偵測目前是否有連到網路上 @ 擲沙小站

public class testActivity extends Activity {

    balabala....

    //偵測是否有連到網路上
    private boolean checkNetworkConnected() {
        boolean result = false;
        ConnectivityManager CM = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
        if (CM == null) {
            result = false;
        } else {
            NetworkInfo info = CM.getActiveNetworkInfo();
            if (info != null && info.isConnected()) {
                if (!info.isAvailable()) {
                    result = false;
                } else {
                    result = true;
                }
                Log.d(TAG, "[目前連線方式]"+info.getTypeName());
                Log.d(TAG, "[目前連線狀態]"+info.getState());
                Log.d(TAG, "[目前網路是否可使用]"+info.isAvailable());
                Log.d(TAG, "[網路是否已連接]"+info.isConnected());
                Log.d(TAG, "[網路是否已連接或連線中]"+info.isConnectedOrConnecting());
                Log.d(TAG, "[網路目前是否有問題 ]"+info.isFailover());
                Log.d(TAG, "[網路目前是否在漫遊中]"+info.isRoaming());
            }
        }
        return result;
    }

}