张萌&韩墨羽——使用MediaPlayer+Service完成音乐播放器

最新推荐文章于 2022-04-19 22:37:42 发布

Zephyr_0312

最新推荐文章于 2022-04-19 22:37:42 发布

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分类专栏：学习资料文章标签：安卓

本文链接：https://blog.youkuaiyun.com/Zephyr_0312/article/details/97426127

本文详细介绍了如何利用Android的MediaPlayer和Service组件来创建一个音乐播放器。包括封装歌曲类、查询本地歌曲、Adapter实现、布局设计以及Activity和服务的代码实现。

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使用MediaPlayer+Service完成音乐播放器

在这里插入图片描述
1,先把歌曲封装成一个类

package com.example.servicemusic;

public class Song {
    private String title;
    private String artist;
    private int duration;
    private String data;
    private int size;

    public Song(String title, String artist, int duration, String data, int size) {
        this.title = title;
        this.artist = artist;
        this.duration = duration;
        this.data = data;
        this.size = size;
    }

    public Song() {
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getArtist() {
        return artist;
    }

    public void setArtist(String artist) {
        this.artist = artist;
    }

    public int getDuration() {
        return duration;
    }

    public void setDuration(int duration) {
        this.duration = duration;
    }

    public String getData() {
        return data;
    }

    public void setData(String data) {
        this.data = data;
    }

    public int getSize() {
        return size;
    }

    public void setSize(int size) {
        this.size = size;
    }
}

2,封装查询本地歌曲的工具类

package com.example.servicemusic;

import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.provider.MediaStore;

import java.util.ArrayList;
import java.util.List;

public class Utils {
    private Context context;
    private List<Song> list;

    public Utils(Context context, List<Song> list) {
        this.context = context;
        this.list = list;
    }
    public static List<Song> init(Context context){
        List<Song> list=new ArrayList<>();
        //获取音乐的uri
        Uri uri= MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
        String[] strings={MediaStore.Audio.Media.TITLE,MediaStore.Audio.Media.ARTIST,MediaStore.Audio.Media.DURATION,MediaStore.Audio.Media.DATA,MediaStore.Audio.Media.SIZE};
        ContentResolver contentResolver = context.getContentResolver();
        Cursor cursor = contentResolver.query(uri, strings, null, null, null);
        while (cursor.moveToNext()){
        //获取音乐的歌名,作者,时长,地址
            String title = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.TITLE));
            String artist = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ARTIST));
            int duration = cursor.getInt(cursor.getColumnIndex(MediaStore.Audio.Media.DURATION));
            String data = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DATA));
            int size = cursor.getInt(cursor.getColumnIndex(MediaStore.Audio.Media.SIZE));

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