Android开发本地及网络Mp3音乐播放器(十六)歌词显示及滚动事件实现、ViewPager使用

实现功能：

歌词显示及滚动事件实现

ViewPager使用

后续将博文，将实现已下载音乐扫描功能和已存在歌曲歌词下载。

因为，没有自己的服务器，所以网络音乐所有相关功能(包含搜索音乐、下载音乐、下载歌词)均无法保证时效性，建议，尽快下载和练习；如果你下载时候，已经因为我采集的服务器更改规则，请给我留言，如果可以解决，我将在有空的时候献上新的源码。

截止到目前的源码下载：
http://download.csdn.net/album/detail/3105
(最新的，请下载最后一个，本博文对应版本2.1；如果需要逐步实现的过程，请下载所有)

欢迎移动开发爱好者交流：我的微信是iwanghang

另外，我打算开始找工作，如果沈阳或周边城市公司有意，也请与我联系。

实现效果如图：





实现代码如下：

PlayActivity如下：

package com.iwanghang.drmplayer;

import android.graphics.Bitmap;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;
import android.widget.Toast;

import com.douzi.android.view.DefaultLrcBuilder;
import com.douzi.android.view.ILrcBuilder;
import com.douzi.android.view.ILrcView;
import com.douzi.android.view.LrcRow;
import com.douzi.android.view.LrcView;
import com.iwanghang.drmplayer.adapter.ViewPagerAdapter;
import com.iwanghang.drmplayer.utils.Constant;
import com.iwanghang.drmplayer.utils.ImageUtils;
import com.iwanghang.drmplayer.utils.MediaUtils;
import com.iwanghang.drmplayer.vo.Mp3Info;
import com.lidroid.xutils.db.sqlite.Selector;
import com.lidroid.xutils.exception.DbException;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.List;

import static com.iwanghang.drmplayer.PlayService.ORDER_PLAY;
import static com.iwanghang.drmplayer.PlayService.RANDOM_PLAY;
import static com.iwanghang.drmplayer.PlayService.SINGLE_PLAY;

/**
* PlayActivity 点击MyMusicListFragment(本地音乐)底部UI中的专辑封面图片打开的Activity
*/
public class PlayActivity extends BaseActivity implements OnClickListener, OnSeekBarChangeListener ,OnPageChangeListener {
private TextView textView2_title;//歌名
private ImageView imageView1_ablum;//专辑封面图片
private SeekBar seekBar1;//进度条
private TextView textView1_start_time, textView1_end_time;//开始时间,结束时间
private ImageView imageView1_play_mode;//菜单
private ImageView imageView3_previous, imageView2_play_pause, imageView1_next;//上一首,播放暂停,下一首
private ImageView imageView1_ablum_reflection;//专辑封面图片倒影
private ImageView imageView1_favorite;//收藏按钮

//private ArrayList<Mp3Info> mp3Infos;
//private int position;//当前播放的位置
private boolean isPause = false;//当前播放的是否为暂停状态
private static final int UPDATE_TIME = 0x10;//更新播放事件的标记

private DRMPlayerApp app;//取出全局对象 方便调用

//歌词
private ViewPager viewPager;
private LrcView lrcView;// 自定义歌词视图
private ArrayList<View> views = new ArrayList<>();
private static final int UPDATE_LRC = 0x20;//更新播放事件的标记
ILrcView mLrcView;
public final static String TAG = "PlayActivity";
private MediaPlayer mPlayer;
private ViewPagerAdapter adapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_music_play);
//取出全局对象 方便调用
app = (DRMPlayerApp) getApplication();
//初始化界面信息
//textView2_title = (TextView) findViewById(R.id.textView2_title);//歌名
//imageView1_ablum = (ImageView) findViewById(R.id.imageView1_ablum);//专辑封面图片
seekBar1 = (SeekBar) findViewById(R.id.seekBar1);//进度条
textView1_start_time = (TextView) findViewById(R.id.textView1_start_time);//开始时间
textView1_end_time = (TextView) findViewById(R.id.textView1_end_time);//结束时间
imageView1_play_mode = (ImageView) findViewById(R.id.imageView1_play_mode);//菜单
imageView3_previous = (ImageView) findViewById(R.id.imageView3_previous);//上一首
imageView2_play_pause = (ImageView) findViewById(R.id.imageView2_play_pause);//播放暂停
imageView1_next = (ImageView) findViewById(R.id.imageView1_next);//下一首
imageView1_favorite = (ImageView) findViewById(R.id.imageView1_favorite);//收藏按钮
lrcView = (LrcView) findViewById(R.id.lrcView);//自定义歌词视图

