Android音乐播放器
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2022-08-29 14:47:35
折腾了个把星期的业余时间完善的音乐播放器,立帖为证,先发个帖存备忘,步骤代码以后贴上。...
功能简介
- 读取模拟器中音乐文件;
- 列表展示,获取歌曲详细信息:歌名、歌手名、专辑名、专辑封面、播放时间等;
- 基本功能:上下切歌,播放暂停、进度条显示与点击跳转。
- 成品效果图:
Mediaplayer基本状态
Mediaplayer播放器主要涉及以下状态,通过调用图中函数进行状态跳转。
- Idle //mPlayer刚被创建或者重置之后还未被初始化时的状态;
- Initialized //setDataSource()加载资源后进入初始化状态;
- Preparing和Prepared //Preparing是准备中状态, Prepared是就绪状态,可进行播放属性的设置。
- Started和Paused //播放和暂停状态,调用start()和pause()进行跳转
- Stop //停止状态,当在某个时刻调用了stop()之后,就需要再次调用prepare()使mPlayer转到就绪状态。
- PlaybackCompleted //播放完毕状态,如果设置了循环播放模式,当播放完毕的时候,mPlayer会重新进入到Started状态
- End //End是结束状态,当调用release()时,会释放播放引擎中与mPlayer相关的资源,这时就无法再转换到其他状态了。
-
Error //当mPlayer出现一些错误(例如,格式错误),就会调用OnErrorListener.OnError()方法进入到Error状态。
项目难点详解
添加资源文件
- 工程项目添加
项目res资源文件夹 -> 新建raw资源文件夹 -> 添加资源
- 模拟器添加音乐
1.打开模拟器存储目录,运行模拟器 -> View -> Tools Windows -> Device File Explorer;
2.存储音乐至sdcard/Music/ 或storage/emulated/0/Music/;
3.右键点击Upload,选择音乐资源加载。
权限
- 静态权限
读权限&写权限,直接声明使用
[AndroidManifest.xml]
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
- 动态权限
因为涉及SD卡读取,需要使用动态权限,Android6.0后权限分为静态权限与动态权限,需要分开定义。如果读取工程项目中指定资源资源文件,使用静态权限即可。
[MainActivity.java] 中声明使用,分为权限获取函数及其回调函数
//动态权限申请函数
if (ContextCompat.checkSelfPermission( MainActivity.this,
Manifest.permission.WRITE_APN_SETTINGS ) != PackageManager.PERMISSION_GRANTED) //判断是否已经授权
{
//申请权限 三个参数:1.Activity实例;2.String数组,存放权限;3.唯一请求码
ActivityCompat.requestPermissions( MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE,
Manifest.permission.READ_EXTERNAL_STORAGE}, 1 );
}else{
//填写功能函数
loadLocalMusicData(); //权限请求失败,则加载本地数据源,请求成功则调用回调函数中的加载,不管成功与否都会调用
}
//动态权限获取函数的回调函数
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult( requestCode, permissions, grantResults );
switch (requestCode) {
case 1:
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
//填写功能函数
loadLocalMusicData(); //申请权限成功,扫描模拟器存储,加载资源
} else {
finish();
Toast.makeText( this, "denied!", Toast.LENGTH_SHORT ).show();
}
}
}
媒体库资源更新
在模拟器中添加资源,并通过动态权限进行读取的过程中,Android系统并不会时时全局扫描资源,通常开关机模拟器时才扫描,所以需要进行媒体库的主动扫描资源。
private void loadLocalMusicData() {
/* 更新媒体库mp3文件*/
String file_path = "storage/emulated/0/Music";
MediaScannerConnection.scanFile( this,
new String[]{file_path.toString()},
// null,
new String[]{"mp3"}, //指定扫描mp3文件,缩短时间
new MediaScannerConnection.OnScanCompletedListener() {
@Override
public void onScanCompleted(String path, Uri uri) {
Log.i( "ExternalStorage", "Scanned" + path + ":" );
Log.i( "ExternalStorage", "->" + uri);
}
} );
读取Android多媒体资源文件
这里使用MediaStore库,其是android系统提供的一个多媒体数据库,专门用于存放多媒体信息的,通过ContentResolver即可对数据库进行操作。
- MediaStore.Files: 共享的文件,包括多媒体和非多媒体信息
- MediaStore.Audio: 存放音频信息
- MediaStore.Image: 存放图片信息
- MediaStore.Vedio: 存放视频信息
模块化读取资源信息,如mp3文件中的歌曲名、歌手名、专辑名、时长、存放路径等信息。
- MediaStore.Audio.Media.TITLE //歌曲标题
- MediaStore.Audio.Media.ARTIST //歌手名
- MediaStore.Audio.Media.ALBUM //专辑名
- MediaStore.Audio.Media.DATA //路径
- MediaStore.Audio.Media.DURATION //视频时长
- MediaStore.Audio.Media.ALBUM_ID //相册名
[MainActivity.java]
/* 加载本地存储当中的音乐mp3文件到集合当中*/
// 1.获取ContentResolver对象
ContentResolver resolver = getContentResolver();
// 2.获取本地音乐存储的Uri地址
Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
// 3 开始查询地址 查询接口
