实现下载功能的暂停，取消以及断点续传功能

app/src/main/assets/litepal.xml

@@ -2,7 +2,7 @@
 <litepal>
     <dbname value="SongList" />
 
-    <version value="16" />
+    <version value="23" />
 
     <list>
         <mapping class="com.example.musicplayer.entiy.OnlineSong" />
@@ -12,5 +12,7 @@
         <mapping class="com.example.musicplayer.entiy.HistorySong" />
         <mapping class="com.example.musicplayer.entiy.AlbumCollection" />
         <mapping class="com.example.musicplayer.entiy.DownloadSong" />
+        <mapping class="com.example.musicplayer.entiy.DownloadInfo"/>
+        <mapping class="com.example.musicplayer.entiy.Song"/>
     </list>
 </litepal>

app/src/main/java/com/example/musicplayer/adapter/DownloadingAdapter.java

@@ -6,10 +6,13 @@ import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.ImageView;
 import android.widget.SeekBar;
 import android.widget.TextView;
 
 import com.example.musicplayer.R;
+import com.example.musicplayer.callback.OnDeleteClickListener;
+import com.example.musicplayer.callback.OnItemClickListener;
 import com.example.musicplayer.entiy.DownloadInfo;
 import com.example.musicplayer.util.MediaUtil;
 
@@ -24,26 +27,41 @@ import java.util.List;
  */
 
 public class DownloadingAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
+
+
     private List<DownloadInfo> downloadInfoList;
+    private List<String> downloadSongId;
+
+    private OnItemClickListener onItemClickListener;
+    private OnDeleteClickListener onDeleteClickListener;
+
+    public void setOnDeleteClickListener(OnDeleteClickListener onDeleteClickListener){
+        this.onDeleteClickListener = onDeleteClickListener;
+    }
 
-    public DownloadingAdapter(List<DownloadInfo> downloadInfoList) {
+    public void setOnItemClickListener(OnItemClickListener onItemClickListener) {
+        this.onItemClickListener = onItemClickListener;
+    }
+
+    public DownloadingAdapter(List<DownloadInfo> downloadInfoList,List<String> downloadSongId) {
         this.downloadInfoList = downloadInfoList;
+        this.downloadSongId = downloadSongId;
     }
 
     class ViewHolder extends RecyclerView.ViewHolder {
         TextView songTv;
-        TextView currentSizeTv;
-        TextView totalSizeTv;
+        TextView sizeTv;
         SeekBar seekBar;
         View itemView;
+        ImageView canacleIv;
 
         public ViewHolder(@NonNull View itemView) {
             super(itemView);
             this.itemView = itemView;
             songTv = itemView.findViewById(R.id.songTv);
-            currentSizeTv = itemView.findViewById(R.id.currentSizeTv);
-            totalSizeTv = itemView.findViewById(R.id.totalSizeTv);
+            sizeTv = itemView.findViewById(R.id.sizeTv);
             seekBar = itemView.findViewById(R.id.seekBar);
+            canacleIv = itemView.findViewById(R.id.cancelIv);
         }
     }
 
@@ -57,17 +75,34 @@ public class DownloadingAdapter extends RecyclerView.Adapter<RecyclerView.ViewHo
         return viewHolder;
     }
 
-    @SuppressLint("SetTextI18n")
+    @SuppressLint({"SetTextI18n", "ClickableViewAccessibility"})
     @Override
     public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int i) {
         ViewHolder holder = (ViewHolder) viewHolder;
         if (downloadInfoList.size() == 0) return;
         DownloadInfo downloadInfo = downloadInfoList.get(i);
-        holder.itemView.setVisibility(downloadInfo.getProgress() == 100 ? View.GONE : View.VISIBLE);
         holder.songTv.setText(downloadInfo.getSongName());
-        holder.currentSizeTv.setText(MediaUtil.formatSize(downloadInfo.getCurrentSize()) + "M");
-        holder.totalSizeTv.setText(MediaUtil.formatSize(downloadInfo.getTotalSize()) + "M");
+        if (downloadSongId.size()!=0&&downloadSongId.get(0).equals(downloadInfo.getSongId())) {//如果当前歌曲正在下载
+            holder.sizeTv.setText(
+                    MediaUtil.formatSize(downloadInfo.getCurrentSize()) + "M"
+                            + " / "
+                            + MediaUtil.formatSize(downloadInfo.getTotalSize()) + "M");
+            holder.seekBar.setVisibility(View.VISIBLE);
+        }else {//当前歌曲并未下载
+            holder.sizeTv.setText(downloadInfo.getSinger());
+            holder.seekBar.setVisibility(View.GONE);
+        }
+        holder.seekBar.setOnTouchListener((view, motionEvent) -> true); //消费该事件，让seekBar不能拖动和点击
         holder.seekBar.setProgress(downloadInfo.getProgress());
+        //点击事件
+        holder.itemView.setOnClickListener(view -> {
+            if(!downloadSongId.get(0).equals(downloadInfo.getSongId())) holder.sizeTv.setText("正在获取歌曲大小");
+            onItemClickListener.onClick(i);
+        });
+        //取消
+        holder.canacleIv.setOnClickListener(view -> onDeleteClickListener.onClick(i));
+
+
     }
 
     @Override

app/src/main/java/com/example/musicplayer/app/Constant.java

@@ -13,11 +13,11 @@ public class Constant {
     public static final int TYPE_ALBUM_SONG = 3;
 
     //播放列表
-    public static final int LIST_TYPE_LOCAL = 0;   //本地列表
-    public static final int LIST_TYPE_ONLINE = 1;  //专辑列表
-    public static final int LIST_TYPE_LOVE = 2;    //我的收藏列表
-    public static final int LIST_TYPE_HISTORY = 3;  //最近播放列表
-    public static final int LIST_TYPE_DOWNLOAD = 4; //下载列表
+    public static final int LIST_TYPE_LOCAL = 1;   //本地列表
+    public static final int LIST_TYPE_ONLINE = 2;  //专辑列表
+    public static final int LIST_TYPE_LOVE = 3;    //我的收藏列表
+    public static final int LIST_TYPE_HISTORY = 4;  //最近播放列表
+    public static final int LIST_TYPE_DOWNLOAD = 5; //下载列表
 
     public static final int HISTORY_MAX_SIZE = 100;
 
