作者:bcz8936810 | 来源:互联网 | 2023-06-30 12:53
下拉刷新
下载地址http://github.com/chrisbanes/Android-pullToRefresh
//下拉刷新下载的源码
//新建项目引用
1.PullToRefreshListFragment------>添加------library库
(对着项目右键----->Properties----->选android)
2.PullToRefreshViewPager------也添加------library库
3.LauncherActivity---------------添加3个库
//新建项目-----UsingListView------也添加3个库
复制libs包写的android-support-v4.jar包分别拷入 其他的4个库包中(覆盖到原来的)
//activity_main.xml
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/container"
android:layout_
android:layout_
android:orientation="vertical"
tools:cOntext=".MainActivity" >
android:id="@+id/mylv"
android:layout_
android:layout_
>
//MainActivity---主程序
package com.jikexueyuan.usinglistview;
import java.util.ArrayList;
import java.util.List;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.Menu;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener;
import com.handmark.pulltorefresh.library.PullToRefreshListView;
public class MainActivity extends Activity {
private PullToRefreshListView lv;
private ArrayAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lv=(PullToRefreshListView) findViewById(R.id.mylv);
List arr=new ArrayList();
arr.add("jikexueyuan");
arr.add("eoe");
adapter=new ArrayAdapter(this,android.R.layout.simple_list_item_1,arr);
lv.setAdapter(adapter);
lv.setOnRefreshListener(new OnRefreshListener() {
@Override
public void onRefresh(PullToRefreshBase refreshView) {
//new AsyncTask()-->Void(V要大写)
new AsyncTask() {
protected Void doInBackground(Void... params) {
try {
Thread.sleep(3000);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
//在这里执行主线程的操作
@SuppressLint("NewApi")
protected void onPostExecute(Void result) {
//添加数据
adapter.addAll("Hello","大家好");
//通知listview,下载数据
lv.onRefreshComplete();
};
}.execute();//执行
}
});
}
@Override
public 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;
}
}
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