Android学习笔记(二十一)
Wifi网络操作WifiActivity
package org.wp.activity;import android.app.Activity;import android.content.Context;import android.net.wifi.WifiManager;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.Toast;public class WifiActivity extends Activity {private static final String TAG = "WifiActivity";private Button startButton;private Button endButton;private Button checkButton;private WifiManager wifiManager;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);startButton = (Button) this.findViewById(R.id.startWifi);endButton = (Button) this.findViewById(R.id.endWifi);checkButton = (Button) this.findViewById(R.id.checkWifi);startButton.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {wifiManager = (WifiManager) WifiActivity.this.getSystemService(Context.WIFI_SERVICE);wifiManager.setWifiEnabled(true);Log.i(TAG, "Wifi state ===>" + getWifiState(wifiManager.getWifiState()));Toast.makeText(WifiActivity.this, getWifiState(wifiManager.getWifiState()),Toast.LENGTH_SHORT).show();}});endButton.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {wifiManager = (WifiManager) WifiActivity.this.getSystemService(Context.WIFI_SERVICE);wifiManager.setWifiEnabled(false);Log.i(TAG, "Wifi state ===>" + getWifiState(wifiManager.getWifiState()));Toast.makeText(WifiActivity.this, getWifiState(wifiManager.getWifiState()),Toast.LENGTH_SHORT).show();}});checkButton.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {wifiManager = (WifiManager) WifiActivity.this.getSystemService(Context.WIFI_SERVICE);Log.i(TAG, "Wifi state ===>" + getWifiState(wifiManager.getWifiState()));Toast.makeText(WifiActivity.this, getWifiState(wifiManager.getWifiState()),Toast.LENGTH_SHORT).show();}});}private static String getWifiState(Integer state) {switch (state) {case WifiManager.WIFI_STATE_DISABLING:return "当前Wifi网卡状态为正在关闭中";case WifiManager.WIFI_STATE_DISABLED:return "当前Wifi网卡状态为关闭状态";case WifiManager.WIFI_STATE_ENABLING:return "当前Wifi网卡状态为正在打开中";case WifiManager.WIFI_STATE_ENABLED:return "当前Wifi网卡状态为打开状态";default:return "Unknown Wifi State";}}}
main.xml
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" ><Buttonandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:text="启动手机Wifi网卡"android:id="@+id/startWifi"/><Buttonandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:text="关闭手机Wifi网卡"android:id="@+id/endWifi"/><Buttonandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:text="检查当前手机Wifi网卡状态"android:id="@+id/checkWifi"/></LinearLayout>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"package="org.wp.activity" android:versionCode="1" android:versionName="1.0"><application android:icon="@drawable/icon" android:label="@string/app_name"><activity android:name=".WifiActivity" android:label="@string/app_name"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity></application><!-- 使用Wifi访问网络所需要的权限 --><!-- Allows applications to change network connectivity state --><uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" /><!-- Allows applications to change Wi-Fi connectivity state --><uses-permission android:name="android.permission.CHANGE_WIFI_STATE" /><!-- Allows applications to access information about networks --><uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /><!-- Allows applications to access information about Wi-Fi networks --><uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /><uses-sdk android:minSdkVersion="4" /></manifest>
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