学步园

1. 引言

    在进行Android手机或PAD的网络开发过程中，检测是否已经连接互连网是必不可少的一步，下面介绍其代码实现。

2. 功能实现

    (1) 主布局(main.xml)实现：<?xml version="1.0" encoding="utf-8"?><br /> <LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"<br /> android:orientation = "vertical"<br /> android:layout_width = "fill_parent"<br /> android:layout_height = "fill_parent"<br /> ></p> <p> <Button<br /> android:id = "@+id/checkNetWork"<br /> android:text = "检测网络"<br /> android:layout_width = "wrap_content"<br /> android:layout_height = "wrap_content"<br /> /></p> <p></LinearLayout>

    (2) 主Activity实现：package com.flora;<br /> import android.app.Activity;<br /> import android.content.Context;<br /> import android.net.ConnectivityManager;<br /> import android.os.Bundle;<br /> import android.view.View;<br /> import android.view.View.OnClickListener;<br /> import android.widget.Button;<br /> import android.widget.Toast;<br /> public class NetWorkActivity extends Activity {</p> <p> @Override<br /> public void onCreate(Bundle savedInstanceState) {<br /> super.onCreate(savedInstanceState);<br /> setContentView(R.layout.main);</p> <p> Button checkNetWork = (Button) findViewById(R.id.checkNetWork);<br /> checkNetWork.setOnClickListener(new OnClickListener() {<br /> @Override<br /> public void onClick(View view) {<br /> if (checkNetWorkStatus()) {<br /> Toast.makeText(NetWorkActivity.this, "连接成功！", Toast.LENGTH_SHORT).show();<br /> } else {<br /> Toast.makeText(NetWorkActivity.this, "连接失败！", Toast.LENGTH_SHORT).show();<br /> }<br /> }<br /> });<br /> }<br /> private boolean checkNetWorkStatus() {<br /> boolean netSataus = false;</p> <p> ConnectivityManager cwjManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);<br /> cwjManager.getActiveNetworkInfo();<br /> if (cwjManager.getActiveNetworkInfo() != null) {<br /> netSataus = cwjManager.getActiveNetworkInfo().isAvailable();<br /> }<br /> return netSataus;<br /> }<br /> }