//注册按钮点击监听事件
imageView1_play_mode.setOnClickListener(this);
imageView2_play_pause.setOnClickListener(this);
imageView3_previous.setOnClickListener(this);
imageView1_next.setOnClickListener(this);
seekBar1.setOnSeekBarChangeListener(this);
imageView1_favorite.setOnClickListener(this);

//mp3Infos = MediaUtils.getMp3Infos(this);
//bindPlayService();//绑定服务,异步过程,绑定后需要取得相应的值,来更新界面
myHandler = new MyHandler(this);

//独立音乐播放界面 和 歌词界面
//viewPager = (ViewPager) findViewById(R.id.fgv_player_main);
viewPager = (ViewPager) findViewById(R.id.viewpager);
initViewPager();//初始化

//以下直接调用change()是不行的,因为异步问题,会发生NullPointerException空指针异常
//从MyMusicListFragment的专辑封面图片点击时间传过来的position(当前播放的位置)
//position = getIntent().getIntExtra("position",0);
//change(position);

//通过在BaseActivity中绑定Service,添加如下代码实现change()
//musicUpdatrListener.onChange(playService.getCurrentProgeress());

//从MyMusicListFragment的专辑封面图片点击时间传过来的isPause(当前播放的是否为暂停状态)
//isPause = getIntent().getBooleanExtra("isPause",false);

//        mLrcView = new LrcView(this, null);
//        setContentView((View) mLrcView);
//
//        //在目标位置读取lrc文件
//        File LrcDirFile = new File(Environment.getExternalStorageDirectory() + Constant.DIR_LRC);
//        System.out.println("LrcDirFile : " + LrcDirFile);
//        if (!LrcDirFile.exists()) {
//            LrcDirFile.mkdirs();
//        }
//        //把lrc转成字符串
//        String lrc = LrcDirFile + "/" + "山丘" + ".lrc";
//        //Log.d的输出颜色是蓝色的，仅输出debug调试的意思，但他会输出上层的信息，过滤起来可以通过DDMS的Logcat标签来选择.
//        Log.d(TAG, "lrc:" + lrc);
//
//        //把lrc的字符串 转成数组
//        ILrcBuilder builder = new DefaultLrcBuilder();
//        List<LrcRow> rows = builder.getLrcRows(lrc);
//
//        //把lrc数组 设置到mLrcView里
//        mLrcView.setLrc(rows);
//        //beginLrcPlay();
//
//        //设置监听器,监听歌词滚动
//        mLrcView.setListener(new ILrcView.LrcViewListener() {
//            public void onLrcSeeked(int newPosition, LrcRow row) {
//                if (mPlayer != null) {
//                    Log.d(TAG, "onLrcSeeked:" + row.time);
//                    mPlayer.seekTo((int)row.time);//用户滑动歌词界面,调整进度
//                }
//            }
//        });
}

private void initViewPager() {//专辑封面图片Pager与歌词Pager
//View album_image_layout = getLayoutInflater().inflate(R.layout.album_image_layout, null);
//System.out.println("PlayActivity.initViewPager.album_image_layout:" + album_image_layout);

View album_image_layout = LayoutInflater.from(getApplicationContext()).inflate(R.layout.album_image_layout, null);
System.out.println("PlayActivity.initViewPager.album_image_layout:" + album_image_layout);
//初始化界面信息

