Android 音乐播放器
自己在教材基础音乐播放器上做的一些扩展，整理一下以备后用，功能比较简单，包括播放列表，播放列表点击功能，进度条，循环播放等。喜欢的可以参考，写的比较乱，不好意思了。参考资料为《Google Android SDK开发范例大全》
读取sdCard中歌曲的类
import java.io.IOException;
import java.util.List;
import android.app.Activity;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.SeekBar;
import android.widget.TextView;
public class MyMusicPlayer extends Activity
{
private ImageButton mPause, mNext, mBefore, mStart, mStop;
private TextView mTextView1;
private ImageView mImageView1;
private boolean bIsReleased = false;
private boolean bIsPaused = false;
public SeekBar seekBr;
public ListView musics;
public MediaPlayer myPlayer1 = new MediaPlayer();
public int musicIndex = 0;
private String _DIR = "/sdcard/";
private List<String> musicList = FindMusics.getSD();
private int count = musicList.size();
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mStart = (ImageButton) findViewById(R.id.myImageButton1);
mStop = (ImageButton) findViewById(R.id.myImageButton2);
mPause = (ImageButton) findViewById(R.id.pause);
mNext = (ImageButton) findViewById(R.id.next);
mBefore = (ImageButton) findViewById(R.id.before);
mImageView1 = (ImageView) findViewById(R.id.myImageView1);
mTextView1 = (TextView) findViewById(R.id.myTextView1);
seekBr = (SeekBar) findViewById(R.id.seekb);
musics = (ListView) findViewById(R.id.musicList);
ArrayAdapter< String> adapter = new ArrayAdapter< String>(
this,
android.R.layout.simple_list_item_1);
for(int i = 0; i < count; i++){
adapter.add(musicList.get(i).toString());
}
musics.setAdapter(adapter);
musics.setOnItemClickListener(new AdapterView.OnItemClickListener(){
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3)
{
startMusic(arg2);
}
});
seekBr.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener(){
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser)
{
// TODO Auto-generated method stub
}
public void onStartTrackingTouch(SeekBar seekBar)
{
// TODO Auto-generated method stub
}
public void onStopTrackingTouch(SeekBar seekBar)
{
// TODO Auto-generated method stub
myPlayer1.seekTo(seekBr.getProgress());
}
});
/*秨﹍秙 */
mStart.setOnClickListener(new ImageButton.OnClickListener()
{
public void onClick(View v)
{
// TODO Auto-generated method stub
mStart.setImageResource(R.drawable.stars);
mImageView1.setImageResource(R.drawable.dance);
mPause.setImageResource(R.drawable.pause);
startMusic(musicIndex);
process();
myPlayer1.setOnCompletionListener(new OnCompletionListener()
{
// @Override
public void onCompletion(MediaPlayer arg0)
{
mTextView1.setText(R.string.str_finished);
mStart.setImageResource(R.drawable.star);
if(musicIndex >= count -1 ){
musicIndex = 0;
}else{
musicIndex ++;
}
myPlayer1.reset();
startMusic(musicIndex);
process();
mTextView1.setText(musicList.get(musicIndex).toString());
}
});
}
});
mPause.setOnClickListener(new ImageButton.OnClickListener()
{
public void onClick(View view)
{
if (myPlayer1 != null)
{
if(bIsReleased == false)
{
if(bIsPaused==false)
{
myPlayer1.pause();
bIsPaused = true;
mTextView1.setText(R.string.str_pause);
mStart.setImageResource(R.drawable.star);
mPause.setImageResource(R.drawable.pause_2);
}
else if(bIsPaused==true)
{
myPlayer1.start();
bIsPaused = false;
mTextView1.setText(R.string.str_start);
mStart.setImageResource(R.drawable.stars);
mPause.setImageResource(R.drawable.pause);
}
}
}
}
});
mNext.setOnClickListener(new ImageButton.OnClickListener()
{
public void onClick(View arg0)
{
// TODO Auto-generated method stub
mStart.setImageResource(R.drawable.stars);
mImageView1.setImageResource(R.drawable.dance);
if(musicIndex >= count-1){
musicIndex = 0;
}else{
musicIndex++;
}
startMusic(musicIndex);
process();
}
});
mBefore.setOnClickListener(new ImageButton.OnClickListener()
{
public void onClick(View arg0)
{
// TODO Auto-generated method stub
mStart.setImageResource(R.drawable.stars);
