Android音乐播放器【安卓进化二十】

今日看书，看到这个播放器，我就写了个例子，感觉还行，这个播放器能播放后缀是。MP3的音乐，这个例子在main.xml设置listView的时候，注意：android:id="@+id/android:list"的设置，否则程序会报错，说找不到listview。这个效果还是不错的。可以当做是简单的音乐播放器，可以读取sdcard里面后缀是。MP3的歌曲。有问题可以留言，想要源码可以留言，这个代码比较简单。转载请标明出处：

http://blog.csdn.net/wdaming1986/article/details/6768884

csdn资源下载链接地址：http://download.csdn.net/detail/wdaming1986/3611735

看程序效果图：可以点击每首歌播放，

也可以用下面的按钮：修改后的程序加了滚动条了

代码说明一切：

一、MainActivity。java类中的代码：

[java] view plain copy print ?

packagecom.cn.daming;
importjava.io.File;
importjava.io.FilenameFilter;
importjava.io.IOException;
importjava.util.ArrayList;
importjava.util.List;
importandroid.app.ListActivity;
importandroid.graphics.Color;
importandroid.graphics.drawable.GradientDrawable;
importandroid.graphics.drawable.GradientDrawable.Orientation;
importandroid.media.MediaPlayer;
importandroid.media.MediaPlayer.OnCompletionListener;
importandroid.os.Bundle;
importandroid.os.Handler;
importandroid.view.KeyEvent;
importandroid.view.View;
importandroid.view.View.OnClickListener;
importandroid.widget.ArrayAdapter;
importandroid.widget.ImageButton;
importandroid.widget.ListView;
importandroid.widget.SeekBar;
importandroid.widget.SeekBar.OnSeekBarChangeListener;
importandroid.widget.TextView;
publicclassMainActivityextendsListActivity{
privateImageButtonmFrontImageButton=null;
privateImageButtonmStopImageButton=null;
privateImageButtonmStartImageButton=null;
privateImageButtonmPauseImageButton=null;
privateImageButtonmNextImageButton=null;
/*定义进度handler，显示百分比进度*/
HandlermPercentHandler=newHandler();
privateSeekBarmSeekBar=null;
privateTextViewcurProgressText=null;
privateTextViewcurtimeAndTotaltime=null;
publicMediaPlayermMediaPlayer;
privateList<String>mMusicList=newArrayList<String>();
privateintcurrentListItem=0;
privatestaticfinalStringMUSIC_PATH=newString("/sdcard/");
@Override
publicvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
drawBackground();
setContentView(R.layout.main);
musicList();
mMediaPlayer=newMediaPlayer();
initmFrontMusic();
initStopMusic();
initStartMusic();
initPauseMusic();
initNextMusic();
initSeekBar();
}
publicvoiddrawBackground()
{
GradientDrawablegrad=newGradientDrawable(
Orientation.TL_BR,
newint[]{
Color.rgb(0,0,127),
Color.rgb(0,0,255),
Color.rgb(127,0,255),
Color.rgb(127,127,255),
Color.rgb(127,255,255),
Color.rgb(255,255,255)
}
);
this.getWindow().setBackgroundDrawable(grad);
}
publicvoidinitmFrontMusic()
{
mFrontImageButton=(ImageButton)findViewById(R.id.front_button);
mFrontImageButton.setOnClickListener(newOnClickListener(){
publicvoidonClick(Viewarg0){
if(--currentListItem>=0){
currentListItem=mMusicList.size();
}else{
playMusic(MUSIC_PATH+mMusicList.get(currentListItem));
}
}
});
}
publicvoidinitStopMusic()
{
mStopImageButton=(ImageButton)findViewById(R.id.stop_button);
mStopImageButton.setOnClickListener(newOnClickListener(){
publicvoidonClick(Viewarg0){
if(mMediaPlayer.isPlaying())
{
mMediaPlayer.reset();
}
}
});
}
publicvoidinitStartMusic()
{
mStartImageButton=(ImageButton)findViewById(R.id.start_button);
mStartImageButton.setOnClickListener(newOnClickListener(){
publicvoidonClick(Viewarg0){
playMusic(MUSIC_PATH+mMusicList.get(currentListItem));
startSeekBarUpdate();
}
});
}
publicvoidinitPauseMusic()
{
mPauseImageButton=(ImageButton)findViewById(R.id.pause_button);
mPauseImageButton.setOnClickListener(newOnClickListener(){
publicvoidonClick(Viewarg0){
if(mMediaPlayer.isPlaying()){
mMediaPlayer.pause();
}
else{
mMediaPlayer.start();
}
}
});
}
publicvoidinitNextMusic()
{
mNextImageButton=(ImageButton)findViewById(R.id.next_button);
mNextImageButton.setOnClickListener(newOnClickListener(){
publicvoidonClick(Viewarg0){
nextMusic();
}
});
}
publicvoidinitSeekBar()
{
/*初始化拖动条和当前进度显示值*/
mSeekBar=(SeekBar)findViewById(R.id.SeekBar01);
curProgressText=(TextView)findViewById(R.id.currentProgress);
curtimeAndTotaltime=(TextView)findViewById(R.id.curtimeandtotaltime);
mSeekBar.setOnSeekBarChangeListener(newOnSeekBarChangeListener(){
publicvoidonProgressChanged(SeekBarseekBar,intprogress,
booleanfromUser){
/*如果拖动进度发生改变，则显示当前进度值*/
curProgressText.setText("当前进度:"+progress);
}
publicvoidonStartTrackingTouch(SeekBararg0){
curProgressText.setText("拖动中...");
}
publicvoidonStopTrackingTouch(SeekBararg0){
intdest=mSeekBar.getProgress();
intmMax=mMediaPlayer.getDuration();
intsMax=mSeekBar.getMax();
mMediaPlayer.seekTo(mMax*dest/sMax);
}
});
}
privatevoidplayMusic(Stringpath)
{
try{
mMediaPlayer.reset();
mMediaPlayer.setDataSource(path);
mMediaPlayer.prepare();
mMediaPlayer.start();
mMediaPlayer.setOnCompletionListener(newOnCompletionListener(){
publicvoidonCompletion(MediaPlayerarg0){
nextMusic();
}
});
}catch(IOExceptione){
e.printStackTrace();
}
}
privatevoidnextMusic()
{
if(++currentListItem>=mMusicList.size())
{
currentListItem=0;
}
else
{
playMusic(MUSIC_PATH+mMusicList.get(currentListItem));
}
}
@Override
publicbooleanonKeyDown(intkeyCode,KeyEventevent){
if(keyCode==KeyEvent.KEYCODE_BACK){
mMediaPlayer.stop();
mMediaPlayer.release();
}
returnsuper.onKeyDown(keyCode,event);
}
@Override
protectedvoidonListItemClick(ListViewl,Viewv,intposition,longid){
currentListItem=position;
playMusic(MUSIC_PATH+mMusicList.get(position));
super.onListItemClick(l,v,position,id);
}
//播放列表
publicvoidmusicList()
{
Filehome=newFile(MUSIC_PATH);
if(home.listFiles(newMusicFilter()).length>0)
{
for(Filefile:home.listFiles(newMusicFilter()))
{
mMusicList.add(file.getName());
}
ArrayAdapter<String>musicList=newArrayAdapter<String>(MainActivity.this,R.layout.musicitem,mMusicList);
setListAdapter(musicList);
}
}
/*更新拖动条进度*/
publicvoidstartSeekBarUpdate(){
mPercentHandler.post(start);
}
Runnablestart=newRunnable(){
publicvoidrun(){
//用一个handler更新SeekBar
mPercentHandler.post(updatesb);
}
};
Runnableupdatesb=newRunnable(){
publicvoidrun(){
intposition=mMediaPlayer.getCurrentPosition();
intmMax=mMediaPlayer.getDuration();
intsMax=mSeekBar.getMax();
mSeekBar.setProgress(position*sMax/mMax);
curtimeAndTotaltime.setText("当前播放时间："+position/1000+"秒"
+"\n歌曲总时间:"+mMax/1000+"秒");
//每秒钟更新一次
mPercentHandler.postDelayed(updatesb,1000);
}
};
//过滤文件类型
classMusicFilterimplementsFilenameFilter
{
publicbooleanaccept(Filedir,Stringname){
//这里还可以设置其他格式的音乐文件
return(name.endsWith(".mp3"));
}
}
}

