在App开发中，对于信息的获取与演示，不可能全部将其获取与演示，为了在用户使用中，给予用户以友好、方便的用户体验，以滑动、下拉的效果动态加载数据的要求就会出现。为此，该效果功能就需要应用到所需要的展示页面中。
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="PullToRefresh">
<attr name="mode" format="reference" >
<flag name="pullDownFromTop" value="0x1" />
<flag name="pullUpFromBottom" value="0x2" />
<flag name="both" value="0x3" />
</attr>
</declare-styleable>
</resources>
srings.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">SampleDemo</string>
<string name="action_settings">Settings</string>
<string name="pull_to_refresh_pull_down_label">滑动刷新</string>
<string name="pull_to_refresh_release_label">释放刷新</string>
<string name="pull_to_refresh_refreshing_label">加载中</string>
<string name="pull_to_refresh_tap_label">点击刷新</string>
</resources>第三步：将所需要的图片文件放入相应的文件夹下面，所用的图片文件有：
import java.util.LinkedList;
import com.example.sampledemo.view.PullToRefreshListView;
import android.os.AsyncTask;
import android.widget.BaseAdapter;
public class PullTask extends AsyncTask<Void, Void, String>{
private PullToRefreshListView pullToRefreshListView; //实现下拉刷新与上拉加载的ListView
private int pullState; //记录判断，上拉与下拉动作
private BaseAdapter baseAdapter; //ListView适配器，用于提醒ListView数据已经更新
private LinkedList<String> linkedList;
public PullTask(PullToRefreshListView pullToRefreshListView, int pullState,
BaseAdapter baseAdapter, LinkedList<String> linkedList) {
this.pullToRefreshListView = pullToRefreshListView;
this.pullState = pullState;
this.baseAdapter = baseAdapter;
this.linkedList = linkedList;
}
@Override
protected String doInBackground(Void... params) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
}
return "StringTest";
}
@Override
protected void onPostExecute(String result) {
if(pullState == 1) {//name="pullDownFromTop" value="0x1" 下拉
linkedList.addFirst("顶部数据");
}
if(pullState == 2) {//name="pullUpFromBottom" value="0x2" 上拉
linkedList.addLast("底部数据");
}
baseAdapter.notifyDataSetChanged();
pullToRefreshListView.onRefreshComplete();
super.onPostExecute(result);
}
}import java.util.LinkedList;
import com.example.sampledemo.R;
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 PullAdapter extends BaseAdapter {
private LinkedList<String> linkedList;
private LayoutInflater mInflater;
public PullAdapter(LinkedList<String> linkedList, Context context) {
mInflater = LayoutInflater.from(context);
this.linkedList = linkedList;
}
@Override
public int getCount() {
return linkedList.size();
}
@Override
public Object getItem(int position) {
return linkedList.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder=null;
if (convertView == null) {
holder = new ViewHolder();
convertView = mInflater.inflate(R.layout.layout_main_listitem, null);
holder.textView = (TextView) convertView.findViewById(R.id.textView);
convertView.setTag(holder);
}else {
holder = (ViewHolder) convertView.getTag();
}
if(linkedList.size()>0){
final String dataStr = linkedList.get(position);
holder.textView.setText(dataStr);
}
return convertView;
}
private static class ViewHolder {
TextView textView; //数据显示区域
}
}<?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:background="#FFFFFF"
android:orientation="vertical" >
<TextView
android:id="@+id/textView"
android:textColor="#99CC66"
android:textSize="18dp"
android:layout_marginTop="4dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="left" />
</LinearLayout><?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:paddingTop="10dp"
android:paddingBottom="10dip">
<TextView
android:id="@+id/pull_to_refresh_text"
android:text="@string/pull_to_refresh_pull_down_label"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textStyle="bold"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true" />
<ProgressBar
android:id="@+id/pull_to_refresh_progress"
android:indeterminate="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="30dip"
android:layout_marginRight="20dip"
android:visibility="gone"
android:layout_centerVertical="true"
style="?android:attr/progressBarStyleSmall" />
<ImageView
android:id="@+id/pull_to_refresh_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="30dip"
android:layout_marginRight="20dip"
android:layout_centerVertical="true" />
</RelativeLayout><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:cp="http://schemas.android.com/apk/res/com.example.sampledemo"
android:layout_width="match_parent"
android:background="#FFFFFF"
android:layout_height="match_parent">
<com.example.sampledemo.view.PullToRefreshListView
android:id="@+id/pullrefresh"
android:background="#FFFFFF"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:divider="@android:color/black"
android:dividerHeight="0.1dip"
android:cacheColorHint="#00000000"
cp:mode="both">
</com.example.sampledemo.view.PullToRefreshListView>
</RelativeLayout>import java.util.Arrays;
import java.util.LinkedList;
import com.example.sampledemo.view.PullToRefreshBase.OnRefreshListener;
import com.example.sampledemo.view.PullToRefreshListView;
import com.example.sampledemo.view.adapter.PullAdapter;
import com.example.sampledemo.view.task.PullTask;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.app.Activity;
/**
* @ClassName MainActivity.java
* @Author MaHaochen
* @Date 2014-4-30 15:56:47
*/
public class MainActivity extends Activity {
private LinkedList<String> mListItems;
private PullToRefreshListView mPullRefreshListView;
private ArrayAdapter<String> mAdapter;
private ListView mListView;
private PullAdapter pullAdapter;
private String[] mStrings = { "初始数据01","初始数据02","初始数据03","初始数据04","初始数据05"
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initViews();
}
private void initViews() {
mPullRefreshListView = (PullToRefreshListView) findViewById(R.id.pullrefresh);
mPullRefreshListView.setOnRefreshListener(mOnrefreshListener);
mListView = mPullRefreshListView.getRefreshableView();
mListItems = new LinkedList<String>();
mListItems.addAll(Arrays.asList(mStrings));
pullAdapter = new PullAdapter(mListItems, MainActivity.this);
mListView.setAdapter(pullAdapter);
}
OnRefreshListener mOnrefreshListener = new OnRefreshListener() {
public void onRefresh() {
PullTask pullTask = new PullTask(mPullRefreshListView,
mPullRefreshListView.getRefreshType(), pullAdapter, mListItems);
pullTask.execute();
}
};
}Android 下拉刷新上拉加载效果功能,布布扣,bubuko.com
原文：http://blog.csdn.net/mahoking/article/details/27327825