背景
隨著公司業(yè)務(wù)越來越復(fù)雜，在同一個(gè)列表中需要展示各種類型的數(shù)據(jù)。
總體結(jié)構(gòu)
使用方法
每種類型卡片Item都實(shí)現(xiàn)ItemViewAdapter
package com.lkh.multiadapter;import android.support.annotation.LayoutRes;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import java.util.List;/** * 列表單項(xiàng)布局與數(shù)據(jù)綁定 * Created by luokanghui on 2017/5/24. */public abstract class ItemViewAdapter<E>{ /** * 返回列表單項(xiàng)View，如果View由資源layout加載而來，直接重寫{@link #onGetLayoutId()}即可 * @param parent 父view，一般為RecyclerView * @return 列表單項(xiàng)View */ public View onCreateView(ViewGroup parent){ return LayoutInflater.from(parent.getContext()).inflate(onGetLayoutId() , parent, false); } /** * 當(dāng)RecyclerViewHolder創(chuàng)建成功后調(diào)用，只會(huì)調(diào)用一次 * @param viewHolder 單項(xiàng)view集合 */ public void onCreate(RecyclerViewHolder viewHolder){ } /** * 返回單項(xiàng)布局的資源id，如果重寫了{(lán)@link #onCreateView(ViewGroup)}，則此方法可能失效 * @return 單項(xiàng)布局layout id */ @LayoutRes protected abstract int onGetLayoutId(); /** * 把數(shù)據(jù)與view進(jìn)行綁定，滑動(dòng)時(shí)都會(huì)調(diào)用 * @param viewHolder 單項(xiàng)view集合 * @param data 具體數(shù)據(jù) * @param position 在列表中的位置 */ public abstract void bindData(RecyclerViewHolder viewHolder, E data, int position); /** * 局部更新時(shí)調(diào)用 * @param viewHolder 單項(xiàng)view集合 * @param data 具體數(shù)據(jù) * @param position 在列表中的位置 * @param payloads 局部更新標(biāo)志，不會(huì)為空（isEmpty()==false) */ public void bindData(RecyclerViewHolder viewHolder, E data, int position, List<Object> payloads){ }}卡片1：
package com.lkh.multiadapter.sample;import android.widget.TextView;import com.lkh.multiadapter.ItemViewAdapter;import com.lkh.multiadapter.R;import com.lkh.multiadapter.RecyclerViewHolder;/** * 卡片1實(shí)現(xiàn) * Created by luokanghui on 2019/3/18 */public class SampleOneItemViewAdapter extends ItemViewAdapter<DataOne> { @Override protected int onGetLayoutId() { //布局layout資源id return R.layout.item_one; } @Override public void bindData(RecyclerViewHolder viewHolder, DataOne data, int position) { //根據(jù)id獲取view TextView tvContent = viewHolder.getView(R.id.tv_content); //數(shù)據(jù)綁定 tvContent.setText(data.getContent()); }}package com.lkh.multiadapter.sample;/** * 卡片1數(shù)據(jù) * Created by luokanghui on 2019/3/18 */public class DataOne { private String content; public String getContent() { return content; } public void setContent(String content) { this.content = content; }}item_one.xml:
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="#eeeeee" android:orientation="vertical"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="卡片1" android:textColor="#000000" /> <TextView android:id="@+id/tv_content" android:layout_width="wrap_content" android:layout_height="50dp" android:gravity="center" android:textColor="#000000" /></LinearLayout>
卡片2
package com.lkh.multiadapter.sample;import android.widget.TextView;import com.lkh.multiadapter.ItemViewAdapter;import com.lkh.multiadapter.R;import com.lkh.multiadapter.RecyclerViewHolder;/** * 卡片2實(shí)現(xiàn) * Created by luokanghui on 2019/3/18 */public class SampleTwoItemViewAdapter extends ItemViewAdapter<DataTwo> { @Override protected int onGetLayoutId() { //布局layout資源id return R.layout.item_two; } @Override public void bindData(RecyclerViewHolder viewHolder, DataTwo data, int position) { //根據(jù)id獲取view TextView tvNum = viewHolder.getView(R.id.tv_num); //數(shù)據(jù)綁定 tvNum.setText("num="+data.getNum()); }}package com.lkh.multiadapter.sample;/** * 卡片2數(shù)據(jù) * Created by luokanghui on 2019/3/18 */public class DataTwo { private int num; public int getNum() { return num; } public void setNum(int num) { this.num = num; }}item_two.xml:
