1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file 5 * except in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the 10 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 11 * KIND, either express or implied. See the License for the specific language governing 12 * permissions and limitations under the License. 13 */ 14 package com.android.settings.display; 15 16 import android.app.admin.DevicePolicyManager; 17 import android.content.Context; 18 import android.os.UserHandle; 19 import android.provider.Settings; 20 import android.support.v7.preference.Preference; 21 import android.util.Log; 22 23 import com.android.settings.R; 24 import com.android.settings.TimeoutListPreference; 25 import com.android.settings.core.PreferenceController; 26 import com.android.settingslib.RestrictedLockUtils; 27 28 import static android.provider.Settings.System.SCREEN_OFF_TIMEOUT; 29 30 public class TimeoutPreferenceController extends PreferenceController implements 31 Preference.OnPreferenceChangeListener { 32 33 private static final String TAG = "TimeoutPrefContr"; 34 35 /** If there is no setting in the provider, use this. */ 36 public static final int FALLBACK_SCREEN_TIMEOUT_VALUE = 30000; 37 38 private final String mScreenTimeoutKey; 39 TimeoutPreferenceController(Context context, String key)40 public TimeoutPreferenceController(Context context, String key) { 41 super(context); 42 mScreenTimeoutKey = key; 43 } 44 45 @Override isAvailable()46 public boolean isAvailable() { 47 return true; 48 } 49 50 @Override getPreferenceKey()51 public String getPreferenceKey() { 52 return mScreenTimeoutKey; 53 } 54 55 @Override updateState(Preference preference)56 public void updateState(Preference preference) { 57 final TimeoutListPreference timeoutListPreference = (TimeoutListPreference) preference; 58 final long currentTimeout = Settings.System.getLong(mContext.getContentResolver(), 59 SCREEN_OFF_TIMEOUT, FALLBACK_SCREEN_TIMEOUT_VALUE); 60 timeoutListPreference.setValue(String.valueOf(currentTimeout)); 61 final DevicePolicyManager dpm = (DevicePolicyManager) mContext.getSystemService( 62 Context.DEVICE_POLICY_SERVICE); 63 if (dpm != null) { 64 final RestrictedLockUtils.EnforcedAdmin admin = 65 RestrictedLockUtils.checkIfMaximumTimeToLockIsSet(mContext); 66 final long maxTimeout = 67 dpm.getMaximumTimeToLockForUserAndProfiles(UserHandle.myUserId()); 68 timeoutListPreference.removeUnusableTimeouts(maxTimeout, admin); 69 } 70 updateTimeoutPreferenceDescription(timeoutListPreference, currentTimeout); 71 } 72 73 @Override onPreferenceChange(Preference preference, Object newValue)74 public boolean onPreferenceChange(Preference preference, Object newValue) { 75 try { 76 int value = Integer.parseInt((String) newValue); 77 Settings.System.putInt(mContext.getContentResolver(), SCREEN_OFF_TIMEOUT, value); 78 updateTimeoutPreferenceDescription((TimeoutListPreference) preference, value); 79 } catch (NumberFormatException e) { 80 Log.e(TAG, "could not persist screen timeout setting", e); 81 } 82 return true; 83 } 84 getTimeoutDescription( long currentTimeout, CharSequence[] entries, CharSequence[] values)85 public static CharSequence getTimeoutDescription( 86 long currentTimeout, CharSequence[] entries, CharSequence[] values) { 87 if (currentTimeout < 0 || entries == null || values == null 88 || values.length != entries.length) { 89 return null; 90 } 91 92 for (int i = 0; i < values.length; i++) { 93 long timeout = Long.parseLong(values[i].toString()); 94 if (currentTimeout == timeout) { 95 return entries[i]; 96 } 97 } 98 return null; 99 } 100 updateTimeoutPreferenceDescription(TimeoutListPreference preference, long currentTimeout)101 private void updateTimeoutPreferenceDescription(TimeoutListPreference preference, 102 long currentTimeout) { 103 final CharSequence[] entries = preference.getEntries(); 104 final CharSequence[] values = preference.getEntryValues(); 105 final String summary; 106 if (preference.isDisabledByAdmin()) { 107 summary = mContext.getString(com.android.settings.R.string.disabled_by_policy_title); 108 } else { 109 final CharSequence timeoutDescription = getTimeoutDescription( 110 currentTimeout, entries, values); 111 summary = timeoutDescription == null 112 ? "" 113 : mContext.getString(R.string.screen_timeout_summary, timeoutDescription); 114 } 115 preference.setSummary(summary); 116 } 117 118 } 119