cwac-endless adapter 使用攻略 EndlessAdapter 怎么使用

最近做一个项目需要用到ListView加载上千条数据,当然结果是很卡! 怎么解决呢?google一下?

找到了一个开源项目http://commonsware.com/cwac

但是怎么使用呢?网上找了一堆demo没说清楚!经过本人反复实验 终于弄懂了!如果有不合理或者更好的建议请写下来大家一起共同解决!

好了废话不多说 开始!

demo和jar地址http://download.csdn.net/detail/zabio/6979685

1.准备好项目所需要的jar包 CWAC-AdapterWrapper.jar 和CWAC-EndlessAdapter.jar

2.导入项目这个步骤就不再说了

3.看代码 简单粗糙的写了下

package com.hy.lazylistview;

import java.util.ArrayList;import java.util.List;import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.os.SystemClock;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.view.animation.Animation;import android.view.animation.RotateAnimation;import android.widget.BaseAdapter;import android.widget.ListView;import android.widget.TextView;import com.commonsware.cwac.endless.EndlessAdapter;public class MainActivity extends Activity {private ListView lv;private List list = new ArrayList();@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.activity_main);lv = (ListView) findViewById(R.id.lv);//初始化第一次显示的数据for (int j = 0; j < 100; j++) {list.add(j + "startData");}lv.setAdapter(new MyAdapter());}//这个是我们需要的可以无限往下滑进行列表数据加载的控件class MyAdapter extends EndlessAdapter {//加载时的动画private RotateAnimation rotate = null;private View pendingView = null;//构造的时候 要super一下MyAdapter() {//里面这个很熟悉 常用的baseAdaptersuper(new MyBaseAdapter());rotate = new RotateAnimation(0f, 360f, Animation.RELATIVE_TO_SELF,0.5f, Animation.RELATIVE_TO_SELF, 0.5f);rotate.setDuration(600);rotate.setRepeatMode(Animation.RESTART);rotate.setRepeatCount(Animation.INFINITE);}//显示加载时的view@Overrideprotected View getPendingView(ViewGroup parent) {View row = LayoutInflater.from(parent.getContext()).inflate(R.layout.row, null);pendingView = row.findViewById(android.R.id.text1);pendingView.setVisibility(View.GONE);pendingView = row.findViewById(R.id.throbber);pendingView.setVisibility(View.VISIBLE);startProgressAnimation();return (row);}//设置加载的时间@Overrideprotected boolean cacheInBackground() {SystemClock.sleep(10000); //设置限制总数据大小  return (getWrappedAdapter().getCount() < 1000);}//往list里面添加数据@Overrideprotected void appendCachedData() {if (getWrappedAdapter().getCount() < 1000) {for (int i = 0; i <100; i++) {list.add(i+"addData");}}}void startProgressAnimation() {if (pendingView != null) {pendingView.startAnimation(rotate);}}}//这是常见的控件不解释了class MyBaseAdapter extends BaseAdapter {@Overridepublic int getCount() {// TODO Auto-generated method stubreturn list.size();}@Overridepublic Object getItem(int position) {// TODO Auto-generated method stubreturn list.get(position);}@Overridepublic long getItemId(int position) {// TODO Auto-generated method stubreturn position;}class Holder {TextView t, t2;}@Overridepublic View getView(int position, View view, ViewGroup parent) {Holder h;if (view == null) {h=new Holder();view = View.inflate(MainActivity.this, R.layout.item, null);h.t = (TextView) view.findViewById(R.id.tv);h.t2 = (TextView) view.findViewById(R.id.tv2);view.setTag(h);} else {h = (Holder) view.getTag();}h.t.setText("position" + position);h.t2.setText(list.get(position).toString());return view ;}}}

--------------------资源文件--------------------

activity_main<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity" >    <ListView        android:id="@+id/lv"        android:layout_width="fill_parent"        android:layout_height="fill_parent"        android:layout_alignParentLeft="true"        android:cacheColorHint="#00000000"        android:fastScrollEnabled="true" /></RelativeLayout>item------------------------------<?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" >    <TextView         android:id="@+id/tv"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:textColor="#0f0"/>    <TextView         android:id="@+id/tv2"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:textColor="#00f"/></LinearLayout>row-----------------------------<?xml version="1.0" encoding="utf-8"?><FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="wrap_content" >    <TextView        android:id="@android:id/text1"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:gravity="center_vertical"        android:minHeight="?android:attr/listPreferredItemHeight"        android:paddingLeft="6dip"        android:textAppearance="?android:attr/textAppearanceLarge" />    <ImageView        android:id="@+id/throbber"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@drawable/ic_popup_sync_1"        android:visibility="gone" />        <TextView        android:id="@+id/tv"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:gravity="center_vertical"        android:minHeight="?android:attr/listPreferredItemHeight"        android:paddingLeft="6dip"         />    </FrameLayout>