Android使用DownloadMange进行版本更新（兼容7.0）

1.简单实现

package com.dyb.testcamerademo;

import android.app.DownloadManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.support.v4.content.FileProvider;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.widget.Toast;

import java.io.File;

public class Main2Activity extends AppCompatActivity {
private Context mContext;
private DownloadManager mDownloadManager;
private long downloadId;
private boolean isForceUpdate = true;//是否强制升级

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
mContext = this;
initVersionUpdate();
}

private void initVersionUpdate() {
checkUpdate();
}

/**
* 检测软件更新
*/
public void checkUpdate() {
if (isUpdate()) {
// 显示提示对话框
showNoticeDialog();
} else {
Toast.makeText(mContext, "没有新版", Toast.LENGTH_LONG).show();
}
}

/**
* 显示软件更新对话框
*/
private void showNoticeDialog() {
// 更新
AlertDialog.Builder dialog = new AlertDialog.Builder(mContext);

dialog.setTitle("软件更新")
.setMessage("检测到新版本，立即更新吗")
.setPositiveButton("更新", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
Toast.makeText(mContext, "正在通知栏下载中", Toast.LENGTH_SHORT).show();

// 显示下载对话框
showDownloadDialog();
}
});
if (!isForceUpdate) {
dialog.setNegativeButton("下次再说", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});

}
dialog.setCancelable(false);
dialog.show();
}

/**
* 显示软件下载对话框
*/
private void showDownloadDialog() {
//安装包路径 此处模拟为百度新闻APP地址
String downPath = "http://gdown.baidu.com/data/wisegame/f98d235e39e29031/baiduxinwen.apk";

//使用系统下载类
mDownloadManager = (DownloadManager) mContext.getSystemService(DOWNLOAD_SERVICE);
Uri uri = Uri.parse(downPath);
DownloadManager.Request request = new DownloadManager.Request(uri);
request.setAllowedOverRoaming(false);

//创建目录下载
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "百度.apk");
// 把id保存好，在接收者里面要用
downloadId = mDownloadManager.enqueue(request);
//设置允许使用的网络类型，这里是移动网络和wifi都可以
request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_MOBILE | DownloadManager.Request.NETWORK_WIFI);
//机型适配
request.setMimeType("application/vnd.android.package-archive");
//通知栏显示
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setTitle("测试APP");
request.setDescription("正在下载中...");
request.setVisibleInDownloadsUi(true);
mContext.registerReceiver(mReceiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
}

/**
* 判断是否有更新，需要跟后台产生信息交互
*
* @return
*/
private boolean isUpdate() {
// 获取当前软件版本
int versionCode = getVersionCode(mContext);

// 调用方法获取服务器可用版本信息，此处模拟为大于当前版本的定值
int serviceCode = 2;

// 版本判断
if (serviceCode > versionCode) {
return true;
}
return false;
}

/**
* 获取本地软件版本号
*
* @param context
* @return
*/
private int getVersionCode(Context context) {
int versionCode = 0;
try {
// 获取软件版本号，对应AndroidManifest.xml下android:versionCode
versionCode = context.getPackageManager().getPackageInfo(context.getPackageName(), 0).versionCode;
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}
return versionCode;
}

private BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
checkStatus();
}
};

/**
* 检查下载状态
*/
private void checkStatus() {
DownloadManager.Query query = new DownloadManager.Query();
query.setFilterById(downloadId);
Cursor cursor = mDownloadManager.query(query);
if (cursor.moveToFirst()) {
int status = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS));
switch (status) {
//下载暂停
case DownloadManager.STATUS_PAUSED:
break;
//下载延迟
case DownloadManager.STATUS_PENDING:
break;
//正在下载
case DownloadManager.STATUS_RUNNING:
break;
//下载完成
case DownloadManager.STATUS_SUCCESSFUL:
installAPK();
break;
//下载失败
case DownloadManager.STATUS_FAILED:
Toast.makeText(mContext, "下载失败", Toast.LENGTH_SHORT).show();
break;
}
}
cursor.close();
}

/**
* 7.0兼容
*/
private void installAPK() {
File apkFile =
new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), "百度.apk");
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
Uri apkUri = FileProvider.getUriForFile(mContext, mContext.getPackageName() + ".fileprovider", apkFile);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.setDataAndType(apkUri, "application/vnd.android.package-archive");
} else {
intent.setDataAndType(Uri.fromFile(apkFile), "application/vnd.android.package-archive");
}
mContext.startActivity(intent);
}
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.dyb.testcamerademo">

<!-- sd卡写权限 -->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<!-- 网络 -->
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".Main2Activity">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>

<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>

<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.dyb.testcamerademo.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths"/>
</provider>

<activity android:name=".MainActivity">
</activity>
</application>

</manifest>

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">

<!--
name属性的值可以随便写,别名
path属性的值表示共享的具体位置，设置空就表示将整个SD卡进行共享
-->
<paths>
<external-path
name="camera_photos"
path=""/>
</paths>
</paths>