Android官方下拉刷新控件SwipeRefreshLayout+ListView 介绍

来源：互联网发布：印度入侵中国边界知乎编辑：程序博客网时间：2024/05/19 17:07

一、Activity代码，详细的注释看代码

package git.greetty.com.swiperefresh;import java.util.ArrayList;import java.util.Arrays;import java.util.List;import android.app.Activity;import android.graphics.Color;import android.os.Bundle;import android.os.Handler;import android.support.v4.widget.SwipeRefreshLayout;import android.util.Log;import android.util.TypedValue;import android.widget.ArrayAdapter;import android.widget.Button;import android.widget.ListView;/**  * description: SwipeRefreshLayout练习 * * author: Greetty *  * date: 2016/12/23 10:11  *  * update: 2016/12/23 *  * version: v1.0*/public class MainActivity extends Activity implements SwipeRefreshLayout.OnRefreshListener {    private static final int REFRESH_COMPLETE = 0X110;    private SwipeRefreshLayout mSwipeLayout;    private ListView mListView;    private ArrayAdapter<String> mAdapter;    private List<String> mDatas = new ArrayList<String>(Arrays.asList("Android", "Java", "C++", "C#", "Json",            "HTML5"));    private Handler mHandler = new Handler() {        public void handleMessage(android.os.Message msg) {            switch (msg.what) {                case REFRESH_COMPLETE:                    mDatas.addAll(Arrays.asList("PHP", "nodeJs", "oracle"));                    mAdapter.notifyDataSetChanged();                    //设置SwipeRefreshLayout当前是否处于刷新状态，一般是在请求数据的时候设置为true，                    // 在数据被加载到View中后，设置为false                    mSwipeLayout.setRefreshing(false);                    break;            }        }    };    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mListView = (ListView) findViewById(R.id.id_listview);        mSwipeLayout = (SwipeRefreshLayout) findViewById(R.id.id_swipe_ly);        //设置下拉监听，当用户下拉刷新的时候会去执行回调        mSwipeLayout.setOnRefreshListener(MainActivity.this);        //设置刷新进度条的颜色，最多可以设置四种        mSwipeLayout.setColorSchemeColors(Color.BLUE, Color.GRAY,                Color.GREEN, Color.RED);        //设置进度条大小DEFAULT、DEFAULT两种可选择        mSwipeLayout.setSize(SwipeRefreshLayout.DEFAULT);        // 设置手指在屏幕下拉多少距离会触发下拉刷新，没有设置就为默认值//        mSwipeLayout.setDistanceToTriggerSync(400);        // 这句话是为了，第一次进入页面的时候显示加载进度条，调整进度条距离屏幕顶部的距离//        mSwipeLayout.setProgressViewOffset(false, 0, (int) TypedValue//                .applyDimension(TypedValue.COMPLEX_UNIT_DIP, 24, getResources()//                        .getDisplayMetrics()));        mAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, mDatas);        mListView.setAdapter(mAdapter);    }    @Override    public void onRefresh() {        Log.e("onRefresh", "刷新啦");        mHandler.sendEmptyMessageDelayed(REFRESH_COMPLETE, 2000);    }}

二、布局文件代码

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:orientation="vertical"    android:layout_height="match_parent" >    <android.support.v4.widget.SwipeRefreshLayout        android:id="@+id/id_swipe_ly"        android:layout_width="match_parent"        android:layout_height="match_parent" >        <ListView            android:id="@+id/id_listview"            android:layout_width="match_parent"            android:layout_height="match_parent" >        </ListView>    </android.support.v4.widget.SwipeRefreshLayout></LinearLayout>

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