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SwipeRefreshLayout的基本使用

简介

SwipRefreshLayout是谷歌前一段时间推出的一款下拉刷新控件。

常用方法

使用

1.首先在应用或模块的 build.gradle 文件中添加所需工件的依赖项：

dependencies {
    implementation "androidx.swiperefreshlayout:swiperefreshlayout:1.0.0"
   
}

2.在xml文件里面添加相关代码

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent">

    <android.support.v4.widget.SwipeRefreshLayout>
        
    </android.support.v4.widget.SwipeRefreshLayout>

</LinearLayout>

3.添加布局代码

<?xml version="1.0" encoding="utf-8"?>
    <android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:id="@+id/swipeLayout">
    <ListView android:id="@+id/aa" android:layout_width="match_parent" android:layout_height="match_parent"/>
    </android.support.v4.widget.SwipeRefreshLayout>

4.setColorSchemeResources(int…colorReslds)，可以改变下拉刷新时的颜色

public class MainActivity extends AppCompatActivity { 
   
    private SwipeRefreshLayout swipeRefreshLayout;
    @SuppressLint("ResourceAsColor")
    @Override
    protected void onCreate(Bundle savedInstanceState) { 
   
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout);
        SwipeRefreshLayout swip_refresh_layout=findViewById(R.id.swipeLayout);
        swip_refresh_layout.setColorSchemeResources(R.color.colorPrimary);
    }

5.setProgressBackgroundSchemeResource(int coloRes),设置下拉进度的背景颜色

public class MainActivity extends AppCompatActivity { 
   
    private SwipeRefreshLayout swipeRefreshLayout;
    @SuppressLint("ResourceAsColor")
    @Override
    protected void onCreate(Bundle savedInstanceState) { 
   
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout);
        SwipeRefreshLayout swip_refresh_layout=findViewById(R.id.swipeLayout);
        swip_refresh_layout.setColorSchemeResources(R.color.colorPrimary);      swip_refresh_layout.setProgressBackgroundColorSchemeColor(R.color.colorPrimaryDark);
    }

6.setRefreshing(boolean refreshing)设置刷新状态，false代表停止执行

swip_refresh_layout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() { 
   
    @Override
    public void onRefresh() { 
   
        new Handler().postDelayed(new Runnable() { 
   
            @Override
            public void run() { 
   
                swip_refresh_layout.setRefreshing(false);
            }
        },2000);
    }
});

7.全部整理好后，再加上几个item，完整的代码如下

package com.example.swiperefreshlayout;
import androidx.appcompat.app.AppCompatActivity;
import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
import android.annotation.SuppressLint;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class MainActivity extends AppCompatActivity { 

private SwipeRefreshLayout swipeRefreshLayout;
private String[] names = new String[]
{ 
"Lion","Tiger","Monkey","Dog","Cat","Elephant"};
@SuppressLint("ResourceAsColor")
@Override
protected void onCreate(Bundle savedInstanceState) { 

super.onCreate(savedInstanceState);
setContentView(R.layout.layout);
//创建list集合
ListView list = findViewById(R.id.aa);
List<Map<String,Object>> listItems =
new ArrayList<>();
for (int i=0;i<names.length;i++)
{ 

Map<String,Object> listItem =new HashMap<>();
listItem.put("names",names[i]);
listItems.add(listItem);
}
SimpleAdapter simpleAdapter=new SimpleAdapter(this,listItems,R.layout.item,
new String[]{ 
"names"}
,new int[]{ 
R.id.names});
list.setAdapter(simpleAdapter);
//SwipeRefreshLayout功能介绍
final SwipeRefreshLayout swip_refresh_layout=findViewById(R.id.swipeLayout);
swip_refresh_layout.setColorSchemeResources(R.color.colorPrimary);
swip_refresh_layout.setProgressBackgroundColorSchemeColor(R.color.colorPrimaryDark);
swip_refresh_layout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() { 

@Override
public void onRefresh() { 

new Handler().postDelayed(new Runnable() { 

@Override
public void run() { 

swip_refresh_layout.setRefreshing(false);
}
},2000);
}
});
}
}

item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent">
<TextView android:id="@+id/names" android:layout_width="match_parent" android:layout_height="70dp" android:paddingLeft="10dp" android:layout_marginTop="5dp" android:textColor="@color/colorPrimaryDark" android:textSize="30dp" />
</LinearLayout>

layout.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.swiperefreshlayout.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:id="@+id/swipeLayout">
<ListView android:id="@+id/aa" android:layout_width="match_parent" android:layout_height="74dp" />
</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

可能会遇到的错误

1.Error inflating class android.support.v4.widget.SwipeRefreshLayout

解决：android.support.v4.widget.SwipeRefreshLayout改为androidx.swiperefreshlayout.widget.SwipeRefreshLayout

参考

参考一
参考二

作者：胡恒娟
原文链接：https://blog.csdn.net/hhj98/article/details/106679237