Question

我正在使用以下代码在互联网上从我的Android应用程序调用Web服务：

public class WebServiceActivity extends Activity {
    private static final String SOAP_ACTION = "http://tempuri.org/HelloWorld";

    private static final String METHOD_NAME = "HelloWorld";

    private static final String NAMESPACE = "http://tempuri.org/";
    private static final String URL = "http://192.168.1.19/TestWeb/WebService.asmx";


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);



        Button getquote = (Button) findViewById(R.id.getquote);  
        getquote.setOnClickListener(new OnClickListener() {  

        public void onClick(View v) { 
            TextView result1;
            result1=(TextView)findViewById(R.id.result1);
        try {


            SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
            EditText CompanyName = (EditText) findViewById(R.id.CompanyName); 
            String val1 = (CompanyName.getText().toString());
            request.addProperty("passonString", val1);

            SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
            envelope.dotNet=true;
            envelope.setOutputSoapObject(request);

            HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
            androidHttpTransport.call(SOAP_ACTION, envelope);

            Object result = (Object)envelope.getResponse();

            result1.setText(result.toString());
        } catch (Exception e) {

            result1.setText(e.getMessage());
            }
    }
});

}

}

我收到的错误是应用程序没有响应。我是该领域的新手，请帮忙。提前致谢

Answer 1

将您的Web服务请求作为后台任务。通常，网络活动所花费的时间是不可预测的。如果您使用上面的内容，UI线程将阻止。这就是为什么它说“应用程序没有响应”。

我找到了这篇很棒的文章。 http://www.vogella.de/articles/AndroidPerformance/article.html#concurrency 看看2.后台处理

您的示例可以修改如下。

public class WebServiceActivity extends Activity {
    private static final String SOAP_ACTION = "http://tempuri.org/HelloWorld";

    private static final String METHOD_NAME = "HelloWorld";

    private static final String NAMESPACE = "http://tempuri.org/";
    private static final String URL = "http://192.168.1.19/TestWeb/WebService.asmx";

    TextView result1;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        result1 = (TextView) findViewById(R.id.result1);

        Button getquote = (Button) findViewById(R.id.getquote);
        getquote.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {

                // push soap request into background.
                new Thread(new Runnable(){

                    @Override
                    public void run() {
                        doSoapRequest();
                    }

                },"DOINBACKGROUND");
            }
        });

    }

    private void doSoapRequest(){
        try {

            SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
            EditText CompanyName = (EditText) findViewById(R.id.CompanyName);
            String val1 = (CompanyName.getText().toString());
            request.addProperty("passonString", val1);

            SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(
                    SoapEnvelope.VER11);
            envelope.dotNet = true;
            envelope.setOutputSoapObject(request);

            HttpTransportSE androidHttpTransport = new HttpTransportSE(
                    URL);
            androidHttpTransport.call(SOAP_ACTION, envelope);

            Object result = (Object) envelope.getResponse();

//          result1.setText(result.toString());
//           update UI data in a Handler
            Message msg = new Message();
            msg.obj = result.toString();
            result1Handler.sendMessage(msg);
        } catch (Exception e) {

//          result1.setText(e.getMessage());
//           update UI data in a Handler
            Message msg = new Message();
            msg.obj = e.getMessage();
            result1Handler.sendMessage(msg);
        }
    }

    private Handler result1Handler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            result1.setText(msg.obj.toString());
        }

    };

}

从Android应用程序调用Web服务

1 个答案: