1 /* 2 * Copyright (C) 2010 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; 18 19 import static android.provider.Settings.System.SCREEN_OFF_TIMEOUT; 20 21 import android.app.ActivityManagerNative; 22 import android.app.admin.DevicePolicyManager; 23 import android.content.ContentResolver; 24 import android.content.Context; 25 import android.content.res.Configuration; 26 import android.content.res.Resources; 27 import android.os.Bundle; 28 import android.os.RemoteException; 29 import android.preference.CheckBoxPreference; 30 import android.preference.ListPreference; 31 import android.preference.Preference; 32 import android.preference.PreferenceScreen; 33 import android.provider.Settings; 34 import android.provider.Settings.SettingNotFoundException; 35 import android.util.Log; 36 37 import com.android.internal.view.RotationPolicy; 38 import com.android.settings.DreamSettings; 39 40 import java.util.ArrayList; 41 42 public class DisplaySettings extends SettingsPreferenceFragment implements 43 Preference.OnPreferenceChangeListener { 44 private static final String TAG = "DisplaySettings"; 45 46 /** If there is no setting in the provider, use this. */ 47 private static final int FALLBACK_SCREEN_TIMEOUT_VALUE = 30000; 48 49 private static final String KEY_SCREEN_TIMEOUT = "screen_timeout"; 50 private static final String KEY_ACCELEROMETER = "accelerometer"; 51 private static final String KEY_FONT_SIZE = "font_size"; 52 private static final String KEY_NOTIFICATION_PULSE = "notification_pulse"; 53 private static final String KEY_SCREEN_SAVER = "screensaver"; 54 55 private CheckBoxPreference mAccelerometer; 56 private ListPreference mFontSizePref; 57 private CheckBoxPreference mNotificationPulse; 58 59 private final Configuration mCurConfig = new Configuration(); 60 61 private ListPreference mScreenTimeoutPreference; 62 private Preference mScreenSaverPreference; 63 64 private final RotationPolicy.RotationPolicyListener mRotationPolicyListener = 65 new RotationPolicy.RotationPolicyListener() { 66 @Override 67 public void onChange() { 68 updateAccelerometerRotationCheckbox(); 69 } 70 }; 71 72 @Override onCreate(Bundle savedInstanceState)73 public void onCreate(Bundle savedInstanceState) { 74 super.onCreate(savedInstanceState); 75 ContentResolver resolver = getActivity().getContentResolver(); 76 77 addPreferencesFromResource(R.xml.display_settings); 78 79 mAccelerometer = (CheckBoxPreference) findPreference(KEY_ACCELEROMETER); 80 mAccelerometer.setPersistent(false); 81 if (RotationPolicy.isRotationLockToggleSupported(getActivity())) { 82 // If rotation lock is supported, then we do not provide this option in 83 // Display settings. However, is still available in Accessibility settings. 84 getPreferenceScreen().removePreference(mAccelerometer); 85 } 86 87 mScreenSaverPreference = findPreference(KEY_SCREEN_SAVER); 88 if (mScreenSaverPreference != null 89 && getResources().getBoolean( 90 com.android.internal.R.bool.config_enableDreams) == false) { 91 getPreferenceScreen().removePreference(mScreenSaverPreference); 92 } 93 94 mScreenTimeoutPreference = (ListPreference) findPreference(KEY_SCREEN_TIMEOUT); 95 final long currentTimeout = Settings.System.getLong(resolver, SCREEN_OFF_TIMEOUT, 96 FALLBACK_SCREEN_TIMEOUT_VALUE); 97 mScreenTimeoutPreference.setValue(String.valueOf(currentTimeout)); 98 mScreenTimeoutPreference.setOnPreferenceChangeListener(this); 99 disableUnusableTimeouts(mScreenTimeoutPreference); 100 updateTimeoutPreferenceDescription(currentTimeout); 101 102 mFontSizePref = (ListPreference) findPreference(KEY_FONT_SIZE); 103 mFontSizePref.setOnPreferenceChangeListener(this); 104 mNotificationPulse = (CheckBoxPreference) findPreference(KEY_NOTIFICATION_PULSE); 105 if (mNotificationPulse != null 106 && getResources().getBoolean( 107 com.android.internal.R.bool.config_intrusiveNotificationLed) == false) { 108 getPreferenceScreen().removePreference(mNotificationPulse); 109 } else { 110 try { 111 mNotificationPulse.setChecked(Settings.System.getInt(resolver, 112 Settings.System.NOTIFICATION_LIGHT_PULSE) == 1); 113 mNotificationPulse.setOnPreferenceChangeListener(this); 114 } catch (SettingNotFoundException snfe) { 115 Log.e(TAG, Settings.System.NOTIFICATION_LIGHT_PULSE + " not found"); 116 } 117 } 118 119 } 120 updateTimeoutPreferenceDescription(long currentTimeout)121 private void updateTimeoutPreferenceDescription(long currentTimeout) { 122 ListPreference preference = mScreenTimeoutPreference; 123 String summary; 124 if (currentTimeout < 0) { 125 // Unsupported value 126 summary = ""; 127 } else { 128 final CharSequence[] entries = preference.getEntries(); 129 final CharSequence[] values = preference.getEntryValues(); 130 int best = 0; 131 for (int i = 0; i < values.length; i++) { 132 long timeout = Long.parseLong(values[i].toString()); 133 if (currentTimeout >= timeout) { 134 best = i; 135 } 136 } 137 summary = preference.getContext().getString(R.string.screen_timeout_summary, 138 entries[best]); 139 } 140 preference.setSummary(summary); 141 } 142 disableUnusableTimeouts(ListPreference screenTimeoutPreference)143 private void disableUnusableTimeouts(ListPreference screenTimeoutPreference) { 144 final DevicePolicyManager dpm = 145 (DevicePolicyManager) getActivity().getSystemService( 146 Context.DEVICE_POLICY_SERVICE); 147 final long maxTimeout = dpm != null ? dpm.getMaximumTimeToLock(null) : 0; 148 if (maxTimeout == 0) { 149 return; // policy not enforced 150 } 151 final CharSequence[] entries = screenTimeoutPreference.getEntries(); 152 final CharSequence[] values = screenTimeoutPreference.getEntryValues(); 153 ArrayList<CharSequence> revisedEntries = new ArrayList<CharSequence>(); 154 ArrayList<CharSequence> revisedValues = new ArrayList<CharSequence>(); 155 for (int i = 0; i < values.length; i++) { 156 long timeout = Long.parseLong(values[i].toString()); 157 if (timeout <= maxTimeout) { 158 revisedEntries.add(entries[i]); 159 revisedValues.add(values[i]); 160 } 161 } 162 if (revisedEntries.size() != entries.length || revisedValues.size() != values.length) { 163 screenTimeoutPreference.setEntries( 164 revisedEntries.toArray(new CharSequence[revisedEntries.size()])); 165 screenTimeoutPreference.setEntryValues( 166 revisedValues.toArray(new CharSequence[revisedValues.size()])); 167 final int userPreference = Integer.parseInt(screenTimeoutPreference.getValue()); 168 if (userPreference <= maxTimeout) { 169 screenTimeoutPreference.setValue(String.valueOf(userPreference)); 170 } else { 171 // There will be no highlighted selection since nothing in the list matches 172 // maxTimeout. The user can still select anything less than maxTimeout. 173 // TODO: maybe append maxTimeout to the list and mark selected. 