Cursor cursor = resolver.query(uri, null, null, null, null);
// 4.遍历Cursor
int id = 0;
while (cursor.moveToNext()) {
String song = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.TITLE)); //歌曲标题
String singer = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ARTIST)); //歌手名
String album = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ALBUM)); //专辑名
id++;
String sid = String.valueOf(id); //序列号
String path = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DATA)); //路径
long duration = cursor.getLong(cursor.getColumnIndex(MediaStore.Audio.Media.DURATION)); //视频时长
SimpleDateFormat sdf = new SimpleDateFormat("mm:ss");
String time = sdf.format(new Date(duration));
// 获取专辑图片主要是通过album_id进行查询
String album_id = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ALBUM_ID));//相册名
String albumArt = getAlbumArt(album_id);
// 将一行当中的数据封装到对象当中
LocalMusicBean bean = new LocalMusicBean(sid, song, singer, album, time, path, albumArt); //每一首歌的信息封装
mDatas.add(bean);
}
// 数据源变化,提示适配器更新
adapter.notifyDataSetChanged();
获取歌曲封面
//获取歌曲的封面
private void loadCover(String path){
MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
mediaMetadataRetriever.setDataSource( path );
byte[] cover = mediaMetadataRetriever.getEmbeddedPicture();
Bitmap bitmap = BitmapFactory.decodeByteArray( cover, 0, cover.length );
albumIv.setImageBitmap( bitmap );
}
获取歌曲的时间以及进度条跳转
- 两个TextView:tv_star, tv_end分别时时显示当前时间,时间总长;
- 一个SeekBar实现进度动态显示与跳转;
- 延时50ms更新时间进度条;
- SeekBar回调函数,点击时、移动时、确定时。
private void SeekBarSet(){
/*新增seekbar进度条*/
int duration = mediaPlayer.getDuration(); //获取视频总时间
seekBar.setMax( duration ); //将音乐总时间设置为Seekbar的最大值
Timer timer = new Timer( );
timer.schedule( new TimerTask() {
@Override
public void run() {
// if (!currentPausePositionInSong){
seekBar.setProgress( mediaPlayer.getCurrentPosition() );
// }
}
},0,50);
seekBar.setOnSeekBarChangeListener( new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
int time_end = mediaPlayer.getDuration() / 1000 ; //获取视频时长
tv_end.setText(calaculateTime( time_end ));
int time_now = mediaPlayer.getCurrentPosition() / 1000;
tv_star.setText(calaculateTime( time_now ) );
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
mediaPlayer.seekTo( seekBar.getProgress() );
// tv_star.setText(formattime( mediaPlayer.getCurrentPosition() ));
}
} );
}
项目部分代码
使用控件列表
控件类型 | 功能 | 详细控件 |
---|---|---|
ImageView | 图形按键 | 上一首、下一首、播放、暂停 |
TextView | 文本栏 | 歌曲名、歌手名、专辑名、单前播放时间、总时长 |
RecyclerView | 滑动列表 | 加载各歌曲信息的列表 |
LocalMusicAdapter | 横条信息展示栏 | 加载每一首歌曲信息的基本信息 |
SeekBar | 进度条 | 显示当前歌曲进度信息 |
基本控件为以上所述,前端代码就不贴了
项目详细代码
[MainActivity.java] 主类,包含各控件定义与各监听器定义及功能
package com.example.musicplayer_2;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.Manifest;
import android.content.ContentResolver;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.media.MediaMetadataRetriever;
import android.media.MediaPlayer;
import android.media.MediaScannerConnection;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private MediaPlayer mediaPlayer;
private ImageView nextIv,playIv,lastIv,albumIv; //图像控件:
private TextView singerTv,songTv; //文本信息:歌手名、歌名
private RecyclerView musicRv; //类似ListView 可横向滚动
private SeekBar seekBar;
private TextView tv_star, tv_end;
