Android的MediaPlayer多媒体播放器.doc

Android 的 MediaPlayer 多媒体播放器MediaPlayer 可以播放音频和视频，另外也可以通过VideoView来播放视频，虽然VideoView比MediaPlayer简单易用，但定制性不如用 MediaPlayer，要视情况选择了。MediaPlayer播放音频比较简单，但是要播放视频就需要SurfaceView。 SurfaceView比普通的自定义View更有绘图上的优势，它支持完全的OpenGL ES库。 标签： MediaPlayer SurfaceView Android SDK 代码片段(3)图片 程序截图代码 main.xmlview source print?01 02 06 08 10 12 14 15 1718 20 22 25 27 28代码 TestMedia.javaview source print?001package com.testMedia; 002003import java.io.IOException; 004import java.util.Timer; 005import java.util.TimerTask; 006import android.app.Activity; 007import android.media.AudioManager; 008import android.media.MediaPlayer; 009import android.os.Bundle; 010import android.view.SurfaceHolder; 011import android.view.SurfaceView; 012import android.view.View; 013import android.widget.Button; 014import android.widget.SeekBar; 015import android.widget.Toast; 016017018public class TestMedia extends Activity 019/* Called when the activity is first created. */020021private SeekBar skb_audio=null; 022private Button btn_start_audio = null; 023private Button btn_stop_audio = null; 024025private SeekBar skb_video=null; 026private Button btn_start_video = null; 027private Button btn_stop_video = null; 028private SurfaceView surfaceView; 029private SurfaceHolder surfaceHolder; 030031private MediaPlayer m = null; 032private Timer mTimer; 033private TimerTask mTimerTask; 034035private boolean isChanging=false;/互斥变量，防止定时器与SeekBar拖动时进度冲突 036Override037public void onCreate(Bundle savedInstanceState) 038super.onCreate(savedInstanceState); 039setContentView(R.layout.main); 040041/-Media控件设置-/ 042m=new MediaPlayer(); 043044/播放结束之后弹出提示 045m.setOnCompletionListener(new MediaPlayer.OnCompletionListener() 046Override047public void onCompletion(MediaPlayer arg0) 048Toast.makeText(testMedia.this, 结束, 1000).show(); 049m.release(); 050 051); 052053/-定时器记录播放进度-/ 054mTimer = new Timer(); 055mTimerTask = new TimerTask() 056Override057public void run() 058if(isChanging=true) 059return; 060061if(m.getVideoHeight()=0) 062skb_audio.setProgress(m.getCurrentPosition(); 063else064skb_video.setProgress(m.getCurrentPosition(); 065 066; 067068mTimer.schedule(mTimerTask, 0, 10); 069070btn_start_audio = (Button) this.findViewById(R.id.Button01); 071btn_stop_audio = (Button) this.findViewById(R.id.Button02); 072btn_start_audio.setOnClickListener(new ClickEvent(); 073btn_stop_audio.setOnClickListener(new ClickEvent(); 074skb_audio=(SeekBar)this.findViewById(R.id.SeekBar01); 075skb_audio.setOnSeekBarChangeListener(new SeekBarChangeEvent(); 076077btn_start_video = (Button) this.findViewById(R.id.Button03); 078btn_stop_video = (Button) this.findViewById(R.id.Button04); 079btn_start_video.setOnClickListener(new ClickEvent(); 080btn_stop_video.setOnClickListener(new ClickEvent(); 081skb_video=(SeekBar)this.findViewById(R.id.SeekBar02); 082skb_video.setOnSeekBarChangeListener(new SeekBarChangeEvent(); 083surfaceView = (SurfaceView) findViewById(R.id.SurfaceView01); 084surfaceHolder = surfaceView.getHolder(); 085surfaceHolder.setFixedSize(100, 100); 086surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 087 088089/* 090* 按键事件处理 091*/092class ClickEvent implements View.OnClickListener 093Override094public void onClick(View v) 095if(v=btn_start_audio) 096 097m.reset();/恢复到未初始化的状态 098m=MediaPlayer.create(testMedia.this, R.raw.big);/读取音频 099skb_audio.setMax(m.getDuration();/设置SeekBar的长度 100try 101m.prepare(); /准备 102 catch (IllegalStateException e) 103/ TODO Auto-generated catch block 104e.printStackTrace(); 105 catch (IOException e) 106/ TODO Auto-generated catch block 107e.printStackTrace(); 108 109m.start(); /播放 110 111else if(v=btn_stop_audio | v=btn_stop_video) 112 113m.stop(); 114 115else if(v=btn_start_video) 116 117m.reset();/恢复到未初始化的状态 118m=MediaPlayer.create(testMedia.this, R.raw.test);/读取视频 119skb_video.setMax(m.getDuration();/设置SeekBar的长度 120m.setAudioStreamType(AudioManager.STREAM_MUSIC); 121m.setDisplay(surfaceHolder);/设置屏幕 122123try 124m.prepare(); 125126 catch (IllegalArgumentException e) 127/ TODO Auto-generated catch block 128e.printStackTrace(); 129 catch (IllegalStateException e) 130/ TODO Auto-generated catch block 131e.printStackTrace(); 132 catch (IOException e) 133/ TODO Auto-generated catch block 134e.printStackTrace(); 135 136m.start(); 137 138 139 140141/* 142* SeekBar进度改变事件 143*/144class SeekBarChangeEvent implements SeekBar.OnSeekBarChangeListener 145146Override147public void onProgressChanged(SeekBar seekBar, int progress, 148boolean fromUser) 149/ TODO Auto-generated method stub