Android中SwipeRefreshLayout的使用

2019-11-09 17:49:15

字体：大中小

来源：转载

供稿：网友

SwipeRefreshLayout是Android自带的实现下拉刷新的控件。

下面我们重点看一下SwipeRefreshLayout的使用吧。

activity_main.xml文件：

[html] view plain copy<?xml version="1.0" encoding="utf-8"?> <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.support.v4.widget.SwipeRefreshLayout android:id="@+id/swiPRefresh" android:layout_width="match_parent" android:layout_height="match_parent" android:padding="10dp"> <GridView android:id="@+id/gridView" android:layout_width="match_parent" android:layout_height="match_parent" android:numColumns="3"></GridView> </android.support.v4.widget.SwipeRefreshLayout> </RelativeLayout> 在MainActivity中的具体实现：

[java] view plain copypackage com.example.administrator.swiperefreshdemo; import android.graphics.Color; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.support.v4.widget.SwipeRefreshLayout; import android.support.v7.app.AppCompatActivity; import android.widget.ArrayAdapter; import android.widget.GridView; import java.util.ArrayList; import java.util.List; public class MainActivity extends AppCompatActivity implements SwipeRefreshLayout.OnRefreshListener { private SwipeRefreshLayout swipeRefreshLayout; private ArrayAdapter<String> adapter; private int index = 1; private List<String> list = new ArrayList<>(); private GridView gridView; private Handler handler = new Handler() { @Override public void handleMessage(Message msg) { super.handleMessage(msg); } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); } private void initView() { swipeRefreshLayout = (android.support.v4.widget.SwipeRefreshLayout) findViewById(R.id.swipRefresh); gridView = (GridView) findViewById(R.id.gridView); for (int i = 0; i < 20; i++) { list.add("你好"); } adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, list); gridView.setAdapter(adapter); //改变加载显示的颜色 swipeRefreshLayout.setColorSchemeColors(Color.RED, Color.RED); //设置背景颜色 swipeRefreshLayout.setBackgroundColor(Color.YELLOW); //设置初始时的大小 swipeRefreshLayout.setSize(SwipeRefreshLayout.LARGE); //设置监听 swipeRefreshLayout.setOnRefreshListener(this); //设置向下拉多少出现刷新 swipeRefreshLayout.setDistanceToTriggerSync(100); //设置刷新出现的位置 swipeRefreshLayout.setProgressViewEndTarget(false, 200); } @Override public void onRefresh() { //设置每次刷新时需要更新的数据 list.clear(); index++; for (int i = 0; i < 20; i++) { list.add("我好,哈哈" + index); } new Thread(new Runnable() { @Override public void run() { try { //然刷新控件停留两秒后消失 Thread.sleep(2000); handler.post(new Runnable() {//在主线程执行 @Override public void run() { //更新数据 adapter.notifyDataSetChanged(); //停止刷新 swipeRefreshLayout.setRefreshing(false); } }); } catch (InterruptedException e) { e.printStackTrace(); } } }).start(); } } 运行结果：