Android 循环ListView

Android  循环ListView    之前做个iOS下的，实现起来比较复杂，后来在网上找了一个例子，其实现起来比较容易，思路很好，这个我做个整理

代码下载：http://pan.baidu.com/s/1bnEKxd1

这个类就是个ListView的Adapter没什么特别的。

ListAdapter.java

package com.pactera.infinitescrollview;import java.util.List;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.TextView;public class ListAdapter extends BaseAdapter{private List<String> list;private LayoutInflater mInflater;public ListAdapter (Context context,List<String> list) {this.list  = list;this.mInflater = LayoutInflater.from(context);}@Overridepublic int getCount() {// TODO Auto-generated method stubif (list != null) {//这个内容要是显示内容的3倍return list.size() * 3;}return 0;}@Overridepublic Object getItem(int arg0) {// TODO Auto-generated method stubreturn list.get(arg0 % list.size());}@Overridepublic long getItemId(int arg0) {// TODO Auto-generated method stubreturn arg0 % list.size();}@Overridepublic View getView(int postition, View converView, ViewGroup arg2) {// TODO Auto-generated method stubViewHoler viewHoler = null;if (converView == null) {viewHoler = new ViewHoler();converView = mInflater.inflate(R.layout.adapter_list_layout, null);viewHoler.tvText = (TextView)converView.findViewById(R.id.adapter_list_layout_tv);converView.setTag(viewHoler);}else {viewHoler = (ViewHoler)converView.getTag();}viewHoler.tvText.setText(list.get(postition % list.size()));return converView;}static class ViewHoler{TextView tvText;}}

MainActivity.java

package com.pactera.infinitescrollview;import java.util.ArrayList;import java.util.List;import android.os.Bundle;import android.app.Activity;import android.util.Log;import android.view.Menu;import android.widget.AbsListView;import android.widget.ListView;import android.widget.AbsListView.OnScrollListener;public class MainActivity extends Activity implements OnScrollListener {private ListView listView;private List<String> list;private ListAdapter adapter;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);listView = (ListView) findViewById(R.id.listView1);list = getList();adapter = new ListAdapter(this, list);listView.setAdapter(adapter);listView.setOnScrollListener(this);listView.setSelection(list.size());}public List<String> getList() {List<String> list = new ArrayList<String>();for (int i = 0; i < 10; i++) {list.add(String.valueOf(i));}return list;}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}@Overridepublic void onScroll(AbsListView view, int firstVisibleItem,int visibleItemCount, int totalItemCount) {// TODO Auto-generated method stubLog.d("ff", ""+ firstVisibleItem);     if (firstVisibleItem <= 2) {listView.setSelection(list.size() + 2);}else if (firstVisibleItem + visibleItemCount > adapter.getCount() - 2) {listView.setSelection(firstVisibleItem - list.size());}}@Overridepublic void onScrollStateChanged(AbsListView arg0, int arg1) {// TODO Auto-generated method stub}}

重点在上面的onScroll方法 的if语句

activity_main.xml

<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/listView1"        android:layout_width="match_parent"        android:layout_height="150dp"        android:layout_marginLeft="26dp" >    </ListView></RelativeLayout>

adapter_list_layout.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" >      <TextView         android:id="@+id/adapter_list_layout_tv"        android:layout_width="fill_parent"        android:layout_height="50dp"        android:textSize="40dp"        android:gravity="center"        android:text="11111"        />    </LinearLayout>