異常讀WIFI/3G州

您好我有下面的代碼讀取網絡/ WIFI狀態：異常讀WIFI/3G州

public String getMacAddress() { 
    WifiManager wm = (WifiManager) context 
      .getSystemService(Context.WIFI_SERVICE); 
    return wm.getConnectionInfo().getMacAddress(); 
}

這將引發

Caused by: java.lang.SecurityException: WifiService: Neither user 10032 nor current process has android.permission.ACCESS_WIFI_STATE

而且

public boolean is3G() { 
    ConnectivityManager connectivityManager = (ConnectivityManager) context 
      .getSystemService(Context.CONNECTIVITY_SERVICE); 
    return !(connectivityManager.getNetworkInfo(
      ConnectivityManager.TYPE_MOBILE).getState() == NetworkInfo.State.CONNECTED || connectivityManager 
      .getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState() == NetworkInfo.State.CONNECTED); 
}

這將引發

Caused by: java.lang.SecurityException: ConnectivityService: Neither user 10032 nor current process has android.permission.ACCESS_NETWORK_STATE.

之前有人告訴我的權限，這是我的清單（相關部分）：

<manifest> 
    <!-- usual tags for activitys... etc.. --> 

    <uses-permission android:name="android.permission.WRITE_OWNER_DATA" /> 
    <uses-permission android:name="android.permission.READ_OWNER_DATA" /> 
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 
    <uses-permission android:name="android.permission.INTERNET" /> 
    <user-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> 
    <user-permission android:name="android.permission.ACCESS_WIFI_STATE" /> 
</manifest>

來源

2011-05-17 Marcos Vasconcelos