这是我的代码。我在发送按钮内调用Asynctask并调用在doInBackground方法中实现Webservice代码的sendtoserver方法。
package asynctask.com;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;
import android.os.AsyncTask;
import android.os.Bundle;
import android.app.Activity;
import android.app.ProgressDialog;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.Toast;
import android.support.v4.app.NavUtils;
public class Asyntask extends Activity {
boolean resultofmail;
Button send;
private static final String SOAP_ACTION = "http://sendmail.com/insertfeedback";
private static final String METHOD_NAME = "insertfeedback";
private static final String NAMESPACE = "http://sendmail.com/";
private static final String URL = "http://180.179.48.27:8080/sendmail /sendmailService?wsdl";
EditText ename;
EditText eid,reason;
DatePicker sdate,edate;
Spinner rfl;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.leaverequest);
send=(Button)findViewById(R.id.button1);
eid=(EditText)findViewById(R.id.editText1);
ename=(EditText)findViewById(R.id.editText2);
sdate=(DatePicker)findViewById(R.id.datePicker1);
edate=(DatePicker)findViewById(R.id.datePicker2);
rfl=(Spinner)findViewById(R.id.spinner1);
reason=(EditText)findViewById(R.id.editText3);
send.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
new MailSendingTask().execute((Void[])null);
}
});
}
public boolean sendtoserver()
{
int day =sdate.getDayOfMonth();
int month=sdate.getMonth()+1;
int year =sdate.getYear();
String stdate=day+"/"+month+"/"+year;
int day1 =edate.getDayOfMonth();
int month1=edate.getMonth()+1;
int year1 =edate.getYear();
String eddate=day1+"/"+month1+"/"+year1;
Toast.makeText(getApplicationContext(),stdate+" "+eddate,Toast.LENGTH_LONG).show();
SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
request.addProperty("name",ename.getText().toString());
request.addProperty("code",eid.getText().toString());
request.addProperty("date1",stdate);
request.addProperty("date2",eddate);
request.addProperty("leave",rfl.getSelectedItem().toString());
request.addProperty("reason",reason.getText().toString());
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.setOutputSoapObject(request);
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
try {
androidHttpTransport.call(SOAP_ACTION, envelope);
Toast.makeText(getApplicationContext(),"Mail Sent",Toast.LENGTH_LONG).show();
return true;
}
catch (Exception e) {
Toast.makeText(getApplicationContext(),e.getMessage(),Toast.LENGTH_LONG).show();
return false;
}
}
public class MailSendingTask extends AsyncTask <Void, Void, Void> {
private ProgressDialog progressDialog;
@Override
protected void onPreExecute() {
this.progressDialog = ProgressDialog.show(
Asyntask.this,
"Doing Processing", // title
"Sending Data To Server", // message
true // indeterminate
);
}
@Override
protected Void doInBackground(Void... params) {
resultofmail=sendtoserver();
return null;
}
@Override
protected void onPostExecute(Void v) {
this.progressDialog.cancel();
if (resultofmail)
Toast.makeText(getApplicationContext(), "Mail sent", Toast.LENGTH_LONG).show();
else
Toast.makeText(getApplicationContext(), "Retry", Toast.LENGTH_LONG).show();
}
}
}
logcat的
10-03 00:23:38.600: E/AndroidRuntime(1770): FATAL EXCEPTION: AsyncTask #1
10-03 00:23:38.600: E/AndroidRuntime(1770): java.lang.RuntimeException: An error occured while executing doInBackground()
10-03 00:23:38.600: E/AndroidRuntime(1770): at android.os.AsyncTask$3.done(AsyncTask.java:200)
10-03 00:23:38.600: E/AndroidRuntime(1770): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274)
10-03 00:23:38.600: E/AndroidRuntime(1770): at java.util.concurrent.FutureTask.setException(FutureTask.java:125)
10-03 00:23:38.600: E/AndroidRuntime(1770): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308)
10-03 00:23:38.600: E/AndroidRuntime(1770): at java.util.concurrent.FutureTask.run(FutureTask.java:138)
10-03 00:23:38.600: E/AndroidRuntime(1770): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
10-03 00:23:38.600: E/AndroidRuntime(1770): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
10-03 00:23:38.600: E/AndroidRuntime(1770): at java.lang.Thread.run(Thread.java:1019)
10-03 00:23:38.600: E/AndroidRuntime(1770): Caused by: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