@@ -68,9 +68,9 @@ public class Constant {
 
     //download
     public final static int TYPE_DOWNLOADING = 0;
-    public final static int TYPE_PAUSED = 1;
-    public final static int TYPE_CANCELED = 2;
-    public final static int TYPE_SUCCESS = 3;
-    public final static int TYPE_FAILED = 4;
+    public final static int TYPE_DOWNLOAD_PAUSED = 1;
+    public final static int TYPE_DOWNLOAD_CANCELED = 2;
+    public final static int TYPE_DOWNLOAD_SUCCESS = 3;
+    public final static int TYPE_DOWNLOAD_FAILED = 4;
     public final static int TYPE_DOWNLOADED = 5;
 }

app/src/main/java/com/example/musicplayer/download/DownloadTask.java

@@ -1,8 +1,6 @@
 package com.example.musicplayer.download;
 
 import android.os.AsyncTask;
-import android.os.Environment;
-import android.util.Log;
 
 
 import com.example.musicplayer.app.Api;
@@ -64,7 +62,7 @@ public class DownloadTask extends AsyncTask<DownloadInfo, DownloadInfo, Integer>
             }
             long contentLength = getContentLength(downloadUrl); //实际文件长度
             if (contentLength == 0) {
-                return TYPE_FAILED;
+                return TYPE_DOWNLOAD_FAILED;
             } else if (contentLength == downloadedLength) { //已下载
                 return TYPE_DOWNLOADED;
             }
@@ -87,9 +85,9 @@ public class DownloadTask extends AsyncTask<DownloadInfo, DownloadInfo, Integer>
                 int len;
                 while ((len = is.read(b)) != -1) {
                     if (isCanceled) {
-                        return TYPE_CANCELED;
+                        return TYPE_DOWNLOAD_CANCELED;
                     } else if (isPaused) {
-                        return TYPE_PAUSED;
+                        return TYPE_DOWNLOAD_PAUSED;
                     } else {
                         total += len;
                         saveFile.write(b, 0, len);
@@ -101,7 +99,7 @@ public class DownloadTask extends AsyncTask<DownloadInfo, DownloadInfo, Integer>
                     }
                 }
                 response.body().close();
-                return TYPE_SUCCESS;
+                return TYPE_DOWNLOAD_SUCCESS;
             }
         } catch (IOException e) {
             e.printStackTrace();
@@ -120,7 +118,7 @@ public class DownloadTask extends AsyncTask<DownloadInfo, DownloadInfo, Integer>
                 e.printStackTrace();
             }
         }
-        return TYPE_FAILED;
+        return TYPE_DOWNLOAD_FAILED;
     }
 
     @Override
@@ -136,16 +134,16 @@ public class DownloadTask extends AsyncTask<DownloadInfo, DownloadInfo, Integer>
     @Override
     protected void onPostExecute(Integer status) {
         switch (status) {
-            case TYPE_SUCCESS:
+            case TYPE_DOWNLOAD_SUCCESS:
                 mDownListener.onSuccess();
                 break;
-            case TYPE_FAILED:
+            case TYPE_DOWNLOAD_FAILED:
                 mDownListener.onFailed();
                 break;
-            case TYPE_PAUSED:
+            case TYPE_DOWNLOAD_PAUSED:
                 mDownListener.onPaused();
                 break;
-            case TYPE_CANCELED:
+            case TYPE_DOWNLOAD_CANCELED:
                 mDownListener.onCanceled();
                 break;
             case TYPE_DOWNLOADED:
@@ -163,7 +161,7 @@ public class DownloadTask extends AsyncTask<DownloadInfo, DownloadInfo, Integer>
         isCanceled = true;
     }
 
-    private long getContentLength(String downloadUrl) throws IOException {
+    public long getContentLength(String downloadUrl) throws IOException {
         OkHttpClient client = new OkHttpClient();
         Request request = new Request.Builder()
                 .url(downloadUrl)

app/src/main/java/com/example/musicplayer/entiy/DownloadInfo.java

@@ -1,5 +1,7 @@
 package com.example.musicplayer.entiy;
 
+import org.litepal.crud.LitePalSupport;
+
 /**
  * <pre>
  *     author : 残渊
@@ -8,60 +10,77 @@ package com.example.musicplayer.entiy;
  * </pre>
  */
 
-public class DownloadInfo {
+public class DownloadInfo extends LitePalSupport {
     private String songName;
+    private String singer;
     private String url;
     private String songId;
     private int progress;
     private long currentSize;
     private long totalSize;
+    private Song song;
 
-    public int getProgress() {
-        return progress;
+    public String getSongName() {
+        return songName;
     }
 
-    public long getCurrentSize() {
-        return currentSize;
+    public void setSongName(String songName) {
+        this.songName = songName;
     }
 
-    public long getTotalSize() {
-        return totalSize;
+    public String getSinger() {
+        return singer;
     }
 
-    public String getSongName() {
-        return songName;
+    public void setSinger(String singer) {
+        this.singer = singer;
     }
 
+    public String getUrl() {
+        return url;
+    }
 
-    public void setCurrentSize(long currentSize) {
-        this.currentSize = currentSize;
+    public void setUrl(String url) {
+        this.url = url;
+    }
+
+    public String getSongId() {
+        return songId;
+    }
+
+    public void setSongId(String songId) {
+        this.songId = songId;
+    }
+
+    public int getProgress() {
+        return progress;
     }
 
     public void setProgress(int progress) {
         this.progress = progress;
     }
 
-    public void setSongName(String songName) {
-        this.songName = songName;
+    public long getCurrentSize() {
+        return currentSize;
     }
 
-    public void setTotalSize(long totalSize) {
-        this.totalSize = totalSize;
+    public void setCurrentSize(long currentSize) {
+        this.currentSize = currentSize;
     }
 
-    public String getUrl() {
-        return url;
+    public long getTotalSize() {
+        return totalSize;
     }
 
-    public void setUrl(String url) {
-        this.url = url;
+    public void setTotalSize(long totalSize) {
+        this.totalSize = totalSize;
     }
 
