1 /* 2 * Copyright (C) 2023 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.accessibility; 18 19 import static com.android.settings.accessibility.FlashNotificationsUtil.ACTION_FLASH_NOTIFICATION_START_PREVIEW; 20 import static com.android.settings.accessibility.FlashNotificationsUtil.ACTION_FLASH_NOTIFICATION_STOP_PREVIEW; 21 import static com.android.settings.accessibility.FlashNotificationsUtil.DEFAULT_SCREEN_FLASH_COLOR; 22 import static com.android.settings.accessibility.FlashNotificationsUtil.EXTRA_FLASH_NOTIFICATION_PREVIEW_COLOR; 23 import static com.android.settings.accessibility.FlashNotificationsUtil.EXTRA_FLASH_NOTIFICATION_PREVIEW_TYPE; 24 import static com.android.settings.accessibility.FlashNotificationsUtil.TYPE_LONG_PREVIEW; 25 26 import android.app.Dialog; 27 import android.content.Intent; 28 import android.graphics.Color; 29 import android.os.Bundle; 30 import android.view.View; 31 32 import androidx.annotation.ColorInt; 33 import androidx.annotation.NonNull; 34 import androidx.annotation.Nullable; 35 import androidx.appcompat.app.AlertDialog; 36 import androidx.fragment.app.DialogFragment; 37 38 import com.android.settings.R; 39 40 import java.util.Timer; 41 import java.util.TimerTask; 42 import java.util.function.Consumer; 43 44 /** 45 * DialogFragment for Screen flash notification color picker. 46 */ 47 public class ScreenFlashNotificationColorDialogFragment extends DialogFragment implements 48 ColorSelectorLayout.OnCheckedChangeListener { 49 50 private static final int PREVIEW_LONG_TIME_MS = 5000; 51 private static final int BETWEEN_STOP_AND_START_DELAY_MS = 250; 52 private static final int MARGIN_FOR_STOP_DELAY_MS = 100; 53 54 @ColorInt 55 private int mCurrentColor = Color.TRANSPARENT; 56 private Consumer<Integer> mConsumer; 57 58 private Timer mTimer = null; 59 private Boolean mIsPreview = false; 60 getInstance(int initialColor, Consumer<Integer> colorConsumer)61 static ScreenFlashNotificationColorDialogFragment getInstance(int initialColor, 62 Consumer<Integer> colorConsumer) { 63 final ScreenFlashNotificationColorDialogFragment result = 64 new ScreenFlashNotificationColorDialogFragment(); 65 result.mCurrentColor = initialColor; 66 result.mConsumer = colorConsumer != null ? colorConsumer : i -> { 67 }; 68 return result; 69 } 70 71 @NonNull 72 @Override onCreateDialog(@ullable Bundle savedInstanceState)73 public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) { 74 final View dialogView = getLayoutInflater().inflate(R.layout.layout_color_selector_dialog, 75 null); 76 77 final ColorSelectorLayout colorSelectorLayout = dialogView.findViewById( 78 R.id.color_selector_preference); 79 if (colorSelectorLayout != null) { 80 colorSelectorLayout.setOnCheckedChangeListener(this); 81 colorSelectorLayout.setCheckedColor(mCurrentColor); 82 } 83 84 final AlertDialog createdDialog = new AlertDialog.Builder(getContext()) 85 .setView(dialogView) 86 .setTitle(R.string.screen_flash_notification_color_title) 87 .setNeutralButton(R.string.flash_notifications_preview, null) 88 .setNegativeButton(R.string.color_selector_dialog_cancel, (dialog, which) -> { 89 }) 90 .setPositiveButton(R.string.color_selector_dialog_done, (dialog, which) -> { 91 mCurrentColor = colorSelectorLayout.getCheckedColor(DEFAULT_SCREEN_FLASH_COLOR); 92 mConsumer.accept(mCurrentColor); 93 }) 94 .create(); 95 createdDialog.setOnShowListener( 96 dialogInterface -> createdDialog.getButton(AlertDialog.BUTTON_NEUTRAL) 97 .setOnClickListener(v -> showColor())); 98 99 return createdDialog; 100 } 101 102 @Override onPause()103 public void onPause() { 104 super.onPause(); 105 cancelPreviewTask(); 106 } 107 108 @Override onCheckedChanged(ColorSelectorLayout group)109 public void onCheckedChanged(ColorSelectorLayout group) { 110 mCurrentColor = group.getCheckedColor(DEFAULT_SCREEN_FLASH_COLOR); 111 if (mIsPreview) { 112 showColor(); 113 } 114 } 115 showColor()116 private void showColor() { 117 int startDelay = 0; 118 119 synchronized (this) { 120 if (mTimer != null) mTimer.cancel(); 121 122 mTimer = new Timer(); 123 if (mIsPreview) { 124 mTimer.schedule(getStopTask(), 0); 125 startDelay = BETWEEN_STOP_AND_START_DELAY_MS; 126 } 127 mTimer.schedule(getStartTask(), startDelay); 128 mTimer.schedule(getStopTask(), 129 startDelay + PREVIEW_LONG_TIME_MS + MARGIN_FOR_STOP_DELAY_MS); 130 } 131 } 132 getStartTask()133 private TimerTask getStartTask() { 134 return new TimerTask() { 135 @Override 136 public void run() { 137 synchronized (this) { 138 startPreviewLocked(); 139 } 140 } 141 }; 142 } 143 144 private TimerTask getStopTask() { 145 return new TimerTask() { 146 @Override 147 public void run() { 148 synchronized (this) { 149 stopPreviewLocked(); 150 } 151 } 152 }; 153 } 154 155 private void cancelPreviewTask() { 156 synchronized (this) { 157 if (mTimer != null) mTimer.cancel(); 158 stopPreviewLocked(); 159 } 160 } 161 162 private void startPreviewLocked() { 163 if (getContext() == null) return; 164 165 mIsPreview = true; 166 Intent intent = new Intent(ACTION_FLASH_NOTIFICATION_START_PREVIEW); 167 intent.putExtra(EXTRA_FLASH_NOTIFICATION_PREVIEW_TYPE, TYPE_LONG_PREVIEW); 168 intent.putExtra(EXTRA_FLASH_NOTIFICATION_PREVIEW_COLOR, mCurrentColor); 169 getContext().sendBroadcast(intent); 170 } 171 172 private void stopPreviewLocked() { 173 if (getContext() == null) return; 174 175 Intent stopIntent = new Intent(ACTION_FLASH_NOTIFICATION_STOP_PREVIEW); 176 getContext().sendBroadcast(stopIntent); 177 mIsPreview = false; 178 } 179 } 180