1 /* 2 * Copyright (C) 2015 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 android.support.v7.preference; 18 19 import android.content.Context; 20 import android.content.res.TypedArray; 21 import android.support.v4.content.res.TypedArrayUtils; 22 import android.util.AttributeSet; 23 import android.view.View; 24 import android.view.accessibility.AccessibilityManager; 25 import android.widget.Checkable; 26 import android.widget.CompoundButton; 27 28 /** 29 * A {@link Preference} that provides checkbox widget 30 * functionality. 31 * <p> 32 * This preference will store a boolean into the SharedPreferences. 33 * 34 * @attr name android:summaryOff 35 * @attr name android:summaryOn 36 * @attr name android:disableDependentsState 37 */ 38 public class CheckBoxPreference extends TwoStatePreference { 39 private final Listener mListener = new Listener(); 40 41 private class Listener implements CompoundButton.OnCheckedChangeListener { 42 @Override onCheckedChanged(CompoundButton buttonView, boolean isChecked)43 public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { 44 if (!callChangeListener(isChecked)) { 45 // Listener didn't like it, change it back. 46 // CompoundButton will make sure we don't recurse. 47 buttonView.setChecked(!isChecked); 48 return; 49 } 50 CheckBoxPreference.this.setChecked(isChecked); 51 } 52 } 53 CheckBoxPreference(Context context, AttributeSet attrs, int defStyleAttr)54 public CheckBoxPreference(Context context, AttributeSet attrs, int defStyleAttr) { 55 this(context, attrs, defStyleAttr, 0); 56 } 57 CheckBoxPreference( Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)58 public CheckBoxPreference( 59 Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { 60 super(context, attrs, defStyleAttr, defStyleRes); 61 62 final TypedArray a = context.obtainStyledAttributes(attrs, 63 R.styleable.CheckBoxPreference, defStyleAttr, defStyleRes); 64 65 setSummaryOn(TypedArrayUtils.getString(a, R.styleable.CheckBoxPreference_summaryOn, 66 R.styleable.CheckBoxPreference_android_summaryOn)); 67 68 setSummaryOff(TypedArrayUtils.getString(a, R.styleable.CheckBoxPreference_summaryOff, 69 R.styleable.CheckBoxPreference_android_summaryOff)); 70 71 setDisableDependentsState(TypedArrayUtils.getBoolean(a, 72 R.styleable.CheckBoxPreference_disableDependentsState, 73 R.styleable.CheckBoxPreference_android_disableDependentsState, false)); 74 75 a.recycle(); 76 } 77 CheckBoxPreference(Context context, AttributeSet attrs)78 public CheckBoxPreference(Context context, AttributeSet attrs) { 79 this(context, attrs, TypedArrayUtils.getAttr(context, R.attr.checkBoxPreferenceStyle, 80 android.R.attr.checkBoxPreferenceStyle)); 81 } 82 CheckBoxPreference(Context context)83 public CheckBoxPreference(Context context) { 84 this(context, null); 85 } 86 87 @Override onBindViewHolder(PreferenceViewHolder holder)88 public void onBindViewHolder(PreferenceViewHolder holder) { 89 super.onBindViewHolder(holder); 90 91 syncCheckboxView(holder.findViewById(android.R.id.checkbox)); 92 93 syncSummaryView(holder); 94 } 95 96 /** 97 * @hide 98 */ 99 @Override performClick(View view)100 protected void performClick(View view) { 101 super.performClick(view); 102 syncViewIfAccessibilityEnabled(view); 103 } 104 syncViewIfAccessibilityEnabled(View view)105 private void syncViewIfAccessibilityEnabled(View view) { 106 AccessibilityManager accessibilityManager = (AccessibilityManager) 107 getContext().getSystemService(Context.ACCESSIBILITY_SERVICE); 108 if (!accessibilityManager.isEnabled()) { 109 return; 110 } 111 112 View checkboxView = view.findViewById(android.R.id.checkbox); 113 syncCheckboxView(checkboxView); 114 115 View summaryView = view.findViewById(android.R.id.summary); 116 syncSummaryView(summaryView); 117 } 118 syncCheckboxView(View view)119 private void syncCheckboxView(View view) { 120 if (view instanceof CompoundButton) { 121 ((CompoundButton) view).setOnCheckedChangeListener(null); 122 } 123 if (view instanceof Checkable) { 124 ((Checkable) view).setChecked(mChecked); 125 } 126 if (view instanceof CompoundButton) { 127 ((CompoundButton) view).setOnCheckedChangeListener(mListener); 128 } 129 } 130 } 131