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.content.res.Configuration; 25 import android.os.PowerManager; 26 import android.provider.Settings; 27 28 import androidx.annotation.VisibleForTesting; 29 import androidx.fragment.app.Fragment; 30 import androidx.preference.Preference; 31 import androidx.preference.PreferenceScreen; 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 Preference 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 (mContext.getResources().getConfiguration().uiMode 72 & Configuration.UI_MODE_NIGHT_YES) != 0; 73 } 74 75 @Override displayPreference(PreferenceScreen screen)76 public void displayPreference(PreferenceScreen screen) { 77 super.displayPreference(screen); 78 mPreference = screen.findPreference(getPreferenceKey()); 79 } 80 81 @Override updateState(Preference preference)82 public void updateState(Preference preference) { 83 super.updateState(preference); 84 updateEnabledStateIfNeeded(); 85 } 86 87 @Override setChecked(boolean isChecked)88 public boolean setChecked(boolean isChecked) { 89 final boolean dialogSeen = 90 Settings.Secure.getInt(mContext.getContentResolver(), 91 Settings.Secure.DARK_MODE_DIALOG_SEEN, 0) == DIALOG_SEEN; 92 if (!dialogSeen && isChecked) { 93 showDarkModeDialog(); 94 } 95 return mUiModeManager.setNightModeActivated(isChecked); 96 } 97 showDarkModeDialog()98 private void showDarkModeDialog() { 99 final DarkUIInfoDialogFragment frag = new DarkUIInfoDialogFragment(); 100 if (mFragment != null && mFragment.getFragmentManager() != null) { 101 frag.show(mFragment.getFragmentManager(), getClass().getName()); 102 } 103 } 104 105 @VisibleForTesting updateEnabledStateIfNeeded()106 void updateEnabledStateIfNeeded() { 107 if (mPreference == null) { 108 return; 109 } 110 boolean isBatterySaver = isPowerSaveMode(); 111 mPreference.setEnabled(!isBatterySaver); 112 if (isBatterySaver) { 113 int stringId = isChecked() 114 ? R.string.dark_ui_mode_disabled_summary_dark_theme_on 115 : R.string.dark_ui_mode_disabled_summary_dark_theme_off; 116 mPreference.setSummary(mContext.getString(stringId)); 117 } 118 } 119 120 @VisibleForTesting isPowerSaveMode()121 boolean isPowerSaveMode() { 122 return mPowerManager.isPowerSaveMode(); 123 } 124 125 @Override onStart()126 public void onStart() { 127 mContext.registerReceiver(mReceiver, 128 new IntentFilter(PowerManager.ACTION_POWER_SAVE_MODE_CHANGED)); 129 } 130 131 // used by AccessibilitySettings setParentFragment(Fragment fragment)132 public void setParentFragment(Fragment fragment) { 133 mFragment = fragment; 134 } 135 136 @Override onStop()137 public void onStop() { 138 mContext.unregisterReceiver(mReceiver); 139 } 140 141 @Override getAvailabilityStatus()142 public int getAvailabilityStatus() { 143 return AVAILABLE; 144 } 145 } 146