Android Studio 3.4.1 下拉刷新 SwipRefreshLayout

导入依赖

implementation 'androidx.swiperefreshlayout:swiperefreshlayout:latest.release'

主布局文件

SwipRefreshLayout嵌套ListView

<?xml version="1.0" encoding="utf-8"?>

ListView显示布局文件就一个TextView

<?xml version="1.0" encoding="utf-8"?>

MainActivity

package com.dzqc.card;import androidx.appcompat.app.AppCompatActivity;import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;import android.os.Bundle;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ListView;import android.widget.TextView;import java.util.ArrayList;import java.util.List;import java.util.Random;public class MainActivity extends AppCompatActivity {    private SwipeRefreshLayout swip;    private ListView lv;    String[] fruits = {"香蕉", "苹果", "桔子", "西瓜", "橙子", "葡萄"};    List frutisLists = new ArrayList<>();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        swip = findViewById(R.id.swip);        lv = findViewById(R.id.lv);        //三种颜色切换        swip.setColorSchemeResources(R.color.blue, R.color.red, R.color.black);        //让刷新停止        swip.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {            @Override            public void onRefresh() {                //获取数据  停止刷新                refreshFruits();            }        });      /*  //自动刷新        swip.measure(0,0);        swip.setRefreshing(true);*/    }    private void refreshFruits() {        new Thread() {            @Override            public void run() {                try {                    Thread.sleep(2000);                } catch (Exception e) {                    e.printStackTrace();                }                //更新UI                runOnUiThread(new Runnable() {                    @Override                    public void run() {                        initFrutis();                        //获取数据                        lv.setAdapter(new MyAdapter());                        //刷新消失                        swip.setRefreshing(false);                    }                });            }        }.start();    }    private void initFrutis() {        //加载数据        for (int i = 0; i < fruits.length; i++) {            Random random = new Random();            int index = random.nextInt(fruits.length);            Fruits f = new Fruits();            f.setName(fruits[index]);            frutisLists.add(f);        }    }    public class MyAdapter extends BaseAdapter {        @Override        public int getCount() {            return frutisLists.size();        }        @Override        public Object getItem(int i) {            return null;        }        @Override        public long getItemId(int i) {            return 0;        }        @Override        public View getView(int i, View view, ViewGroup viewGroup) {            View v;            if (view == null) {                v = View.inflate(getApplicationContext(), R.layout.item, null);            } else {                v = view;            }            TextView tv_c = v.findViewById(R.id.tv_c);            Fruits fruits = frutisLists.get(i);            tv_c.setText(fruits.getName());            return v;        }    }}

效果图

更多相关文章

随机推荐