//textView2_title = (TextView) findViewById(R.id.textView2_title);//歌名
//这里要注意下,直接findViewById,返回的是textView2_title是null;像下面这样,加上layout才可以,否则在change的时候会报空指针异常
textView2_title = (TextView) album_image_layout.findViewById(R.id.textView2_title);//歌名
//System.out.println("PlayActivity.initViewPager.textView2_title:" + textView2_title);
//System.out.println("PlayActivity.initViewPager.textView2_title.getText:" + textView2_title.getText());

imageView1_ablum = (ImageView) album_image_layout.findViewById(R.id.imageView1_ablum);//专辑封面图片

imageView1_ablum_reflection = (ImageView) album_image_layout.findViewById(R.id.imageView1_ablum_reflection);//专辑封面图片倒影

views.add(album_image_layout);//添加专辑封面图片Pager

//View lrc_layout = getLayoutInflater().inflate(R.layout.lrc_layout, null);

View lrc_layout = LayoutInflater.from(getApplicationContext()).inflate(R.layout.lrc_layout, null);
System.out.println("PlayActivity.initViewPager.lrc_layout:" + lrc_layout);

lrcView = (LrcView) lrc_layout.findViewById(R.id.lrcView);
//设置滚动事件
lrcView.setListener(new ILrcView.LrcViewListener() {
@Override
public void onLrcSeeked(int newPosition, LrcRow row) {
if (playService.isPlaying()) {
playService.seekTo((int) row.time);
}
}
});
lrcView.setLoadingTipText("正在加载歌词......");
lrcView.setBackgroundResource(R.mipmap.app_splash_bg);
lrcView.getBackground().setAlpha(150);//背景透明度0-255
views.add(lrc_layout);
System.out.println("PlayActivity.initViewPager.views:" + views);

//adapter = new ViewPagerAdapter(views);
adapter = new ViewPagerAdapter(views);
viewPager.setAdapter(adapter);

//viewPager.setAdapter(new ViewPagerAdapter(views));
System.out.println("PlayActivity.initViewPager.viewPager:" + viewPager);
viewPager.addOnPageChangeListener(this);
System.out.println("PlayActivity.initViewPager.viewPager:" + viewPager);
}

//把播放服务的绑定和解绑放在onResume,onPause里,好处是,每次回到当前Activity就获取一次播放状态
@Override
protected void onResume() {
super.onResume();
bindPlayService();//绑定服务
}

@Override
protected void onPause() {
super.onPause();
unbindPlayService();//解绑服务
}

@Override
protected void onDestroy() {
super.onDestroy();
unbindPlayService();//解绑服务
}

//Handler用于更新已经播放时间
private static MyHandler myHandler;

//进度条改变 (fromUser 是否来自用户的改变 , 而不是程序自身控制的改变)
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
if (fromUser) {
//playService.pause();//暂停
playService.seekTo(progress);//寻找指定的时间位置 (跳到某个时间点进行播放)
//playService.start();//播放
}
}

//进度条开始触摸
@Override
public void onStartTrackingTouch(SeekBar seekBar) {

}

//进度条停止触摸
@Override
public void onStopTrackingTouch(SeekBar seekBar) {

}

//页面滚动
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

}

//页面选择
@Override
public void onPageSelected(int position) {

}

//页面滚动状态改变
@Override
public void onPageScrollStateChanged(int state) {

}

static class MyHandler extends Handler {
private PlayActivity playActivity;
private WeakReference<PlayActivity> weak;//弱引用

public MyHandler(PlayActivity playActivity) {
//this.playActivity = playActivity;
weak = new WeakReference<PlayActivity>(playActivity);
}

@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
//System.out.println("PlayActivity.MyHandler.weak = " + weak);
playActivity = weak.get();
//System.out.println("PlayActivity.MyHandler.playActivity = " + playActivity);
if (playActivity != null) {
switch (msg.what) {
case UPDATE_TIME://更新时间(已经播放时间)
playActivity.textView1_start_time.setText(MediaUtils.formatTime((int) msg.obj));
break;
case UPDATE_LRC:
playActivity.lrcView.seekLrcToTime((int) msg.obj);
break;
default:
break;
}
}
}
}

