1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License 15 */ 16 17 package com.android.settings.display; 18 19 import android.app.UiModeManager; 20 import android.content.BroadcastReceiver; 21 import android.content.Context; 22 import android.content.Intent; 23 import android.content.IntentFilter; 24 import android.os.PowerManager; 25 import android.provider.Settings; 26 27 import androidx.annotation.VisibleForTesting; 28 import androidx.fragment.app.Fragment; 29 import androidx.preference.Preference; 30 import androidx.preference.PreferenceScreen; 31 import androidx.preference.SwitchPreference; 32 33 import com.android.settings.R; 34 import com.android.settings.core.TogglePreferenceController; 35 import com.android.settingslib.core.lifecycle.LifecycleObserver; 36 import com.android.settingslib.core.lifecycle.events.OnStart; 37 import com.android.settingslib.core.lifecycle.events.OnStop; 38 39 public class DarkUIPreferenceController extends TogglePreferenceController implements 40 LifecycleObserver, OnStart, OnStop { 41 42 public static final String DARK_MODE_PREFS = "dark_mode_prefs"; 43 public static final String PREF_DARK_MODE_DIALOG_SEEN = "dark_mode_dialog_seen"; 44 public static final int DIALOG_SEEN = 1; 45 46 @VisibleForTesting 47 SwitchPreference mPreference; 48 49 private UiModeManager mUiModeManager; 50 private PowerManager mPowerManager; 51 private Context mContext; 52 53 private Fragment mFragment; 54 55 private BroadcastReceiver mReceiver = new BroadcastReceiver() { 56 @Override 57 public void onReceive(Context context, Intent intent) { 58 updateEnabledStateIfNeeded(); 59 } 60 }; 61 DarkUIPreferenceController(Context context, String key)62 public DarkUIPreferenceController(Context context, String key) { 63 super(context, key); 64 mContext = context; 65 mUiModeManager = context.getSystemService(UiModeManager.class); 66 mPowerManager = context.getSystemService(PowerManager.class); 67 } 68 69 @Override isChecked()70 public boolean isChecked() { 71 return mUiModeManager.getNightMode() == UiModeManager.MODE_NIGHT_YES; 72 } 73 74 @Override displayPreference(PreferenceScreen screen)75 public void displayPreference(PreferenceScreen screen) { 76 super.displayPreference(screen); 77 mPreference = screen.findPreference(getPreferenceKey()); 78 } 79 80 @Override updateState(Preference preference)81 public void updateState(Preference preference) { 82 super.updateState(preference); 83 updateEnabledStateIfNeeded(); 84 } 85 86 @Override setChecked(boolean isChecked)87 public boolean setChecked(boolean isChecked) { 88 final boolean dialogSeen = 89 Settings.Secure.getInt(mContext.getContentResolver(), 90 Settings.Secure.DARK_MODE_DIALOG_SEEN, 0) == DIALOG_SEEN; 91 if (!dialogSeen && isChecked) { 92 showDarkModeDialog(); 93 return false; 94 } 95 mUiModeManager.setNightMode(isChecked 96 ? UiModeManager.MODE_NIGHT_YES 97 : UiModeManager.MODE_NIGHT_NO); 98 return true; 99 } 100 showDarkModeDialog()101 private void showDarkModeDialog() { 102 final DarkUIInfoDialogFragment frag = new DarkUIInfoDialogFragment(); 103 if (mFragment.getFragmentManager() != null) { 104 frag.show(mFragment.getFragmentManager(), getClass().getName()); 105 } 106 } 107 108 @VisibleForTesting updateEnabledStateIfNeeded()109 void updateEnabledStateIfNeeded() { 110 if (mPreference == null) { 111 return; 112 } 113 boolean isBatterySaver = isPowerSaveMode(); 114 mPreference.setEnabled(!isBatterySaver); 115 if (isBatterySaver) { 116 int stringId = mUiModeManager.getNightMode() == UiModeManager.MODE_NIGHT_YES 117 ? R.string.dark_ui_mode_disabled_summary_dark_theme_on 118 : R.string.dark_ui_mode_disabled_summary_dark_theme_off; 119 mPreference.setSummary(mContext.getString(stringId)); 120 } else { 121 mPreference.setSummary(null); 122 } 123 } 124 125 @VisibleForTesting isPowerSaveMode()126 boolean isPowerSaveMode() { 127 return mPowerManager.isPowerSaveMode(); 128 } 129 130 131 @VisibleForTesting setUiModeManager(UiModeManager uiModeManager)132 void setUiModeManager(UiModeManager uiModeManager) { 133 mUiModeManager = uiModeManager; 134 } 135 setParentFragment(Fragment fragment)136 public void setParentFragment(Fragment fragment) { 137 mFragment = fragment; 138 } 139 140 @Override onStart()141 public void onStart() { 142 mContext.registerReceiver(mReceiver, 143 new IntentFilter(PowerManager.ACTION_POWER_SAVE_MODE_CHANGED)); 144 } 145 146 @Override onStop()147 public void onStop() { 148 mContext.unregisterReceiver(mReceiver); 149 } 150 151 @Override getAvailabilityStatus()152 public int getAvailabilityStatus() { 153 return AVAILABLE; 154 } 155 } 156