以编程方式在Marshmallow上安装APK

Question

在我的一个用例中,应用程序在开始时联系服务器并下载同一应用程序的更新.

下载我正在使用Android的DownloadManager类.然后使用下面的代码,它尝试创建应用程序安装程序意图,onReceive()即成功下载APK后.

@Override
public void onReceive(Context context, Intent intent) {

    //check if the broadcast message is for our Enqueued download
    long referenceId = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1);
    if (downloadReference == referenceId) {
        try {
            Log.v("", "Downloading of the new app version complete");

            String filepath = Environment.getExternalStorageDirectory() + "/" +
                    Environment.DIRECTORY_DOWNLOADS + "/" + mLatestVersionFileName;

            //start the installation of the latest version
            Uri uri = downloadManager.getUriForDownloadedFile(downloadReference);

            //downloadManager.getUriForDownloadedFile(downloadReference)
            Uri fileLoc = Uri.fromFile(new File(filepath));

            Intent promptInstall = new Intent(Intent.ACTION_VIEW);
            promptInstall.setDataAndType(uri, "application/vnd.android.package-archive");
            promptInstall.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            startActivity(promptInstall);
        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}

该代码适用于Pre-Marshmallow设备,用户可以通过屏幕安装APK.

这不适用于Marshmallow设备.

我在Marshmallow上遇到以下异常:

android.content.ActivityNotFoundException:找不到处理Intent的Activity {act = android.intent.action.VIEW dat = content:// downloads/my_downloads/287 typ = application/vnd.android.package-archive flg = 0x10000000}

我试过以下事情:

1. 使用Marshmallow (com.google.android.packageinstaller/com.android.packageinstaller.PackageInstallerActivity)组件名称的确切PackageInstaller 作为Intent的一部分.
2. 传递fileLoc而不是uri.

promptInstall.setDataAndType(uri, "application/vnd.android.package-archive");

这导致'解析错误'.

理想情况下,Android OS会解决意图.我想这不是一个大问题,我可能在创建Intent时遗漏了一些东西.

Answer 1

试试这个

 public void onReceive(Context context, Intent intent) {
                String action = intent.getAction();
                if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action)) {
                    long downloadId = intent.getLongExtra(
                            DownloadManager.EXTRA_DOWNLOAD_ID, 0);
                    Query query = new Query();
                    query.setFilterById(enqueue);
                    Cursor c = dm.query(query);
                    if (c.moveToFirst()) {
                        int columnIndex = c
                                .getColumnIndex(DownloadManager.COLUMN_STATUS);
                        if (DownloadManager.STATUS_SUCCESSFUL == c
                                .getInt(columnIndex)) {

                            ImageView view = (ImageView) findViewById(R.id.imageView1);
                            String uriString = c
                                    .getString(c
                                            .getColumnIndex(DownloadManager.COLUMN_LOCAL_URI));

                             //start the installation of the latest version
                            Uri uri = Uri.parse(uriString); 
                            Intent promptInstall = new Intent(Intent.ACTION_VIEW);
                            promptInstall.setDataAndType(uri, "application/vnd.android.package-archive");
                            promptInstall.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                            mContext.startActivity(promptInstall);
                        }
                    }
                }
            }