Android实现网络音乐播放器
16lz
2022-03-16
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
完成
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