174 } 175 } 176 screenTimeoutPreference.setEnabled(revisedEntries.size() > 0); 177 } 178 floatToIndex(float val)179 int floatToIndex(float val) { 180 String[] indices = getResources().getStringArray(R.array.entryvalues_font_size); 181 float lastVal = Float.parseFloat(indices[0]); 182 for (int i=1; i<indices.length; i++) { 183 float thisVal = Float.parseFloat(indices[i]); 184 if (val < (lastVal + (thisVal-lastVal)*.5f)) { 185 return i-1; 186 } 187 lastVal = thisVal; 188 } 189 return indices.length-1; 190 } 191 readFontSizePreference(ListPreference pref)192 public void readFontSizePreference(ListPreference pref) { 193 try { 194 mCurConfig.updateFrom(ActivityManagerNative.getDefault().getConfiguration()); 195 } catch (RemoteException e) { 196 Log.w(TAG, "Unable to retrieve font size"); 197 } 198 199 // mark the appropriate item in the preferences list 200 int index = floatToIndex(mCurConfig.fontScale); 201 pref.setValueIndex(index); 202 203 // report the current size in the summary text 204 final Resources res = getResources(); 205 String[] fontSizeNames = res.getStringArray(R.array.entries_font_size); 206 pref.setSummary(String.format(res.getString(R.string.summary_font_size), 207 fontSizeNames[index])); 208 } 209 210 @Override onResume()211 public void onResume() { 212 super.onResume(); 213 214 updateState(); 215 216 RotationPolicy.registerRotationPolicyListener(getActivity(), 217 mRotationPolicyListener); 218 } 219 220 @Override onPause()221 public void onPause() { 222 super.onPause(); 223 224 RotationPolicy.unregisterRotationPolicyListener(getActivity(), 225 mRotationPolicyListener); 226 } 227 updateState()228 private void updateState() { 229 updateAccelerometerRotationCheckbox(); 230 readFontSizePreference(mFontSizePref); 231 updateScreenSaverSummary(); 232 } 233 updateScreenSaverSummary()234 private void updateScreenSaverSummary() { 235 mScreenSaverPreference.setSummary( 236 DreamSettings.isScreenSaverEnabled(mScreenSaverPreference.getContext()) 237 ? R.string.screensaver_settings_summary_on 238 : R.string.screensaver_settings_summary_off); 239 } 240 updateAccelerometerRotationCheckbox()241 private void updateAccelerometerRotationCheckbox() { 242 if (getActivity() == null) return; 243 244 mAccelerometer.setChecked(!RotationPolicy.isRotationLocked(getActivity())); 245 } 246 writeFontSizePreference(Object objValue)247 public void writeFontSizePreference(Object objValue) { 248 try { 249 mCurConfig.fontScale = Float.parseFloat(objValue.toString()); 250 ActivityManagerNative.getDefault().updatePersistentConfiguration(mCurConfig); 251 } catch (RemoteException e) { 252 Log.w(TAG, "Unable to save font size"); 253 } 254 } 255 256 @Override onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference)257 public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) { 258 if (preference == mAccelerometer) { 259 RotationPolicy.setRotationLockForAccessibility( 260 getActivity(), !mAccelerometer.isChecked()); 261 } else if (preference == mNotificationPulse) { 262 boolean value = mNotificationPulse.isChecked(); 263 Settings.System.putInt(getContentResolver(), Settings.System.NOTIFICATION_LIGHT_PULSE, 264 value ? 1 : 0); 265 return true; 266 } 267 return super.onPreferenceTreeClick(preferenceScreen, preference); 268 } 269 onPreferenceChange(Preference preference, Object objValue)270 public boolean onPreferenceChange(Preference preference, Object objValue) { 271 final String key = preference.getKey(); 272 if (KEY_SCREEN_TIMEOUT.equals(key)) { 273 int value = Integer.parseInt((String) objValue); 274 try { 275 Settings.System.putInt(getContentResolver(), SCREEN_OFF_TIMEOUT, value); 276 updateTimeoutPreferenceDescription(value); 277 } catch (NumberFormatException e) { 278 Log.e(TAG, "could not persist screen timeout setting", e); 279 } 280 } 281 if (KEY_FONT_SIZE.equals(key)) { 282 writeFontSizePreference(objValue); 283 } 284 285 return true; 286 } 287 } 288