Android实现网络音乐播放器
本文是一个简单的音乐播放器
布局代码
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.zj.music.MainActivity">
<ProgressBar android:id="@+id/song_progress_normal" style="@style/Widget.AppCompat.ProgressBar.Horizontal" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_gravity="top" android:maxHeight="5dp" android:progress="30" android:tag="tint_accent_color" />
<LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_below="@id/song_progress_normal" android:orientation="horizontal" android:gravity="center_horizontal" >
<ImageView android:id="@+id/previous" android:clickable="true" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/btn_playback_previous"/>
<ImageView android:layout_marginLeft="20dp" android:id="@+id/start" android:clickable="true" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/start"/>
<ImageView android:id="@+id/pause" android:clickable="true" android:layout_marginLeft="20dp" android:layout_marginRight="20dp" android:layout_width="wrap_content" android:layout_height="wrap_content" />
<ImageView android:layout_marginRight="20dp" android:id="@+id/stop" android:clickable="true" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/stop"/>
<ImageView android:id="@+id/next" android:clickable="true" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/btn_playback_next"/>
</LinearLayout>
</RelativeLayout>java代码实现
package com.zj.music;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.ImageView;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
ImageView pause;
ImageView start;
ImageView stop;
ImageView previous;
ImageView next;
boolean isPlaying=false;
String filepath="http://10.129.69.114:8080/music";
MediaPlayer mediaPlayer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
pause= (ImageView) findViewById(R.id.pause);
start= (ImageView) findViewById(R.id.start);
stop= (ImageView) findViewById(R.id.stop);
pause.setBackgroundResource(R.drawable.btn_playback_pause);
start.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
startMusic();
}
});
stop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
stopMusic();
}
});
pause.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
isPlaying=!isPlaying;
System.out.println("1243544444444");
if (isPlaying)
{
pause.setBackgroundResource(R.drawable.btn_playback_pause);
rePlayMusic();
}else
{
pause.setBackgroundResource(R.drawable.btn_playback_play);
pauseMusic();
}
}
});
}
private void startMusic() {
String nowMusic=filepath+"1.mp3";
try {
mediaPlayer = new MediaPlayer();
mediaPlayer.setDataSource(nowMusic);//设置播放的数据源。
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
//mediaPlayer.prepare();//同步的准备方法。
mediaPlayer.prepareAsync();//异步的准备
mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mp) {
mediaPlayer.start();
start.setEnabled(false);
}
});
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
start.setEnabled(true);
}
});
} catch (Exception e) {
e.printStackTrace();
Toast.makeText(this, "播放失败", Toast.LENGTH_SHORT).show();
}
}
private void pauseMusic() {
if(mediaPlayer!=null)
mediaPlayer.pause();
}
private void rePlayMusic()
{
if(mediaPlayer!=null)
mediaPlayer.start();
}
public void stopMusic() {
if(mediaPlayer!=null&&mediaPlayer.isPlaying()){
mediaPlayer.stop();
mediaPlayer.release();
mediaPlayer = null;
}
start.setEnabled(true);
}
}注意，音乐文件应该放在webapp/root文件下，而不能直接放在根目录下，否则读不到。
效果如下
更新
- 添加了下一首，进度条功能。
- 解决了使用Fragment作为Item的ViewPager不更新问题.
使用Fragment作为Item的ViewPager不更新问题.
在点击下一首时，发现viewPager里面的内容不更新，查找了不少方法，找到解决方案，应该使用FragmentStatePagerAdapter。
我首先使用的是fragmentPagerAdapter.该类内的每一个生成的 Fragment 都将保存在内存之中. 也就是FragmentManager中.所以就算我刷新adapter, 它还是使用的上次缓存的Fragment. 而FragmentStatePagerAdapter的instantiateItem()则会每次都重新创建Fragment. 这样一来就每次就更新了.
