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 com.android.setupwizardlib.items; 18 19 import android.content.Context; 20 import android.content.res.TypedArray; 21 import android.util.AttributeSet; 22 23 import com.android.setupwizardlib.R; 24 25 import java.util.ArrayList; 26 27 /** 28 * An abstract item hierarchy; provides default implementation for ID and observers. 29 */ 30 public abstract class AbstractItemHierarchy implements ItemHierarchy { 31 32 private ArrayList<Observer> mObservers = new ArrayList<>(); 33 private int mId = 0; 34 35 public AbstractItemHierarchy() { 36 } 37 38 public AbstractItemHierarchy(Context context, AttributeSet attrs) { 39 TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.SuwAbstractItem); 40 mId = a.getResourceId(R.styleable.SuwAbstractItem_android_id, 0); 41 a.recycle(); 42 } 43 44 public void setId(int id) { 45 mId = id; 46 } 47 48 public int getId() { 49 return mId; 50 } 51 52 @Override 53 public void registerObserver(Observer observer) { 54 mObservers.add(observer); 55 } 56 57 @Override 58 public void unregisterObserver(Observer observer) { 59 mObservers.remove(observer); 60 } 61 62 public void notifyChanged() { 63 for (Observer observer : mObservers) { 64 observer.onChanged(this); 65 } 66 } 67 } 68
