android代码实现深色模式切换（在设置-显示中增加）

效果图：

1.vendor/mediatek/proprietary/packages/apps/MtkSettings/res/values/strings.xml

<string name="read_model_title">Read model</string>

2.vendor/mediatek/proprietary/packages/apps/MtkSettings/res/xml/display_settings.xml

<SwitchPreference android:key="read_model" android:title="@string/read_model_title"/>

3.vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/DisplaySettings.java

import com.android.settings.display.ShowOperatorNamePreferenceController; import com.android.settings.display.ReadModelPreferenceController; import com.android.settings.display.TapToWakePreferenceController; @@ -98,6 99,7 @@ public class DisplaySettings extends DashboardFragment { controllers.add(new ShowOperatorNamePreferenceController(context)); controllers.add(new ReadModelPreferenceController(context));

4.添加vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/display/ReadModelPreferenceController.java

/* * Copyright (C) 2017 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.android.settings.display; import android.content.Context; import android.provider.Settings; import android.support.v14.preference.SwitchPreference; import android.support.v7.preference.Preference; import com.android.settings.R; import com.android.settings.core.PreferenceControllerMixin; import com.android.settingslib.core.AbstractPreferenceController; public class ReadModelPreferenceController extends AbstractPreferenceController implements PreferenceControllerMixin, Preference.OnPreferenceChangeListener { private static final String KEY_READ_MODEL_NAME = "read_model"; public ReadModelPreferenceController(Context context) { super(context); } @Override public boolean isAvailable() { return true; } @Override public String getPreferenceKey() { return KEY_READ_MODEL_NAME; } @Override public boolean onPreferenceChange(Preference preference, Object newValue) { boolean value = (Boolean) newValue; Settings.Secure.putInt(mContext.getContentResolver(), KEY_READ_MODEL_NAME, value ? 0 : 1); if (!value) { Settings.Secure.putInt(mContext.getContentResolver(), Settings.Secure.ACCESSIBILITY_DISPLAY_DALTONIZER_ENABLED, 0); } else { Settings.Secure.putInt(mContext.getContentResolver(), Settings.Secure.ACCESSIBILITY_DISPLAY_DALTONIZER_ENABLED, 1); Settings.Secure.putInt(mContext.getContentResolver(), Settings.Secure.ACCESSIBILITY_DISPLAY_DALTONIZER, 0); } return true; } @Override public void updateState(Preference preference) { int value = Settings.Secure.getInt(mContext.getContentResolver(), KEY_READ_MODEL_NAME, 1); ((SwitchPreference) preference).setChecked(value != 1); } }

参考源码

vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/development/SimulateColorSpacePreferenceController.java 参考google code: 打开开关调用writeSimulateColorSpace(0); 关闭开关调用writeSimulateColorSpace(-1); 96 private void writeSimulateColorSpace(Object value) { 97 final ContentResolver cr = mContext.getContentResolver(); 98 final int newMode = Integer.parseInt(value.toString()); 99 if (newMode < 0) { 100 Settings.Secure.putInt(cr, Settings.Secure.ACCESSIBILITY_DISPLAY_DALTONIZER_ENABLED, 101 SETTING_VALUE_OFF); 102 } else { 103 Settings.Secure.putInt(cr, Settings.Secure.ACCESSIBILITY_DISPLAY_DALTONIZER_ENABLED, 104 SETTING_VALUE_ON); 105 Settings.Secure.putInt(cr, Settings.Secure.ACCESSIBILITY_DISPLAY_DALTONIZER, newMode); 106 } 107 }