-    public String getSongId() {
-        return songId;
+    public Song getSong() {
+        return song;
     }
 
-    public void setSongId(String songId) {
-        this.songId = songId;
+    public void setSong(Song song) {
+        this.song = song;
     }
 }

app/src/main/java/com/example/musicplayer/entiy/HistorySong.java

@@ -17,6 +17,7 @@ public class HistorySong extends LitePalSupport {
     private String pic;
     private long duration;
     private boolean isOnline;
+    private boolean isDownload;
 
 
 
@@ -100,4 +101,12 @@ public class HistorySong extends LitePalSupport {
     public void setMediaId(String mediaId) {
         this.mediaId = mediaId;
     }
+
+    public void setDownload(boolean download) {
+        isDownload = download;
+    }
+
+    public boolean isDownload() {
+        return isDownload;
+    }
 }

app/src/main/java/com/example/musicplayer/entiy/Love.java

@@ -17,6 +17,7 @@ public class Love extends LitePalSupport{
     private String pic;
     private long duration;
     private boolean isOnline;
+    private boolean isDownload;
 
 
     public int getId() {
@@ -99,4 +100,12 @@ public class Love extends LitePalSupport{
     public void setMediaId(String mediaId) {
         this.mediaId = mediaId;
     }
+
+    public boolean isDownload() {
+        return isDownload;
+    }
+
+    public void setDownload(boolean download) {
+        isDownload = download;
+    }
 }

app/src/main/java/com/example/musicplayer/entiy/OnlineSong.java

@@ -17,6 +17,7 @@ public class OnlineSong extends LitePalSupport {
     private String pic;
     private String lrc;
     private long duration;
+    private boolean isDownload;
 
 
     public int getId() {
@@ -98,4 +99,12 @@ public class OnlineSong extends LitePalSupport {
     public void setMediaId(String mediaId) {
         this.mediaId = mediaId;
     }
+
+    public void setDownload(boolean download) {
+        isDownload = download;
+    }
+
+    public boolean isDownload() {
+        return isDownload;
+    }
 }

app/src/main/java/com/example/musicplayer/entiy/Song.java

@@ -1,12 +1,14 @@
 package com.example.musicplayer.entiy;
 
+import org.litepal.crud.LitePalSupport;
+
 import java.io.Serializable;
 
 /**
  * Created by 残渊 on 2018/10/19.
  */
 
-public class Song implements Serializable {
+public class Song extends LitePalSupport implements Serializable {
     private static final long serialVersionUID=1L;
 
     private String songId; //歌曲id
@@ -20,62 +22,88 @@ public class Song implements Serializable {
     private int current;//在音乐列表的位置
     private String imgUrl; //歌曲照片
     private boolean isOnline; //是否为网络歌曲
-    private int listType; //歌曲列表类别
+    private int listType; //歌曲列表类别,0表示当前没有列表，即可能在播放网络歌曲
+    private boolean isDownload;//是否为下载的歌曲
 
-    public String getImgUrl() {
-        return imgUrl;
+
+    public String getSongId() {
+        return songId;
     }
 
-    public int getCurrent() {
-        return current;
+    public void setSongId(String songId) {
+        this.songId = songId;
     }
 
-    public long getDuration() {
-        return duration;
+    public String getQqId() {
+        return qqId;
     }
 
-    public long getCurrentTime() {
-        return currentTime;
+    public void setQqId(String qqId) {
+        this.qqId = qqId;
     }
 
-    public String getUrl() {
-        return url;
+    public String getMediaId() {
+        return mediaId;
+    }
+
+    public void setMediaId(String mediaId) {
+        this.mediaId = mediaId;
     }
 
     public String getSinger() {
         return singer;
     }
 
+    public void setSinger(String singer) {
+        this.singer = singer;
+    }
+
+    public long getDuration() {
+        return duration;
+    }
+
+    public void setDuration(long duration) {
+        this.duration = duration;
+    }
+
     public String getSongName() {
         return songName;
     }
 
-    public void setImgUrl(String imgUrl) {
-        this.imgUrl = imgUrl;
+    public void setSongName(String songName) {
+        this.songName = songName;
     }
 
-    public void setCurrent(int current) {
-        this.current = current;
+    public String getUrl() {
+        return url;
+    }
+
+    public void setUrl(String url) {
+        this.url = url;
+    }
+
+    public long getCurrentTime() {
+        return currentTime;
     }
 
     public void setCurrentTime(long currentTime) {
         this.currentTime = currentTime;
     }
 
-    public void setDuration(long duration) {
-        this.duration = duration;
+    public int getCurrent() {
+        return current;
     }
 
-    public void setUrl(String url) {
-        this.url = url;
+    public void setCurrent(int current) {
+        this.current = current;
     }
 
-    public void setSinger(String singer) {
-        this.singer = singer;
+    public String getImgUrl() {
+        return imgUrl;
     }
 
-    public void setSongName(String songName) {
-        this.songName = songName;
+    public void setImgUrl(String imgUrl) {
+        this.imgUrl = imgUrl;
     }
 
     public boolean isOnline() {
@@ -94,28 +122,12 @@ public class Song implements Serializable {
         this.listType = listType;
     }
 
-    public String getSongId() {
-        return songId;
-    }
-
-    public void setSongId(String songId) {
-        this.songId = songId;
-    }
-
-    public String getQqId() {
-        return qqId;
-    }
-
-    public void setQqId(String qqId) {
-        this.qqId = qqId;
+    public boolean isDownload() {
+        return isDownload;
     }
 
