1 /* 2 * Copyright (C) 2017 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.development; 18 19 import android.app.ActivityManager; 20 import android.app.IActivityManager; 21 import android.content.Context; 22 import android.os.RemoteException; 23 import android.provider.Settings; 24 25 import androidx.annotation.VisibleForTesting; 26 import androidx.preference.Preference; 27 import androidx.preference.PreferenceScreen; 28 import androidx.preference.SwitchPreference; 29 30 import com.android.settings.core.PreferenceControllerMixin; 31 import com.android.settingslib.development.DeveloperOptionsPreferenceController; 32 33 public class KeepActivitiesPreferenceController extends DeveloperOptionsPreferenceController 34 implements Preference.OnPreferenceChangeListener, PreferenceControllerMixin { 35 36 private static final String IMMEDIATELY_DESTROY_ACTIVITIES_KEY = 37 "immediately_destroy_activities"; 38 39 @VisibleForTesting 40 static final int SETTING_VALUE_OFF = 0; 41 42 private IActivityManager mActivityManager; 43 KeepActivitiesPreferenceController(Context context)44 public KeepActivitiesPreferenceController(Context context) { 45 super(context); 46 } 47 48 @Override getPreferenceKey()49 public String getPreferenceKey() { 50 return IMMEDIATELY_DESTROY_ACTIVITIES_KEY; 51 } 52 53 @Override displayPreference(PreferenceScreen screen)54 public void displayPreference(PreferenceScreen screen) { 55 super.displayPreference(screen); 56 57 mActivityManager = getActivityManager(); 58 } 59 60 @Override onPreferenceChange(Preference preference, Object newValue)61 public boolean onPreferenceChange(Preference preference, Object newValue) { 62 final boolean isEnabled = (Boolean) newValue; 63 writeImmediatelyDestroyActivitiesOptions(isEnabled); 64 return true; 65 } 66 67 @Override updateState(Preference preference)68 public void updateState(Preference preference) { 69 final int mode = Settings.Global.getInt(mContext.getContentResolver(), 70 Settings.Global.ALWAYS_FINISH_ACTIVITIES, SETTING_VALUE_OFF); 71 ((SwitchPreference) mPreference).setChecked(mode != SETTING_VALUE_OFF); 72 } 73 74 @Override onDeveloperOptionsSwitchDisabled()75 protected void onDeveloperOptionsSwitchDisabled() { 76 super.onDeveloperOptionsSwitchDisabled(); 77 writeImmediatelyDestroyActivitiesOptions(false); 78 ((SwitchPreference) mPreference).setChecked(false); 79 } 80 writeImmediatelyDestroyActivitiesOptions(boolean isEnabled)81 private void writeImmediatelyDestroyActivitiesOptions(boolean isEnabled) { 82 try { 83 mActivityManager.setAlwaysFinish(isEnabled); 84 } catch (RemoteException ex) { 85 // intentional no-op 86 } 87 } 88 89 @VisibleForTesting getActivityManager()90 IActivityManager getActivityManager() { 91 return ActivityManager.getService(); 92 } 93 } 94