@Override
public void publish(int progress) {
//以下是是直接调用线程,但是不能这样做,会报错,线程异常
//textView1_start_time.setText(MediaUtils.formatTime(progress));
//所以,我们需要使用Handler
//Message msg = myHandler.obtainMessage(UPDATE_TIME);//用于更新已经播放时间
//msg.arg1 = progress;//用于更新已经播放时间
//myHandler.sendMessage(msg);//用于更新已经播放时间

//seekBar1.setProgress(progress);

myHandler.obtainMessage(UPDATE_TIME, progress).sendToTarget();
seekBar1.setProgress(progress);
myHandler.obtainMessage(UPDATE_LRC, progress).sendToTarget();
//System.out.println("PlayActivity.publish.myHandler = " + myHandler);
//System.out.println("PlayActivity.publish.UPDATE_LRC = " + UPDATE_LRC);
//System.out.println("PlayActivity.publish.progress = " + progress);
}

@Override
public void change(int position) {//初始化,独立播放界面的歌曲切换后的初始化界面上的歌曲信息
//if (this.playService.isPlaying()) {//获取是否为播放状态
//System.out.println("PlayActivity.change.position = " + position);
Mp3Info mp3Info = playService.mp3Infos.get(position);
//System.out.println("PlayActivity.change.getTitle = " + mp3Info.getTitle());
textView2_title.setText(mp3Info.getTitle());//设置歌名
//textView2_title.setTtileText(mp3Info.getTitle());//设置歌名
//System.out.println("PlayActivity.change.textView2_title = " + textView2_title);
//System.out.println("PlayActivity.change.getText : " + textView2_title.getText());
//System.out.println("PlayActivity.change.getText : " + textView2_title.getTtileText());

//下面这句话是提交更新UI的,但是这个功能在adapter里面实现了,但是实现的方式,只适合UI需要更新的内容很少的时候
//而且,就算使用,也是设置了专辑图片和倒影,以后使用,不是这里.
//之所以放在这里,是因为我开始调试的时候,无法setText,最后通过Debug找到了问题所在
//以后我会专门开个博文,介绍一下Debug
//adapter.notifyDataSetChanged();

//setText后,歌名没有显示,但是可以getText,尝试隐藏/显示,来刷新UI,结果歌名还是没有显示
//viewPager.setVisibility(View.GONE);
//getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.activity_music_play);
//viewPager.setVisibility(View.VISIBLE);

//setText后,歌名没有显示,但是可以getText,尝试隐藏/显示,来刷新UI,结果歌名还是没有显示
//viewPager.setVisibility(View.GONE);
//viewPager.setVisibility(View.VISIBLE);

//获取专辑封面图片
Bitmap albumBitmap = MediaUtils.getArtwork(this, mp3Info.getId(), mp3Info.getAlbumId(), true, false);
//改变播放界面专辑封面图片
imageView1_ablum.setImageBitmap(albumBitmap);
textView1_end_time.setText(MediaUtils.formatTime(mp3Info.getDuration()));//设置结束时间
imageView2_play_pause.setImageResource(R.mipmap.app_music_pause);//设置暂停图片
seekBar1.setProgress(0);//设置当前进度为0
seekBar1.setMax((int) mp3Info.getDuration());//设置进度条最大值为MP3总时间
if (playService.isPlaying()) {
imageView2_play_pause.setImageResource(R.mipmap.app_music_pause);
} else {
imageView2_play_pause.setImageResource(R.mipmap.app_music_play);
}

if (imageView1_ablum != null) {
imageView1_ablum_reflection.setImageBitmap(ImageUtils.createReflectionBitmapForSingle(albumBitmap));//显示倒影
}
switch (playService.getPlay_mode()) {
case ORDER_PLAY://顺序播放
imageView1_play_mode.setImageResource(R.mipmap.app_mode_order);
//imageView2_play_pause.setTag(ORDER_PLAY);
break;
case PlayService.RANDOM_PLAY://随机播放
imageView1_play_mode.setImageResource(R.mipmap.app_mode_random);
//imageView2_play_pause.setTag(RANDOM_PLAY);
break;
case PlayService.SINGLE_PLAY://单曲循环
imageView1_play_mode.setImageResource(R.mipmap.app_mode_single);
//imageView2_play_pause.setTag(SINGLE_PLAY);
break;
default:
break;
}

long id = getId(mp3Info);

