Android(Java):视频播放

在main.xml布局文件添加用于视频画面绘制的SurfaceView控件：

<SurfaceViewandroid:layout_width="fill_parent"android:layout_height="240dip"android:id="@+id/surfaceView" />

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

surfaceView.getHolder().setFixedSize(176, 144); //设置分辨率

/*下面设置Surface不维护自己的缓冲区，而是等待屏幕的渲染引擎将内容推送到用户面前*/

surfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

MediaPlayermediaPlayer = newMediaPlayer();

mediaPlayer.reset();//重置为初始状态

mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

/* 设置Video影片以SurfaceHolder播放 */

mediaPlayer.setDisplay(surfaceView.getHolder());

mediaPlayer.setDataSource("/mnt/sdcard/oppo.mp4");

mediaPlayer.prepare();//缓冲 

mediaPlayer.start();//播放

mediaPlayer.pause();//暂停播放

mediaPlayer.start();//恢复播放

mediaPlayer.stop();//停止播放

mediaPlayer.release();//释放资源

 

package cn.itcast.video;

import java.io.IOException;

import android.app.Activity;

import android.media.AudioManager;

import android.media.MediaPlayer;

import android.os.Bundle;

import android.util.Log;

import android.view.SurfaceHolder;

import android.view.SurfaceView;

import android.view.View;

import android.widget.EditText;

import android.widget.ImageButton;

public class VideoActivity extends Activity {

    private static final String TAG = "VideoActivity";

    private EditTextfilenameText;

    private SurfaceViewsurfaceView;

    private MediaPlayermediaPlayer;

    private String filename;//当前播放文件的名称

    private int position;//记录播放位置

   

    @Override

    public void onCreate(BundlesavedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main); 

       

        this.mediaPlayer = newMediaPlayer();

        this.filenameText = (EditText)this.findViewById(R.id.filename);

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

        ImageButtonplayButton = (ImageButton)this.findViewById(R.id.play);

        ImageButtonpauseButton = (ImageButton)this.findViewById(R.id.pause);

        ImageButtonresetButton = (ImageButton)this.findViewById(R.id.reset);

        ImageButtonstopButton = (ImageButton)this.findViewById(R.id.stop);

       

        ButtonClickListener listener = newButtonClickListener();  

        playButton.setOnClickListener(listener);

        pauseButton.setOnClickListener(listener);

        resetButton.setOnClickListener(listener);

        stopButton.setOnClickListener(listener);

        /*下面设置Surface不维护自己的缓冲区，而是等待屏幕的渲染引擎将内容推送到用户面前*/

        this.surfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

        this.surfaceView.getHolder().setFixedSize(176, 144);//设置分辨率

        this.surfaceView.getHolder().setKeepScreenOn(true);

        this.surfaceView.getHolder().addCallback(newSurfaceListener());

    }

    private class ButtonClickListener implementsView.OnClickListener{

  @Override

  public void onClick(View v) {

  try {

  switch (v.getId()) {

  case R.id.play://来自播放按钮

  filename = filenameText.getText().toString();

  play();

  break;

  case R.id.pause://来自暂停按钮

  if(mediaPlayer.isPlaying()){

  mediaPlayer.pause();

  }else{

  mediaPlayer.start();

  }

  break;

 

  case R.id.reset://来自重新播放按钮

  if(!mediaPlayer.isPlaying()) play();

  mediaPlayer.seekTo(0);

  break;

 

  case R.id.stop://来自停止按钮

  if(mediaPlayer.isPlaying())mediaPlayer.stop();

  break; 

  }

  } catch (Exception e) {

  Log.e(TAG,e.toString());

  }

  }

    }

    /**

     * 播放视频

     */

    private void play() throws IOException {

  mediaPlayer.reset();

  mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

  mediaPlayer.setDataSource("/mnt/sdcard/"+ filename);//设置需要播放的视频

  mediaPlayer.setDisplay(surfaceView.getHolder());//把视频画面输出到SurfaceView

  mediaPlayer.prepare();

  mediaPlayer.start();

    }

 

    private class SurfaceListener implementsSurfaceHolder.Callback{

  @Override

  public void surfaceChanged(SurfaceHolder holder,int format, int width, int height) {

  }

  @Override

  public void surfaceCreated(SurfaceHolder holder) {//方法在onResume()后被调用

  Log.i(TAG, "surfaceCreated()");

  if(position>0 && filename!=null){

  try {

  play();

  mediaPlayer.seekTo(position);

  position = 0;

  } catch (Exception e) {

  Log.e(TAG,e.toString());

  }

  }

  }

  @Override

  public void surfaceDestroyed(SurfaceHolder holder) {

  Log.i(TAG, "surfaceDestroyed()");

  }     

    }

   

    @Override

    protected void onPause() {//当其他Activity被打开，停止播放

  if(mediaPlayer.isPlaying()){

  position = mediaPlayer.getCurrentPosition();//得到播放位置

  mediaPlayer.stop();

  }

  super.onPause();

    } 

   

    @Override

    protected void onDestroy() {

  if(mediaPlayer.isPlaying())mediaPlayer.stop();

  mediaPlayer.release();

  super.onDestroy();

    }

}

<?xml version="1.0" encoding="utf-8"?>

<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"

    android:background="#FFFFFF"

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    >

<TextView 

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:text="@string/filename"

    />

 <EditText 

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:text="oppo.mp4"

    android:id="@+id/filename"

    />

  <LinearLayout

     android:orientation="horizontal"

     android:layout_width="fill_parent"

     android:layout_height="wrap_content"

    >

  <ImageButton

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:src="@drawable/play"

    android:id="@+id/play"

    />

<ImageButton

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:src="@drawable/pause"

    android:id="@+id/pause"

    />

<ImageButton

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:src="@drawable/reset"

    android:id="@+id/reset"

    />

<ImageButton

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:src="@drawable/stop"

    android:id="@+id/stop"

    />

  </LinearLayout>

  <SurfaceView

    android:layout_width="fill_parent"

    android:layout_height="240dip"

    android:id="@+id/surfaceView"

    />

</LinearLayout>