| /* |
| * Copyright 2019 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.androidx.webkit; |
| |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| |
| import android.app.Activity; |
| import android.os.Bundle; |
| import android.util.Base64; |
| import android.webkit.WebView; |
| import android.webkit.WebViewClient; |
| |
| import androidx.annotation.Nullable; |
| import androidx.appcompat.app.AppCompatActivity; |
| import androidx.webkit.WebSettingsCompat; |
| import androidx.webkit.WebViewFeature; |
| |
| /** |
| * An {@link Activity} to exercise Force Dark functionality. |
| * It shows WebViews side by side with different dark mode settings. |
| */ |
| public class ForceDarkActivity extends AppCompatActivity { |
| private static final String DESCRIPTION = |
| "<html><body><h1>Force Dark Mode is %s </h1></body></html>"; |
| |
| @Override |
| protected void onCreate(@Nullable Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| |
| setContentView(R.layout.activity_force_dark); |
| setTitle(R.string.force_dark_activity_title); |
| WebkitHelpers.appendWebViewVersionToTitle(this); |
| |
| if (WebViewFeature.isFeatureSupported(WebViewFeature.FORCE_DARK)) { |
| setupWebView(findViewById(R.id.webview_force_dark_on), WebSettingsCompat.FORCE_DARK_ON); |
| setupWebView(findViewById(R.id.webview_force_dark_off), |
| WebSettingsCompat.FORCE_DARK_OFF); |
| setupWebView(findViewById(R.id.webview_force_dark_auto), |
| WebSettingsCompat.FORCE_DARK_AUTO); |
| } else { |
| WebkitHelpers.showMessageInActivity(ForceDarkActivity.this, |
| R.string.webkit_api_not_available); |
| } |
| } |
| |
| private void setupWebView(WebView webView, int forceDarkMode) { |
| webView.setWebViewClient(new WebViewClient()); |
| String formattedDescription; |
| switch (forceDarkMode) { |
| case WebSettingsCompat.FORCE_DARK_ON: |
| formattedDescription = Base64.encodeToString( |
| String.format(DESCRIPTION, "ON").getBytes(UTF_8), Base64.NO_PADDING); |
| break; |
| case WebSettingsCompat.FORCE_DARK_OFF: |
| formattedDescription = Base64.encodeToString( |
| String.format(DESCRIPTION, "OFF").getBytes(UTF_8), Base64.NO_PADDING); |
| break; |
| case WebSettingsCompat.FORCE_DARK_AUTO: |
| formattedDescription = Base64.encodeToString( |
| String.format(DESCRIPTION, "AUTO").getBytes(UTF_8), Base64.NO_PADDING); |
| break; |
| default: |
| throw new UnsupportedOperationException("Unknown force dark mode"); |
| } |
| webView.loadData(formattedDescription, null, "base64"); |
| WebSettingsCompat.setForceDark(webView.getSettings(), forceDarkMode); |
| } |
| } |