private List<LocalMusicBean> mDatas; //数据源 自定义类数组 存放各歌曲信息
private LocalMusicAdapter adapter; //歌曲横条信息控件设置
private int currnetPlayPosition = -1; //记录当前正在播放的音乐的位置
private int currentPausePositionInSong = 0; //记录暂停音乐时进度条的位置
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate( savedInstanceState );
setContentView( R.layout.activity_main );
initView(); //控件定义与绑定 减少代码量
mediaPlayer = new MediaPlayer();
mDatas = new ArrayList<>(); //任意类型数组
//创建适配器对象
adapter = new LocalMusicAdapter(this, mDatas); //传参context,mDatas
musicRv.setAdapter(adapter);
//设置布局管理器
LinearLayoutManager layoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
musicRv.setLayoutManager(layoutManager);
//动态权限申请
if (ContextCompat.checkSelfPermission( MainActivity.this,
Manifest.permission.WRITE_APN_SETTINGS ) != PackageManager.PERMISSION_GRANTED) //判断是否已经授权
{
//申请权限 三个参数:1.Activity实例;2.String数组,存放权限;3.唯一请求码
ActivityCompat.requestPermissions( MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE,
Manifest.permission.READ_EXTERNAL_STORAGE}, 1 );
}else{
loadLocalMusicData(); //权限请求失败,则加载本地数据源,请求成功则调用回调函数中的加载,不管成功与否都会调用
}
// loadLocalMusicData(); //加载本地数据源
setEventListener(); //设置每一项的点击事件
}
//动态权限获取函数的回调函数
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult( requestCode, permissions, grantResults );
switch (requestCode) {
case 1:
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
loadLocalMusicData(); //申请权限成功,扫描模拟器存储,加载资源
} else {
finish();
Toast.makeText( this, "denied!", Toast.LENGTH_SHORT ).show();
}
}
}
private void loadLocalMusicData() {
/* 更新媒体库mp3文件*/
String file_path = "storage/emulated/0/Music";
MediaScannerConnection.scanFile( this,
new String[]{file_path.toString()},
// null,
new String[]{"mp3"},
new MediaScannerConnection.OnScanCompletedListener() {
@Override
public void onScanCompleted(String path, Uri uri) {
Log.i( "ExternalStorage", "Scanned" + path + ":" );
Log.i( "ExternalStorage", "->" + uri);
}
} );
/* 加载本地存储当中的音乐mp3文件到集合当中*/
// 1.获取ContentResolver对象
ContentResolver resolver = getContentResolver();
// 2.获取本地音乐存储的Uri地址
Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
// 3 开始查询地址 查询接口
Cursor cursor = resolver.query(uri, null, null, null, null);
// 4.遍历Cursor
int id = 0;
while (cursor.moveToNext()) {
String song = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.TITLE)); //歌曲标题
String singer = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ARTIST)); //歌手名
String album = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ALBUM)); //专辑名
id++;
String sid = String.valueOf(id); //序列号
String path = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DATA)); //路径
long duration = cursor.getLong(cursor.getColumnIndex(MediaStore.Audio.Media.DURATION)); //视频时长
SimpleDateFormat sdf = new SimpleDateFormat("mm:ss");
String time = sdf.format(new Date(duration));
// 获取专辑图片主要是通过album_id进行查询
String album_id = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ALBUM_ID));//相册名
String albumArt = getAlbumArt(album_id);
// 将一行当中的数据封装到对象当中
LocalMusicBean bean = new LocalMusicBean(sid, song, singer, album, time, path, albumArt); //每一首歌的信息封装
mDatas.add(bean);
}
// 数据源变化,提示适配器更新
adapter.notifyDataSetChanged();
}
private void initView() {
/* 初始化控件的函数*/
