我想以编程方式从 Android 下载 apk

Question

I want to download apk from Android programmatically. Apk file downloaded but I give There was a problem parsing the package message. I opening apk in download files, application is running. I want the apk file to be installed directly without getting the error.

public void Download(){

    Uri uri= Uri.parse(downloadUrl);

    DownloadManager downloadManager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
    DownloadManager.Request request = new DownloadManager.Request(uri);
    request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI |
            DownloadManager.Request.NETWORK_MOBILE);

    request.setTitle(title);
    request.setDescription(description);

    //request.allowScanningByMediaScanner();
    request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);

    //set the local destination for download file to a path within the application's external files directory
    request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS,apkName);
    //request.setMimeType("*/*");
    request.setMimeType("application/vnd.android.package-archive");
    downloadManager.enqueue(request);
}

Answer 1

Try this

Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(new File(Environment.getExternalStorageDirectory() + "/download/" + "app.apk")), "application/vnd.android.package-archive");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);