二、main。xml布局文件的代码：

[html] view plain copy print ?

<spanstyle="font-size:13px;color:#000000;"><?xmlversion="1.0"encoding="utf-8"?>
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="25dip"
android:paddingTop="5dip"
android:layout_gravity="center_horizontal"
android:gravity="center_horizontal"
android:textColor="#FF000000"
android:text="大明制作Mp3播放器"
/>
<ListView
android:id="@+id/android:list"
android:layout_width="fill_parent"
android:layout_height="200dip"
android:layout_weight="1"
android:drawSelectorOnTop="false"
/>
<SeekBar
android:id="@+id/SeekBar01"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:max="100"
android:progress="0"
android:secondaryProgress="0"
android:visibility="visible"
/>
<TextView
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:id="@+id/currentProgress"
/>
<TextView
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:layout_y="300dp"
android:id="@+id/curtimeandtotaltime"
/>
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
>
<ImageButton
android:id="@+id/front_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/first1"
android:layout_marginLeft="10dip"
/>
<ImageButton
android:id="@+id/stop_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/stop1"
android:layout_marginLeft="10dip"
/>
<ImageButton
android:id="@+id/start_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/start1"
android:layout_marginLeft="10dip"
/>
<ImageButton
android:id="@+id/pause_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/pose1"
android:layout_marginLeft="10dip"
/>
<ImageButton
android:id="@+id/next_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/next1"
android:layout_marginLeft="10dip"
/>
</LinearLayout>
</LinearLayout>
</span>

三、musicitem.xml布局文件的代码：

[html] view plain copy print ?

<?xmlversion="1.0"encoding="utf-8"?>
<TextViewxmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/TextView01"
android:layout_width="fill_parent"
android:layout_height="26dip"
android:layout_gravity="center_vertical"
android:paddingTop="5dip"
android:paddingLeft="20dip"
android:textColor="#FF000000"
android:text="@string/hello1"/>

四、Manifest。xml文件

[html] view plain copy print ?

<spanstyle="font-size:13px;color:#000000;"><?xmlversion="1.0"encoding="utf-8"?>
<manifestxmlns:android="http://schemas.android.com/apk/res/android"
package="com.cn.daming"
android:versionCode="1"
android:versionName="1.0">
<uses-sdkandroid:minSdkVersion="8"/>
<applicationandroid:icon="@drawable/icon"android:label="@string/app_name">
<activityandroid:name=".MainActivity"
android:label="@string/app_name">
<intent-filter>
<actionandroid:name="android.intent.action.MAIN"/>
<categoryandroid:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>
</manifest></span>

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