如果你项目一直用系统给你封装的BaseAdapter的话，那么我只想说，你不累么？
代码繁多还要写数据缓存，还不如自己动手写一个模板吧，这样后面项目就可以直接套用了，编写和执行效率大大提升啊。
BaseAdapter.java
monospace !important; direction: ltr !important; display: block !important; background: none !important;">001
class="keyword" style="border: 0px !important; padding: 0px !important; margin: 0px !important; float: none !important; vertical-align: baseline !important; height: auto !important; width: auto !important; line-height: 1.1em !important; font-family: Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important; font-weight: bold !important; direction: ltr !important; display: inline !important; color: #006699 !important; background: none !important;">import java.util.ArrayList;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.Comparator;
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import java.util.List;
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?
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import android.content.Context;
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import android.content.res.Resources;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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/**
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?* 实现这个适配器模板会少很多代码
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?* @author leehom
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?* @param <T>
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?*/
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public abstract class BaseAdapter<T> extends android.widget.BaseAdapter {
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?
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????protected List<T> list;
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????protected Context context;
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????protected LayoutInflater inflater;
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????private int layoutID;
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?
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????public BaseAdapter(Context context, T[] ts, int layoutID) {
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????????super();
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????????this.context = context;
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????????this.list = new ArrayList<T>();
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????????this.layoutID = layoutID;
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????????Collections.addAll(list, ts);
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????????this.inflater = LayoutInflater.from(context);
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????}
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?
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????public BaseAdapter(Context context, List<T> list, int layoutID) {
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????????super();
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????????this.layoutID = layoutID;
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????????this.context = context;
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????????this.list = new ArrayList<T>();
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????????this.list.addAll(list);
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????????this.inflater = LayoutInflater.from(context);
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????}
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?
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????public Resources getResources() {
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????????return context.getResources();
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????}
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?
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????public synchronized void add(T object) {
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????????list.add(object);
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????}
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?
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????public synchronized void addAll(Collection<? extends T> collection) {
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????????list.addAll(collection);
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????}
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?
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????public synchronized void remove(T object) {
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????????list.remove(object);
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????}
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?
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????public synchronized void insert(T object, int index) {
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????????list.add(index, object);
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????}
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????public synchronized void clear() {
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????????list.clear();
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????}
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?
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????public synchronized void sort(Comparator<? super T> comparator) {
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????????Collections.sort(list, comparator);
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????}
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????@Override
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????public T getItem(int position) {
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????????// TODO Auto-generated method stub
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????????return list.get(position);
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????}
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?
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????@Override
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????public int getCount() {
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????????// TODO Auto-generated method stub
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????????return list.size();
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????}
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?
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????@Override
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????public long getItemId(int position) {
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????????// TODO Auto-generated method stub
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????????return position;
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????}
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?
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????@Override
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????public View getView(int position, View convertView, ViewGroup parent) {
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????????// TODO Auto-generated method stub
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????????ViewHolder holder = null;
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????????if (convertView == null) {
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????????????convertView = inflater.inflate(layoutID, null);
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????????????holder = new ViewHolder(convertView);
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????????????initView(holder);
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????????????convertView.setTag(holder);
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????????} else {
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????????????holder = (ViewHolder) convertView.getTag();
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????????}
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????????setViewValue(holder, position);
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????????return convertView;
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????}
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?
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????public List<T> getList() {
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????????return list;
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????}
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?????
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????/**
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?????* 向ViewHolder类里面添加View
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?????* @param holder
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?????*/
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????public abstract void initView(ViewHolder holder);
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?
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????/**
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?????* 从ViewHolder获取对应ID的View设置其值
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?????* @param holder
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?????* @param t 数据对象
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?????*/
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????public abstract void setViewValue(ViewHolder holder, int position);
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?
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}
用的时候也是继承它，然后只需要初始化ID和设置Value就行了。例：
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import java.lang.reflect.Field;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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import java.util.ArrayList;
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?
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import android.annotation.SuppressLint;
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import android.content.Context;
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?
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import com.fenjin.app.humiture.R;
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import com.fenjin.app.item.DefaultItem;
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?
