Question

我的webView应用程序在用户点击文件上传时正在请求权限

        @Override
        public boolean onShowFileChooser(WebView view, ValueCallback < Uri[] > valueCallback, WebChromeClient.FileChooserParams fileChooserParams) {
            Context context = getApplicationContext();

            Log.d("LOG", "Triggered 1");

            if (fileChooserCallback != null) {
                fileChooserCallback.onReceiveValue(null);
            }

            fileChooserCallback = valueCallback;

            String[] permissions = new String[] {
                android.Manifest.permission.CAMERA,
                    android.Manifest.permission.WRITE_EXTERNAL_STORAGE,
                    android.Manifest.permission.READ_EXTERNAL_STORAGE
            };

            Log.d("LOG", "Triggered 2");

            if (!hasPermissions(context, permissions)) {
                ActivityCompat.requestPermissions(MainActivity.this, permissions, PERMISSION_CAMERA_WITH_STORAGE);
            } else {
                startPictureSelectionActivity();
            }

            return true;
        }


        private boolean hasPermissions(Context context, String...permissions) {
            for (String permission: permissions) {
                if (ActivityCompat.checkSelfPermission(context, permission) != PackageManager.PERMISSION_GRANTED) {
                    return false;
                }
            }

            return true;
        }


        @Override
        public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[], @NonNull int[] grantResults) {
            if (requestCode == PERMISSION_CAMERA_WITH_STORAGE) {
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    startPictureSelectionActivity();
                }
            } else if (requestCode == PERMISSION_FINE_LOCATION) {
                if (grantResults.length == 1 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    locationCallback.invoke(locationOrigin, true, true);

                }
            } else {
                super.onRequestPermissionsResult(requestCode, permissions, grantResults);
            }
        }

如果用户同意授予请求的权限，则上传工作正常，但如果他不同意，则应用程序对上传点击不再反应（只是什么也没有发生，日志为空），直到用户重新启动应用程序为止。有什么问题吗？

我需要第二个点击应用上的内容才能再次请求权限，因此直到用户同意所请求的权限。例如，如果用户拒绝了所有权限，则Google Chrome和Mozilla Firefox都会打开最近的文件，并且在下次尝试上传文件时再次询问权限。

Answer 1

覆盖onRequestPermissionsResult()，检查是否已授予许可，然后在其中调用startPictureSelectionActivity();。

documentation

中的更多详细信息

Answer 2

添加了拒绝权限的意图，现在可以正常工作，与Mozilla Firefox的工作相同。

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[], @NonNull int[] grantResults) {
    if (requestCode == PERMISSION_CAMERA_WITH_STORAGE) {
        if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            startPictureSelectionActivity();
        } else {
            Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
            intent.setType("image/*");
            startActivityForResult(intent, FILECHOOSER_RESULT_CODE);
        }
    } else if (requestCode == PERMISSION_FINE_LOCATION) {
        if (grantResults.length == 1 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            locationCallback.invoke(locationOrigin, true, true);
        }
    } else {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    }
}

如果未授予权限，则不会触发onShowFileChooser

2 个答案: