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這里有您想知道的互聯(lián)網(wǎng)營銷解決方案
使得ListView能夠呈現(xiàn)多種布局的多布局適配器
ListView用了SimpleAdapter之后就只能呈現(xiàn)一種Layout，這樣雖然簡單但是有時不能滿足需求。所以，我下載SDK的源碼重寫了SimpleAdapter，你可以看出那些JavaDoc還是之前SimpleAdapter的JavaDoc。
各位下載了之后能將它當成SimpleAdapter使用。
主要修改的地方是：
1、構造方法不再接受單個Layout Resource，能接受Resource數(shù)組。
2、能夠根據(jù) ItemViewType來選擇Resource，所以子類應該要重寫 getItemViewType 和 getViewTypeCount(可選)。
感謝各位的使用與支持！
- ?
- /*
- * Copyright (C) 2006 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- package android.widget;
- import java.util.ArrayList;
- import java.util.List;
- import java.util.Map;
- import android.content.Context;
- import android.net.Uri;
- import android.view.LayoutInflater;
- import android.view.View;
- import android.view.ViewGroup;
- import android.widget.BaseAdapter;
- import android.widget.Checkable;
- import android.widget.Filter;
- import android.widget.Filterable;
- import android.widget.ImageView;
- import android.widget.Spinner;
- import android.widget.TextView;
- /**
- * 這是一個簡單的適配器，可以將靜態(tài)數(shù)據(jù)映射到XML文件中定義好的視圖.
- * 你可以將 Maps 的 ArrayList 指定為用于列表的數(shù)據(jù).ArrayList 中的每一項對應列表中的一行.
- * Maps 中包含用于一行的數(shù)據(jù).你也可以指定 XML 文件，其中定義了用于顯示行的視圖，通過
- * Map 的關鍵字映射到指定的視圖.
- * 綁定數(shù)據(jù)到視圖分兩個階段.首先，如果 {@link android.widget.SimpleAdapter.ViewBinder} 是有效的，
- * 則調用 {@link ViewBinder#setViewValue(android.view.View, Object, String)} 方法.
- * 如果返回值為真，則執(zhí)行綁定.如果返回值為假，則按以下順序綁定視圖：
- *
- *
- 實現(xiàn)了 Checkable 的視圖（例如 CheckBox），期望綁定值是布爾類型.
- *
- TextView，期望綁定值是字符串類型，通過調用 {@link #setViewText(TextView, String)} 綁定.
- *
- ImageView，期望綁定值是資源 ID 或者一個字符串，通過調用
- * {@link #setViewImage(ImageView, int)} 或 {@link #setViewImage(ImageView, String)}綁定.
- *
- * 如果沒有合適的綁定發(fā)生，將會拋出 {@link IllegalStateException} 異常.
- * @author translate by 德羅德
- * @author convert by cnmahj
- */
- public class MultiLayoutSimpleAdapter extends BaseAdapter implements Filterable {
- private int[] mTo;
- private String[] mFrom;
- private ViewBinder mViewBinder;
- protected List extends Map
- private int[] mResources;
- private int[] mDropDownResources;
- private LayoutInflater mInflater;
- private SimpleFilter mFilter;
- private ArrayList
- /**
- * 構造函數(shù)
- *
- * @param context 與 SimpleAdapter 關聯(lián)的運行著的視圖的上下文.
- * @param data Map 的列表.列表中的每個條目對應一行.Maps 中包含所有在 from 中指定的數(shù)據(jù).
- * @param resource 定義列表項目的視圖布局的資源 ID.布局文件至少應該包含在 to 中定義了的名稱.
- * @param from 與 Map 中的項目建立關聯(lián)的列名的列表.
- * @param to 用于顯示 from 中參數(shù)中的列的視圖列表.這些視圖應該都是 TextView 類型的.
- * 該列表中的第 N 個視圖顯示從參數(shù) from 中的第 N 列獲取的值.
