            if(!isPause){                mPlayer.pause();                isPause=true;            }            else    //如果是暂停就继续播放            {                mPlayer.start();                isPause=false;            }        }    }}

最后不要忘记加入SD卡的读取权限

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.ssln.video"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="8"        android:targetSdkVersion="21" />        <!-- SD卡访问权限 -->    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name=".MainActivity"            android:label="@string/app_name" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>    </application></manifest>

效果如下

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