mImageView1.setImageResource(R.drawable.dance);
startMusic(musicIndex);
process();
}
});
mStop.setOnClickListener(new ImageButton.OnClickListener()
{
public void onClick(View v)
{
// TODO Auto-generated method stub
if(myPlayer1.isPlaying()==true)
{
myPlayer1.reset();
mTextView1.setText(R.string.str_stopped);
mStart.setImageResource(R.drawable.star);
mPause.setImageResource(R.drawable.pause);
mImageView1.setImageResource(R.drawable.black);
}
}
});
}
public void process(){
seekBr.setMax(myPlayer1.getDuration());
new Thread(new Runnable(){
public void run() {
while(true){
seekBr.setProgress(myPlayer1.getCurrentPosition()); //获得当前播放的进度值
if(seekBr.getMax() == myPlayer1.getCurrentPosition()){
seekBr.setProgress(0);
}
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}}).start();
}
public void startMusic(int musicIndex){
try
{
if(myPlayer1.isPlaying()==true)
{
myPlayer1.reset();
}
myPlayer1.setDataSource(_DIR + musicList.get(musicIndex).toString());
myPlayer1.prepare();
myPlayer1.start();
mTextView1.setText(musicList.get(musicIndex).toString());
}
catch (IllegalStateException e)
{
// TODO Auto-generated catch block
mTextView1.setText(e.toString());
e.printStackTrace();
}
catch (IOException e)
{
// TODO Auto-generated catch block
mTextView1.setText(e.toString());
e.printStackTrace();
}
}
}
读取sdCard中歌曲的类
import java.io.File;
import java.util.ArrayList;
import java.util.List;
public class FindMusics
{
public static List<String> getSD()
{
List<String> musicList = new ArrayList<String>();
File f = new File("/sdcard");
File[] files = f.listFiles();
for (int i = 0; i < files.length; i++)
{
File file = files[i];
if (getMusicFile(file.getName()))
{
musicList.add(file.getName());
}
}
return musicList;
}
public static boolean getMusicFile(String path)
{
// boolean rs;
String end = path.substring(path.lastIndexOf(".") + 1, path.length())
.toLowerCase();
if (end.equals("mp3"))
return true;
else
return false;
}
}
main.xml <?xml version="1.0" encoding="utf-8"?> <AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <!-- 建立一個TextView --> <TextView android:id="@+id/myTextView1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_y="236px" android:text="@string/hello" /> <!-- 建立第一個ImageButton --> <ImageButton android:id="@+id/myImageButton1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_x="111px" android:layout_y="206px" android:background="@drawable/black" android:src="@drawable/star" /> <!-- 建立第二個ImageButton --> <ImageButton android:id="@+id/pause" android:layout_height="wrap_content" android:layout_width="wrap_content" android:background="@drawable/black" android:layout_x="141px" android:layout_y="206px" android:src="@drawable/pause" /> <!-- 建立第三個ImageButton --> <ImageButton android:id="@+id/before" android:layout_height="wrap_content" android:layout_width="wrap_content" android:background="@drawable/black" android:layout_x="61px" android:layout_y="206px" android:src="@drawable/before" /> <!-- 建立第四個ImageButton --> <ImageButton android:id="@+id/next" android:layout_height="wrap_content" android:layout_width="wrap_content" android:background="@drawable/black" android:layout_x="181px" android:layout_y="206px" android:src="@drawable/next" /> <!-- 建立第五個ImageButton --> <ImageButton android:id="@+id/myImageButton2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_x="206px" android:layout_y="206px" android:background="@drawable/black" android:src="@drawable/stop" /> <!-- 建立一個ImageView --> <ImageView android:id="@+id/myImageView1" android:layout_width="207px" android:layout_height="170px" android:layout_x="72px" android:layout_y="32px" /> <SeekBar android:id="@+id/seekb" android:max="100" android:layout_width="fill_parent" android:layout_height="wrap_content" /> <ListView android:id="@+id/musicList" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_y="260px" /> </AbsoluteLayout>