| /* |
| * Copyright 2020 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 android.annotation.SuppressLint; |
| import android.app.Activity; |
| import android.os.Bundle; |
| import android.util.Base64; |
| import android.view.View; |
| import android.webkit.WebView; |
| import android.widget.AdapterView; |
| import android.widget.Spinner; |
| import android.widget.Switch; |
| |
| import androidx.annotation.Nullable; |
| import androidx.appcompat.app.AppCompatActivity; |
| import androidx.webkit.WebSettingsCompat; |
| import androidx.webkit.WebViewFeature; |
| |
| /** |
| * An {@link Activity} to exercise Force Dark Strategy functionality. |
| * It loads two web-pages in WebViews, one of which supports dark-theme while another does not |
| * and shows them side by side. |
| * Activity allows setting WebViews to use UA darkening, Web theme darkening (media query vs |
| * meta-tag) or both. |
| */ |
| @SuppressLint("RestrictedApi") |
| public class ForceDarkStrategyActivity extends AppCompatActivity { |
| private final String mNoDarkThemeSupport = Base64.encodeToString(( |
| "<html>" |
| + " <head><style>" |
| + " table, th, td {" |
| + " border: 2px solid black;" |
| + " border-collapse: collapse;" |
| + " margin-top: 10px;" |
| + " }" |
| + " </style></head>" |
| + " <body>" |
| + " <h2> No support for dark theme </h2>" |
| + " <table>" |
| + " <tr>" |
| + " <th>UA only</th>" |
| + " <th>Web theme only</th>" |
| + " <th>Prefer web theme</th>" |
| + " </tr>" |
| + " <tr>" |
| + " <td>Black</td>" |
| + " <td>White</td>" |
| + " <td>Black</td>" |
| + " </tr>" |
| + " </table>" |
| + " </body>" |
| + "</html>" |
| ).getBytes(), Base64.NO_PADDING); |
| |
| private final String mDarkThemeSupport = Base64.encodeToString(( |
| "<html>" |
| + " <head>" |
| + " <meta name=\"color-scheme\" content=\"dark light\">" |
| + " <style>" |
| + " table, th, td {" |
| + " border: 2px solid black;" |
| + " border-collapse: collapse;" |
| + " margin-top: 10px;" |
| + " }" |
| + " @media (prefers-color-scheme: dark) {" |
| + " body {background-color: green;} " |
| + " }" |
| + " </style>" |
| + " </head>" |
| + " <body>" |
| + " <h2>Support dark theme: </h2>" |
| + " @media (prefers-color-scheme: dark) { <br>" |
| + " body {background-color: green;} <br> " |
| + " }" |
| + " <table>" |
| + " <tr>" |
| + " <th>UA only</th>" |
| + " <th>Web theme only</th>" |
| + " <th>Prefer web theme</th>" |
| + " </tr>" |
| + " <tr>" |
| + " <td>Black</td>" |
| + " <td>Green</td>" |
| + " <td>Green</td>" |
| + " </tr>" |
| + " </table>" |
| + " </body>" |
| + "</html>" |
| ).getBytes(), Base64.NO_PADDING); |
| |
| @Override |
| protected void onCreate(@Nullable Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| |
| setContentView(R.layout.activity_force_dark_strategy); |
| setTitle(R.string.force_dark_strategy_activity_title); |
| WebkitHelpers.appendWebViewVersionToTitle(this); |
| |
| if (!WebViewFeature.isFeatureSupported(WebViewFeature.FORCE_DARK_STRATEGY)) { |
| WebkitHelpers.showMessageInActivity(ForceDarkStrategyActivity.this, |
| R.string.webkit_api_not_available); |
| return; |
| } |
| |
| final WebView darkThemeWebView = findViewById(R.id.webview_dark_theme); |
| final WebView noDarkThemeWebView = findViewById(R.id.webview_no_dark_theme); |
| final Spinner darkStrategySpinner = findViewById(R.id.spinner_force_dark_strategy); |
| Switch forceDarkSwitch = findViewById(R.id.switch_force_dark_strategy); |
| |
| darkThemeWebView.loadData(mDarkThemeSupport, |
| "text/html", "base64"); |
| |
| noDarkThemeWebView.loadData(mNoDarkThemeSupport, |
| "text/html", "base64"); |
| |
| forceDarkSwitch.setOnCheckedChangeListener((buttonView, isChecked) -> { |
| int forceDark = |
| isChecked ? WebSettingsCompat.FORCE_DARK_ON : WebSettingsCompat.FORCE_DARK_OFF; |
| |
| WebSettingsCompat.setForceDark(darkThemeWebView.getSettings(), forceDark); |
| WebSettingsCompat.setForceDark(noDarkThemeWebView.getSettings(), forceDark); |
| }); |
| darkStrategySpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { |
| @Override |
| public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { |
| int forceDarkStrategy = |
| WebSettingsCompat.DARK_STRATEGY_PREFER_WEB_THEME_OVER_USER_AGENT_DARKENING; |
| switch (darkStrategySpinner.getSelectedItemPosition()) { |
| case 0: |
| forceDarkStrategy = |
| WebSettingsCompat.DARK_STRATEGY_USER_AGENT_DARKENING_ONLY; |
| break; |
| case 1: |
| forceDarkStrategy = |
| WebSettingsCompat.DARK_STRATEGY_WEB_THEME_DARKENING_ONLY; |
| break; |
| } |
| WebSettingsCompat.setForceDarkStrategy(darkThemeWebView.getSettings(), |
| forceDarkStrategy); |
| WebSettingsCompat.setForceDarkStrategy(darkThemeWebView.getSettings(), |
| forceDarkStrategy); |
| } |
| |
| @Override |
| public void onNothingSelected(AdapterView<?> parent) { |
| } |
| }); |
| } |
| |
| } |
