基本信息
源码名称:Android使用Service文件下载
源码大小:14.19M
文件格式:.rar
开发语言:Java
更新时间:2021-11-15
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源码介绍
仅支持8.0以下系统
仅支持8.0以下系统
package cn.itcast.servicetest; import android.app.Notification; import android.app.NotificationChannel; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; import android.content.Intent; import android.graphics.BitmapFactory; import android.graphics.Color; import android.os.Binder; import android.os.Build; import android.os.Build.VERSION; import android.os.Environment; import android.os.FileObserver; import android.os.IBinder; import android.util.Log; import android.widget.Toast; import java.io.File; import androidx.core.app.NotificationBuilderWithBuilderAccessor; import androidx.core.app.NotificationCompat; public class DownloadService extends Service { private DownloadBinder mBinder = new DownloadBinder(); private static final String TAG = "DownloadService"; private DownloadTask downloadTask; private String downloadUrl; private DownloadListener listener = new DownloadListener() { @Override public void onProgress(int progress) { getNotificationManager().notify(1,getNotification("Downloading...",progress)); } @Override public void onSuccess() { Log.d(TAG,"onSuccess"); downloadTask = null; //下载成功前台服务关闭通知,创建一个下载成功的通知 stopForeground(true); getNotificationManager().notify(1,getNotification("Download Success",-1)); Toast.makeText(DownloadService.this,"下载成功",Toast.LENGTH_LONG).show(); } @Override public void onFailed() { Log.d(TAG,"onFailed"); downloadTask = null; stopForeground(true); getNotificationManager().notify(1,getNotification("Download Failed",-1)); Toast.makeText(DownloadService.this,"下载失败",Toast.LENGTH_LONG).show(); } @Override public void onPaused() { Log.d(TAG,"onPaused"); downloadTask =null; //Toast.makeText(DownloadService.this,"暂停",Toast.LENGTH_LONG).show(); } @Override public void onCanceled() { Log.d(TAG,"onCanceled"); downloadTask = null; stopForeground(true); Toast.makeText(DownloadService.this,"取消",Toast.LENGTH_LONG).show(); } }; class DownloadBinder extends Binder{ public void startDownload(String url){ if(downloadTask==null){ downloadUrl =url; downloadTask =new DownloadTask(listener); downloadTask.execute(downloadUrl); startForeground(1,getNotification("Downloading...",0)); Toast.makeText(DownloadService.this,"Downloading...",Toast.LENGTH_LONG).show(); } } public void pauseDownload(){ if(downloadTask!=null){ downloadTask.pauseDownload(); } } public void cancelDownload(){ if(downloadTask!=null){ downloadTask.cancelDownload(); }else{ if(downloadUrl!=null){ //取消下载时删除文件,关闭通知 String fileName = downloadUrl.substring(downloadUrl.lastIndexOf("/")); String directory = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).getPath(); File file = new File(directory fileName); if(file.exists()){ file.delete(); } getNotificationManager().cancel(1); stopForeground(true); //Toast.makeText(DownloadService.this,"取消",Toast.LENGTH_LONG).show(); } } } } public DownloadService() { } @Override public IBinder onBind(Intent intent) { return (IBinder) mBinder; } private NotificationManager getNotificationManager(){ return (NotificationManager)getSystemService(NOTIFICATION_SERVICE); } private Notification getNotification(String title,int progress){ Intent intent =new Intent(this,MainActivity.class); PendingIntent pi = PendingIntent.getActivity(this,0,intent,0); String CHANNEL_ONE_ID = "cn.itcast.servicetest"; String CHANNEL_ONE_NAME = "Channel One"; NotificationChannel notificationChannel = null; if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O){ notificationChannel = new NotificationChannel(CHANNEL_ONE_ID,CHANNEL_ONE_NAME,NotificationManager.IMPORTANCE_HIGH); notificationChannel.enableLights(true); notificationChannel.setLightColor(Color.RED); notificationChannel.setShowBadge(true); notificationChannel.setLockscreenVisibility(Notification.VISIBILITY_PUBLIC); NotificationManager manager = (NotificationManager)getSystemService(NOTIFICATION_SERVICE); manager.createNotificationChannel(notificationChannel); } NotificationCompat.Builder builder = new NotificationCompat.Builder(this).setChannelId(CHANNEL_ONE_ID); builder.setSmallIcon(R.mipmap.ic_launcher); builder.setLargeIcon(BitmapFactory.decodeResource(getResources(),R.mipmap.ic_launcher)); builder.setContentIntent(pi); builder.setContentTitle(title); if(progress>0){ //显示下载进度 builder.setContentText(progress "%"); builder.setProgress(100,progress,false); } return builder.build(); } }