//初始化收藏状态
try {
Mp3Info loveMp3Info = app.dbUtils.findFirst(Selector.from(Mp3Info.class).where("mp3InfoId", "=", mp3Info.getMp3InfoId()));//查出歌曲,SQL语句
System.out.println("初始化收藏状态" + loveMp3Info);
//            if (loveMp3Info != null) {
//                imageView1_favorite.setImageResource(R.mipmap.app_love_selected);
//            } else {
//                imageView1_favorite.setImageResource(R.mipmap.app_love_unselected);
//            }
if (loveMp3Info != null) {
System.out.println("loveMp3Info.getIsLove() = " + loveMp3Info.getIsLove());
if (loveMp3Info.getIsLove() == 0) {//返回值不为null,且,isLove为0时,也显示为'未收藏'
imageView1_favorite.setImageResource(R.mipmap.app_love_unselected);
}else {//返回值为null,且,isLove为1时,一定显示为'已收藏'
imageView1_favorite.setImageResource(R.mipmap.app_love_selected);
}
} else {//返回值为null,一定显示为'未收藏'
imageView1_favorite.setImageResource(R.mipmap.app_love_unselected);
}
} catch (DbException e) {
e.printStackTrace();
}

//歌词
String songName = mp3Info.getTitle();
//歌词功能还不完善,后面会博文,会继续完善,暂时使用我已经下载好的lrc测试效果.
songName = "山丘";//测试用的lrc的歌名
String lrcPath = Environment.getExternalStorageDirectory() + Constant.DIR_LRC + "/" + songName + ".lrc";
File lrcFile = new File(lrcPath);
if (!lrcFile.exists()){
//下载
System.out.println("请下载歌词");
}else{
loadLRC(lrcFile);
}
}

//如果是本地音乐,id就是id;如果是收藏音乐,id则是mp3InfoId
//提供给 收藏按钮 点击事件时 调用.
private long getId(Mp3Info mp3Info){
//初始收藏状态
long id = 0;
switch (playService.getChangePlayList()){
case PlayService.MY_MUSIC_LIST:
System.out.println("当前为本地列表");
id = mp3Info.getId();
System.out.println("id =" + id);
break;
case PlayService.LOVE_MUSIC_LIST:
System.out.println("当前为收藏列表");
id = mp3Info.getMp3InfoId();
System.out.println("id =" + id);
break;
default:
break;
}
return id;
}

//点击事件
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.imageView2_play_pause: {//播放暂停按钮
if (playService.isPlaying()) {//如果是播放状态
imageView2_play_pause.setImageResource(R.mipmap.app_music_play);//设置播放图片
playService.pause();
} else {
if (playService.isPause()) {
imageView2_play_pause.setImageResource(R.mipmap.app_music_pause);//设置暂停图片
playService.start();//播放事件
} else {
//只有打开APP没有点击任何歌曲,同时,直接点击暂停播放按钮时.才会调用
//playService.play(0);

