除了wifi连接之外，我的Android应用程序无法工作

我已在清单中授予用户权限

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> 

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您可以创建一个类似这样的公共类来检查网络状态

public class NetworkStatus {
    private static NetworkStatus instance = new NetworkStatus();
    static Context context;
    ConnectivityManager connectivityManager;
    NetworkInfo wifiInfo, mobileInfo;
    boolean connected = false;

    public static NetworkStatus getInstance(Context ctx) {
        context = ctx;
        return instance;
    }
    public boolean isOnline(Context con) {
        try {
            connectivityManager = (ConnectivityManager) con.getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
            connected = networkInfo != null && networkInfo.isAvailable() && networkInfo.isConnected();
            return connected;
        } catch (Exception e) {
            e.printStackTrace();
            Toast.makeText(context, "Check Connectivity Exception: " + e.getMessage(), Toast.LENGTH_SHORT).show();
            //Log.v("connectivity", e.toString());
        }
        return connected;
    }

    public boolean isConnectedToInternet(){
        connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        if (connectivityManager != null){
            NetworkInfo[] info = connectivityManager.getAllNetworkInfo();
            if (info != null){
                for (int i = 0; i < info.length; i++){
                    if (info[i].getState() == NetworkInfo.State.CONNECTED){
                        return true;
                    }
                }
            }
        }
        return false;
    }

}

最终字符串imageurl=http://192.168.0.180/hrm/empimages100/ 指本地网络中很可能无法通过GPRS访问的地址。

---

它不会返回错误，可能是因为您在new LoadImage.executeimageurl中管理了一些异常；部分此外，这个字符串在我看来像构造函数，但生成的对象不会出现在任何地方。

显示您的代码。。。

public class NetworkStatus {
    private static NetworkStatus instance = new NetworkStatus();
    static Context context;
    ConnectivityManager connectivityManager;
    NetworkInfo wifiInfo, mobileInfo;
    boolean connected = false;

    public static NetworkStatus getInstance(Context ctx) {
        context = ctx;
        return instance;
    }
    public boolean isOnline(Context con) {
        try {
            connectivityManager = (ConnectivityManager) con.getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
            connected = networkInfo != null && networkInfo.isAvailable() && networkInfo.isConnected();
            return connected;
        } catch (Exception e) {
            e.printStackTrace();
            Toast.makeText(context, "Check Connectivity Exception: " + e.getMessage(), Toast.LENGTH_SHORT).show();
            //Log.v("connectivity", e.toString());
        }
        return connected;
    }

    public boolean isConnectedToInternet(){
        connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        if (connectivityManager != null){
            NetworkInfo[] info = connectivityManager.getAllNetworkInfo();
            if (info != null){
                for (int i = 0; i < info.length; i++){
                    if (info[i].getState() == NetworkInfo.State.CONNECTED){
                        return true;
                    }
                }
            }
        }
        return false;
    }

}