-    public String getMediaId() {
-        return mediaId;
-    }
-
-    public void setMediaId(String mediaId) {
-        this.mediaId = mediaId;
+    public void setDownload(boolean download) {
+        isDownload = download;
     }
 
     public String toString(){

app/src/main/java/com/example/musicplayer/event/SongListNumEvent.java

@@ -0,0 +1,24 @@
+package com.example.musicplayer.event;
+
+/**
+ * <pre>
+ *     author : 残渊
+ *     time   : 2019/09/20
+ *     desc   : 歌曲列表数量变化消息
+ * </pre>
+ */
+
+public class SongListNumEvent {
+    private int type;
+    public SongListNumEvent(int type){
+        this.type = type;
+    }
+
+    public int getType() {
+        return type;
+    }
+
+    public void setType(int type) {
+        this.type = type;
+    }
+}

app/src/main/java/com/example/musicplayer/model/db/DbHelperImpl.java

@@ -120,6 +120,7 @@ public class DbHelperImpl implements DbHelper {
         love.setOnline(song.isOnline());
         love.setQqId(song.getQqId());
         love.setMediaId(song.getMediaId());
+        love.setDownload(song.isDownload());
         return love.save();
     }
 

app/src/main/java/com/example/musicplayer/presenter/LocalPresenter.java

@@ -1,9 +1,11 @@
 package com.example.musicplayer.presenter;
 
 
+import com.example.musicplayer.app.Constant;
 import com.example.musicplayer.base.presenter.BasePresenter;
 import com.example.musicplayer.contract.ILocalContract;
 import com.example.musicplayer.entiy.LocalSong;
+import com.example.musicplayer.event.SongListNumEvent;
 import com.example.musicplayer.event.SongLocalSizeChangeEvent;
 
 import org.greenrobot.eventbus.EventBus;
@@ -30,7 +32,7 @@ public class LocalPresenter extends BasePresenter<ILocalContract.View> implement
     @Override
     public void saveSong(List<LocalSong> localSongs) {
         if(mModel.saveSong(localSongs)) {
-            EventBus.getDefault().post(new SongLocalSizeChangeEvent());
+            EventBus.getDefault().post(new SongListNumEvent(Constant.LIST_TYPE_LOCAL));
             mView.showToast("成功导入本地音乐");
             mView.showMusicList(localSongs);
         }

app/src/main/java/com/example/musicplayer/service/DownloadService.java

@@ -24,10 +24,13 @@ import com.example.musicplayer.entiy.DownloadInfo;
 import com.example.musicplayer.entiy.DownloadSong;
 import com.example.musicplayer.entiy.Song;
 import com.example.musicplayer.event.DownloadEvent;
+import com.example.musicplayer.event.SongDownloadedEvent;
+import com.example.musicplayer.event.SongListNumEvent;
 import com.example.musicplayer.util.CommonUtil;
 import com.example.musicplayer.view.MainActivity;
 
 import org.greenrobot.eventbus.EventBus;
+import org.litepal.LitePal;
 
 import java.io.File;
 import java.util.HashMap;
@@ -48,7 +51,6 @@ public class DownloadService extends Service {
     private DownloadTask downloadTask;
     private String downloadUrl;
     private DownloadBinder downloadBinder = new DownloadBinder();
-    private HashMap<String, Song> downloadingMap = new HashMap<>();
     private LinkedList<Song> downloadQueue = new LinkedList<>();//等待队列
     private DownloadListener listener = new DownloadListener() {
         @Override
@@ -60,8 +62,7 @@ public class DownloadService extends Service {
         @Override
         public void onSuccess() {
             downloadTask = null;
-            saveToDb(); //下载成功，则保存数据到数据库
-            EventBus.getDefault().post(new DownloadEvent(Constant.TYPE_SUCCESS));//通知已下载列表
+            saveToDb(); //下载成功，则保存数据到数据库，顺便从下载数据库中移除
             start();//下载队列中的其它歌曲
             //下载成功通知前台服务通知关闭，并创建一个下载成功的通知
             stopForeground(true);
@@ -77,6 +78,7 @@ public class DownloadService extends Service {
         @Override
         public void onFailed() {
             downloadTask = null;
+
             //下载失败通知前台服务通知关闭，并创建一个下载失败的通知
             stopForeground(true);
             getNotificationManager().notify(1, getNotification("下载失败", -1));
@@ -86,6 +88,9 @@ public class DownloadService extends Service {
         @Override
         public void onPaused() {
             downloadTask = null;
+            downloadQueue.poll();//从下载列表中移除该歌曲
+            start();//下载下载列表中的歌曲
+            EventBus.getDefault().post(new DownloadEvent(Constant.TYPE_DOWNLOAD_PAUSED)); //下载暂停
             Toast.makeText(DownloadService.this, "下载已暂停", Toast.LENGTH_SHORT).show();
         }
 
@@ -106,6 +111,12 @@ public class DownloadService extends Service {
     public class DownloadBinder extends Binder {
         public void startDownload(Song song) {
             downloadQueue.offer(song);//将歌曲放到等待队列中
+            try {
+                postDownloadEvent(song);//通知正在下载界面
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+
             if (downloadTask != null) {
                 CommonUtil.showToast(DownloadService.this, "已经加入下载队列");
             } else {
@@ -120,16 +131,30 @@ public class DownloadService extends Service {
             }
         }
 
-        public void cancelDownload() {
-            if (downloadTask != null) {
+        public void resumeDownload() {
+            start();
+        }
+
+        public void cancelDownload(String downloadUrl,String songId) {
+            //如果该歌曲正在下载，则需要将downloadTask置为null
+            if (downloadTask != null&&downloadQueue.peek().getSongId().equals(songId)) {
                 downloadTask.cancelDownload();
-            } else {
-                if (downloadUrl != null) {
+            }
+            //将该歌曲从下载队列中移除
+            for (int i = 0; i < downloadQueue.size(); i++) {
+                Song song = downloadQueue.get(i);
+                if(song.getSongId().equals(songId)) downloadQueue.remove(i);
+            }
+            //将该歌曲从正在下载的数据库中移除
+            LitePal.deleteAll(DownloadInfo.class, "songId=?", songId);//删除已下载歌曲的相关列
+            //通知正在下载列表
+            EventBus.getDefault().post(new DownloadEvent(Constant.TYPE_DOWNLOAD_CANCELED));
             //取消下载需要将文件删除并将通知关闭
+            if (downloadUrl != null) {
                 String fileName = downloadUrl.substring(downloadUrl.lastIndexOf("/") + 1, downloadUrl.indexOf("?"));
                 File downloadFile = new File(Api.STORAGE_SONG_FILE);
                 String directory = String.valueOf(downloadFile);
-                    File file = new File(fileName + directory);
+                File file = new File(fileName ,directory);
                 if (file.exists()) {
                     file.delete();
                 }
@@ -137,8 +162,9 @@ public class DownloadService extends Service {
                 stopForeground(true);
                 Toast.makeText(DownloadService.this, "下载已取消", Toast.LENGTH_SHORT).show();
             }
+
         }
-        }
+
 }
 
     private void start() {
@@ -148,6 +174,8 @@ public class DownloadService extends Service {
             downloadInfo.setSongId(song.getSongId());
             downloadInfo.setUrl(song.getUrl());
             downloadInfo.setSongName(song.getSongName());
+            downloadInfo.setSinger(song.getSinger());
+            downloadInfo.setSong(song);
             downloadUrl = song.getUrl();
             downloadTask = new DownloadTask(listener);
             downloadTask.execute(downloadInfo);
@@ -193,6 +221,8 @@ public class DownloadService extends Service {
 
     private void saveToDb() {
         Song song = downloadQueue.poll();
+        LitePal.deleteAll(DownloadInfo.class, "songId=?", song.getSongId());//删除已下载歌曲的相关列
+        LitePal.deleteAll(Song.class, "songId=?", song.getSongId());//删除已下载歌曲的关联表中的相关列
         DownloadSong downloadSong = new DownloadSong();
         downloadSong.setName(song.getSongName());
         downloadSong.setSongId(song.getSongId());
@@ -202,5 +232,19 @@ public class DownloadService extends Service {
         downloadSong.setMediaId(song.getMediaId());
         downloadSong.setUrl(Api.STORAGE_SONG_FILE + "C400" + song.getMediaId() + ".m4a");
         downloadSong.save();
+        EventBus.getDefault().post(new DownloadEvent(Constant.TYPE_DOWNLOAD_SUCCESS));//通知已下载列表
+        EventBus.getDefault().post(new SongListNumEvent(Constant.LIST_TYPE_DOWNLOAD)); //通知主界面的下载个数需要改变
+    }
+
+    private void postDownloadEvent(Song song) {
+        DownloadInfo downloadInfo = new DownloadInfo();
+        downloadInfo.setSongName(song.getSongName());
+        downloadInfo.setSongId(song.getSongId());
+        downloadInfo.setUrl(song.getUrl());
+        downloadInfo.setProgress(0);
+        downloadInfo.setSinger(song.getSinger());
+        downloadInfo.setSong(song);
+        song.save();
+        downloadInfo.save();
     }
 }

app/src/main/java/com/example/musicplayer/service/PlayerService.java

@@ -23,6 +23,7 @@ import com.example.musicplayer.event.SongAlbumEvent;
 import com.example.musicplayer.event.SongCollectionEvent;
 import com.example.musicplayer.event.SongDownloadedEvent;
 import com.example.musicplayer.event.SongHistoryEvent;
+import com.example.musicplayer.event.SongListNumEvent;
 import com.example.musicplayer.event.SongLocalEvent;
 import com.example.musicplayer.event.SongStatusEvent;
 import com.example.musicplayer.model.https.RetrofitFactory;
@@ -103,7 +104,11 @@ public class PlayerService extends Service {
                 mCurrent=getNextCurrent(mCurrent, mPlayMode, mDownloadList.size());//根据播放模式来播放下一曲
                 saveDownloadInfo(mCurrent);
             }
+            if(mListType!=0) {
                 mPlayStatusBinder.play(mListType);
+            }else {
+                mPlayStatusBinder.stop();
+            }
         });
         /**
          * MediaPlayer切歌进入setOnCompletionListener的问题
@@ -237,7 +242,7 @@ public class PlayerService extends Service {
                 mCurrent=getNextCurrent(mCurrent, mPlayMode, mDownloadList.size());//根据播放模式来播放下一曲
                 saveDownloadInfo(mCurrent);
             }
-            mPlayStatusBinder.play(mListType);
+            if(mListType!=0) mPlayStatusBinder.play(mListType);
         }
 
         public void last() {
@@ -259,7 +264,7 @@ public class PlayerService extends Service {
                 mCurrent = getLastCurrent(mCurrent,mPlayMode,mDownloadList.size());
                 saveDownloadInfo(mCurrent);
             }
-            mPlayStatusBinder.play(mListType);
+            if(mListType!=0) mPlayStatusBinder.play(mListType);
         }
 
         /**
@@ -362,6 +367,7 @@ public class PlayerService extends Service {
         song.setOnline(love.isOnline());
         song.setDuration(love.getDuration());
         song.setMediaId(love.getMediaId());
+        song.setDownload(love.isDownload());
         FileUtil.saveSong(song);
     }
 
@@ -380,6 +386,7 @@ public class PlayerService extends Service {
         song.setOnline(false);
         song.setDuration(downloadSong.getDuration());
         song.setMediaId(downloadSong.getMediaId());
+        song.setDownload(true);
         FileUtil.saveSong(song);
     }
 
@@ -398,6 +405,7 @@ public class PlayerService extends Service {
         song.setOnline(historySong.isOnline());
         song.setDuration(historySong.getDuration());
         song.setMediaId(historySong.getMediaId());
+        song.setDownload(historySong.isDownload());
         FileUtil.saveSong(song);
     }
 
@@ -422,10 +430,13 @@ public class PlayerService extends Service {
                         history.setOnline(song.isOnline());
                         history.setDuration(song.getDuration());
                         history.setMediaId(song.getMediaId());
+                        history.setDownload(song.isDownload());
                         history.saveAsync().listen(new SaveCallback() {
                             @Override
                             public void onFinish(boolean success) {
                                 if (success) {
+                                    //告诉主界面最近播放的数目需要改变
+                                    EventBus.getDefault().post(new SongListNumEvent(Constant.LIST_TYPE_HISTORY));
                                     if (LitePal.findAll(HistorySong.class).size() > Constant.HISTORY_MAX_SIZE) {
                                         LitePal.delete(HistorySong.class, LitePal.findFirst(HistorySong.class).getId());
                                     }

app/src/main/java/com/example/musicplayer/view/PlayActivity.java

@@ -43,9 +43,10 @@ import com.example.musicplayer.app.Api;
 import com.example.musicplayer.app.Constant;
 import com.example.musicplayer.base.activity.BaseMvpActivity;
 import com.example.musicplayer.contract.IPlayContract;
-import com.example.musicplayer.entiy.DownloadInfo;
+import com.example.musicplayer.entiy.DownloadSong;
 import com.example.musicplayer.entiy.LocalSong;
 import com.example.musicplayer.entiy.Song;
+import com.example.musicplayer.event.DownloadEvent;
 import com.example.musicplayer.event.SongCollectionEvent;
 import com.example.musicplayer.event.SongStatusEvent;
 import com.example.musicplayer.presenter.PlayPresenter;
@@ -64,18 +65,11 @@ import com.example.musicplayer.widget.LrcView;
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
 import org.greenrobot.eventbus.ThreadMode;
+import org.litepal.LitePal;
 