//只有打开APP没有点击任何歌曲,同时,直接点击暂停播放按钮时.才会调用
//默认播放的是,在PlayService的onCreate中 恢复状态值
playService.play(playService.getCurrentPosition());
}
}
break;
}
case R.id.imageView1_next: {//下一首按钮
playService.next();//下一首
break;
}
case R.id.imageView3_previous: {//上一首按钮
playService.prev();//上一首
break;
}
case R.id.imageView1_play_mode: {//循环模式按钮
//int mode = (int) imageView1_play_mode.getTag();
/**
* 以下Tosat内容,在strings.xml里,添加对应代码
*<string name="order_play">顺序播放</string>
*<string name="random_play">随机播放</string>
*<string name="single_play">单曲循环</string>
*/
switch (playService.getPlay_mode()) {
case ORDER_PLAY:
imageView1_play_mode.setImageResource(R.mipmap.app_mode_random);
//imageView1_play_mode.setTag(RANDOM_PLAY);
playService.setPlay_mode(RANDOM_PLAY);
//Toast.makeText(getApplicationContext(),"随机播放",Toast.LENGTH_SHORT).show();//这句也可以
//Toast.makeText(PlayActivity.this, "随机播放", Toast.LENGTH_SHORT).show();//这句也可以
Toast.makeText(PlayActivity.this, getString(R.string.random_play), Toast.LENGTH_SHORT).show();
break;
case RANDOM_PLAY:
imageView1_play_mode.setImageResource(R.mipmap.app_mode_single);
//imageView1_play_mode.setTag(SINGLE_PLAY);
playService.setPlay_mode(SINGLE_PLAY);
//Toast.makeText(getApplicationContext(),"单曲循环",Toast.LENGTH_SHORT).show();//这句也可以
//Toast.makeText(PlayActivity.this, "单曲循环", Toast.LENGTH_SHORT).show();//这句也可以
Toast.makeText(PlayActivity.this, getString(R.string.single_play), Toast.LENGTH_SHORT).show();
break;
case SINGLE_PLAY:
imageView1_play_mode.setImageResource(R.mipmap.app_mode_order);
//imageView1_play_mode.setTag(ORDER_PLAY);
playService.setPlay_mode(ORDER_PLAY);
//Toast.makeText(getApplicationContext(),"顺序播放",Toast.LENGTH_SHORT).show();//这句也可以
//Toast.makeText(PlayActivity.this, "顺序播放", Toast.LENGTH_SHORT).show();//这句也可以
Toast.makeText(PlayActivity.this, getString(R.string.order_play), Toast.LENGTH_SHORT).show();
break;
}
break;
}
case R.id.imageView1_favorite: {//收藏按钮  //在vo.Mp3Info里  private long mp3InfoId;//在收藏音乐时用于保存原始ID
Mp3Info mp3Info = playService.mp3Infos.get(playService.getCurrentPosition());//查出歌曲
System.out.println(mp3Info);
try {
Mp3Info loveMp3Info = app.dbUtils.findFirst(Selector.from(Mp3Info.class).where("mp3InfoId","=",getId(mp3Info)));//查出歌曲,SQL语句
System.out.println(loveMp3Info);
if (loveMp3Info==null){//返回值为null,则一定需要save
System.out.println("不在音乐收藏数据库中 保存音乐数据 原始数据: " + mp3Info);
mp3Info.setMp3InfoId(mp3Info.getId());
mp3Info.setIsLove(1);
System.out.println(mp3Info);
app.dbUtils.save(mp3Info);//在音乐收藏数据库 保存音乐
System.out.println("save");
imageView1_favorite.setImageResource(R.mipmap.app_love_selected);

//以下是:调试使用,保存以后再查一遍
loveMp3Info = app.dbUtils.findFirst(Selector.from(Mp3Info.class).where("mp3InfoId","=",getId(mp3Info)));//查出歌曲,SQL语句
System.out.println("调试使用,保存以后再查一遍 最新数据: " + loveMp3Info);
}else {//返回值不为null,则一定需要update
System.out.println("在音乐收藏数据库中 更新音乐数据 原始数据: " + loveMp3Info);
int isLove = loveMp3Info.getIsLove();
if (isLove==1){//返回值不为null,且,isLove为1时;设置isLove为0,同时显示为'未收藏'
loveMp3Info.setIsLove(0);
imageView1_favorite.setImageResource(R.mipmap.app_love_unselected);
}else {//返回值不为null,且,isLove为0时;设置isLove为1,同时显示为'已收藏'
loveMp3Info.setIsLove(1);
imageView1_favorite.setImageResource(R.mipmap.app_love_selected);
}
System.out.println("update");
app.dbUtils.update(loveMp3Info,"isLove");//更新loveMp3Info数据

//以下是:调试使用,更新以后再查一遍
loveMp3Info = app.dbUtils.findFirst(Selector.from(Mp3Info.class).where("mp3InfoId", "=", getId(mp3Info)));//查出歌曲,SQL语句
System.out.println("调试使用,更新以后再查一遍 最新数据: " + loveMp3Info);
}
} catch (DbException e) {
e.printStackTrace();
}
break;
}
default:
break;
}
}

