Android中DownloadManager实现文件下载实例详解

2024-02-27 09:48:04 47

Android中DownloadManager实现文件下载

下载

创建下载链接

DownloadManager.Requestrequest=newDownloadManager.Request(Uri.parse(url));

设置允许下载的网络环境

request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI);

WIFI网络:DownloadManager.Request.NETWORK_WIFI

移动网络:DownloadManager.Request.NETWORK_MOBILE

Notification显示下载进度

//在Notification显示下载进度
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE);
//设置Title
request.setTitle("更新");
//设置描述
request.setDescription("正在下载更新文件...");

设置保存路径

privatestaticfinalStringDIR="AutoUpdate";
privatestaticfinalStringAPK="MyHome.apk";
privatestaticfinalStringPATH=Environment.getExternalStorageDirectory().getAbsolutePath()+"/"+DIR+"/"+APK;

request.setDestinationInExternalPublicDir(DIR,APK);

下载

下载会返回一个进程ID

DownloadManagerdownloadManager=(DownloadManager)context.getSystemService(Context.DOWNLOAD_SERVICE);
longid=downloadManager.enqueue(request);

取消下载

通过ID可以需要下载

downloadManager.remove(id);

下载完成的监听

下载完成，系统会发出广播，通过注册广播监听者可以监听到下载完成

广播的Action为DownloadManager.ACTION_DOWNLOAD_COMPLETE

/**
*Broadcastintentactionsentbythedownloadmanagerwhentheuserclicksonarunning
*download,eitherfromasystemnotificationorfromthedownloadsUI.
*/
@SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
publicfinalstaticStringACTION_NOTIFICATION_CLICKED=
"android.intent.action.DOWNLOAD_NOTIFICATION_CLICKED";

Code

下载

DownloadManager.Requestrequest=newDownloadManager.Request(Uri.parse(url));
//WIFI状态下下载
request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI);
//设置通知栏
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE);
request.setTitle("更新");
request.setDescription("正在下载更新文件...");
//存放路径
request.setDestinationInExternalPublicDir(DIR,APK);

//开始下载
DownloadManagerdownloadManager=(DownloadManager)context.getSystemService(Context.DOWNLOAD_SERVICE);
longid=downloadManager.enqueue(request);

广播接收者

实现

packagecom.example.kongqingwei.downloadmanagerdemo;

importandroid.app.DownloadManager;
importandroid.content.BroadcastReceiver;
importandroid.content.Context;
importandroid.content.Intent;
importandroid.widget.Toast;

/**
*Createdbykongqingweion2016/12/19.
*广播接收者
*/
publicclassAutoUpdateBroadcastReceiverextendsBroadcastReceiver{
@Override
publicvoidonReceive(Contextcontext,Intentintent){
if(DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(intent.getAction())){
Toast.makeText(context,"下载完成",Toast.LENGTH_SHORT).show();
booleanisInstalled=AutoUpdater.installApk();
Toast.makeText(context,isInstalled?"安装成功":"安装失败",Toast.LENGTH_SHORT).show();
}
}
}

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Android中DownloadManager实现文件下载实例详解

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