-import java.io.BufferedOutputStream;
-import java.io.File;
-import java.io.FileOutputStream;
-import java.io.IOException;
 import java.util.List;
 
 import butterknife.BindView;
-import okhttp3.Connection;
-import okhttp3.OkHttpClient;
-import okhttp3.Request;
-import okhttp3.Response;
 
 /**
  * 播放界面
@@ -239,6 +233,7 @@ public class PlayActivity extends BaseMvpActivity<PlayPresenter> implements IPla
         mSeekBar.setMax((int) mSong.getDuration());
         mSeekBar.setProgress((int) mSong.getCurrentTime());
         mDownLoadIv.setVisibility(mSong.isOnline() ? View.VISIBLE : View.GONE); //下载按钮是否隐藏
+        mDownLoadIv.setImageDrawable(mSong.isDownload() ? getDrawable(R.drawable.downloaded) : getDrawable(R.drawable.download_song));
 
         mPlayMode = mPresenter.getPlayMode();//得到播放模式
         if (mPlayMode == Constant.PLAY_ORDER) {
@@ -252,6 +247,17 @@ public class PlayActivity extends BaseMvpActivity<PlayPresenter> implements IPla
 
     }
 
+
+    @Subscribe(threadMode = ThreadMode.MAIN)
+    public void onDownloadSuccessEvent(DownloadEvent event){
+        if(event.getDownloadStatus() == Constant.TYPE_DOWNLOAD_SUCCESS){
+            mDownLoadIv.setImageDrawable(
+                    LitePal.where("songId=?", mSong.getSongId()).find(DownloadSong.class).size() != 0
+                            ? getDrawable(R.drawable.downloaded)
+                            : getDrawable(R.drawable.download_song));
+        }
+    }
+
     @Override
     protected PlayPresenter getPresenter() {
         //与Presenter建立关系
@@ -441,7 +447,11 @@ public class PlayActivity extends BaseMvpActivity<PlayPresenter> implements IPla
         });
         //歌曲下载
         mDownLoadIv.setOnClickListener(v -> {
+            if (mSong.isDownload()) {
+                showToast(getString(R.string.downloded));
+            } else {
                 mDownloadBinder.startDownload(mSong);
+            }
         });
 
     }

app/src/main/java/com/example/musicplayer/view/main/MainFragment.java

@@ -21,6 +21,7 @@ import com.example.musicplayer.entiy.LocalSong;
 import com.example.musicplayer.entiy.Love;
 import com.example.musicplayer.event.AlbumCollectionEvent;
 import com.example.musicplayer.event.DownloadEvent;
+import com.example.musicplayer.event.SongListNumEvent;
 import com.example.musicplayer.event.SongLocalSizeChangeEvent;
 import com.example.musicplayer.view.main.collection.CollectionFragment;
 import com.example.musicplayer.view.main.download.DownloadFragment;
@@ -126,18 +127,19 @@ public class MainFragment extends Fragment {
     }
 
     @Subscribe(threadMode = ThreadMode.MAIN)
-    public void onLocalSizeEvent(SongLocalSizeChangeEvent event) {
+    public void onSongListEvent(SongListNumEvent event){
+        int type = event.getType();
+        if(type == Constant.LIST_TYPE_HISTORY){
+            mHistoryMusicNum.setText(String.valueOf(LitePal.findAll(HistorySong.class).size()));
+        }else if(type == Constant.LIST_TYPE_LOCAL){
             mLocalMusicNum.setText(String.valueOf(LitePal.findAll(LocalSong.class).size()));
-    }
-
-    @Subscribe(threadMode = ThreadMode.MAIN,sticky = true)
-    public void onDownloadSuccessEvent(DownloadEvent event){
-        if(event.getDownloadStatus() == Constant.TYPE_SUCCESS){
+        }else if(type == Constant.LIST_TYPE_DOWNLOAD){
             mDownloadMusicNum.setText(String.valueOf(LitePal.findAll(DownloadSong.class).size()));
         }
     }
 
 
+
     private void onClick() {
         //本地音乐
         mLocalMusicLinear.setOnClickListener(v -> replaceFragment(new LocalFragment()));

app/src/main/java/com/example/musicplayer/view/main/download/DownloadMusicFragment.java

@@ -11,7 +11,6 @@ import android.support.annotation.Nullable;
 import android.support.v4.app.Fragment;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
-import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -19,9 +18,7 @@ import android.view.ViewGroup;
 import com.example.musicplayer.R;
 import com.example.musicplayer.adapter.DownloadSongAdapter;
 import com.example.musicplayer.app.Constant;
-import com.example.musicplayer.callback.OnItemClickListener;
 import com.example.musicplayer.entiy.DownloadSong;
-import com.example.musicplayer.entiy.Love;
 import com.example.musicplayer.entiy.Song;
 import com.example.musicplayer.event.DownloadEvent;
 import com.example.musicplayer.event.SongDownloadedEvent;
@@ -112,6 +109,7 @@ public class DownloadMusicFragment extends Fragment {
             song.setDuration(downloadSong.getDuration());
             song.setListType(Constant.LIST_TYPE_DOWNLOAD);
             song.setMediaId(downloadSong.getMediaId());
+            song.setDownload(true);
             FileUtil.saveSong(song);
 
             mPlayStatusBinder.play(Constant.LIST_TYPE_DOWNLOAD);
@@ -120,7 +118,7 @@ public class DownloadMusicFragment extends Fragment {
 