//加载歌词
private void loadLRC(File lrcFile){
StringBuffer buf = new StringBuffer(1024 * 10);
char[] chars = new char[1024];
try {
BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(lrcFile)));
int len = -1;
while ((len = in.read(chars)) != -1){
buf.append(chars,0,len);
}
in.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
}catch (IOException e) {
e.printStackTrace();
}
ILrcBuilder builder = new DefaultLrcBuilder();
List<LrcRow> rows = builder.getLrcRows(buf.toString());
lrcView.setLrc(rows);
//加载专辑封面图片为背景的方法(实际使用,发现效果不理想)
//long id = mp3Info.getMp3InfoId()==0?mp3Info.getId:mp3Info.getMp3InfoId();
//Bitmap bg = MediaUtils.getArtwork(this, id ,mp3Info.getAlbumId(),false,false);
//if(bg != null){
//    lrcView.getBackground(new BitmapDrawable(getResources(),bg));
//   lrcView.getBackground().setAlpha(120);
//}
}

}

activity_music_play如下：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="@dimen/activity_horizontal_margin">

<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_gravity="center"
android:layout_above="@+id/linearLayout3">
</android.support.v4.view.ViewPager>

<LinearLayout
android:id="@+id/linearLayout3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp"
android:orientation="vertical"
android:layout_alignParentBottom="true">

<LinearLayout
android:id="@+id/linearLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:orientation="horizontal">

<TextView
android:id="@+id/textView1_start_time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="00:00"
android:textColor="@android:color/darker_gray" />

<SeekBar
android:id="@+id/seekBar1"
android:layout_width="235dp"
android:layout_height="wrap_content"
android:indeterminate="false"/>

<TextView
android:id="@+id/textView1_end_time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="00:00"
android:textColor="@android:color/darker_gray" />

</LinearLayout>

<RelativeLayout
android:id="@+id/linearLayout2"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_marginBottom="10dp"
android:orientation="horizontal">

<ImageView
android:id="@+id/imageView1_play_mode"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@mipmap/app_music_order"
android:layout_alignBottom="@+id/imageView3_previous"
android:layout_alignParentStart="true" />

<ImageView
android:id="@+id/imageView1_favorite"
android:layout_width="40dp"
android:layout_height="40dp"
android:src="@mipmap/app_love_unselected"
android:layout_alignParentTop="true"
android:layout_toEndOf="@+id/imageView1_play_mode"
android:layout_marginTop="15dp"
android:layout_marginStart="50dp" />

<ImageView
android:id="@+id/imageView3_previous"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_alignTop="@+id/imageView2_play_pause"
android:layout_toLeftOf="@+id/imageView2_play_pause"
android:src="@mipmap/app_music_previous" />

<ImageView
android:id="@+id/imageView2_play_pause"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_alignTop="@+id/imageView1_next"
android:layout_toLeftOf="@+id/imageView1_next"
android:src="@mipmap/app_music_play" />

<ImageView
android:id="@+id/imageView1_next"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:src="@mipmap/app_music_next" />

</RelativeLayout>

</LinearLayout>

</RelativeLayout>

ViewPagerAdapter如下：

package com.iwanghang.drmplayer.adapter;

import android.content.Context;
import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.List;

/**
* Created by iwanghang on 16/5/10.
* ViewPagerAdapter
*/
public class ViewPagerAdapter extends PagerAdapter {
private List<View> list;
private Context context;

public ViewPagerAdapter(List<View> list) {
this.list = list;
}

public ViewPagerAdapter(List<View> list,Context context) {
this.list = list;
this.context = context;
}

@Override
public int getCount() {
if (list != null && list.size() > 0) {
return list.size();
} else {
return 0;
}
}

@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == arg1;
}

@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}

@Override
public Object instantiateItem(ViewGroup container, int position) {
container.addView(list.get(position));
return list.get(position);
}

@Override
public int getItemPosition(Object object) {
return POSITION_NONE;
}

}