android的音乐播放器 出了点有关问
题
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不知道是什么原因有时候出现死循环
android的音乐播放器 出了点问题不知道是什么原因，有时候出现死循环
12-17 12:04:26.415: INFO/StagefrightPlayer(34):
setDataSource('/mnt/sdcard/WonderGirls_TellMe.mp3')
12-17 12:04:26.415: ERROR/MediaPlayer(365): start called in state 2
12-17 12:04:26.415: ERROR/MediaPlayer(365): error (-38, 0)
12-17 12:04:26.415: ERROR/MediaPlayer(365): Error (-38,0)
12-17 12:04:26.425: WARN/InputManagerService(60): Starting input on non-focused client com.android.internal.view.IInputMethodClient$Stub$Proxy@43e388e8 (uid=10032 pid=365)
12-17 12:04:26.445: INFO/StagefrightPlayer(34):
setDataSource('/mnt/sdcard/Trouble is a friend.mp3')
12-17 12:04:26.445: ERROR/MediaPlayer(365): start called in state 2
12-17 12:04:26.445: ERROR/MediaPlayer(365): error (-38, 0)
12-17 12:04:26.445: ERROR/MediaPlayer(365): Error (-38,0)
12-17 12:04:26.455: WARN/InputManagerService(60): Starting input on non-focused client com.android.internal.view.IInputMethodClient$Stub$Proxy@43e388e8 (uid=10032 pid=365)
12-17 12:04:26.545: INFO/StagefrightPlayer(34): setDataSource('/mnt/sdcard/sweet dream.mp3')
12-17 12:04:26.675: ERROR/MediaPlayer(365): start called in state 2
12-17 12:04:26.675: ERROR/MediaPlayer(365): error (-38, 0)
12-17 12:04:26.675: ERROR/MediaPlayer(365): Error (-38,0)
12-17 12:04:26.685: WARN/InputManagerService(60): Starting input on non-focused client com.android.internal.view.IInputMethodClient$Stub$Proxy@43e388e8 (uid=10032 pid=365)
12-17 12:04:26.705: INFO/StagefrightPlayer(34):
setDataSource('/mnt/sdcard/WonderGirls_TellMe.mp3')
12-17 12:04:26.705: ERROR/MediaPlayer(365): start called in state 2
12-17 12:04:26.715: ERROR/MediaPlayer(365): error (-38, 0)
12-17 12:04:26.715: ERROR/MediaPlayer(365): Error (-38,0)
12-17 12:04:26.745: WARN/InputManagerService(60): Starting input on non-focused client com.android.internal.view.IInputMethodClient$Stub$Proxy@43e388e8 (uid=10032 pid=365)
12-17 12:04:26.755: INFO/StagefrightPlayer(34):
setDataSource('/mnt/sdcard/Trouble is a friend.mp3')
12-17 12:04:26.765: ERROR/MediaPlayer(365): start called in state 2
package fly.mediaplayer;
import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;
import android.app.Activity;
import android.media.MediaPlayer; import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.EditText; import android.widget.ListView; import android.widget.SeekBar;
import android.widget.SimpleAdapter; import android.widget.Toast;
/**
* 音乐播放器
* */
public class MainActivity extends Activity {
private ListView listView;
private EditText title;
SeekBar bar;// 进度条
private Map String, String listpath = new HashMap String, String ();// 存储音乐名称和绝对路径
MediaPlayer mediaPlayer = new MediaPlayer();
private Handler handler = new UIHandler();
private boolean pause;
AdapterView ? parent;
int position = -1;
int model = 0;// 播放模式 :0 随机 :1 顺序:2 单曲循环
List Map String, Object paths = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// 获得视图
listView = (ListView) this.findViewById(R.id.list);
title = (EditText) this.findViewById(R.id.title);
bar = (SeekBar) this.findViewById(R.id.lenghtBar);
Button pause = (Button) this.findViewById(R.id.pause);
Button reset = (Button) this.findViewById(R.id.reset);
Button stop = (Button) this.findViewById(R.id.stop);
Button down = (Button) this.findViewById(R.id.down);
Button up = (Button) this.findViewById(R.id.up);
Button model = (Button) this.findViewById(R.id.model);
// 按钮添加事件
pause.setOnClickListener(new ButtonClickListener());
reset.setOnClickListener(new ButtonClickListener());
stop.setOnClickListener(new ButtonClickListener());
down.setOnClickListener(new ButtonClickListener());
up.setOnClickListener(new ButtonClickListener());
model.setOnClickListener(new ButtonClickListener());
bar.setOnSeekBarChangeListener(new SeekBarChangeListener());
paths = getList();// 获得音乐文件列
表
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SimpleAdapter adapter = new SimpleAdapter(this, paths, R.layout.list,
new String[] { path , lenght }, new int[] { R.id.path,
R.id.lenght });
listView.setAdapter(adapter);
listView.setOnItemClickListener(new ListOnClickListener());// 添加点击事
件
new Thread(new BarThread()).start();
}
/**
* SeekBar重绘
* */
private class UIHandler extends Handler {
public void handleMessage(Message msg) {// 运行在主线程中
int size = msg.getData().getInt( seek );
bar.setProgress(size);
}
}
/**
* 进度条拖拉监听
* */
private class SeekBarChangeListener implements
SeekBar.OnSeekBarChangeListener {
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
if (mediaPlayer.isPlaying()) {
mediaPlayer.stop();
mediaPlayer.seekTo(seekBar.getProgress());
play();
}
}
}
/**
* 进度条线程
* */
private class BarThread implements Runnable {
public void run() {
bar.setMax(mediaPlayer.getDuration());