     @Subscribe(threadMode = ThreadMode.MAIN)
     public void onDownloadSuccessEvent(DownloadEvent event){
-        if(event.getDownloadStatus() == Constant.TYPE_SUCCESS){
+        if(event.getDownloadStatus() == Constant.TYPE_DOWNLOAD_SUCCESS){
             mDownloadSongList.clear();
             mDownloadSongList.addAll(orderList(LitePal.findAll(DownloadSong.class)));
             mAdapter.notifyDataSetChanged();

app/src/main/java/com/example/musicplayer/view/main/download/DownloadingFragment.java

@@ -1,6 +1,12 @@
 package com.example.musicplayer.view.main.download;
 
+import android.app.Dialog;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.ServiceConnection;
 import android.os.Bundle;
+import android.os.IBinder;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import android.support.v4.app.Fragment;
@@ -11,17 +17,23 @@ import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 
+import com.example.SpeedDialog.dialog.SpeedDialog;
+import com.example.SpeedDialog.listener.OnSelectClickListener;
 import com.example.musicplayer.R;
 import com.example.musicplayer.adapter.DownloadingAdapter;
 import com.example.musicplayer.app.Constant;
 import com.example.musicplayer.entiy.DownloadInfo;
 import com.example.musicplayer.event.DownloadEvent;
+import com.example.musicplayer.service.DownloadService;
 
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
 import org.greenrobot.eventbus.ThreadMode;
+import org.litepal.LitePal;
 
 import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.LinkedList;
 import java.util.List;
 
 import butterknife.BindView;
@@ -44,7 +56,24 @@ public class DownloadingFragment extends Fragment {
     Unbinder unbinder;
     private DownloadingAdapter mAdapter;
     private LinearLayoutManager mLinearLayoutManager;
-    private List<DownloadInfo> mDownloadInfoList;
+    private List<DownloadInfo> mDownloadInfoList;  //下载队列
+    private List<String> mDownloadSongId; //用来判断当前下载的歌曲
+    private HashMap<String,Integer> mSongPositionMap;//歌曲Id获取歌曲位置
+    private boolean isTouch;
+
+    private DownloadService.DownloadBinder mDownloadBinder;
+    //绑定下载服务
+    private ServiceConnection mDownloadConnection = new ServiceConnection() {
+        @Override
+        public void onServiceConnected(ComponentName componentName, IBinder iBinder) {
+            mDownloadBinder = (DownloadService.DownloadBinder) iBinder;
+        }
+
+        @Override
+        public void onServiceDisconnected(ComponentName componentName) {
+
+        }
+    };
 
     @Nullable
     @Override
@@ -52,7 +81,6 @@ public class DownloadingFragment extends Fragment {
         View view = inflater.inflate(R.layout.fragment_download_ing, container, false);
         EventBus.getDefault().register(this);
         unbinder = ButterKnife.bind(this, view);
-
         return view;
     }
 
@@ -60,29 +88,81 @@ public class DownloadingFragment extends Fragment {
     @Override
     public void onActivityCreated(@Nullable Bundle savedInstanceState) {
         initRecycler();
+        //绑定服务
+        Intent downIntent = new Intent(getActivity(), DownloadService.class);
+        getActivity().bindService(downIntent, mDownloadConnection, Context.BIND_AUTO_CREATE);
         super.onActivityCreated(savedInstanceState);
     }
 
     private void initRecycler() {
-        mDownloadInfoList = new ArrayList<>();
+        mDownloadInfoList = new LinkedList<>();
+        mDownloadSongId = new ArrayList<>();
+        mDownloadSongId.add("");
+        mDownloadInfoList.addAll(orderList(LitePal.findAll(DownloadInfo.class,true)));
+        songDowningRecycle.setItemAnimator(null);  //解决进度刷新闪屏问题
         mLinearLayoutManager = new LinearLayoutManager(getActivity());
-        mAdapter = new DownloadingAdapter(mDownloadInfoList);
+        mAdapter = new DownloadingAdapter(mDownloadInfoList,mDownloadSongId);
         songDowningRecycle.setLayoutManager(mLinearLayoutManager);
         songDowningRecycle.setAdapter(mAdapter);
 
+        //暂停
+        mAdapter.setOnItemClickListener(position -> {
+            DownloadInfo downloadInfo = mDownloadInfoList.get(position);
+            if(downloadInfo.getSongId().equals(mDownloadSongId.get(0))){
+                mDownloadBinder.pauseDownload();
+            }else {
+                mDownloadBinder.startDownload(mDownloadInfoList.get(position).getSong());
+            }
+        });
+
+        //取消下载
+        mAdapter.setOnDeleteClickListener(position -> {
+            SpeedDialog speedDialog = new SpeedDialog(getActivity(),SpeedDialog.SELECT_TYPE);
+            speedDialog.setTitle(getString(R.string.download_cancel))
+                    .setMessage(getString(R.string.download_cancel_message))
+                    .setSureText(getString(R.string.download_sure))
+                    .setSureClickListener(dialog -> {
+                        mDownloadBinder.cancelDownload(mDownloadInfoList.get(position).getUrl(),mDownloadInfoList.get(position).getSongId());
+                    })
+            .show();
+        });
 
     }
 
     @Subscribe(threadMode = ThreadMode.MAIN)
     public void onDownloadingMessage(DownloadEvent event) {
-
-        if (event.getDownloadStatus() == Constant.TYPE_DOWNLOADING) {
+        int status = event.getDownloadStatus();
+        if (status == Constant.TYPE_DOWNLOADING) {
+            mDownloadSongId.clear();
+            mDownloadSongId.add(event.getDownloadInfo().getSongId());
+            ((LinkedList)mDownloadInfoList).poll();
+            ((LinkedList)mDownloadInfoList).addFirst(event.getDownloadInfo());
+            mAdapter.notifyItemChanged(0);
+        }else if(status == Constant.TYPE_DOWNLOAD_SUCCESS){
+            mDownloadInfoList.clear();
+            mDownloadInfoList.addAll(orderList(LitePal.findAll(DownloadInfo.class,true)));
+            mAdapter.notifyDataSetChanged();
+        }else if(status == Constant.TYPE_DOWNLOAD_PAUSED){
+            mDownloadSongId.clear();
+            mDownloadSongId.add("");
+            mAdapter.notifyDataSetChanged();
+        }else if(status == Constant.TYPE_DOWNLOAD_CANCELED){
             mDownloadInfoList.clear();
-            mDownloadInfoList.add(event.getDownloadInfo());
+            mDownloadInfoList.addAll(orderList(LitePal.findAll(DownloadInfo.class,true)));
             mAdapter.notifyDataSetChanged();
         }
     }
 
