Android手机联网状态、GPS

一、判断网络连接是否可用public static boolean isNetworkAvailable(Context context) {
        ConnectivityManager cm = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        if (cm == null) {
        } else {
　　　　　　　//如果仅仅是用来判断网络连接
　　　　　　  //则可以使用 cm.getActiveNetworkInfo().isAvailable();
            NetworkInfo[] info = cm.getAllNetworkInfo();
            if (info != null) {
                for (int i = 0; i < info.length; i++) {
                    if (info[i].getState() == NetworkInfo.State.CONNECTED) {
                        return true;
                    }
                }
            }
        }
        return false;
    } 

调用需要加入<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> 这个权限

 二、判断GPS是否打开

  public static boolean isGpsEnabled(Context context) {
        LocationManager lm = ((LocationManager) context
                .getSystemService(Context.LOCATION_SERVICE));
        List<String> accessibleProviders = lm.getProviders(true);
        return accessibleProviders != null && accessibleProviders.size() > 0;
    } 需要加入的权限：<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>

三、判断WIFI是否打开
 public static boolean isWifiEnabled(Context context) {
        ConnectivityManager mgrConn = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        TelephonyManager mgrTel = (TelephonyManager) context
                .getSystemService(Context.TELEPHONY_SERVICE);
        return ((mgrConn.getActiveNetworkInfo() != null && mgrConn
                .getActiveNetworkInfo().getState() == NetworkInfo.State.CONNECTED) || mgrTel
                .getNetworkType() == TelephonyManager.NETWORK_TYPE_UMTS);
    } 

四、判断是否是3G网络
    public static boolean is3rd(Context context) {
        ConnectivityManager cm = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo networkINfo = cm.getActiveNetworkInfo();
        if (networkINfo != null
                && networkINfo.getType() == ConnectivityManager.TYPE_MOBILE) {
            return true;
        }
        return false;
    }  

五、判断是wifi还是3g网络,用户的体现性在这里了，wifi就可以建议下载或者在线播放。
  public static boolean isWifi(Context context) {
            ConnectivityManager cm = (ConnectivityManager) context
                    .getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo networkINfo = cm.getActiveNetworkInfo();
            if (networkINfo != null
                    && networkINfo.getType() == ConnectivityManager.TYPE_WIFI) {
                return true;
            }
            return false;
        }

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>　　--->手机数据权限
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>　　　　--->wifi权限