1 /* 2 * Copyright (C) 2009 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.camera; 18 19 import android.content.Context; 20 import android.preference.ListPreference; 21 import android.util.AttributeSet; 22 23 /** {@code BooleanListPreference} is used for those {@code SharedPreference} 24 * which stores value in the type of {@code Boolean} but would like to be shown 25 * as two radio buttons instead of a checkbox. 26 */ 27 public class BooleanListPreference extends ListPreference { 28 BooleanListPreference(Context context, AttributeSet attrs)29 public BooleanListPreference(Context context, AttributeSet attrs) { 30 super(context, attrs); 31 CharSequence values[] = getEntryValues(); 32 if (values.length == 2) { 33 boolean x = Boolean.valueOf(values[0].toString()); 34 boolean y = Boolean.valueOf(values[1].toString()); 35 if (x != y) return; 36 } 37 throw new IllegalStateException( 38 "EntryValues should be boolean strings"); 39 } 40 41 @Override persistString(String value)42 protected boolean persistString(String value) { 43 return persistBoolean(Boolean.valueOf(value)); 44 } 45 46 @Override getPersistedString(String defaultValue)47 protected String getPersistedString(String defaultValue) { 48 return Boolean.toString( 49 getPersistedBoolean(Boolean.valueOf(defaultValue))); 50 } 51 } 52