YearPickerView.java revision 2e00aa34c051111529290cf23c6ba940c2c0c142
1/* 2 * Copyright (C) 2013 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 17package com.android.datetimepicker.date; 18 19import android.content.Context; 20import android.content.res.Resources; 21import android.graphics.drawable.StateListDrawable; 22import android.view.View; 23import android.view.ViewGroup; 24import android.widget.AdapterView; 25import android.widget.AdapterView.OnItemClickListener; 26import android.widget.ArrayAdapter; 27import android.widget.ListView; 28import android.widget.TextView; 29 30import com.android.datetimepicker.R; 31import com.android.datetimepicker.date.DatePickerDialog.OnDateChangedListener; 32 33import java.util.ArrayList; 34import java.util.List; 35 36/** 37 * Displays a selectable list of years. 38 */ 39public class YearPickerView extends ListView implements OnItemClickListener, OnDateChangedListener { 40 41 private final DatePickerController mController; 42 private YearAdapter mAdapter; 43 private int mViewSize; 44 private int mChildSize; 45 private TextViewWithCircularIndicator mSelectedView; 46 47 /** 48 * @param context 49 */ 50 public YearPickerView(Context context, DatePickerController controller) { 51 super(context); 52 mController = controller; 53 mController.registerOnDateChangedListener(this); 54 setVerticalFadingEdgeEnabled(true); 55 ViewGroup.LayoutParams frame = new ViewGroup.LayoutParams(LayoutParams.MATCH_PARENT, 56 LayoutParams.WRAP_CONTENT); 57 setLayoutParams(frame); 58 Resources res = context.getResources(); 59 mViewSize = res.getDimensionPixelOffset(R.dimen.pager_height); 60 mChildSize = res.getDimensionPixelOffset(R.dimen.year_label_height); 61 setFadingEdgeLength(mChildSize / 3); 62 init(context); 63 setOnItemClickListener(this); 64 setSelector(new StateListDrawable()); 65 setDividerHeight(0); 66 onDateChanged(); 67 } 68 69 private void init(Context context) { 70 ArrayList<String> years = new ArrayList<String>(); 71 for (int year = mController.getMinYear(); year <= mController.getMaxYear(); year++) { 72 years.add(Integer.valueOf(year).toString()); 73 } 74 mAdapter = new YearAdapter(context, R.layout.year_label_text_view, years); 75 setAdapter(mAdapter); 76 } 77 78 @Override 79 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 80 mController.tryVibrate(); 81 TextViewWithCircularIndicator clickedView = (TextViewWithCircularIndicator) view; 82 if (mSelectedView != clickedView) { 83 mSelectedView.drawIndicator(false); 84 mSelectedView.requestLayout(); 85 clickedView.drawIndicator(true); 86 clickedView.requestLayout(); 87 mSelectedView = clickedView; 88 } 89 mController.onYearSelected(getYearFromTextView(clickedView)); 90 mAdapter.notifyDataSetChanged(); 91 } 92 93 private int getYearFromTextView(TextView view) { 94 return Integer.valueOf(view.getText().toString()); 95 } 96 97 private class YearAdapter extends ArrayAdapter<String> { 98 99 public YearAdapter(Context context, int resource, List<String> objects) { 100 super(context, resource, objects); 101 } 102 103 @Override 104 public View getView(int position, View convertView, ViewGroup parent) { 105 TextViewWithCircularIndicator v = (TextViewWithCircularIndicator) 106 super.getView(position, convertView, parent); 107 v.requestLayout(); 108 int year = getYearFromTextView(v); 109 boolean selected = mController.getSelectedDay().year == year; 110 v.drawIndicator(selected); 111 if (selected) { 112 mSelectedView = v; 113 } 114 return v; 115 } 116 } 117 118 public void postSetSelection(final int position) { 119 post(new Runnable() { 120 121 @Override 122 public void run() { 123 setSelection(position); 124 requestLayout(); 125 } 126 }); 127 } 128 129 public void postSetSelectionFromTop(final int position) { 130 post(new Runnable() { 131 132 @Override 133 public void run() { 134 setSelectionFromTop(position, mViewSize / 2 - mChildSize / 2); 135 requestLayout(); 136 } 137 }); 138 } 139 140 @Override 141 public void onDateChanged() { 142 mAdapter.notifyDataSetChanged(); 143 postSetSelectionFromTop(mController.getSelectedDay().year - mController.getMinYear()); 144 } 145} 146