Android音乐播放器开发

浏览数：27 / 时间：2015年06月11日

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.csdn.net/wdaming1986/article/details/6768884

csdn资源下载链接地址：http://download.csdn.net/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：

Java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：

Html代码

<span style="font-size: 13px; color: #000000;"><?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>
</span>

三、musicitem.xml布局文件的代码：

Html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

Html代码

<span style="font-size: 13px; color: #000000;"><?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></span>