在某些设备上的 onRequestPermissionsResult grantResults return 当用户拒绝权限时为空

Question

In Shot:，In onRequestPermissionsResult 某些设备上的 grantResults return 为空，而某些设备在用户拒绝时具有值 PackageManager.PERMISSION_DENIED许可。

我已经实施了一个解决方案，用于识别用户已选择接受、拒绝和 拒绝不询问再次 获得运行时间许可，基于回答。

根据我看过的许多文档，如果用户拒绝许可，那么它 returns grantResults 为空

我使用的代码 else if (grantResults[0] == PackageManager.PERMISSION_DENIED) 所以在 else if 部分它抛出 Arrayindexoutofbound 异常

i have tested code when user decline permission grantResults is not emplty for my case,but i have seen crash report on fabric console for grantResults there is many crash with arrayindexoutofbound,

 @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        switch (requestCode) {
            case PermissionManager.MY_PERMISSIONS_REQUEST_LOCATION_ACCESS: {
                // If request is cancelled, the result arrays are empty.
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    DefineLocationService.start(this);
                    startNextActivity(0);
                } else if (grantResults[0] == PackageManager.PERMISSION_DENIED) {
                    boolean showRationale = ActivityCompat.shouldShowRequestPermissionRationale(this, permissions[0]);
                    if (!showRationale) {
                        // user also CHECKED "never ask again"
                        // you can either enable some fall back,
                        // disable features of your app
                        // or open another dialog explaining
                        // again the permission and directing to
                        // the app setting
                        startNextActivity(ARTIFICIAL_DELAY_MILLIS);
                    } else if (!PermissionManager.MY_REQUESTED_DIALOG) {
                        PermissionManager.checkLocationPermission(this);
                    } else {
                        startNextActivity(0);
                    }
                } else {
                    startNextActivity(ARTIFICIAL_DELAY_MILLIS);
                }


            }
        }
    }

谁能对此有任何解释，为什么有些设备 return grantResults 是空的，而有些设备 return grantResults 在用户拒绝许可。

我已经测试了很多次但是grantResults我这边从来没有空过，但是控制台崩溃了，这意味着在某些情况下它是空的并且grantResults[0]抛出异常。

Answer 1

根据the documentation：

Note: It is possible that the permissions request interaction with the user is interrupted. In this case you will receive empty permissions and results arrays which should be treated as a cancellation.

你想如何处理取消完全取决于你（重新请求许可，将其视为拒绝等），所以请确保在你的代码中考虑到这种情况。

在某些设备上的 onRequestPermissionsResult grantResults return 当用户拒绝权限时为空

In onRequestPermissionsResult grantResults on some device return empty when user decline the permission

android

permission-denied

android-permissions

runtime-permissions