android:music

　　　

package com.terry;

import java.io.File;
import java.io.FileFilter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import android.app.ListActivity;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;

public class myActivity2 extends ListActivity implements OnClickListener {
    Button play;
    Button pause;
    Button next;
    Button last;
    // ListView listViews;
    List<String> list;
    MediaPlayer mediaplayer;
    String PATH_ROOT = "/sdcard/";
    //当前项目名称
    String CURRENT_ITME = "";
    //当前位置
    int CURRENT_POSITON = 0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        // Intent intent = new Intent();
        setContentView(R.layout.main2);

        initViews();
        initListViews();
        mediaplayer = new MediaPlayer();
    }

    private void initViews() {
        // TODO Auto-generated method stub
        play = (Button) findViewById(R.id.start2);
        pause = (Button) findViewById(R.id.pause2);
        next = (Button) findViewById(R.id.next2);
        last = (Button) findViewById(R.id.last2);
        play.setOnClickListener(this);
        pause.setOnClickListener(this);
        next.setOnClickListener(this);
        last.setOnClickListener(this);
    }

    private void initListViews() {
        // 初始化ListViews
        // listViews
        list = new ArrayList<String>();
        ArrayAdapter<String> musiclistadapter;
        File file = new File(PATH_ROOT);
        if (file != null) {
            if (file.isDirectory()) {
                File[] listfiles = file.listFiles();
                if (listfiles != null) {
                    for (int i = 0; i < listfiles.length; i++) {
                        String name = listfiles[i].getName();
                        if (name.endsWith(".mp3")) {
                            list.add(name);
                        }
                    }
                }
            }
        }
        musiclistadapter = new ArrayAdapter<String>(this, R.layout.musicitme,
                list);
        setListAdapter(musiclistadapter);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
        case R.id.start2:
            // mediaplayer.p
            playMusic(PATH_ROOT + CURRENT_ITME);

            break;

        case R.id.pause2:
            if (mediaplayer.isPlaying()) {
                mediaplayer.pause();
            } else {
                Toast.makeText(this, "没有正在播放的音乐,我自动播放咯。。。。", 100).show();
                playMusic(PATH_ROOT + CURRENT_ITME);
            }
            break;
        case R.id.next2:
            System.out.println("xiayishou....");
            CURRENT_POSITON += 1;
            CURRENT_ITME = list.get(CURRENT_POSITON);
            playMusic(PATH_ROOT + CURRENT_ITME);
            System.out.println("path:" + PATH_ROOT + CURRENT_ITME);
            Toast.makeText(this, "下一首音乐,path:" + PATH_ROOT + CURRENT_ITME, 100)
                    .show();
            break;
        case R.id.last2:
            System.out.println("shangyishou....");
            CURRENT_POSITON -= 1;
            CURRENT_ITME = list.get(CURRENT_POSITON);
            playMusic(PATH_ROOT + CURRENT_ITME);
            System.out.println("path:" + PATH_ROOT + CURRENT_ITME);
            Toast.makeText(this, "shang一首音乐,path:" + PATH_ROOT + CURRENT_ITME, 100)
                    .show();
            break;
        }
    }

    private void playMusic(String path) {
        mediaplayer.reset();
        try {
            mediaplayer.setDataSource(path);
            mediaplayer.prepare();
            mediaplayer.start();
            mediaplayer
                    .setOnCompletionListener(new myOnCompleteMusicListener());
        } catch (IllegalArgumentException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (SecurityException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IllegalStateException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

    public class myOnCompleteMusicListener implements OnCompletionListener {

        @Override
        public void onCompletion(MediaPlayer mp) {
            // TODO
            // playMusic(P);
        }

    }

    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {
        // TODO Auto-generated method stub
        super.onListItemClick(l, v, position, id);
        CURRENT_POSITON = position;
        CURRENT_ITME = list.get(position);//获取当前位置的String字符串，即文件名
        playMusic(PATH_ROOT + CURRENT_ITME);
        Toast.makeText(this, "PATH:" + PATH_ROOT + CURRENT_ITME, 100).show();
        System.out.println("path:" + PATH_ROOT + CURRENT_ITME);
    }

}