滑动刷新android activity androidactivity滑动刷新|Android

本文概述

滑动以刷新Android活动示例

在本教程中，我们将在Android中创建刷卡刷新功能。为此，应使用SwipeRefreshLayout小部件。
SwipeRefreshLayout的实例添加了OnRefreshListener方法，并实现了将在刷新时加载的代码逻辑。当用户滑动时，垂直滑动会显示一个独特的进度条。进度条显示进度动画时调用setRefreshing（true）或调用setRefreshing（false）取消。
滑动以刷新Android活动示例在activity_main.xml文件中，实现SwipeRefreshLayout小部件。
activity_main.xml

< ?xml version="1.0" encoding="utf-8"?> < android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/refreshLayout" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="example.srcmini.com.swiperefreshlayout.MainActivity">< RelativeLayout android:layout_width="wrap_content" android:layout_height="wrap_content">< TextView android:id="@+id/textView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_centerHorizontal="true" android:layout_marginTop="229dp" android:text="Hello World!" android:textSize="18dp" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" /> < /RelativeLayout> < /android.support.v4.widget.SwipeRefreshLayout>

创建一个活动MainActivity.java并添加以下代码。在此类中，我们将检查滑动的onRefresh（）网络连接。
MainActivity.java

package example.srcmini.com.swiperefreshlayout; import android.content.Context; import android.graphics.Color; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.support.v4.widget.SwipeRefreshLayout; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.TextView; public class MainActivity extends AppCompatActivity { SwipeRefreshLayout swipeRefreshLayout; TextView textView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); swipeRefreshLayout = findViewById(R.id.refreshLayout); textView = findViewById(R.id.textView); swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() { @Override public void onRefresh() { swipeRefreshLayout.setRefreshing(false); //your code on swipe refresh //we are checking networking connectivity boolean connection=isNetworkAvailable(); if(connection){ textView.setText("internet connect"); textView.setTextColor(Color.GREEN); } else{ textView.setText("not connected"); textView.setTextColor(Color.RED); }} }); swipeRefreshLayout.setColorSchemeColors(Color.YELLOW); } public boolean isNetworkAvailable(){ConnectivityManager connectivityManager=(ConnectivityManager) this.getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo networkInfo=connectivityManager.getActiveNetworkInfo(); return networkInfo !=null; } }

所需权限
【滑动刷新android activity】在AndroidMenifest.xml文件中添加uses-permission。下面给出的权限用于访问网络连接。