Android中DownloadManager实现文件下载

下载

创建下载链接

DownloadManager.Request request = new DownloadManager.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

private static final String DIR = "AutoUpdate";

private static final String APK = "MyHome.apk";

private static final String PATH = Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + DIR + "/" + APK;

request.setDestinationInExternalPublicDir(DIR,APK);

下载

下载会返回一个进程ID

DownloadManager downloadManager = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);

long id = 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

/**

* Broadcast intent action sent by the download manager when the user clicks on a running

* download,either from a system notification or from the downloads UI.

*/

@SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)

public final static String ACTION_NOTIFICATION_CLICKED =

"android.intent.action.DOWNLOAD_NOTIFICATION_CLICKED";

Code

下载

DownloadManager.Request request = new DownloadManager.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

DownloadManager downloadManager = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);

long id = downloadManager.enqueue(request);

广播接收者

package="com.example.kongqingwei.downloadmanagerdemo">

android:allowBackup="true"

android:icon="@mipmap/ic_launcher"

android:label="@string/app_name"

android:supportsRtl="true"

android:theme="@style/AppTheme">

实现

package com.example.kongqingwei.downloadmanagerdemo;

import android.app.DownloadManager;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.widget.Toast;

/**

* Created by kongqingwei on 2016/12/19.

* 广播接收者

*/

public class AutoUpdateBroadcastReceiver extends BroadcastReceiver {

@Override

public void onReceive(Context context,Intent intent) {

if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(intent.getAction())) {

Toast.makeText(context,"下载完成",Toast.LENGTH_SHORT).show();

boolean isInstalled = AutoUpdater.installApk();

Toast.makeText(context,isInstalled ? "安装成功" : "安装失败",Toast.LENGTH_SHORT).show();

}

}

}

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