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@SuppressLint("DefaultLocale")
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public class DefaultAdapter extends BaseAdapter<DefaultItem> {
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?
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????public DefaultAdapter(Context context, Object object) {
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????????super(context, new ArrayList<DefaultItem>(),
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????????????????R.layout.default_list_item_layout);
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????????// TODO Auto-generated constructor stub
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????????try {
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????????????Field[] fields = object.getClass().getDeclaredFields();
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????????????for (Field field : fields) {
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????????????????String lable = field.getName();
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????????????????String firstWord = lable.substring(0, 1).toUpperCase();
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????????????????StringBuffer buffer = new StringBuffer("get");
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????????????????buffer.append(firstWord);
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????????????????buffer.append(lable.substring(1));
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????????????????String name = buffer.toString();
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????????????????Method method = object.getClass().getDeclaredMethod(name);
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????????????????String value = method.invoke(object).toString();
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????????????????DefaultItem item = new DefaultItem(lable, value);
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????????????????add(item);
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????????????}
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????????} catch (IllegalArgumentException e) {
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????????????// TODO Auto-generated catch block
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????????????e.printStackTrace();
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????????} catch (NoSuchMethodException e) {
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????????????// TODO Auto-generated catch block
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????????????e.printStackTrace();
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????????} catch (IllegalAccessException e) {
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????????????// TODO Auto-generated catch block
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????????????e.printStackTrace();
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????????} catch (InvocationTargetException e) {
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????????????// TODO Auto-generated catch block
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????????????e.printStackTrace();
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????????}
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????}
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?
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????@Override
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????public void initView(ViewHolder holder) {
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????????// TODO Auto-generated method stub
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????????holder.addView(R.id.default_lable);
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????????holder.addView(R.id.default_value);
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????}
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?
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????@Override
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????public void setViewValue(ViewHolder holder, int position) {
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????????// TODO Auto-generated method stub
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????????DefaultItem item = getItem(position);
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????????holder.getTextView(R.id.default_lable).setText(item.getLable());
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????????holder.getTextView(R.id.default_value).setText(item.getValue());
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????}
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?
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????@Override
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????public boolean isEnabled(int position) {
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????????// TODO Auto-generated method stub
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????????return false;
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????}
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?
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}
javabean代码
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public class DefaultItem {
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?
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????String lable;
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????String value;
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?
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????public DefaultItem(String lable, String value) {
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????????super();
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????????this.lable = lable;
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????????this.value = value;
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????}
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?
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????public String getLable() {
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????????return lable;
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????}
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?
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????public void setLable(String lable) {
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????????this.lable = lable;
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????}
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????public String getValue() {
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????????return value;
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????}
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????public void setValue(String value) {
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????????this.value = value;
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????}
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?
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}
xml代码
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<?xml version="1.0" encoding="utf-8"?>
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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
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????android:layout_width="match_parent"
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????android:layout_height="match_parent"
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????android:orientation="horizontal"
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????android:padding="@dimen/margin_10" >
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?
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????<TextView
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????????android:id="@+id/default_lable"
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????????android:layout_width="wrap_content"
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????????android:layout_height="wrap_content" />
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?
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????<TextView
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????????android:layout_width="wrap_content"
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????????android:layout_height="wrap_content"
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????????android:text=":" />
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????<TextView
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????????android:id="@+id/default_value"
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????????android:layout_width="wrap_content"
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????????android:layout_height="wrap_content" />
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?
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</LinearLayout>
每次实现的代码仅仅这么点
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@Override
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public void initView(ViewHolder holder) {
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????// TODO Auto-generated method stub
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????holder.addView(R.id.default_lable);
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????holder.addView(R.id.default_value);
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}
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?
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@Override
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public void setViewValue(ViewHolder holder, int position) {
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????// TODO Auto-generated method stub
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????DefaultItem item = getItem(position);
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????holder.getTextView(R.id.default_lable).setText(item.getLable());
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????holder.getTextView(R.id.default_value).setText(item.getValue());
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}
是不是非常不错呢？
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