Android音乐播放器【安卓进化二十】

今日看书，看到这个播放器，我就写了个例子，感觉还行，这个播放器能播放后缀是。MP3的音乐，这个例子在main.xml设置listView的时候，注意：android:id="@+id/android:list"的设置，否则程序会报错，说找不到listview。这个效果还是不错的。可以当做是简单的音乐播放器，可以读取sdcard里面后缀是。MP3的歌曲。有问题可以留言，想要源码可以留言，这个代码比较简单。转载请标明出处：

http://blog.youkuaiyun.com/wdaming1986/article/details/6768884

csdn资源下载链接地址：http://download.youkuaiyun.com/detail/wdaming1986/3611735

看程序效果图：可以点击每首歌播放，

也可以用下面的按钮：修改后的程序加了滚动条了

代码说明一切：

一、MainActivity。java类中的代码：

package com.cn.daming; import java.io.File; import java.io.FilenameFilter; import java.io.IOException; import java.util.ArrayList; import java.util.List; import android.app.ListActivity; import android.graphics.Color; import android.graphics.drawable.GradientDrawable; import android.graphics.drawable.GradientDrawable.Orientation; import android.media.MediaPlayer; import android.media.MediaPlayer.OnCompletionListener; import android.os.Bundle; import android.os.Handler; import android.view.KeyEvent; import android.view.View; import android.view.View.OnClickListener; import android.widget.ArrayAdapter; import android.widget.ImageButton; import android.widget.ListView; import android.widget.SeekBar; import android.widget.SeekBar.OnSeekBarChangeListener; import android.widget.TextView; public class MainActivity extends ListActivity { private ImageButton mFrontImageButton = null; private ImageButton mStopImageButton = null; private ImageButton mStartImageButton = null; private ImageButton mPauseImageButton = null; private ImageButton mNextImageButton = null; /*定义进度handler，显示百分比进度*/ Handler mPercentHandler = new Handler(); private SeekBar mSeekBar=null; private TextView curProgressText=null; private TextView curtimeAndTotaltime=null; public MediaPlayer mMediaPlayer; private List<String> mMusicList = new ArrayList<String>(); private int currentListItem = 0; private static final String MUSIC_PATH = new String("/sdcard/"); @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); drawBackground(); setContentView(R.layout.main); musicList(); mMediaPlayer = new MediaPlayer(); initmFrontMusic(); initStopMusic(); initStartMusic(); initPauseMusic(); initNextMusic(); initSeekBar(); } public void drawBackground() { GradientDrawable grad = new GradientDrawable( Orientation.TL_BR, new int[] { Color.rgb(0, 0, 127), Color.rgb(0, 0, 255), Color.rgb(127, 0, 255), Color.rgb(127, 127, 255), Color.rgb(127, 255, 255), Color.rgb(255, 255, 255) } ); this.getWindow().setBackgroundDrawable(grad); } public void initmFrontMusic() { mFrontImageButton = (ImageButton)findViewById(R.id.front_button); mFrontImageButton.setOnClickListener(new OnClickListener(){ public void onClick(View arg0) { if(--currentListItem >= 0){ currentListItem = mMusicList.size(); }else{ playMusic(MUSIC_PATH + mMusicList.get(currentListItem)); } } }); } public void initStopMusic() { mStopImageButton = (ImageButton)findViewById(R.id.stop_button); mStopImageButton.setOnClickListener(new OnClickListener(){ public void onClick(View arg0) { if(mMediaPlayer.isPlaying()) { mMediaPlayer.reset(); } } }); } public void initStartMusic() { mStartImageButton = (ImageButton)findViewById(R.id.start_button); mStartImageButton.setOnClickListener(new OnClickListener(){ public void onClick(View arg0) { playMusic(MUSIC_PATH + mMusicList.get(currentListItem)); startSeekBarUpdate(); } }); } public void initPauseMusic() { mPauseImageButton = (ImageButton)findViewById(R.id.pause_button); mPauseImageButton.setOnClickListener(new OnClickListener(){ public void onClick(View arg0) { if(mMediaPlayer.isPlaying()){ mMediaPlayer.pause(); } else{ mMediaPlayer.start(); } } }); } public void initNextMusic() { mNextImageButton = (ImageButton)findViewById(R.id.next_button); mNextImageButton.setOnClickListener(new OnClickListener(){ public void onClick(View arg0) { nextMusic(); } }); } public void initSeekBar() { /*初始化拖动条和当前进度显示值*/ mSeekBar=(SeekBar)findViewById(R.id.SeekBar01); curProgressText=(TextView)findViewById(R.id.currentProgress); curtimeAndTotaltime=(TextView)findViewById(R.id.curtimeandtotaltime); mSeekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() { public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { /* 如果拖动进度发生改变，则显示当前进度值 */ curProgressText.setText("当前进度: " + progress); } public void onStartTrackingTouch(SeekBar arg0) { curProgressText.setText("拖动中..."); } public void onStopTrackingTouch(SeekBar arg0) { int dest = mSeekBar.getProgress(); int mMax = mMediaPlayer.getDuration(); int sMax = mSeekBar.getMax(); mMediaPlayer.seekTo(mMax*dest/sMax); } }); } private void playMusic(String path) { try { mMediaPlayer.reset(); mMediaPlayer.setDataSource(path); mMediaPlayer.prepare(); mMediaPlayer.start(); mMediaPlayer.setOnCompletionListener(new OnCompletionListener(){ public void onCompletion(MediaPlayer arg0) { nextMusic(); } }); }catch (IOException e) { e.printStackTrace(); } } private void nextMusic() { if(++currentListItem >= mMusicList.size()) { currentListItem = 0; } else { playMusic(MUSIC_PATH + mMusicList.get(currentListItem)); } } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if(keyCode == KeyEvent.KEYCODE_BACK){ mMediaPlayer.stop(); mMediaPlayer.release(); } return super.onKeyDown(keyCode, event); } @Override protected void onListItemClick(ListView l, View v, int position, long id) { currentListItem = position; playMusic(MUSIC_PATH + mMusicList.get(position)); super.onListItemClick(l, v, position, id); } //播放列表 public void musicList() { File home = new File(MUSIC_PATH); if(home.listFiles(new MusicFilter()).length > 0) { for(File file : home.listFiles(new MusicFilter())) { mMusicList.add(file.getName()); } ArrayAdapter<String> musicList = new ArrayAdapter<String>(MainActivity.this,R.layout.musicitem,mMusicList); setListAdapter(musicList); } } /*更新拖动条进度*/ public void startSeekBarUpdate() { mPercentHandler.post(start); } Runnable start = new Runnable() { public void run() { // 用一个handler更新SeekBar mPercentHandler.post(updatesb); } }; Runnable updatesb =new Runnable(){ public void run() { int position = mMediaPlayer.getCurrentPosition(); int mMax = mMediaPlayer.getDuration(); int sMax = mSeekBar.getMax(); mSeekBar.setProgress(position * sMax / mMax); curtimeAndTotaltime.setText("当前播放时间： " + position / 1000 + "秒" + "\n歌曲总时间: " + mMax / 1000 + "秒"); // 每秒钟更新一次 mPercentHandler.postDelayed(updatesb, 1000); } }; //过滤文件类型 class MusicFilter implements FilenameFilter { public boolean accept(File dir, String name) { //这里还可以设置其他格式的音乐文件 return (name.endsWith(".mp3")); } } }

