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
		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;
	}
}

 

评论

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