Android 監聽 WiFi 開關狀態

轉載請標明出處：http://blog.csdn.net/zhaoyanjun6/article/details/70854309
本文出自【趙彥軍的博客】

• WifiSwitch_Presenter 源碼：

package com.yiba.wifi.sdk.lib.presenter;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.wifi.WifiManager;

/**
 * Created by ${zhaoyanjun} on 2017/3/29.
 * Wifi 開關監聽
 */

public class WifiSwitch_Presenter {
    private Context mContext ;
    private Receiver receiver ;
    private WifiSwitch_Interface mInterface ;


    public WifiSwitch_Presenter( Context context , WifiSwitch_Interface mInterface ){
        this.mContext = context ;
        this.mInterface = mInterface ;

        observeWifiSwitch();
    }

    private void observeWifiSwitch(){
        IntentFilter filter = new IntentFilter();
        filter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION);
        receiver = new Receiver() ;
        mContext.registerReceiver(receiver, filter);
    }

    /**
     * 釋放資源
     */
    public void onDestroy(){
        if ( receiver != null ){
            mContext.unregisterReceiver( receiver );
        }
        if (mContext!=null){
            mContext = null;
        }
    }

    class Receiver extends BroadcastReceiver {

        @Override
        public void onReceive(Context context, Intent intent) {
            int wifiState = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, 0);
            switch (wifiState) {
                case WifiManager.WIFI_STATE_DISABLED:
                    if (mInterface != null){
                        mInterface.wifiSwitchState(WifiSwitch_Interface.WIFI_STATE_DISABLED);
                    }
                    break;
                case WifiManager.WIFI_STATE_DISABLING:
                    if (mInterface != null){
                        mInterface.wifiSwitchState(WifiSwitch_Interface.WIFI_STATE_DISABLING);
                    }
                    break;
                case WifiManager.WIFI_STATE_ENABLED:
                    if (mInterface != null){
                        mInterface.wifiSwitchState(WifiSwitch_Interface.WIFI_STATE_ENABLED);
                    }
                    break;
                case WifiManager.WIFI_STATE_ENABLING:
                    if ( mInterface != null ) {
                        mInterface.wifiSwitchState(WifiSwitch_Interface.WIFI_STATE_ENABLING);
                    }
                    break;
                case WifiManager.WIFI_STATE_UNKNOWN:
                    if ( mInterface != null ){
                        mInterface.wifiSwitchState( WifiSwitch_Interface.WIFI_STATE_UNKNOWN );
                    }
                    break;
            }
        }
    }
}

• WifiSwitch_Interface 源碼

package com.yiba.wifi.sdk.lib.presenter;

/**
 * Created by ${zhaoyanjun} on 2017/3/29.
 * Wifi 開關監聽
 */

public interface WifiSwitch_Interface {

    int WIFI_STATE_ENABLING = 0 ;
    int WIFI_STATE_ENABLED = 1 ;
    int WIFI_STATE_DISABLING = 2 ;
    int WIFI_STATE_DISABLED = 3 ;
    int WIFI_STATE_UNKNOWN  = 4 ;

    void wifiSwitchState( int state );
}

• 使用方式 MainActivity ：

package com.yiba.core;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements WifiSwitch_Interface {

    private WifiSwitch_Presenter wifiSwitch_presenter ;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        wifiSwitch_presenter = new WifiSwitch_Presenter( this , this ) ;

    }

    @Override
    public void wifiSwitchState(int state) {
        switch ( state ){
            case WifiSwitch_Interface.WIFI_STATE_DISABLED  :
                Toast.makeText(this, "WiFi 已經關閉", Toast.LENGTH_SHORT).show();
                break;
            case WifiSwitch_Interface.WIFI_STATE_DISABLING:
                Toast.makeText(this, "WiFi 正在關閉", Toast.LENGTH_SHORT).show();
                break;
            case WifiSwitch_Interface.WIFI_STATE_ENABLED  :
                Toast.makeText(this, "WiFi 已經打開", Toast.LENGTH_SHORT).show();
                break;
            case WifiSwitch_Interface.WIFI_STATE_ENABLING  :
                Toast.makeText(this, "WiFi 正在打開", Toast.LENGTH_SHORT).show();
                break;
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();

        //釋放資源
        if ( wifiSwitch_presenter != null ){
            wifiSwitch_presenter.onDestroy();
        }
    }
}