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Uri
    Uri 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

<provider
    android:name="android.support.v4.content.FileProvider"
    android:authorities="你的包名.provider"
    android:exported="false"
    android:grantUriPermissions="true">
    <meta-data
        android: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-path
            name="download"
            path=""/>
    </paths>
</resources>

   这样就大功告成了，有问题的话欢迎留言