+
+    private List<DownloadInfo> orderList(List<DownloadInfo> tempList){
+        List<DownloadInfo> downloadInfos=new ArrayList<>();
+        downloadInfos.clear();
+        for(int i=tempList.size()-1;i>=0;i--){
+            downloadInfos.add(tempList.get(i));
+        }
+        return downloadInfos;
+    }
+
     @Override
     public void onDestroyView() {
         super.onDestroyView();

app/src/main/java/com/example/musicplayer/view/search/AlbumSongFragment.java

@@ -23,6 +23,7 @@ import com.example.musicplayer.app.Constant;
 import com.example.musicplayer.base.fragment.BaseMvpFragment;
 import com.example.musicplayer.contract.IAlbumSongContract;
 import com.example.musicplayer.entiy.AlbumSong;
+import com.example.musicplayer.entiy.DownloadSong;
 import com.example.musicplayer.entiy.Song;
 import com.example.musicplayer.event.SongAlbumEvent;
 import com.example.musicplayer.presenter.AlbumSongPresenter;
@@ -197,6 +198,8 @@ public class AlbumSongFragment extends BaseMvpFragment<AlbumSongPresenter> imple
             song.setImgUrl(Api.ALBUM_PIC+dataBean.getAlbummid()+ Api.JPG);
             song.setUrl(null);
             song.setMediaId(dataBean.getStrMediaMid());
+            //判断是否已经下载
+            song.setDownload(LitePal.where("songId=?", dataBean.getSongmid()).find(DownloadSong.class).size() != 0);
             FileUtil.saveSong(song);
 
             mPlayStatusBinder.play(Constant.LIST_TYPE_ONLINE);

app/src/main/java/com/example/musicplayer/view/search/SearchContentFragment.java

@@ -20,6 +20,7 @@ import com.example.musicplayer.app.Constant;
 import com.example.musicplayer.base.fragment.BaseLoadingFragment;
 import com.example.musicplayer.contract.ISearchContentContract;
 import com.example.musicplayer.entiy.Album;
+import com.example.musicplayer.entiy.DownloadSong;
 import com.example.musicplayer.entiy.SearchSong;
 import com.example.musicplayer.entiy.Song;
 import com.example.musicplayer.event.OnlineSongChangeEvent;
@@ -34,6 +35,7 @@ import com.github.jdsjlzx.recyclerview.LRecyclerViewAdapter;
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
 import org.greenrobot.eventbus.ThreadMode;
+import org.litepal.LitePal;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -169,6 +171,7 @@ public class SearchContentFragment extends BaseLoadingFragment<SearchContentPres
             song.setDuration(dataBean.getInterval());
             song.setOnline(true);
             song.setMediaId(dataBean.getStrMediaMid());
+            song.setDownload(LitePal.where("songId=?", dataBean.getSongmid()).find(DownloadSong.class).size() != 0);
             FileUtil.saveSong(song);
             //网络获取歌曲地址
             mPresenter.getSongUrl(dataBean.getSongmid());

app/src/main/res/layout/recycler_downing_item.xml

@@ -18,7 +18,7 @@
         app:layout_constraintLeft_toLeftOf="parent"/>
 
     <TextView
-        android:id="@+id/currentSizeTv"
+        android:id="@+id/sizeTv"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:textColor="@color/short_white"
@@ -27,23 +27,6 @@
         app:layout_constraintLeft_toLeftOf="@+id/songTv"
         app:layout_constraintTop_toBottomOf="@+id/songTv"/>
 
-    <TextView
-        android:id="@+id/biasTv"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:textColor="@color/short_white"
-        android:text="@string/bias"
-        app:layout_constraintLeft_toRightOf="@+id/currentSizeTv"
-        app:layout_constraintTop_toTopOf="@+id/currentSizeTv"/>
-
-    <TextView
-        android:id="@+id/totalSizeTv"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:textColor="@color/short_white"
-        tools:text="5.7M"
-        app:layout_constraintLeft_toRightOf="@+id/biasTv"
-        app:layout_constraintTop_toTopOf="@+id/currentSizeTv"/>
 
 
 
@@ -55,10 +38,10 @@
         android:progressDrawable="@drawable/seekbar_bg"
         android:maxHeight="5dp"
         android:max="100"
-        app:layout_constraintLeft_toRightOf="@+id/totalSizeTv"
-        app:layout_constraintTop_toTopOf="@+id/totalSizeTv"
+        app:layout_constraintLeft_toRightOf="@+id/sizeTv"
+        app:layout_constraintTop_toTopOf="@+id/sizeTv"
         app:layout_constraintRight_toLeftOf="@id/cancelIv"
-        app:layout_constraintBottom_toBottomOf="@id/totalSizeTv"
+        app:layout_constraintBottom_toBottomOf="@id/sizeTv"
         />
 
     <ImageView
@@ -76,5 +59,5 @@
         android:layout_height="0.1dip"
         android:background="@color/gray"
         android:layout_marginTop="@dimen/dp_10"
-        app:layout_constraintTop_toBottomOf="@id/totalSizeTv"/>
+        app:layout_constraintTop_toBottomOf="@id/sizeTv"/>
 </android.support.constraint.ConstraintLayout>

app/src/main/res/values/strings.xml

@@ -51,6 +51,12 @@
     <string name="play_mode_single">单曲循环</string>
     <string name="bias">&#160;/&#160;</string>
 
+    //download
+    <string name="downloded">该歌曲已下载</string>
+    <string name="download_cancel">取消下载</string>
+    <string name="download_cancel_message">确定不再下载吗？</string>
+    <string name="download_sure">删除</string>
+
 
 
 </resources>