Mars Chen培训之Wifi管理代码实现

总结：

(1)andriod仿真机不能控制wifi状态，因此需要拿真机来调试，配置过程参见真机调试博客（http://blog.youkuaiyun.com/luofeixiongsix/article/details/48058581）。

这里测试通过的是Samsung S4, andriod sdk 4.4

(1)Manifest.xml //里面几个andriod permission比较重要，别忘记了。

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.wifi"
    android:versionCode="1"
    android:versionName="1.0" >


    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />


    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.wifi.MainActivity"
            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>
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"></uses-permission>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission>

</manifest>

(2)MainActivity.java

package com.example.wifi;


import android.app.Activity;
import android.content.Context;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;


public class MainActivity extends Activity {

private Button startButton = null;
private Button stopButton = null;
private Button checkButton = null;

private WifiManager wifiManager = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        startButton = (Button)findViewById(R.id.start);
        stopButton = (Button)findViewById(R.id.stop);
        checkButton = (Button)findViewById(R.id.check);
        
        startButton.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
wifiManager = (WifiManager)MainActivity.this.getSystemService(Context.WIFI_SERVICE);
wifiManager.setWifiEnabled(true);
System.out.println("Wifi State --->" + wifiManager.getWifiState());
Toast.makeText(MainActivity.this, "Current Wifi state is " + wifiManager.getWifiState(), Toast.LENGTH_SHORT).show();
}
});
        
        stopButton.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
wifiManager = (WifiManager)MainActivity.this.getSystemService(Context.WIFI_SERVICE);
wifiManager.setWifiEnabled(false);
System.out.println("Wifi State -->" + wifiManager.getWifiState());
Toast.makeText(MainActivity.this, "Current Wifi state is " + wifiManager.getWifiState(), Toast.LENGTH_LONG).show();
}
});
        
        checkButton.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
wifiManager = (WifiManager)MainActivity.this.getSystemService(Context.WIFI_SERVICE);
System.out.println("Wifi state -->" + wifiManager.getWifiState());
Toast.makeText(MainActivity.this, "Current Wifi state is " + wifiManager.getWifiState(), Toast.LENGTH_LONG).show();
}
});
    }




    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
    
}