nextIv = findViewById(R.id.local_music_bottom_iv_next);
playIv = findViewById(R.id.local_music_bottom_iv_play);
lastIv = findViewById(R.id.local_music_bottom_iv_last);
albumIv = findViewById(R.id.local_music_bottom_iv_icon);
singerTv = findViewById(R.id.local_music_bottom_tv_singer);
songTv = findViewById(R.id.local_music_bottom_tv_song);
musicRv = findViewById(R.id.local_music_rv);
nextIv.setOnClickListener(this);
lastIv.setOnClickListener(this);
playIv.setOnClickListener(this);
seekBar = findViewById( R.id.local_music_bottom_tv_time ); //进度条定义
tv_star = findViewById( R.id.local_music_bottom_tv_time_star );
tv_end = findViewById( R.id.local_music_bottom_tv_time_end );
}
private void setEventListener() {
/* 设置每一项的点击事件*/
adapter.setOnItemClickListener(new LocalMusicAdapter.OnItemClickListener() {
@Override
public void OnItemClick(View view, int position) {
currnetPlayPosition = position;
LocalMusicBean musicBean = mDatas.get(position);
playMusicInMusicBean(musicBean);
}
});
}
public void playMusicInMusicBean(LocalMusicBean musicBean) { //传入一首歌 信息
/*根据传入对象播放音乐*/
//设置底部显示的歌手名称和歌曲名
singerTv.setText(musicBean.getSinger()); //获取当前信息并设置
songTv.setText(musicBean.getSong());
stopMusic();
// 重置多媒体播放器
mediaPlayer.reset();
// 设置新的播放路径
try {
mediaPlayer.setDataSource(musicBean.getPath());
String albumArt = musicBean.getAlbumArt();
Log.i("lsh123", "playMusicInMusicBean: albumpath=="+albumArt);
Bitmap bm = BitmapFactory.decodeFile(albumArt);
Log.i("lsh123", "playMusicInMusicBean: bm=="+bm);
albumIv.setImageBitmap(bm);
playMusic();
SeekBarSet(); //设置进度条及其时间显示
loadCover(musicBean.getPath());
} catch (Exception e) {
e.printStackTrace();
}
}
private void SeekBarSet(){
/*新增seekbar进度条*/
int duration = mediaPlayer.getDuration(); //获取视频总时间
seekBar.setMax( duration ); //将音乐总时间设置为Seekbar的最大值
Timer timer = new Timer( );
timer.schedule( new TimerTask() {
@Override
public void run() {
// if (!currentPausePositionInSong){
seekBar.setProgress( mediaPlayer.getCurrentPosition() );
// }
}
},0,50);
seekBar.setOnSeekBarChangeListener( new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
int time_end = mediaPlayer.getDuration() / 1000 ; //获取视频时长
tv_end.setText(calaculateTime( time_end ));
int time_now = mediaPlayer.getCurrentPosition() / 1000;
tv_star.setText(calaculateTime( time_now ) );
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
mediaPlayer.seekTo( seekBar.getProgress() );
// tv_star.setText(formattime( mediaPlayer.getCurrentPosition() ));
}
} );
}
/*
* 点击播放按钮播放音乐,或者暂停从新播放
* 播放音乐有两种情况:
* 1.从暂停到播放
* 2.从停止到播放
* */
private void playMusic() {
/* 播放音乐的函数*/
if (mediaPlayer!=null&&!mediaPlayer.isPlaying()) {
if (currentPausePositionInSong == 0) { //如果已经停止播放
try {
mediaPlayer.prepare(); //重新准备播放
mediaPlayer.start();
} catch (Exception e) {
e.printStackTrace();
}
}else{
// 从暂停到播放
mediaPlayer.seekTo(currentPausePositionInSong);
mediaPlayer.start();
}
// playIv.setImageResource(R.mipmap.icon_pause);
}
}
private void pauseMusic() {
/* 暂停音乐的函数*/
if (mediaPlayer!=null&&mediaPlayer.isPlaying()) {
currentPausePositionInSong = mediaPlayer.getCurrentPosition(); //获取进度条
mediaPlayer.pause();
playIv.setImageResource(R.mipmap.icon_play);
}
}
private void stopMusic() {
/* 停止音乐的函数*/
if (mediaPlayer!=null) {
