android 检测网络状态 wifi | mobile | n

private void checkNetworkConnection() {
    // BEGIN_INCLUDE(connect)
    ConnectivityManager connMgr =
            (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo activeInfo = connMgr.getActiveNetworkInfo();
    if (activeInfo != null && activeInfo.isConnected()) {
        wifiConnected = activeInfo.getType() == ConnectivityManager.TYPE_WIFI;
        mobileConnected = activeInfo.getType() == ConnectivityManager.TYPE_MOBILE;
        if (wifiConnected) {
            Log.i(TAG, getString(R.string.wifi_connection));
        } else if (mobileConnected) {
            Log.i(TAG, getString(R.string.mobile_connection));
        }
    } else {
        Log.i(TAG, getString(R.string.no_wifi_or_mobile));
    }
    // END_INCLUDE(connect)
}