二、main。xml布局文件的代码：

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <TextView android:layout_width="fill_parent" android:layout_height="25dip" android:paddingTop="5dip" android:layout_gravity="center_horizontal" android:gravity="center_horizontal" android:textColor="#FF000000" android:text="大明制作Mp3播放器" /> <ListView android:id="@+id/android:list" android:layout_width="fill_parent" android:layout_height="200dip" android:layout_weight="1" android:drawSelectorOnTop="false" /> <SeekBar android:id="@+id/SeekBar01" android:layout_height="wrap_content" android:layout_width="fill_parent" android:max="100" android:progress="0" android:secondaryProgress="0" android:visibility="visible" /> <TextView android:layout_height="wrap_content" android:layout_width="fill_parent" android:id="@+id/currentProgress" /> <TextView android:layout_height="wrap_content" android:layout_width="fill_parent" android:layout_y="300dp" android:id="@+id/curtimeandtotaltime" /> <LinearLayout android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" > <ImageButton android:id="@+id/front_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/first1" android:layout_marginLeft="10dip" /> <ImageButton android:id="@+id/stop_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/stop1" android:layout_marginLeft="10dip" /> <ImageButton android:id="@+id/start_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/start1" android:layout_marginLeft="10dip" /> <ImageButton android:id="@+id/pause_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/pose1" android:layout_marginLeft="10dip" /> <ImageButton android:id="@+id/next_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/next1" android:layout_marginLeft="10dip" /> </LinearLayout> </LinearLayout>

三、musicitem.xml布局文件的代码：

<?xml version="1.0" encoding="utf-8"?> <TextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/TextView01" android:layout_width="fill_parent" android:layout_height="26dip" android:layout_gravity="center_vertical" android:paddingTop="5dip" android:paddingLeft="20dip" android:textColor="#FF000000" android:text="@string/hello1"/>

四、Manifest。xml文件

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.cn.daming" android:versionCode="1" android:versionName="1.0"> <uses-sdk android:minSdkVersion="8" /> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".MainActivity" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>