Android之对Wifi的操作
16lz
2021-01-26
wifi的状态有以下几种
WIFI_STATE_DISABLED = 1, 已经关闭
WIFI_STATE_DISABLING = 0, 正在关闭
WIFI_STATE_ENABLED = 3, 已经打开
WIFI_STATE_ENABLING = 2, 正在打开
WIFI_STATE_UNKNOWN = 4 未知状态
为什么会有正在进行的操作呢?是由于打开或关闭一个设备需要时间。
对wifi的操作就是操作WifiManager类,要想操作Wifi我们首先要获取Wif服务
WifiManager wifi = (WifiManager)WifiActivity.this.getSystemService(Context.WIFI_SERVICE);
完整例子如下
package com.example.wifi;import android.net.wifi.WifiManager;import android.os.Bundle;import android.app.Activity;import android.content.Context;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.Toast;/** * Wifi的打开关闭操作 只要是对WifiManager类操作 * @author Administrator * */public class WifiActivity extends Activity {private Button open = null;private Button close = null;private Button get = null;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_wifi);open = (Button)findViewById(R.id.open);close = (Button)findViewById(R.id.close);get = (Button)findViewById(R.id.get);//打开wifiopen.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubWifiManager wifi = (WifiManager)WifiActivity.this.getSystemService(Context.WIFI_SERVICE);wifi.setWifiEnabled(true);System.out.println("wifi state------>" + wifi.getWifiState());Toast.makeText(WifiActivity.this, "打开wifi state = " + wifi.getWifiState(), Toast.LENGTH_SHORT).show();}});//关闭wificlose.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubWifiManager wifi = (WifiManager)WifiActivity.this.getSystemService(Context.WIFI_SERVICE);wifi.setWifiEnabled(false);System.out.println("wifi state------>" + wifi.getWifiState());Toast.makeText(WifiActivity.this, "关闭wifi state = " + wifi.getWifiState(), Toast.LENGTH_SHORT).show();}});//获取wifi的状态get.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubWifiManager wifi = (WifiManager)WifiActivity.this.getSystemService(Context.WIFI_SERVICE);System.out.println("wifi state------>" + wifi.getWifiState());Toast.makeText(WifiActivity.this, "获取wifi state = " + wifi.getWifiState(), Toast.LENGTH_SHORT).show();}});}}
正在关闭的截图
示例代码
点击打开链接
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