Android app内更新，兼容7.0

之前项目有需求做app内更新，试了很多都不行，最后自己结合网上找到的资料，自己写了一个工具类，兼容Android7.0，有问题的话欢迎留言。二话不说直接上代码吧

/**
* 2018-01-09 haoshiwei
* app内部更新的工具类
* 兼容7.0
*/
public class DownloadUtils {
//下载器
private DownloadManager downloadManager;
//上下文
private Context mContext;
//下载的ID
private long downloadId;
public DownloadUtils(Context context){
this.mContext = context;
}

//下载apk
public void downloadAPK(String url, String name) {

//创建下载任务
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
//移动网络情况下是否允许漫游
request.setAllowedOverRoaming(false);

//在通知栏中显示，默认就是显示的
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE);
request.setTitle("狐小狸");
request.setDescription("Apk Downloading");
request.setVisibleInDownloadsUi(true);

//设置下载的路径
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS , name);

//获取DownloadManager
downloadManager = (DownloadManager) mContext.getSystemService(Context.DOWNLOAD_SERVICE);
//将下载请求加入下载队列，加入下载队列后会给该任务返回一个long型的id，通过该id可以取消任务，重启任务、获取下载的文件等等
downloadId = downloadManager.enqueue(request);

//注册广播接收者，监听下载状态
mContext.registerReceiver(receiver,
new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
}

//广播监听下载的各个状态
private BroadcastReceiver receiver = 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();
//通过下载的id查找
query.setFilterById(downloadId);
Cursor c = downloadManager.query(query);
if (c.moveToFirst()) {
int status = c.getInt(c.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:
//下载完成安装APK
installAPK();
break;
//下载失败
case DownloadManager.STATUS_FAILED:
Toast.makeText(mContext, "下载失败", Toast.LENGTH_SHORT).show();
break;
}
}
c.close();
}

//下载到本地后执行安装private void installAPK() {//获取下载文件的UriUri downloadFileUri = downloadManager.getUriForDownloadedFile(downloadId);if (downloadFileUri != null) {Intent intent= new Intent(Intent.ACTION_VIEW);intent.setDataAndType(downloadFileUri, "application/vnd.android.package-archive");intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);mContext.startActivity(intent);mContext.unregisterReceiver(receiver);}}

}这里使用了Android自带的downloadManager，但是有一个 问题就是在Android7.0以上的手机不兼容。

/*** 7.0兼容*/private void installAPK() {File apkFile =new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), "huxiaoli.apk");Intent intent = new Intent(Intent.ACTION_VIEW);intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);if (Build.VERSION.SDK_INT >= 24) {Uri apkUri = FileProvider.getUriForFile(mContext, mContext.getPackageName() + ".provider", 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);}

这里我们在7.0以上的手机上使用file.provider要在manifest文件里面配置一下

<providerandroid:name="android.support.v4.content.FileProvider"android:authorities="你的包名.provider"android:exported="false"android:grantUriPermissions="true"><meta-dataandroid:name="android.support.FILE_PROVIDER_PATHS"android:resource="@xml/provider_paths"/></provider>

在drawable目录下创建xml包下面创建provider_paths文件

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

   这样就大功告成了，有问题的话欢迎留言