install apk programmatically in android 8 (API 26)

Question

I wrote a method to install apk in all version of android and it works until android 8 . but it seems android 8 do not response to this method

install_apk(File file) {         try {             if (file.exists()) {                 String[] fileNameArray = file.getName().split(Pattern.quote("."));                 if (fileNameArray[fileNameArray.length - 1].equals("apk")) {                     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {                         Uri downloaded_apk = getFileUri(context, file);                         Intent intent = new Intent(Intent.ACTION_VIEW).setDataAndType(downloaded_apk,                                 "application/vnd.android.package-archive");                         intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);                         context.startActivity(intent);                     } else {                         Intent intent = new Intent(Intent.ACTION_VIEW);                         intent.setDataAndType(Uri.fromFile(file),                                 "application/vnd.android.package-archive");                         intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);                         context.startActivity(intent);                     }                 }             }         } catch (Exception e) {             e.printStackTrace();         }     } 

and this method for get uri on api >= 23

Uri getFileUri(Context context, File file) {         return FileProvider.getUriForFile(context,                 context.getApplicationContext().getPackageName() + ".HelperClasses.GenericFileProvider"                 , file);     } 

Answer 1

You should be add a new permission.

<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES"/>