ex_musicPlayer-白红宇

ex_musicPlayer

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发布时间：2019-05-09

本文共 4870 字，大约阅读时间需要 16 分钟。

package com.ouling.ex_musicPlayer;import java.io.File;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;//import android.app.Activity;import android.app.ListActivity;import android.media.MediaPlayer;import android.media.MediaPlayer.OnCompletionListener;import android.os.Bundle;import android.view.*;import android.view.View.OnClickListener;import android.widget.*;public class ex_musicPlayer extends ListActivity {	// 播放对象	private MediaPlayer m_musicplayer;	// 播放列表	private List
   
     m_playlist = new ArrayList
    
     ();	// 当前播放索引位置	private int m_list_item = 0;	// 音乐路径	private static String m_musicpath = new String("/sdcard/");	public Button last;	public Button stop;	public Button start;	public Button pause;	public Button next;	/** Called when the activity is first created. */	@Override	public void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.main);		m_musicplayer = new MediaPlayer();		findView();// 获取按钮		musicList();// 获取播放列表		listener();// 监听	}	private void listener() {		// TODO Auto-generated method stub		// 停止		this.stop.setOnClickListener(new OnClickListener() {			@Override			public void onClick(View v) {				if (m_musicplayer!=null) {					m_musicplayer.stop();				}			}		});		// 开始		start.setOnClickListener(new OnClickListener() {			@Override			public void onClick(View v) {				// TODO Auto-generated method stub				playMusic(m_playlist.get(m_list_item));			}		});		// 下一首		next.setOnClickListener(new OnClickListener() {			@Override			public void onClick(View v) {				// TODO Auto-generated method stub				nextMusic();			}		});		// 暂停		pause.setOnClickListener(new OnClickListener() {			@Override			public void onClick(View v) {				// TODO Auto-generated method stub				if (m_musicplayer.isPlaying()) {					m_musicplayer.pause();				} else {					m_musicplayer.start();				}			}		});		// 上一首		last.setOnClickListener(new OnClickListener() {			@Override			public void onClick(View v) {				// TODO Auto-generated method stub				lastMusic();			}		});	}	// 获取SD音乐	private void musicList() {		// TODO Auto-generated method stub		m_playlist.clear();		search(m_musicpath, "mp3", m_playlist);				SimpleAdapter adapter = new SimpleAdapter(this, this.getData(),				R.layout.m_musicitem,				new String[] { "song_name", "info", "img" }, new int[] {						R.id.song_name, R.id.info, R.id.img });		setListAdapter(adapter);	}	// 遍历路径下指定后缀名	private void search(String dir, final String suffix, List
     
       list) {		File file = new File(dir);		// 遍历该目录中所有文件		File[] files = file.listFiles();		if ((files != null) && (files.length > 0)) {			for (File tmpfile : files) {				// 如果是文件夹，继续遍历该目录				if (tmpfile.isDirectory()) {					search(tmpfile.getPath(), suffix, list);				} else {					//判断文件后缀名					if (tmpfile.getPath().endsWith(suffix)) {						list.add(tmpfile.getPath());					}				}			}		}	}	private List
      
       
        > getData() {		List
        
         
          > m_list = new ArrayList
          
           
            >(); Map
            
              map; for (int i = 0; i < m_playlist.size(); i++) { map = new HashMap
             
              (); //获取MP3中的歌曲信息 File file = new File(m_playlist.get(i)); map.put("song_name", file.getName()); map.put("info", "test"); map.put("img", R.drawable.panda); m_list.add(map); } return m_list; } // 获取按钮 private void findView() { // TODO Auto-generated method stub start = (Button) findViewById(R.id.start); stop = (Button) findViewById(R.id.stop); last = (Button) findViewById(R.id.last); next = (Button) findViewById(R.id.next); pause = (Button) findViewById(R.id.pause); } // 播放音乐 void playMusic(String path) { try { m_musicplayer.reset(); m_musicplayer.setDataSource(path); m_musicplayer.prepare();// 准备同步 m_musicplayer.start(); if (m_playlist.isEmpty() == true) { Toast.makeText(this, "播放列表为空", 1000).show(); return; } m_musicplayer.setOnCompletionListener(new OnCompletionListener() { @Override public void onCompletion(MediaPlayer arg0) { // TODO Auto-generated method stub nextMusic(); } }); } catch (Exception e) { e.printStackTrace(); } } // 上一首 void lastMusic() { if (m_list_item == 0) { m_list_item = m_playlist.size() - 1; } else { m_list_item--; } String path = m_playlist.get(m_list_item); playMusic(path); } // 下一首 void nextMusic() { if (m_list_item == (m_playlist.size() - 1)) { m_list_item = 0; } else { m_list_item++; } String path = m_playlist.get(m_list_item); playMusic(path); } // 选择列表项时，播放音乐 @Override protected void onListItemClick(ListView l, View v, int position, long id) { // TODO Auto-generated method stub m_list_item = position; String path = m_playlist.get(m_list_item); playMusic(path); } // 当用户返回时结束音乐并释放音乐对象 @Override public boolean onKeyDown(int keyCode, KeyEvent event) { // TODO Auto-generated method stub if (keyCode == KeyEvent.KEYCODE_BACK) { m_musicplayer.stop(); m_musicplayer.release(); this.finish(); return true; } return super.onKeyDown(keyCode, event); }}