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="#999999" android:orientation="vertical"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="卡片2" android:textColor="#0000ff" /> <TextView android:id="@+id/tv_num" android:layout_width="wrap_content" android:layout_height="100dp" android:gravity="center" android:textColor="#0000ff" /></LinearLayout>
總Adapter，繼承MultiRecyclerViewAdapter
package com.lkh.multiadapter.sample;import com.lkh.multiadapter.ItemViewAdapter;import com.lkh.multiadapter.MultiRecyclerViewAdapter;/** * 多布局adapter，根據(jù)不同data及position，使用不同ItemViewAdapter卡片 * Created by luokanghui on 2019/3/18 */public class SampleMultiAdapter extends MultiRecyclerViewAdapter<Object> { private static final int TYPE_EMPTY = 0;//空item private static final int TYPE_ONE = 1;//卡片1 private static final int TYPE_TWO = 2;//卡片2 @Override public int getViewType(Object data, int position) { if (data instanceof DataOne){//卡片1 return TYPE_ONE; } if (data instanceof DataTwo){//卡片2 return TYPE_TWO; } return TYPE_EMPTY;//空item } @Override public ItemViewAdapter onCreateItemViewAdapter(int viewType) { switch (viewType){ case TYPE_ONE://卡片1 return new SampleOneItemViewAdapter(); case TYPE_TWO://卡片2 return new SampleTwoItemViewAdapter(); default://空item return new EmptyItemViewAdapter(); } }}RecyclerView中使用
package com.lkh.multiadapter;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import com.lkh.multiadapter.sample.DataOne;import com.lkh.multiadapter.sample.DataTwo;import com.lkh.multiadapter.sample.SampleMultiAdapter;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); RecyclerView recyclerView = findViewById(R.id.recycler_view); recyclerView.setLayoutManager(new LinearLayoutManager(this)); SampleMultiAdapter adapter = new SampleMultiAdapter(); //設(shè)置數(shù)據(jù) adapter.setData(generateData()); //設(shè)置adapter recyclerView.setAdapter(adapter); } //造測試數(shù)據(jù) private List<Object> generateData(){ List<Object> list = new ArrayList<>(); for (int i=0; i<20; i++){ DataOne dataOne = new DataOne(); dataOne.setContent("這是卡片1數(shù)據(jù)："+i); list.add(dataOne); DataTwo dataTwo = new DataTwo(); dataTwo.setNum(i); list.add(dataTwo); } return list; }}activity_main.xml:
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <android.support.v7.widget.RecyclerView android:id="@+id/recycler_view" android:layout_width="match_parent" android:layout_height="match_parent"/></LinearLayout>
運(yùn)行效果如下：
總的來說，實(shí)現(xiàn)一個(gè)多類型布局列表只需要寫多個(gè)不同卡片ItemViewAdapter、繼承MultiRecyclerViewAdapter用來控制不同數(shù)據(jù)使用不同ItemViewAdapter，新增一個(gè)卡片只需要新增一個(gè)ItemViewAdapter，在MultiRecyclerViewAdapter新加一項(xiàng)即可，不會(huì)影響其它卡片使用，而且ItemViewAdapter完全獨(dú)立，可以很好的復(fù)用。
核心代碼
package com.lkh.multiadapter;import android.support.v7.widget.RecyclerView;import android.view.ViewGroup;import java.util.List;/** * 多種布局adapter * Created by luokanghui on 2017/5/24. */public abstract class MultiRecyclerViewAdapter<E> extends RecyclerView.Adapter<RecyclerViewHolder> implements ItemViewAdapterFactory<E> { public static final int NO_TYPE = -1; private List<E> dataList; protected final MapData mMapData = new MapData(); public MultiRecyclerViewAdapter setData(List<E> list) { this.dataList = list; return this; } @Override public RecyclerViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { ItemViewAdapter itemViewModule = onCreateItemViewAdapter(viewType); RecyclerViewHolder recyclerViewHolder = new RecyclerViewHolder(itemViewModule.onCreateView(parent), itemViewModule, this, getContextMap()); itemViewModule.onCreate(recyclerViewHolder); return recyclerViewHolder; } @Override public void onBindViewHolder(RecyclerViewHolder holder, int position) { if (checkItems(position)) { return; } holder.itemViewAdapter.bindData(holder, dataList.get(position), position); } @Override public void onBindViewHolder(RecyclerViewHolder holder, int position, List<Object> payloads) { if (checkItems(position)) { return; } if (payloads.isEmpty()) { super.onBindViewHolder(holder, position, payloads); } else { holder.itemViewAdapter.bindData(holder, dataList.get(position), position, payloads); } } @Override public int getItemViewType(int position) { if (checkItems(position)) { return NO_TYPE; } return getViewType(dataList.get(position), position); } @Override public int getItemCount() { return dataList == null ? 