如果必须使用 AsynxTasc 但我仍然不工作，要在 android 4.0.3 中使用教程吗? [英] To use the tutorial in android 4.0.3 if had to work with AsynxTasc but i still dont work?
本文介绍了如果必须使用 AsynxTasc 但我仍然不工作，要在 android 4.0.3 中使用教程吗?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我使用了 本教程并做了一些更改，使其适用于 android 4.0.3.
I used this tutorial and did some changes that it should work for android 4.0.3.
但还是不行.
有人能给我一个正确的解决方案吗?
Can someone post me a correct solution?
package com.webservice;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;
import android.app.Activity;
import android.graphics.Bitmap;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class FirstScreen extends Activity
{
/** Called when the activity is first created. */
private static String SOAP_ACTION1 = "http://tempuri.org/FahrenheitToCelsius";
private static String SOAP_ACTION2 = "http://tempuri.org/CelsiusToFahrenheit";
private static String NAMESPACE = "http://tempuri.org/";
private static String METHOD_NAME1 = "FahrenheitToCelsius";
private static String METHOD_NAME2 = "CelsiusToFahrenheit";
private static String URL = "http://www.w3schools.com/webservices/tempconvert.asmx?WSDL";
Button btnFar,btnCel,btnClear;
EditText txtFar,txtCel;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_first_screen);
btnFar = (Button)findViewById(R.id.btnFar);
btnCel = (Button)findViewById(R.id.btnCel);
btnClear = (Button)findViewById(R.id.btnClear);
txtFar = (EditText)findViewById(R.id.txtFar);
txtCel = (EditText)findViewById(R.id.txtCel);
btnFar.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
new one1().execute();
}
});
btnCel.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
new one2().execute();
}
});
btnClear.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
txtCel.setText("");
txtFar.setText("");
}
});
}
private class one1 extends AsyncTask<String, Integer, String> {
@Override
protected String doInBackground(String... arg0) {
// TODO Auto-generated method stub
//Initialize soap request + add parameters
SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME1);
//Use this to add parameters
request.addProperty("Fahrenheit",txtFar.getText().toString());
//Declare the version of the SOAP request
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.setOutputSoapObject(request);
envelope.dotNet = true;
try {
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
//this is the actual part that will call the webservice
androidHttpTransport.call(SOAP_ACTION1, envelope);
// Get the SoapResult from the envelope body.
SoapObject result = (SoapObject)envelope.bodyIn;
if(result != null)
{
//Get the first property and change the label text
txtCel.setText(result.getProperty(0).toString());
}
else
{
Toast.makeText(getApplicationContext(), "No Response",Toast.LENGTH_LONG).show();
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
private class one2 extends AsyncTask<String, Integer, String> {
@Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
//Initialize soap request + add parameters
SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME2);
//Use this to add parameters
request.addProperty("Celsius",txtCel.getText().toString());
//Declare the version of the SOAP request
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.setOutputSoapObject(request);
envelope.dotNet = true;
try {
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
//this is the actual part that will call the webservice
androidHttpTransport.call(SOAP_ACTION2, envelope);
// Get the SoapResult from the envelope body.
SoapObject result = (SoapObject)envelope.bodyIn;
if(result != null)
{
//Get the first property and change the label text
txtFar.setText(result.getProperty(0).toString());
}
else
{
Toast.makeText(getApplicationContext(), "No Response",Toast.LENGTH_LONG).show();
}
} catch (Exception e) {
e.printStackTrace();
} return null;
}
}
}
错误日志和代码
private class one1 extends AsyncTask<String, Integer, SoapObject> {
protected SoapObject doInBackground(String... arg0) {
protected **void** onPreExecute(**)**
{
//value from textview/edittext
}
// TODO Auto-generated method stub
//Initialize soap request + add parameters
SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME1);
//Use this to add parameters
request.addProperty("Fahrenheit","30");// provide value here
//Declare the version of the SOAP request
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.setOutputSoapObject(request);
envelope.dotNet = true;
try {
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
androidHttpTransport.call(SOAP_ACTION1, envelope);
**result** = (SoapObject)envelope.bodyIn;
} catch (Exception e) {
e.printStackTrace();
}
return **result**;
}
protected void onPostExecute(SoapObject result)
{
if(result != null)
{
System.out.println(result.getProperty(0).toString());
}
else
{
Toast.makeText(getApplicationContext(), "No Response",Toast.LENGTH_LONG).show();
}
}
}
}
我收到以下语法错误:
语法错误，插入枚举标识符"；完成 EnumHeader 语法令牌void"上的错误，@预期结果无法解析为变量 FirstScreen.java 结果无法解析为变量 FirstScreen.java
Syntax error, insert "enum Identifier" to complete EnumHeader Syntax error on token "void", @ expected result cannot be resolved to a variable FirstScreen.java result cannot be resolved to a variable FirstScreen.java
编辑代码:
package com.webservice;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;
import android.app.Activity;
import android.app.ProgressDialog;
import android.view.View;
import android.view.View.OnClickListener;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class FirstScreen extends Activity
