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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.android.permissionrequest;
import android.Manifest;
import android.annotation.SuppressLint;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.Fragment;
import android.support.v4.content.ContextCompat;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.ConsoleMessage;
import android.webkit.PermissionRequest;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import com.example.android.common.logger.Log;
/**
* This fragment shows a {@link WebView} and loads a web app from the {@link SimpleWebServer}.
*/
public class PermissionRequestFragment extends Fragment
implements ConfirmationDialogFragment.Listener, MessageDialogFragment.Listener {
private static final String TAG = PermissionRequestFragment.class.getSimpleName();
private static final String FRAGMENT_DIALOG = "dialog";
private static final int REQUEST_CAMERA_PERMISSION = 1;
/**
* We use this web server to serve HTML files in the assets folder. This is because we cannot
* use the JavaScript method "getUserMedia" from "file:///android_assets/..." URLs.
*/
private SimpleWebServer mWebServer;
/**
* A reference to the {@link WebView}.
*/
private WebView mWebView;
/**
* This field stores the {@link PermissionRequest} from the web application until it is allowed
* or denied by user.
*/
private PermissionRequest mPermissionRequest;
/**
* For testing.
*/
private ConsoleMonitor mConsoleMonitor;
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
@Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_permission_request, container, false);
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
mWebView = (WebView) view.findViewById(R.id.web_view);
// Here, we use #mWebChromeClient with implementation for handling PermissionRequests.
mWebView.setWebChromeClient(mWebChromeClient);
configureWebSettings(mWebView.getSettings());
}
@Override
public void onResume() {
super.onResume();
final int port = 8080;
mWebServer = new SimpleWebServer(port, getResources().getAssets());
mWebServer.start();
// This is for runtime permission on Marshmallow and above; It is not directly related to
// PermissionRequest API.
if (ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.CAMERA)
!= PackageManager.PERMISSION_GRANTED) {
requestCameraPermission();
} else {
mWebView.loadUrl("http://localhost:" + port + "/sample.html");
}
}
@Override
public void onPause() {
mWebServer.stop();
super.onPause();
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
@NonNull int[] grantResults) {
// This is for runtime permission on Marshmallow and above; It is not directly related to
// PermissionRequest API.
if (requestCode == REQUEST_CAMERA_PERMISSION) {
if (permissions.length != 1 || grantResults.length != 1 ||
grantResults[0] != PackageManager.PERMISSION_GRANTED) {
Log.e(TAG, "Camera permission not granted.");
} else if (mWebView != null && mWebServer != null) {
mWebView.loadUrl("http://localhost:" + mWebServer.getPort() + "/sample.html");
}
} else {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
private void requestCameraPermission() {
if (shouldShowRequestPermissionRationale(Manifest.permission.CAMERA)) {
MessageDialogFragment.newInstance(R.string.permission_message)
.show(getChildFragmentManager(), FRAGMENT_DIALOG);
} else {
requestPermissions(new String[]{Manifest.permission.CAMERA}, REQUEST_CAMERA_PERMISSION);
}
}
@SuppressLint("SetJavaScriptEnabled")
private static void configureWebSettings(WebSettings settings) {
settings.setJavaScriptEnabled(true);
}
/**
* This {@link WebChromeClient} has implementation for handling {@link PermissionRequest}.
*/
private WebChromeClient mWebChromeClient = new WebChromeClient() {
// This method is called when the web content is requesting permission to access some
// resources.
@Override
public void onPermissionRequest(PermissionRequest request) {
Log.i(TAG, "onPermissionRequest");
mPermissionRequest = request;
final String[] requestedResources = request.getResources();
for (String r : requestedResources) {
if (r.equals(PermissionRequest.RESOURCE_VIDEO_CAPTURE)) {
// In this sample, we only accept video capture request.
ConfirmationDialogFragment
.newInstance(new String[]{PermissionRequest.RESOURCE_VIDEO_CAPTURE})
.show(getChildFragmentManager(), FRAGMENT_DIALOG);
break;
}
}
}
// This method is called when the permission request is canceled by the web content.
@Override
public void onPermissionRequestCanceled(PermissionRequest request) {
Log.i(TAG, "onPermissionRequestCanceled");
// We dismiss the prompt UI here as the request is no longer valid.
mPermissionRequest = null;
DialogFragment fragment = (DialogFragment) getChildFragmentManager()
.findFragmentByTag(FRAGMENT_DIALOG);
if (null != fragment) {
fragment.dismiss();
}
}
@Override
public boolean onConsoleMessage(@NonNull ConsoleMessage message) {
switch (message.messageLevel()) {
case TIP:
Log.v(TAG, message.message());
break;
case LOG:
Log.i(TAG, message.message());
break;
case WARNING:
Log.w(TAG, message.message());
break;
case ERROR:
Log.e(TAG, message.message());
break;
case DEBUG:
Log.d(TAG, message.message());
break;
}
if (null != mConsoleMonitor) {
mConsoleMonitor.onConsoleMessage(message);
}
return true;
}
};
@Override
public void onOkClicked() {
requestPermissions(new String[]{Manifest.permission.CAMERA}, REQUEST_CAMERA_PERMISSION);
}
@Override
public void onConfirmation(boolean allowed, String[] resources) {
if (allowed) {
mPermissionRequest.grant(resources);
Log.d(TAG, "Permission granted.");
} else {
mPermissionRequest.deny();
Log.d(TAG, "Permission request denied.");
}
mPermissionRequest = null;
}
public void setConsoleMonitor(ConsoleMonitor monitor) {
mConsoleMonitor = monitor;
}
/**
* For testing.
*/
public interface ConsoleMonitor {
void onConsoleMessage(ConsoleMessage message);
}
}
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