while (mediaPlayer.getCurrentPosition() = mediaPlayer
.getDuration()) {
Message ms = new Message();
ms.getData().putInt( seek , mediaPlayer.getCurrentPosition());
handler.sendMessage(ms);
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
/**
* 按钮事件监听器
* */
private final class ButtonClickListener implements OnClickListener {
@Override
public void onClick(View v) {
if (position = 0) {
switch (v.getId()) {
case R.id.pause:
pause();
break;
case R.id.reset:
reset();
break;
case R.id.stop:
stop();
break;
case R.id.down:
down();
break;
case R.id.up:
up();
break;
case R.id.model:
if (model == 0) {
model = 1;
((Button) v).setText(R.string.order);
} else if (model == 1) {
model = 2;
((Button) v).setText(R.string.loop);
} else {
model = 0;
((Button) v).setText(R.string.random);
}
break;
}
} else {
Toast.makeText(getApplicationContext(), R.string.choice,
Toast.LENGTH_LONG).show();
}
}
/**
* 下一首
* */
private void down() {
if (position + 1 paths.size()) {
position++;
initMediaplayer(parent, position);
play();
} else {
stop();
Toast.makeText(getApplicationContext(), R.string.last,
Toast.LENGTH_LONG).show();
}
}
/**
* 上一首
* */
private void up() {
if (position == 0) {
stop();
Toast.makeText(getApplicationContext(), R.string.first,
Toast.LENGTH_LONG).show();
} else {
position = position - 1;
initMediaplayer(parent, position);
play();
}
}
}
/**
* ListView点击事件监听器
* */
private final class ListOnClickListener implements OnItemClickListener {
@Override
public void onItemClick(AdapterView ? parent, View view, int position,
long id) {
initMediaplayer(parent, position);
mediaPlayer.setOnCompletionListener(new CompletionListener(parent,
position));
setViewAndPosition(parent, position);
play();// 播放
}
}
/**
* 存储当前的视图和位置
* */
private void setViewAndPosition(AdapterView ? parent, int position) {
this.parent = parent;
this.position = position;
}
/**
* 获得随即播放点
* */
private int getRandom(AdapterView ? parent, int position) {
position = new Random().nextInt(parent.getChildCount());
return position;
}
/**
* 获得顺序播放点
* */
private int getDown(AdapterView ? parent, int position) {
position += 1;
if (position parent.getChildCount() - 1) {
position = 0;
}
return position;
}
/**
* 播放完后 0.随即播放 1.顺序播放 2.单曲循环
* */
private class CompletionListener implements
MediaPlayer.OnCompletionListener {
private int position;
private AdapterView ? parent;
public CompletionListener(AdapterView ? parent, int position) {
super();
this.position = position;
this.parent = parent;
}
@Override
public void onCompletion(MediaPlayer mp) {
switch (model) {
case 0:
position = getRandom(parent, position);
break;
case 1:
position = getDown(parent, position);
break;
case 2:
break;
}
setViewAndPosition(parent, position);
initMediaplayer(parent, position);
play();
}
}
/**
* 初始化 MediaPlayer
* */
private void initMediaplayer(AdapterView ? parent, int position) {
@SuppressWarnings( unchecked )
Map String, String map = (Map String, String ) parent
.getItemAtPosition(position);
String path = map.get( path );// 获得触发事件的Item
title.setText(path);// 设置标题
String realPath = listpath.get(path);// 获得绝对路径
mediaPlayer.reset();
try {
mediaPlayer.setDataSource(realPath);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 重置
* */
private void reset() {
if (mediaPlayer.isPlaying()) {
mediaPlayer.seekTo(0);
} else {
if (title != null)
play();
}
}
/**
* 暂停
* */
private void pause() {
if (mediaPlayer.isPlaying()) {
mediaPlayer.pause();
pause = true;
} else {
play();
}
}
/**
* 停止
* */
private void stop() {
if (mediaPlayer.isPlaying()) {
mediaPlayer.stop();
pause = false;
}
}
/**
* 播放
* */
private void play() {
try {
if (!pause) {
mediaPlayer.prepare();
}
mediaPlayer.start();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 获取音乐列表
* */
private List Map String, Object getList() {
File file = new File(Environment.getExternalStorageDirectory()
.toString());// 获得SDCard
File[] files = file.listFiles();
int lenght = 0;
int m = 0;
int s = 0;
List Map String, Object list = new ArrayList Map String, Object ();
// 获得所有的音乐文件
for (File filepath : files) {
if (filepath.getName().endsWith( .mp3 )) {
Map String, Object lists = new HashMap String, Object ();
try {
mediaPlayer.reset();
mediaPlayer.setDataSource(filepath.toString());
mediaPlayer.prepare();
lenght = mediaPlayer.getDuration();
lenght = lenght / 1000;
m = lenght / 60;
s = lenght - m * 60;
} catch (Exception e) {
e.printStackTrace();
}
lists.put( path , filepath.getName());
lists.put(
lenght ,
String.format( %02d , m) + :
+ String.format( %02d , s));
list.add(lists);
listpath.put(filepath.getName(), filepath.toString());
}
}
return list;
}
}
1 楼 zhangxpower 2011-08-05
我也遇到了这个问题。。。不知道怎么解决 。。还是说 要用mediaplayer之前要在 manifest.xml中申请 权限啊,
抱着个错:start called in state 2
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