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SwipeRefreshLayout的基本使用

簡介

SwipRefreshLayout是谷歌前一段時間推出的一款下拉刷新控件。

常用方法

方法	解釋
setColorSchemeResources(int…colorReslds)	設置下拉進度條的顏色主題，參數可變，并且是資源id，最多設置四種不同的顏色。
setProgressBackgroundSchemeResource(int coloRes)	設置下拉進度條的背景顏色,默認白色。
isRefreshing()	判斷當前的狀態是否是刷新狀態。
setOnRefreshListener(SwipeRefreshLayout.OnRefreshListener listener)	設置監聽，需要重寫onRefresh()方法，頂部下拉時會調用這個方法，在里面實現請求數據的邏輯，設置下拉進度條消失等等。
setRefreshing(boolean refreshing)	設置刷新狀態，true表示正在刷新，false表示取消刷新。

使用

1.首先在應用或模塊的 build.gradle 文件中添加所需工件的依賴項：

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

2.在xml文件里面添加相關代碼

<?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.添加布局代碼

<?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)，可以改變下拉刷新時的顏色

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),設置下拉進度的背景顏色

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)設置刷新狀態，false代表停止執行

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，再加上幾個item，完整的代碼如下

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);
//創建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功能介紹
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>

可能會遇到的錯誤

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

解決：android.support.v4.widget.SwipeRefreshLayout改為androidx.swiperefreshlayout.widget.SwipeRefreshLayout

參考

參考一
參考二

作者：胡恒娟
原文鏈接：https://blog.csdn.net/hhj98/article/details/106679237

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