Android SimpleAdapter使用详解

HolderAdapter背景

Android的AdapterView用的比较多，ListView，GridView，Spinner等，原生的BaseAdapter对ViewHolder没有支持，每次都要，定义内部类，inflater根布局，对item内部view设置clicklistener并转发到adapter的调用者等。写的次数多了感觉很繁琐，于是写了个简单的封装，简化Adapter的编写，

仓库连接http://git.oschina.net/phodev/SimpleAdapter.

主要文件介绍

1，CommonAdapter.java从BaseAdapter继承，添加了常用的函数，通过泛型约定了List数据源，代替子类实现getCount功能,添加bindClick实现Adapter的OnItemClickListener。

2，BaseViewHolder.java和HolderAdapter结合，实现类似Activity的view初始化方方式onCreate->setContentView->findViewById。

3，HolderAdapter.java从CommonAdapter继承，主要用来驱动BaseViewHolder工作。

使用方法

1,Adapter定义

public class SampleHolderAdapter extends HolderAdapter<Object> { //定义Item内部的点击事件，如果不需要可以不定义 public static final int CLICK_ACTION_ADD = 1; public static final int CLICK_ACTION_UPDATE = 2; public static final int CLICK_ACTION_DELETE = 3; //构造函数配置数据源（可选，或者之后通过setData更新） public SampleHolderAdapter(List<Object> data) { super(data); } @Override public BaseViewHolder<?> createViewHolder(int position) { //创建期望的 ViewHolder return new ViewHolder(); } class ViewHolder extends BaseViewHolder<Object> { Button btn1, btn2, btn3; @Override protected void onCreate(Context context, ViewGroup parent) { //ViewHolder创建后onCreate会被执行1次 setContentView(R.layout.item_test);//setContent支持View或者layout id btn1 = (Button) findViewById(R.id.btn1);//findViewById btn2 = (Button) findViewById(R.id.btn2); btn3 = (Button) findViewById(R.id.btn3); } @Override protected void onDataChanged(int position, Object data) { //adapter getView的时候onDataChanged会被执行一次 btn1.setText("add " + position); btn2.setText("update " + position); btn3.setText("delete " + position); // bindClick(btn1, position, CLICK_ACTION_ADD);//绑定ItemClick，每次都需bind bindClick(btn2, position, CLICK_ACTION_UPDATE); bindClick(btn3, position, CLICK_ACTION_DELETE); } }}

2,Adapter使用

//数据源 private final ArrayList<Object> mData = new ArrayList<>(); //创建Adapter并绑定数据源 private final SampleHolderAdapter mAdapter = new SampleHolderAdapter(mData); @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mListView = (ListView) findViewById(R.id.listview); //绑定Adapter mListView.setAdapter(mAdapter); //设置click listener（由于CommonAdapter支持，并通过bindClick声明） mAdapter.setOnItemClickListener(onItemClickListener); } //ClickListener实现 private OnItemClickListener onItemClickListener = new OnItemClickListener() { @Override public void onItemClick(CommonAdapter<?> adapter, View v, int position, int action) { switch (action) {//action就是我们SampleHolderAdapte中定义并且bindClick的value case SampleHolderAdapter.CLICK_ACTION_ADD: toast(getContext(), position + " add click"); break; case SampleHolderAdapter.CLICK_ACTION_UPDATE: toast(getContext(),position + " update click"); break; case SampleHolderAdapter.CLICK_ACTION_DELETE: toast(getContext(), position + " delete click"); break; } } };

到此定义和使用的代码完毕。

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