- */
- public MultiLayoutSimpleAdapter(Context context, List extends Map
- int[] resources, String[] from, int[] to) {
- mData = data;
- mResources = mDropDownResources = resources;
- mFrom = from;
- mTo = to;
- mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
- }
- @Override
- public int getViewTypeCount() {
- return mResources.length;
- }
- /**
- * @see android.widget.Adapter#getCount()
- */
- public int getCount() {
- return mData.size();
- }
- /**
- * @see android.widget.Adapter#getItem(int)
- */
- public Object getItem(int position) {
- return mData.get(position);
- }
- /**
- * @see android.widget.Adapter#getItemId(int)
- */
- public long getItemId(int position) {
- return position;
- }
- /**
- * @see android.widget.Adapter#getView(int, View, ViewGroup)
- */
- public View getView(int position, View convertView, ViewGroup parent) {
- return createViewFromResource(position, convertView, parent, mResources[getItemViewType(position)]);
- }
- private View createViewFromResource(int position, View convertView,
- ViewGroup parent, int resource) {
- View v;
- if (convertView == null) {
- v = mInflater.inflate(resource, parent, false);
- } else {
- v = convertView;
- }
- bindView(position, v);
- return v;
- }
- /**
- *
設置創(chuàng)建下拉列表視圖的布局資源 ID.
- *
- * @param resource 定義下拉列表視圖的布局資源 ID.
- * @see #getDropDownView(int, android.view.View, android.view.ViewGroup)
- */
- public void setDropDownViewResource(int[] resources) {
- this.mDropDownResources = resources;
- }
- @Override
- public View getDropDownView(int position, View convertView, ViewGroup parent) {
- return createViewFromResource(position, convertView, parent, mResources[getItemViewType(position)]);
- }
- private void bindView(int position, View view) {
- final Map
- if (dataSet == null) {
- return;
- }
- final ViewBinder binder = mViewBinder;
- final String[] from = mFrom;
- final int[] to = mTo;
- final int count = to.length;
- for (int i = 0; i < count; i++) {
- final View v = view.findViewById(to[i]);
- if (v != null) {
- final Object data = dataSet.get(from[i]);
- String text = data == null ? "" : data.toString();
- if (text == null) {
- text = "";
- }
- boolean bound = false;
- if (binder != null) {
- bound = binder.setViewValue(v, data, text);
- }
- if (!bound) {
- if (v instanceof Checkable) {
- if (data instanceof Boolean) {
- ((Checkable) v).setChecked((Boolean) data);
- } else if (v instanceof TextView) {
- // Note: keep the instanceof TextView check at the bottom of these
- // ifs since a lot of views are TextViews (e.g. CheckBoxes).
- setViewText((TextView) v, text);
- } else {
- throw new IllegalStateException(v.getClass().getName() +
- " should be bound to a Boolean, not a " +
- (data == null ? " : data.getClass()));
- }
- } else if (v instanceof TextView) {
- // Note: keep the instanceof TextView check at the bottom of these
- // ifs since a lot of views are TextViews (e.g. CheckBoxes).
- setViewText((TextView) v, text);
- } else if (v instanceof ImageView) {
- if (data instanceof Integer) {
- setViewImage((ImageView) v, (Integer) data);
- } else {
- setViewImage((ImageView) v, text);
- }
- } else if (v instanceof Spinner) {
- if (data instanceof Integer) {
- ((Spinner)v).setSelection((Integer) data);
- } else {
- continue;
- }
- } else {
- throw new IllegalStateException(v.getClass().getName() + " is not a " +
- " view that can be bounds by this SimpleAdapter");
- }
- }
- }
- }
- }
- /**
- * 返回用于將數(shù)據(jù)綁定到視圖的 {@link ViewBinder}.
- *
- * @return ViewBinder，如果綁定器不存在則返回 null.
- *
- * @see #setViewBinder(android.widget.SimpleAdapter.ViewBinder)
- */
- public ViewBinder getViewBinder() {
- return mViewBinder;
- }
- /**
- * 設置用于將數(shù)據(jù)綁定到視圖的綁定器.
- *
- * @param viewBinder 用于將數(shù)據(jù)綁定到視圖的綁定器.設置為 null，可以刪除既存的綁定器.
- *
- * @see #getViewBinder()
- */
- public void setViewBinder(ViewBinder viewBinder) {
- mViewBinder = viewBinder;
- }
- /**
- * 由 bindView() 方法調用，用于為 ImageView 設置圖像.只在
- * ViewBinder 不存在或者既存的 ViewBinder 無法處理 ImageView 的綁定時才調用.
- *
- * 如果調用 {@link #setViewImage(ImageView, String)} 方法時提供的
- * value 參數(shù)可以轉換為整數(shù)類型，則會自動調用本方法.
- *
- * @param v 接收圖像的 ImageView.