currentPausePositionInSong = 0;
mediaPlayer.pause(); //播放器暂停
mediaPlayer.seekTo(0); //调至0
mediaPlayer.stop(); //停止
playIv.setImageResource(R.mipmap.icon_play); //显示图标
}
}
@Override
protected void onDestroy() {
super.onDestroy();
stopMusic();
}
/*进度条时间换算与格式转变*/
//时间格式换算1
public String formattime(long time){
String min= (time/(1000*60))+"";
String second= (time%(1000*60)/1000)+"";
if(min.length()<2){
min = 0 + min;
}
if(second.length()<2){
second = 0 + second;
}
return min +":"+ second;
}
//时间格式换算2
public String calaculateTime(int time){
int minute, second;
if(time > 60){
minute = time / 60; //分钟取整
second = time % 60; //秒钟取余
//分钟再0~9
if(minute >= 0 && minute < 10){ //0x:0x
//判断秒
if(second >= 0 && second < 10){
return "0"+minute+":"+"0"+second;
}else {
return "0"+minute+":"+second;
}
}else {
//分钟大于10再判断秒
if(second >= 0 && second < 10){
return minute+":"+"0"+second;
}else {
return minute+":"+second;
}
}
}else if(time < 60){
second = time;
if(second >= 0 && second < 10){
return "00:"+"0"+second;
}else {
return "00:"+ second;
}
}
return null;
}
private String getAlbumArt(String album_id) {
String mUriAlbums = "content://media/external/audio/albums";
String[] projection = new String[]{"album_art"};
Cursor cur = this.getContentResolver().query(
Uri.parse(mUriAlbums + "/" + album_id),
projection, null, null, null);
String album_art = null;
if (cur.getCount() > 0 && cur.getColumnCount() > 0) {
cur.moveToNext();
album_art = cur.getString(0);
}
cur.close();
cur = null;
return album_art;
}
private void loadCover(String path){
MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
mediaMetadataRetriever.setDataSource( path );
byte[] cover = mediaMetadataRetriever.getEmbeddedPicture();
Bitmap bitmap = BitmapFactory.decodeByteArray( cover, 0, cover.length );
albumIv.setImageBitmap( bitmap );
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.local_music_bottom_iv_last: //上一首
if (currnetPlayPosition ==0) {
Toast.makeText(this,"已经是第一首了,没有上一曲!",Toast.LENGTH_SHORT).show();
return;
}
currnetPlayPosition = currnetPlayPosition-1; //序号索引-1
LocalMusicBean lastBean = mDatas.get(currnetPlayPosition); //从数组中获取上一首信息
playMusicInMusicBean(lastBean);
break;
case R.id.local_music_bottom_iv_next: //下一首
if (currnetPlayPosition ==mDatas.size()-1) {
Toast.makeText(this,"已经是最后一首了,没有下一曲!",Toast.LENGTH_SHORT).show();
return;
}
currnetPlayPosition = currnetPlayPosition+1;
LocalMusicBean nextBean = mDatas.get(currnetPlayPosition);
playMusicInMusicBean(nextBean);
break;
case R.id.local_music_bottom_iv_play:
if (currnetPlayPosition == -1) {
// 并没有选中要播放的音乐
Toast.makeText(this,"请选择想要播放的音乐",Toast.LENGTH_SHORT).show();
return;
}
if (mediaPlayer.isPlaying()) {
// 此时处于播放状态,需要暂停音乐
pauseMusic();
}else {
// 此时没有播放音乐,点击开始播放音乐
playMusic();
}
break;
}
}
}
[LocalMusicBean.java] 歌曲信息封装类,包含歌曲各信息
package com.example.musicplayer_2;
/**
* author : harrison
* e-mail : harrison.zfx@gmail.com
* data : zfx上午10:29
* version: 1.0
*/
public class LocalMusicBean {
private String id; //歌曲id
private String song; //歌曲名称
private String singer; //歌手名称
private String album; //专辑名称
private String duration; //歌曲时长
private String path; //歌曲路径
private String albumArt; //专辑地址
public LocalMusicBean() {
}