{
private static String SOAP_ACTION1 = "http://tempuri.org/FahrenheitToCelsius";
private static String NAMESPACE = "http://tempuri.org/";
private static String METHOD_NAME1 = "FahrenheitToCelsius";
private static String URL = "http://www.w3schools.com/webservices/tempconvert.asmx?WSDL";
SoapObject result;
Button b;
EditText et;
int value;
TextView tv;
ProgressDialog pd;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
pd= new ProgressDialog(this);
pd.setTitle("Making Soap Request");
setContentView(R.layout.activity_first_screen);
b= (Button) findViewById(R.id.button1);
tv= (TextView) findViewById(R.id.textView2);
et= (EditText) findViewById(R.id.ed);
b.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
value=Integer.parseInt(et.getText().toString());
new one1().execute();
}
});
}
private class one1 extends AsyncTask<String, Integer, SoapObject> {
protected void onPreExecute()
{
pd.show();
}
protected SoapObject doInBackground(String... arg0) {
// TODO Auto-generated method stub
//Initialize soap request + add parameters
SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME1);
//Use this to add parameters
request.addProperty("Fahrenheit",value);
//Declare the version of the SOAP request
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.setOutputSoapObject(request);
envelope.dotNet = true;
try {
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
androidHttpTransport.call(SOAP_ACTION1, envelope);
result = (SoapObject)envelope.bodyIn;
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
protected void onPostExecute(SoapObject result)
{
pd.dismiss();
if(result != null)
{
tv.setText("Result = "+result.getProperty(0).toString());
}
else
{
Toast.makeText(getApplicationContext(), "No Response",Toast.LENGTH_LONG).show();
}
}
}
}
推荐答案
您正在后台线程中更新 UI.您必须在 UI 线程上更新 UI.
You are updating UI in the background thread. You have to update UI on the UI thread.
在 doInBackground() 中返回结果
Return result in doInBackground()
在 onPostExecute() 更新用户界面.
In onPostExecute() update ui.
Void onPostExecute(int result)
{
if(result != null)
{
txtFar.setText(result.getProperty(0).toString());
}
else
{
Toast.makeText(getApplicationContext(), "No Response",Toast.LENGTH_LONG).show();
}
}
http://developer.android.com/reference/android/os/AsyncTask.html.查看链接，尤其是4 个步骤下的主题.
http://developer.android.com/reference/android/os/AsyncTask.html. Look at the link especially the topic under The 4 steps.
在您的活动中.
new SoapRequestTask().execute();//call asyntask from ui.
private class SoapRequestTask extends AsyncTask<Void, Void, Long> {
protected void onPreExecute() {
//display progress dialog
}
protected Long doInBackground(Void... params) {
//make soap request and get result. do not update ui here.
return result;
}
protected void onPostExecute(Long result) {
//dismiss dialog. update ui here.
}
}
http://10keyes.blogspot.in/2012/08/android-implement-ksoap2-in-asynctask.html.asynctask 和 ksoap 的教程.
http://10keyes.blogspot.in/2012/08/android-implement-ksoap2-in-asynctask.html. A tutorial of asynctask and ksoap.
编辑
public class FirstScreen extends Activity
{
private static String SOAP_ACTION1 = "http://tempuri.org/FahrenheitToCelsius";
private static String NAMESPACE = "http://tempuri.org/";
private static String METHOD_NAME1 = "FahrenheitToCelsius";
private static String URL = "http://www.w3schools.com/webservices/tempconvert.asmx?WSDL";
SoapObject result;
Button b;
EditText et;
int value;
TextView tv;
ProgressDialog pd;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
pd= new ProgressDialog(this);
pd.setTitle("Making Soap Request");
setContentView(R.layout.activity_main);
b= (Button) findViewById(R.id.button1);
tv= (TextView) findViewById(R.id.textView2);
et= (EditText) findViewById(R.id.ed);
b.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
value=Integer.parseInt(et.getText().toString());
new one1().execute();
}
});
}
private class one1 extends AsyncTask<String, Integer, SoapObject> {
protected void onPreExecute()
{
pd.show();
}
protected SoapObject doInBackground(String... arg0) {
// TODO Auto-generated method stub
//Initialize soap request + add parameters
SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME1);
//Use this to add parameters
request.addProperty("Fahrenheit",value);
//Declare the version of the SOAP request
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.setOutputSoapObject(request);
envelope.dotNet = true;
try {
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
androidHttpTransport.call(SOAP_ACTION1, envelope);
result = (SoapObject)envelope.bodyIn;
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
protected void onPostExecute(SoapObject result)
{
pd.dismiss();
if(result != null)
{
tv.setText("Result = "+result.getProperty(0).toString());
}
else
{
Toast.makeText(getApplicationContext(), "No Response",Toast.LENGTH_LONG).show();
}
}
}
我的activity_main.xml
My activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="FahrenheitToCelsius" />
<EditText
android:id="@+id/ed"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="43dp" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="37dp"
android:text="MakeRequest" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="20dp"
android:text="Result" />
</LinearLayout>
我手机上的结果.
这篇关于如果必须使用 AsynxTasc 但我仍然不工作，要在 android 4.0.3 中使用教程吗?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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