0 : dataList.size(); } /** * true表示沒通過 */ private boolean checkItems(int position) { return dataList == null || position < 0 || position >= dataList.size(); } @Override public MapData getContextMap() { return mMapData; }}package com.lkh.multiadapter;/** * 多布局ItemViewAdapter創(chuàng)建者 * Created by luokanghui on 2017/5/24. */public interface ItemViewAdapterFactory<E> { /** * 返回ItemViewAdapter的類型 * 建議根據(jù)data的數(shù)據(jù)類型判斷不同的viewType * @param data 具體數(shù)據(jù) * @param position 在列表中的位置 * @return 類型 */ int getViewType(E data, int position); /** * 根據(jù)不同的viewType返回不同的ItemViewAdapter * @param viewType 類型 * @return ItemViewAdapter */ ItemViewAdapter<? extends E> onCreateItemViewAdapter(int viewType); /** * 上下文數(shù)據(jù) * @return */ MapData getContextMap();}package com.lkh.multiadapter;import android.support.v7.widget.RecyclerView;import android.util.SparseArray;import android.view.View;/** * ViewHolder基類 */public final class RecyclerViewHolder extends RecyclerView.ViewHolder { private final SparseArray<View> views; ItemViewAdapter itemViewAdapter; private final RecyclerView.Adapter adapter; private final MapData mMapData ; public RecyclerViewHolder(View itemView, ItemViewAdapter itemViewAdapter, RecyclerView.Adapter adapter, MapData mapData) { super(itemView); this.views = new SparseArray<>(); this.itemViewAdapter = itemViewAdapter; this.adapter = adapter; this.mMapData = mapData; } /** * 根據(jù)id獲取view，如果緩存中存在，直接使用緩存中的，避免重復(fù)執(zhí)行findViewById */ @SuppressWarnings("unchecked") public <T extends View> T getView(int viewId) { View view = views.get(viewId); if (view == null) { view = itemView.findViewById(viewId); views.put(viewId, view); } return (T) view; } public RecyclerView.Adapter getAdapter(){ return adapter; } /** * 獲取數(shù)據(jù)上下文 */ public MapData getContextMap(){ return mMapData; }}package com.lkh.multiadapter;import android.support.annotation.LayoutRes;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import java.util.List;/** * 列表單項(xiàng)布局與數(shù)據(jù)綁定 * Created by luokanghui on 2017/5/24. */public abstract class ItemViewAdapter<E>{ /** * 返回列表單項(xiàng)View，如果View由資源layout加載而來，直接重寫{@link #onGetLayoutId()}即可 * @param parent 父view，一般為RecyclerView * @return 列表單項(xiàng)View */ public View onCreateView(ViewGroup parent){ return LayoutInflater.from(parent.getContext()).inflate(onGetLayoutId() , parent, false); } /** * 當(dāng)RecyclerViewHolder創(chuàng)建成功后調(diào)用，只會(huì)調(diào)用一次 * @param viewHolder 單項(xiàng)view集合 */ public void onCreate(RecyclerViewHolder viewHolder){ } /** * 返回單項(xiàng)布局的資源id，如果重寫了{(lán)@link #onCreateView(ViewGroup)}，則此方法可能失效 * @return 單項(xiàng)布局layout id */ @LayoutRes protected abstract int onGetLayoutId(); /** * 把數(shù)據(jù)與view進(jìn)行綁定，滑動(dòng)時(shí)都會(huì)調(diào)用 * @param viewHolder 單項(xiàng)view集合 * @param data 具體數(shù)據(jù) * @param position 在列表中的位置 */ public abstract void bindData(RecyclerViewHolder viewHolder, E data, int position); /** * 局部更新時(shí)調(diào)用 * @param viewHolder 單項(xiàng)view集合 * @param data 具體數(shù)據(jù) * @param position 在列表中的位置 * @param payloads 局部更新標(biāo)志，不會(huì)為空（isEmpty()==false) */ public void bindData(RecyclerViewHolder viewHolder, E data, int position, List<Object> payloads){ }}以上就是本文的全部內(nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持武林網(wǎng)。
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