【Android】Wifi管理与应用
16lz
2022-06-14
检测是否有WIFI可用
WifiManager mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE); if (mWifiManager != null) { List<ScanResult> wifiScanResults = mWifiManager.getScanResults(); if (wifiScanResults != null && wifiScanResults.size() != 0) { } }
检测是否开启WIFI
WifiManager mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE); if (wifiManager.isWifiEnabled()) { wifiManager.setWifiEnabled(false); } else { wifiManager.setWifiEnabled(true); }
Menifest.xml文件进行权限登记
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/><uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/><uses-permission android:name="android.permission.WAKE_LOCK"/>
应用范例
Activity
package com.app.myweb;import java.util.List;import android.app.Activity;import android.content.Context;import android.net.wifi.ScanResult;import android.net.wifi.WifiManager;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;import android.widget.Toast;public class WifiTest extends Activity{private WifiManager wifiManager ;private Button button;private TextView textView1,textView2;@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.wifi);button = (Button) findViewById(R.id.button1);textView1 = (TextView) findViewById(R.id.textView1);textView2 = (TextView) findViewById(R.id.textView2);wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);if (wifiManager.isWifiEnabled()) {//判断Wifi是否开启textView1.setText("WIFI开关:已启用");button.setText("关闭Wifi");} else {textView1.setText("WIFI开关:已关闭");button.setText("打开Wifi");}button.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubif (button.getText().equals("关闭Wifi")) {wifiManager.setWifiEnabled(false);textView1.setText("WIFI开关:已关闭");button.setText("打开Wifi");} else if (button.getText().equals("打开Wifi")) {wifiManager.setWifiEnabled(true);textView1.setText("WIFI开关:已启用");button.setText("关闭Wifi");}}});StringBuilder sBuilder = new StringBuilder();if (wifiManager != null) {List<ScanResult> wifiResults = wifiManager.getScanResults();if (wifiResults != null && wifiResults.size() != 0) {for (int i = 0; i < wifiResults.size(); i++) {ScanResult wifi = wifiResults.get(i);System.out.println(wifi.BSSID);sBuilder.append("第"+i+"个可用Wifi:\n");sBuilder.append("Wifi名称:"+wifi.BSSID + "\n");}} else {Toast.makeText(this, "请检查Wifi是否开启", Toast.LENGTH_LONG).show();sBuilder.append("没有可用Wifi,请检查Wifi是否开启!");}}textView2.setText(sBuilder);}}
XML布局文件
<?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:orientation="vertical" android:padding="10dp" > <RelativeLayout android:layout_width="match_parent" android:layout_height="wrap_content" > <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerVertical="true" android:text="WIFI开关" /> <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:text="开启Wifi" /> </RelativeLayout> <TextView android:id="@+id/textView2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="可用Wifi列表" /></LinearLayout>
更多相关文章
- Android解决HAXM安装的问题
- android中gps的打开关闭
- android开启和关闭移动网络
- Android(安卓)Q自定义开关机动画
- android 使用Java自带的HttpURLConnection 连接网络 读取返回数
- Android(安卓)下保持屏幕常亮的实现方法
- android post请求接口demo
- Android中判断网络连接是否可用
- 如何正常关闭android应用程序