Android中SwipeRefreshLayout的使用

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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：

<?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：

package 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：

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