public LocalMusicBean(String id, String song, String singer, String album, String duration, String path, String albumArt) {
this.id = id;
this.song = song;
this.singer = singer;
this.album = album;
this.duration = duration;
this.path = path;
this.albumArt = albumArt;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getSong() {
return song;
}
public void setSong(String song) {
this.song = song;
}
public String getSinger() {
return singer;
}
public void setSinger(String singer) {
this.singer = singer;
}
public String getAlbum() {
return album;
}
public void setAlbum(String album) {
this.album = album;
}
public String getDuration() {
return duration;
}
public void setDuration(String duration) {
this.duration = duration;
}
public String getPath() {
return path;
}
public void setPath(String path) {
this.path = path;
}
public String getAlbumArt() {
return albumArt;
}
public void setAlbumArt(String albumArt) {
this.albumArt = albumArt;
}
}
[LocalMusicAdapter.java] 歌曲横向展示类
package com.example.musicplayer_2;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import java.util.List;
/**
* author : harrison
* e-mail : harrison.zfx@gmail.com
* data : zfx上午10:49
* version: 1.0
*/
public class LocalMusicAdapter extends RecyclerView.Adapter<LocalMusicAdapter.LocalMusicViewHolder>{
private Context context;
private List<LocalMusicBean>mDatas;
private OnItemClickListener onItemClickListener;
public void setOnItemClickListener(OnItemClickListener onItemClickListener) { //监听器参数传入
this.onItemClickListener = onItemClickListener;
}
public interface OnItemClickListener{
public void OnItemClick(View view,int position);
}
public LocalMusicAdapter(Context context, List<LocalMusicBean> mDatas) { //构造函数传入参数 context上下文,数据集
this.context = context;
this.mDatas = mDatas;
}
@NonNull
@Override
public LocalMusicViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(context).inflate(R.layout.item_local_music,parent,false);
LocalMusicViewHolder holder = new LocalMusicViewHolder(view);
return holder;
}
@Override
public void onBindViewHolder(@NonNull LocalMusicViewHolder holder, final int position) {
LocalMusicBean musicBean = mDatas.get(position);
holder.idTv.setText(musicBean.getId());
holder.songTv.setText(musicBean.getSong());
holder.singerTv.setText(musicBean.getSinger());
holder.albumTv.setText(musicBean.getAlbum());
holder.timeTv.setText(musicBean.getDuration());
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onItemClickListener.OnItemClick(v,position);
}
});
}
@Override
public int getItemCount() {
return mDatas.size();
}
class LocalMusicViewHolder extends RecyclerView.ViewHolder{
TextView idTv,songTv,singerTv,albumTv,timeTv;
public LocalMusicViewHolder(View itemView) {
super(itemView);
idTv = itemView.findViewById(R.id.item_local_music_num); //序号
songTv = itemView.findViewById(R.id.item_local_music_song); //歌名
singerTv = itemView.findViewById(R.id.item_local_music_singer); //歌手名
albumTv = itemView.findViewById(R.id.item_local_music_album); //专辑名
timeTv = itemView.findViewById(R.id.item_local_music_durtion); //时间
}
}
}
前端页面代码较长就不贴了,上表中已列清基本控件使用。
挣点积分,后续会上传GitHub,完整工程地址:https://download.csdn.net/download/Harrison509/12894922
本文地址:https://blog.csdn.net/Harrison509/article/details/108829887