本文介绍了Android上的微调多AsyncTasks问题的处理方法，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
我得到了一些错误。我知道是什么问题，但我不知道如何解决它。
I'm getting some error. I know what is the problem but I don't know how to fix it.
我有4微调。每个微调相关的一条AsyncTask的。对于短，当我选择spinner1一个项目，以这种方式执行该填充spinner2（选择项添加到第二个的AsyncTask作为参数）第二AsyncTask的继续。
I've 4 spinner. Every spinner related one asynctask. For short, When I select one item on spinner1 , execute second asynctask that populate spinner2 (selected item add to second asynctask as parameter) Continues in this way.
但首先的AsyncTask结束之前，spinner2无法填充。在这种情况下，我得到的错误。如何解决呢？如何使当第一个任务完成，第二个任务的工作？
But before end of first asynctask, spinner2 can't populate. In this case I'm getting error. How to fix it ? How to make when first task finish, second task work ?
下面是code;
首要任务
public class ilceDoldur extends AsyncTask<String[],String[],String[]>{
@Override
protected String[] doInBackground(String[]... params) {
SoapObject request = new SoapObject(NAMESPACE, "ILCEGetir");
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.dotNet = true;
envelope.setOutputSoapObject(request);
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
androidHttpTransport.debug = true;
try {
androidHttpTransport.call("http://tempuri.org/ILCEGetir", envelope);
SoapObject response = (SoapObject) envelope.getResponse();
ilceList = new String[response.getPropertyCount()];
for(int i=0;i<response.getPropertyCount();i++){
ilceList[i] = response.getPropertyAsString(i).toString().trim();
}
}
catch (Exception e) {
e.printStackTrace();
}
return ilceList;
}
protected void onPostExecute(String[] ilceList){
ilceSpinner = (Spinner) findViewById(R.id.spinner1);
ArrayAdapter<String> ilce_adapter = new ArrayAdapter<String>(NormalAnasayfa.this,android.R.layout.simple_spinner_item, ilceList);
ilce_adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
ilceSpinner.setAdapter(ilce_adapter);
kontrol=true;
}
}
第二个任务
public class semtDoldur extends AsyncTask<String,String[],String[]>{
@Override
protected String[] doInBackground(String... ParamIlce) {
PropertyInfo ilce = new PropertyInfo();
ilce.name= "ilce";
ilce.setValue(ParamIlce);
ilce.type = PropertyInfo.STRING_CLASS;
SoapObject request = new SoapObject(NAMESPACE, "SEMTGetir");
request.addProperty(ilce);
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.bodyOut=request;
envelope.dotNet = true;
envelope.setOutputSoapObject(request);
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
androidHttpTransport.debug = true;
try {
androidHttpTransport.call("http://tempuri.org/SEMTGetir", envelope);
SoapObject response = (SoapObject) envelope.getResponse();
semtList = new String[response.getPropertyCount()];
for(int i=0;i<response.getPropertyCount();i++){
semtList[i] = response.getPropertyAsString(i).toString().trim();
}
}
catch (Exception e) {
e.printStackTrace();
}
return semtList;
}
protected void onPostExecute(String[] semtList){
semtSpinner = (Spinner) findViewById(R.id.spinner2);
ArrayAdapter<String> semt_adapter = new ArrayAdapter<String>(NormalAnasayfa.this, android.R.layout.simple_spinner_item, semtList);
semt_adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
semtSpinner.setAdapter(semt_adapter);
kontrol=true;
}
}
的onCreate（）
onCreate()
new ilceDoldur().execute();
if(kontrol==true){
kontrol=false;
ilceSpinner.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
secilenIlce = ilceSpinner.getSelectedItem().toString().trim();
new semtDoldur().execute(secilenIlce);
}
public void onNothingSelected(AdapterView<?> arg0) {}
});
}
修改：
我从网络服务中获取数据并填充spinner1。其中数据（spinner1选择的项目），我会得到什么？和我在哪里填充spinner2执行第二个任务？
推荐答案
我找到的解决方案！
得到web服务的数据：
get data from web service:
private void ilceDoldur(){
SoapObject request = new SoapObject(NAMESPACE, "ILCEGetir");
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.dotNet = true;
envelope.setOutputSoapObject(request);
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
androidHttpTransport.debug = true;
try {
androidHttpTransport.call("http://tempuri.org/ILCEGetir", envelope);
SoapObject response = (SoapObject) envelope.getResponse();
ilceList = new String[response.getPropertyCount()];
for(int i=0;i<response.getPropertyCount();i++){
ilceList[i] = response.getPropertyAsString(i).toString().trim();
}
}
catch (Exception e) {
e.printStackTrace();
}
}
我的AsyncTask：
my AsyncTask:
public class ilceDoldur extends AsyncTask<String,String[],String[]>{
@Override
protected String[] doInBackground(String... params) {
ilceDoldur();
return ilceList;
}
protected void onPostExecute(String[] ilceList){
ilceSpinner = (Spinner) findViewById(R.id.spinner1);
ArrayAdapter<String> ilce_adapter = new ArrayAdapter<String>(NormalAnasayfa.this,android.R.layout.simple_spinner_item, ilceList);
ilce_adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
ilceSpinner.setAdapter(ilce_adapter);
ilceSecildi();
}
}
获取spinner1选定的项目，并启动第二AsyncTask的：
Get spinner1 selected item and start second asynctask:
public String ilceSecildi(){
ilceSpinner.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
secilenIlce = ilceSpinner.getSelectedItem().toString().trim();
new semtDoldurAsync(secilenIlce).execute();
}
public void onNothingSelected(AdapterView<?> arg0) {}
});
return secilenIlce;
}
在执行的onCreate第一个任务：
execute first task in onCreate:
new ilceDoldur().execute();
这篇关于Android上的微调多AsyncTasks问题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！