java - 从 Android 访问基于 SOAP 的 Web 服务时出现 ClassCastException

Question

我正在尝试从 Android Activity 访问 WSDL 中定义的 Web 服务。预期的输出是 json 格式的字符串。 第一步，我的目标是将此字符串打印到 Android 中的 TextView 。所以我使用了以下代码:

import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapPrimitive;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;

import android.os.Bundle;
import android.os.Handler;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.widget.TextView;

public class MainActivity extends Activity {
private final String NAMESPACE = "XXXXXXXXXXXXXXX";
private final String URL = "XXXXXXXXXXXXXXXXX";
private final String SOAP_ACTION = "XXXXXXXXXXXX";
private final String METHOD_NAME = "XXXXXXXXXXXXXXXXX";

private String webResponse = "";
private TextView textView;
private Thread thread;
private Handler handler = new Handler();

/** Called when the activity is first created. */

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    textView = (TextView) findViewById(R.id.textView1);
    startWebAccess();
}

public void startWebAccess() {
    thread = new Thread() {
        public void run() {
            try {
                SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
                SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(
                        SoapEnvelope.VER11);
                envelope.setOutputSoapObject(request);
                HttpTransportSE androidHttpTransport = new HttpTransportSE(
                        URL);

                androidHttpTransport.call(SOAP_ACTION, envelope);
                SoapPrimitive response = (SoapPrimitive) envelope
                        .getResponse();
                webResponse = response.toString();
                Log.d("TAG", webResponse);
            }

            catch (Exception e) {
                e.printStackTrace();
            }

            handler.post(createUI);
        }
    };

    thread.start();
}

final Runnable createUI = new Runnable() {

    public void run() {
        Log.d("TAG", webResponse);
        textView.setText(webResponse);
    }
};

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}
}

但是当我尝试运行代码时，我可以在 log cat 中看到以下错误(并且在 TextView 中没有输出):

java.lang.ClassCastException: java.util.Vector

这是完整的猫输出日志:

08-06 09:57:11.792: D/dalvikvm(953): GC_FOR_MALLOC freed 771 objects / 322464 bytes in 130ms
08-06 09:57:13.252: D/dalvikvm(953): GC_FOR_MALLOC freed 3182 objects / 473904 bytes in 41ms
08-06 09:57:13.252: D/NativeCrypto(953): Freeing OpenSSL session
08-06 09:57:13.293: W/System.err(953): java.lang.ClassCastException: java.util.Vector
08-06 09:57:13.293: W/System.err(953):  at org.sahana.peoplelocator.MainActivity$2.run(MainActivity.java:56)

可能是什么错误？请帮助我，我被困在这里了。

提前致谢!

Answer 1

试试下面的

替换这个

      SoapPrimitive response = (SoapPrimitive) envelope
                    .getResponse();

通过

     SoapObject response=(SoapObject) envelope.bodyIn;

我试过你的代码，这是我得到的结果