矿工日志

Android wifi 设置相关

  • WifiManager

    获得WifiManager的实例

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    private WifiManager mWifiManager = (WifiManager)c.getSystemService(Context.WIFI_SERVICE);
  • 检测Wiif的状态

    Wifi的状态值常量

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    WIFI_STATE_DISABLED = 1; //Wi-Fi is disabled.
    WIFI_STATE_DISABLING = 0; //Wi-Fi is currently being disabled
    WIFI_STATE_ENABLED = 3; //Wi-Fi is enabled.
    WIFI_STATE_ENABLING = 2; //Wi-Fi is currently being enabled.
    WIFI_STATE_UNKNOWN = 4; //Wi-Fi is in an unknown state

Wifi状态监测

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int state = mWifiManager.isWifiEnabled();

state的值,对应上面的wifi状态常量

  • 连接wifi

    打开wifi

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    mWifiManager.setWifiEnabled(true);

    关闭wifi

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    mWifiManager.setWifiEnabled(false);
  • Wifi 状态的变化的监听

    Wifi状态的变化可以通过广播来监听

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    private BroadcastReceiver mReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
    String action = intent.getAction();
    if(action.equals(WifiManager.WIFI_STATE_CHANGED_ACTION)){
    int s = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, WifiManager.WIFI_STATE_UNKNOWN);
    //wifi的状态变化会触发这个广播
    //s的值对应上面的wifi状态常量,可以根据不同的状态值来更新界面
    }
    }
    };

    链接wifi

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    //netId 可以通过添加一个WifiConfiguration获得
    int netId = mWifiManager.addNetwork(config);
    boolean b = mWifiManager.enableNetwork(netId, true);

    添加WifiConfiguration
    //ssid : wifi 的名称,pwd: wifi的密码 ,type: 加密方式 0:没有加密 1:wep 2: wap

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    public WifiConfiguration createWifiInfo(String ssid,String pwd,int type){
    log.e("create wifif ssid: "+ssid+" pwd: "+pwd+" type "+type);
    WifiConfiguration cfg = new WifiConfiguration();
    WifiConfiguration tempConfig = this.isExist(ssid);
    if(tempConfig != null) {
    mWifiManger.removeNetwork(tempConfig.networkId);
    }
    cfg.SSID = "\"" + ssid + "\"";
    if( !TextUtils.isEmpty(pwd)) {
    if(type == 0){
    cfg.wepKeys[0] = "";
    cfg.allowedKeyManagement.set(0);
    cfg.wepTxKeyIndex = 0;
    }else if( type == 1 ) {
    cfg.wepKeys[0] = "\"" + pwd + "\"";
    cfg.wepTxKeyIndex = 0;
    }else {
    cfg.preSharedKey = "\"" + pwd + "\"";
    }
    }
    return cfg;
    }

    wifi断开连接

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    mWifiManager.disableNetwork(netId);

    删除已经保存的wifi

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    boolean r = mWifiManager.removeNetwork(netId);
  • 扫描可用的Wifi

    Wifi连接之后,可以扫描当前可以使用的wifi

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    boolean scan = mWifiManager.startScan(); //返回true,说明扫描成功

    获取扫描到的wifi列表

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    List<ScanResult> scanResults = mWifiManager.getScanResults();

    通过ScanResult可以获得wifi的相关信息

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    for(ScanResult sr : scanResults){
    String SSID = sr.SSID; //wifi的名称,在设置中显示的名称
    String BSSID = sr.BSSID; //wifi的地址
    String cap = sr.capabilities; //wifi的加密方式
    int freq = sr.frequency ; //wifi的频率
    int level = sr.level; //wifi的强度
    }

    计算wifi的强度

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    int level = WifiManager.calculateSignalLevel(sr.level, 5);
  • 获取已经连接的wifi的信息

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    WifiInfo wi = mWifiManger.getConnectionInfo();

WifiInfo 的信息如图
这里写图片描述

  • 获取已经配置好的wifi的信息

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    List<WifiConfiguration> configs = mWifiManager.getConfiguredNetworks();

WifiConfiguration的信息如图
这里写图片描述
这里写图片描述