- * @param value 從數(shù)據(jù)集獲取到的值
- *
- * @see #setViewImage(ImageView, String)
- */
- public void setViewImage(ImageView v, int value) {
- v.setImageResource(value);
- }
- /**
- * 由 bindView() 方法調用，用于為 ImageView 設置圖像.只在
- * ViewBinder 不存在或者既存的 ViewBinder 無法處理 ImageView 的綁定時才調用.
- *
- * 本方法默認將 value 作為圖像資源 ID 來對待；當 value
- * 無法變換為整數(shù)類型時，才作為圖像的 Uri 來使用.
- *
- * @param v 接收圖像的 ImageView.
- * @param value 從數(shù)據(jù)集獲取到的值.
- *
- * @see #setViewImage(ImageView, int)
- */
- public void setViewImage(ImageView v, String value) {
- try {
- v.setImageResource(Integer.parseInt(value));
- } catch (NumberFormatException nfe) {
- v.setImageURI(Uri.parse(value));
- }
- }
- /**
- * 由 bindView() 方法調用，用于為 TextView 設置文本.只在
- * ViewBinder 不存在或者既存的 ViewBinder 無法處理 TextView 的綁定時才調用.
- *
- * @param v 接收文本的 TextView.
- * @param text 設置到 TextView 的文本.
- */
- public void setViewText(TextView v, String text) {
- v.setText(text);
- }
- public Filter getFilter() {
- if (mFilter == null) {
- mFilter = new SimpleFilter();
- }
- return mFilter;
- }
- /**
- * 該類用于 SimpleAdapter 的外部客戶將適配器的值綁定到視圖.
- *
- * 你可以使用此類將 SimpleAdapter 不支持的值綁定到視圖，或者改變 SimpleAdapter
- * 支持的視圖的綁定方式.
- *
- * @see MultiLayoutSimpleAdapter#setViewImage(ImageView, int)
- * @see MultiLayoutSimpleAdapter#setViewImage(ImageView, String)
- * @see MultiLayoutSimpleAdapter#setViewText(TextView, String)
- */
- public static interface ViewBinder {
- /**
- * 綁定指定的數(shù)據(jù)到指定的視圖.
- *
- * 當使用 ViewBinder 綁定了數(shù)據(jù)時，必須返回真.如果該方法返回假，
- * SimpleAdapter 會用自己的方式去綁定數(shù)據(jù).
- *
- * @param view 要綁定數(shù)據(jù)的視圖
- * @param data 綁定用的數(shù)據(jù)
- * @param textRepresentation 代表所提供的數(shù)據(jù)的安全字符串：
- * 或者是 data.toString()，或者是空串，不能為空.
- *
- * @return 如果將數(shù)據(jù)綁定到了視圖，返回真；否則返回假.
- */
- boolean setViewValue(View view, Object data, String textRepresentation);
- }
- /**
- *
An array filters constrains the content of the array adapter with
- * a prefix. Each item that does not start with the supplied prefix
- * is removed from the list.
- */
- private class SimpleFilter extends Filter {
- @Override
- protected FilterResults performFiltering(CharSequence prefix) {
- FilterResults results = new FilterResults();
- if (mUnfilteredData == null) {
- mUnfilteredData = new ArrayList
- }
- if (prefix == null || prefix.length() == 0) {
- ArrayList
- results.values = list;
- results.count = list.size();
- } else {
- String prefixString = prefix.toString().toLowerCase();
- ArrayList
- int count = unfilteredValues.size();
- ArrayList
- for (int i = 0; i < count; i++) {
- Map
- if (h != null) {
- int len = mTo.length;
- for (int j=0; j
- String str = (String)h.get(mFrom[j]);
- String[] words = str.split(" ");
- int wordCount = words.length;
- for (int k = 0; k < wordCount; k++) {
- String word = words[k];
- if (word.toLowerCase().startsWith(prefixString)) {
- newValues.add(h);
- break;
- }
- }
- }
- }
- }
- results.values = newValues;
- results.count = newValues.size();
- }
- return results;
- }
- @Override
- protected void publishResults(CharSequence constraint, FilterResults results) {
- //noinspection unchecked
- mData = (List
- if (results.count > 0) {
- notifyDataSetChanged();
- } else {
- notifyDataSetInvalidated();
- }
- }
- }
- }
本文名稱：使得ListView能夠呈現(xiàn)多種布局的多布局適配器
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