参考链接
使用Fragment作为Item的ViewPager不更新问题. - Crazy Bird - 博客频道 - CSDN.NET
Android– FragmentStatePagerAdapter分页 - dreamzml的专栏 - 博客频道 - CSDN.NET
新代码实现
package com.zj.music;
import android.graphics.Color;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.design.widget.CollapsingToolbarLayout;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
public class MainActivity extends AppCompatActivity {
ImageView pause;
ImageView start;
ImageView stop;
ImageView previous;
ImageView next;
boolean isPlaying=false;
String filepath="http://192.168.1.130:8080/music";
String nowMusic;
int id=1;
MediaPlayer mediaPlayer;
SeekBar song_progress_normal;
private Timer timer;
private TimerTask task;
ViewPager mViewPager;
MyPagerAdapter adapter;
TabLayout tabLayout;
String autors[]=new String[]{"贝多芬","巴赫","舒伯特"};
String songs[]=new String []{"命运交响曲","G弦上的咏叹调","圣母颂"};
private static final int UPDATE = 0;
Handler handler=new Handler()
{
@Override
public void handleMessage(Message msg) {
switch (msg.what)
{
case UPDATE:
song_progress_normal.setProgress(mediaPlayer.getCurrentPosition());
Log.i("mediaplayer",mediaPlayer.getCurrentPosition()+"");
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initTOP();
pause= (ImageView) findViewById(R.id.pause);
start= (ImageView) findViewById(R.id.start);
stop= (ImageView) findViewById(R.id.stop);
previous= (ImageView) findViewById(R.id.previous);
next= (ImageView) findViewById(R.id.next);
song_progress_normal= (SeekBar) findViewById(R.id.song_progress_normal);
song_progress_normal.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
int postion = seekBar.getProgress();
mediaPlayer.seekTo(postion);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
previous.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (id>1)
{
id--;
setupViewPager(mViewPager);
tabLayout.setupWithViewPager(mViewPager);
//adapter.notifyDataSetChanged();
stopMusic();
startMusic();
}
}
});
next.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
id++;
//setupViewPager(mViewPager);
//adapter.notifyDataSetChanged();
setupViewPager(mViewPager);
tabLayout.setupWithViewPager(mViewPager);
stopMusic();
startMusic();
}
});
pause.setBackgroundResource(R.drawable.btn_playback_pause);
start.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
startMusic();
}
});
stop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
stopMusic();
}
});
pause.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
isPlaying=!isPlaying;
System.out.println("1243544444444");
if (isPlaying)
{
pause.setBackgroundResource(R.drawable.btn_playback_pause);
rePlayMusic();
}else
{
pause.setBackgroundResource(R.drawable.btn_playback_play);
pauseMusic();
}
}
});
}
private void initTOP() {
Toolbar mToolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(mToolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
setTitle("音乐鉴赏");
//使用CollapsingToolbarLayout必须把title设置到CollapsingToolbarLayout上，设置到Toolbar上则不会显示
CollapsingToolbarLayout mCollapsingToolbarLayout = (CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar);
mCollapsingToolbarLayout.setTitle("音乐鉴赏");
//通过CollapsingToolbarLayout修改字体颜色
mCollapsingToolbarLayout.setExpandedTitleColor(Color.WHITE);//设置还没收缩时状态下字体颜色
mCollapsingToolbarLayout.setCollapsedTitleTextColor(Color.BLACK);//设置收缩后Toolbar上字体的颜色
//设置ViewPager
mViewPager = (ViewPager) findViewById(R.id.viewpager);
setupViewPager(mViewPager);
//给TabLayout增加Tab, 并关联ViewPager
tabLayout = (TabLayout) findViewById(R.id.sliding_tabs);
tabLayout.addTab(tabLayout.newTab().setText("请您欣赏"));
tabLayout.addTab(tabLayout.newTab().setText("作者简介"));
tabLayout.addTab(tabLayout.newTab().setText("歌曲简介"));
tabLayout.setupWithViewPager(mViewPager);
}
private void setupViewPager(ViewPager mViewPager) {
adapter = new MyPagerAdapter(getSupportFragmentManager());
adapter.addFragment(DetailFragment.newInstance("请欣赏古典音乐，欲知作者与曲名可右滑"), "请您欣赏");
adapter.addFragment(DetailFragment.newInstance(autors[id-1]), "作者简介");
adapter.addFragment(DetailFragment.newInstance(songs[id-1]), "歌曲简介");
mViewPager.setAdapter(adapter);
}
List<Fragment> mFragments;
static class MyPagerAdapter extends FragmentStatePagerAdapter {
private List<Fragment> mFragments=null;
private List<String> mFragmentTitles =null;
public MyPagerAdapter(FragmentManager fm) {
super(fm);
mFragments=new ArrayList<>();
mFragmentTitles = new ArrayList<>();
}
public void addFragment(Fragment fragment, String title) {
mFragments.add(fragment);
mFragmentTitles.add(title);
}
public void removeAllFra()
{
mFragments.clear();
mFragmentTitles.clear();
}
@Override
public Fragment getItem(int position) {
return mFragments.get(position);
}
@Override
public int getCount() {
return mFragments.size();
}
@Override
public CharSequence getPageTitle(int position) {
return mFragmentTitles.get(position);
}
}
private void startMusic() {
nowMusic=filepath+id+".mp3";
try {
mediaPlayer = new MediaPlayer();
mediaPlayer.setDataSource(nowMusic);//设置播放的数据源。
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
//mediaPlayer.prepare();//同步的准备方法。
mediaPlayer.prepareAsync();//异步的准备
mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mp) {
mediaPlayer.start();
start.setEnabled(false);
int max = mediaPlayer.getDuration();
Log.i("mediaplayer", max + "最大");
song_progress_normal.setMax(max);
}
});
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
start.setEnabled(true);
}
});
new Thread(new Runnable() {
@Override
public void run() {
timer = new Timer();
task = new TimerTask() {
@Override
public void run() {
handler.sendEmptyMessage(UPDATE);
}
};
timer.schedule(task, 0, 5000);
}
}).start();
} catch (Exception e) {
e.printStackTrace();
Toast.makeText(this, "播放失败", Toast.LENGTH_SHORT).show();
}
}
private void pauseMusic() {
if(mediaPlayer!=null)
mediaPlayer.pause();
}
private void rePlayMusic()
{
if(mediaPlayer!=null)
mediaPlayer.start();
}
public void stopMusic() {
if(mediaPlayer!=null&&mediaPlayer.isPlaying()){
mediaPlayer.stop();
mediaPlayer.release();
mediaPlayer = null;
timer.cancel();
}
start.setEnabled(true);
}
}效果如下
