我有一个 WebView，加载的某些页面需要 GeolocationPermissions 的权限。为此，我覆盖了 onGeolocationPermissionsShowPrompt()。好的。

此外，我的应用程序以新权限模型的 SDK 23 (Android M) 为目标。因此，我需要检查用户是否授予了 ACCESS_FINE_LOCATION 权限，如果没有，则显示一个询问权限的对话框。

如何只为需要 GeolocationPermissions 的页面显示该对话框？

回调 onPermissionRequest(PermissionRequest request) 没有被调用。

安卓 list :

WebView 回调

@Override
public void onGeolocationPermissionsShowPrompt(String origin, GeolocationPermissions.Callback callback) {
    callback.invoke(origin, true, true);
    super.onGeolocationPermissionsShowPrompt(origin, callback);
}

@Override
public void onPermissionRequest(PermissionRequest request) {
    if (ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION)!= PackageManager.PERMISSION_GRANTED){
        requestLocationPermission();
    else {
        super.onPermissionRequest(request);
    }

显示对话框权限

private void requestLocationPermission() {
    if (ActivityCompat.shouldShowRequestPermissionRationale(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION)) {
      new ADPDialogFragment(getActivity()) {
        @Override
        public String getTitre() {
            return getString(R.string.mob_he_configuration_dialogue_message_titre);
        }

        @Override
        public String getMessage() {
            return getString(R.string.permission_location_rationale);
        }

        @Override
        public void doPositiveClick() {
            ActivityCompat.requestPermissions(getActivity(), new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, REQUEST_LOCATION);
        }
    }.show(getFragmentManager(), TAG);
} else {
    ActivityCompat.requestPermissions(getActivity(), new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, REQUEST_LOCATION);
}

权限回调

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {

    if (requestCode == REQUEST_LOCATION) {
        // BEGIN_INCLUDE(permission_result)
        // Received permission result for camera permission.
        Log.i(TAG, "Received response for Camera permission request.");

        // Check if the only required permission has been granted
        if (grantResults.length == 1 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            // Camera permission has been granted, preview can be displayed

        } else {
            Toast.makeText(getActivity(), getString(R.string.permissions_not_granted), Toast.LENGTH_SHORT).show();

        }
        // END_INCLUDE(permission_result)

    } else {

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

感谢您的帮助!

最佳答案

您可以在调用 onGeolocationPermissionsShowPrompt 时请求用户的许可:

@Override
public void onGeolocationPermissionsShowPrompt(String origin, GeolocationPermissions.Callback callback) {
    if (ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION)!= PackageManager.PERMISSION_GRANTED) {
        mCallback = callback;
        mOrigin   = origin;
        requestLocationPermission();
    } else {
        callback.invoke(origin, true, true);
    }
}

以及当用户选择是否授予您权限时:

@Override
public void onRequestPermissionsResult(int requestCode,
                                       @NonNull String[] permissions,
                                       @NonNull int[] grantResults)
{
    switch (requestCode) {
    case REQUEST_LOCATION:
        if (mCallback != null && mOrigin != null)
            mCallback.invoke(mOrigin,
                             grantResults.length == 1 && grantResults[0] == PackageManager.PERMISSION_GRANTED,
                             false);
        mCallback = null;
        mOrigin   = null;
        break;

    default:
        super.onRequestPermissionsResult(requestCode, permissions,
                                         grantResults);
    }
}

关于安卓 M : System permission vs WebView location permission，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32659725/