Android 的 MediaPlayer 多媒体播放器

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代码片段(3)

[图片] 程序截图

[代码] main.xml

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

02	<LinearLayout android:id="@+id/LinearLayout01"

03	android:layout_width="fill_parent" android:layout_height="fill_parent"

04	xmlns:android="http://schemas.android.com/apk/res/android"

05	android:orientation="vertical">

06	<SeekBar android:id="@+id/SeekBar01" android:layout_height="wrap_content"

07	android:layout_width="fill_parent"></SeekBar>

08	<LinearLayout android:id="@+id/LinearLayout02"

09	android:layout_width="wrap_content" android:layout_height="wrap_content">

10	<Button android:id="@+id/Button01" android:layout_width="wrap_content"

11	android:layout_height="wrap_content" android:text="播放音频"></Button>

12	<Button android:id="@+id/Button02" android:layout_width="wrap_content"

13	android:layout_height="wrap_content" android:text="停止播放"></Button>

14	</LinearLayout>

15	<SeekBar android:id="@+id/SeekBar02" android:layout_height="wrap_content"

16	android:layout_width="fill_parent"></SeekBar>

17

18	<SurfaceView android:id="@+id/SurfaceView01"

19	android:layout_width="fill_parent" android:layout_height="250px"></SurfaceView>

20	<LinearLayout android:id="@+id/LinearLayout02"

21	android:layout_width="wrap_content" android:layout_height="wrap_content">

22	<Button android:layout_width="wrap_content"

23	android:layout_height="wrap_content" android:id="@+id/Button03"

24	android:text="播放视频"></Button>

25	<Button android:layout_width="wrap_content"

26	android:layout_height="wrap_content" android:text="停止播放" android:id="@+id/Button04"></Button>

27	</LinearLayout>

28	</LinearLayout>

[代码] TestMedia.java

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001	package com.testMedia;

002

003	import java.io.IOException;

004	import java.util.Timer;

005	import java.util.TimerTask;

006	import android.app.Activity;

007	import android.media.AudioManager;

008	import android.media.MediaPlayer;

009	import android.os.Bundle;

010	import android.view.SurfaceHolder;

011	import android.view.SurfaceView;

012	import android.view.View;

013	import android.widget.Button;

014	import android.widget.SeekBar;

015	import android.widget.Toast;

016

017

018	public class TestMedia extends Activity {

019	/** Called when the activity is first created. */

020

021	private SeekBar skb_audio=null;

022	private Button btn_start_audio = null;

023	private Button btn_stop_audio = null;

024

025	private SeekBar skb_video=null;

026	private Button btn_start_video = null;

027	private Button btn_stop_video = null;

028	private SurfaceView surfaceView;

029	private SurfaceHolder surfaceHolder;

030

031	private MediaPlayer m = null;

032	private Timer mTimer;

033	private TimerTask mTimerTask;

034

035	private boolean isChanging=false;//互斥变量，防止定时器与SeekBar拖动时进度冲突

036

@Override

037	public void onCreate(Bundle savedInstanceState) {

038	super.onCreate(savedInstanceState);

039	setContentView(R.layout.main);

040

041	//----------Media控件设置---------//

042	m=new MediaPlayer();

043

044	//播放结束之后弹出提示

045	m.setOnCompletionListener(new MediaPlayer.OnCompletionListener(){

046

@Override

047	public void onCompletion(MediaPlayer arg0) {

048	Toast.makeText(testMedia.this, "结束", 1000).show();

049	m.release();

050

}

051

});

052

053	//----------定时器记录播放进度---------//

054	mTimer = new Timer();

055	mTimerTask = new TimerTask() {

056

@Override

057	public void run() {

058	if(isChanging==true)

059

return;

060

061	if(m.getVideoHeight()==0)

062	skb_audio.setProgress(m.getCurrentPosition());

063

else

064	skb_video.setProgress(m.getCurrentPosition());

065

}

066

};

067

068	mTimer.schedule(mTimerTask, 0, 10);

069

070	btn_start_audio = (Button) this.findViewById(R.id.Button01);

071	btn_stop_audio = (Button) this.findViewById(R.id.Button02);

072	btn_start_audio.setOnClickListener(new ClickEvent());

073	btn_stop_audio.setOnClickListener(new ClickEvent());

074	skb_audio=(SeekBar)this.findViewById(R.id.SeekBar01);

075	skb_audio.setOnSeekBarChangeListener(new SeekBarChangeEvent());

076

077	btn_start_video = (Button) this.findViewById(R.id.Button03);

078	btn_stop_video = (Button) this.findViewById(R.id.Button04);

079	btn_start_video.setOnClickListener(new ClickEvent());

080	btn_stop_video.setOnClickListener(new ClickEvent());

081	skb_video=(SeekBar)this.findViewById(R.id.SeekBar02);

082	skb_video.setOnSeekBarChangeListener(new SeekBarChangeEvent());

083	surfaceView = (SurfaceView) findViewById(R.id.SurfaceView01);

084	surfaceHolder = surfaceView.getHolder();

085	surfaceHolder.setFixedSize(100, 100);

086	surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

087

}

088

089

/**

090

* 按键事件处理

091

*/

092	class ClickEvent implements View.OnClickListener{

093

@Override

094	public void onClick(View v) {

095	if(v==btn_start_audio)

096

{

097	m.reset();//恢复到未初始化的状态

098	m=MediaPlayer.create(testMedia.this, R.raw.big);//读取音频

099	skb_audio.setMax(m.getDuration());//设置SeekBar的长度

100

try {

101	m.prepare();    //准备

102	} catch (IllegalStateException e) {

103	// TODO Auto-generated catch block

104	e.printStackTrace();

105	} catch (IOException e) {

106	// TODO Auto-generated catch block

107	e.printStackTrace();

108

}

109	m.start();  //播放

110

}

111	else if(v==btn_stop_audio || v==btn_stop_video)

112

{

113

m.stop();

114

}

115	else if(v==btn_start_video)

116

{

117	m.reset();//恢复到未初始化的状态

118	m=MediaPlayer.create(testMedia.this, R.raw.test);//读取视频

119	skb_video.setMax(m.getDuration());//设置SeekBar的长度

120	m.setAudioStreamType(AudioManager.STREAM_MUSIC);

121	m.setDisplay(surfaceHolder);//设置屏幕

122

123

try {

124	m.prepare();

125

126	} catch (IllegalArgumentException e) {

127	// TODO Auto-generated catch block

128	e.printStackTrace();

129	} catch (IllegalStateException e) {

130	// TODO Auto-generated catch block

131	e.printStackTrace();

132	} catch (IOException e) {

133	// TODO Auto-generated catch block

134	e.printStackTrace();

135

}

136	m.start();

137

}

138

}

139

}

140

141

/**

142	* SeekBar进度改变事件

143

*/

144	class SeekBarChangeEvent implements SeekBar.OnSeekBarChangeListener{

145

146

@Override

147	public void onProgressChanged(SeekBar seekBar, int progress,

148	boolean fromUser) {

149	// TODO Auto-generated method stub

150

151

}

152

153

@Override

154	public void onStartTrackingTouch(SeekBar seekBar) {

155	isChanging=true;

156

}

157

158

@Override

159	public void onStopTrackingTouch(SeekBar seekBar) {

160	m.seekTo(seekBar.getProgress());

161	isChanging=false;

162

}

163

164

}

165

166

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