10-03 00:23:38.600: E/AndroidRuntime(1770): at android.os.Handler.<init>(Handler.java:121)
10-03 00:23:38.600: E/AndroidRuntime(1770): at android.widget.Toast.<init>(Toast.java:68)
10-03 00:23:38.600: E/AndroidRuntime(1770): at android.widget.Toast.makeText(Toast.java:231)
10-03 00:23:38.600: E/AndroidRuntime(1770): at asynctask.com.Asyntask.sendtoserver(Asyntask.java:89)
10-03 00:23:38.600: E/AndroidRuntime(1770): at asynctask.com.Asyntask$ReverseGeocodeLookupTask.doInBackground(Asyntask.java:140)
10-03 00:23:38.600: E/AndroidRuntime(1770): at asynctask.com.Asyntask$ReverseGeocodeLookupTask.doInBackground(Asyntask.java:1)
10-03 00:23:38.600: E/AndroidRuntime(1770): at android.os.AsyncTask$2.call(AsyncTask.java:185)
10-03 00:23:38.600: E/AndroidRuntime(1770): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
10-03 00:23:38.600: E/AndroidRuntime(1770): ... 4 more
10-03 00:23:38.770: W/IInputConnectionWrapper(1770): showStatusIcon on inactive InputConnection
10-03 00:23:39.250: E/WindowManager(1770): Activity asynctask.com.Asyntask has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@40565b30 that was originally added here
10-03 00:23:39.250: E/WindowManager(1770): android.view.WindowLeaked: Activity asynctask.com.Asyntask has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@40565b30 that was originally added here
10-03 00:23:39.250: E/WindowManager(1770): at android.view.ViewRoot.<init>(ViewRoot.java:259)
10-03 00:23:39.250: E/WindowManager(1770): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148)
10-03 00:23:39.250: E/WindowManager(1770): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
10-03 00:23:39.250: E/WindowManager(1770): at android.view.Window$LocalWindowManager.addView(Window.java:424)
10-03 00:23:39.250: E/WindowManager(1770): at android.app.Dialog.show(Dialog.java:241)
10-03 00:23:39.250: E/WindowManager(1770): at android.app.ProgressDialog.show(ProgressDialog.java:107)
10-03 00:23:39.250: E/WindowManager(1770): at android.app.ProgressDialog.show(ProgressDialog.java:90)
10-03 00:23:39.250: E/WindowManager(1770): at asynctask.com.Asyntask$ReverseGeocodeLookupTask.onPreExecute(Asyntask.java:129)
10-03 00:23:39.250: E/WindowManager(1770): at android.os.AsyncTask.execute(AsyncTask.java:391)
10-03 00:23:39.250: E/WindowManager(1770): at asynctask.com.Asyntask$1.onClick(Asyntask.java:67)
10-03 00:23:39.250: E/WindowManager(1770): at android.view.View.performClick(View.java:2485)
10-03 00:23:39.250: E/WindowManager(1770): at android.view.View$PerformClick.run(View.java:9080)
10-03 00:23:39.250: E/WindowManager(1770): at android.os.Handler.handleCallback(Handler.java:587)
10-03 00:23:39.250: E/WindowManager(1770): at android.os.Handler.dispatchMessage(Handler.java:92)
10-03 00:23:39.250: E/WindowManager(1770): at android.os.Looper.loop(Looper.java:123)
10-03 00:23:39.250: E/WindowManager(1770): at android.app.ActivityThread.main(ActivityThread.java:3683)
10-03 00:23:39.250: E/WindowManager(1770): at java.lang.reflect.Method.invokeNative(Native Method)
10-03 00:23:39.250: E/WindowManager(1770): at java.lang.reflect.Method.invoke(Method.java:507)
10-03 00:23:39.250: E/WindowManager(1770): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:864)
10-03 00:23:39.250: E/WindowManager(1770): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:622)
10-03 00:23:39.250: E/WindowManager(1770): at dalvik.system.NativeStart.main(Native Method)
注意 - Web服务代码正常工作，没有Asynctask任务 注 - 在doInBackground方法中直接进行耗时的计算时，Asynctask工作正常。
刚刚在doInBackground方法中尝试了它的工作和实现Webservice，但现在我陷入了进步障碍。它不会消失。
if (Looper.myLooper() == null) {
Looper.prepare();
}
mLooper = Looper.myLooper(); resultofmail=sendtoserver();
Looper.loop();
return null;
答案 0 :(得分：2)
不要从doInBackground创建祝酒词。它们是UI，应该在UI线程中运行的AsyncTask方法之一中完成，可能是onProgressUpdate。
答案 1 :(得分：2)
你的吐司是造成这个问题的原因！你可以创建一个方法来在UI线程上为你做吐司。
e.g。
public static void toastMSG (final String msg , int length )
{
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(context, msg, length).show();
}
});
}
然后使用此方法代替Toast.makeText（...）
答案 2 :(得分：2)
当您在 doInBackground（）中运行 sendtoserver（）时尝试显示Toast时会出现此问题。
相反，我建议您重新安排代码并从 doInBackground（）返回任何错误代码，并在 onPostExecute中显示Toast （） - 在 UI线程上运行。
或者您可以使用 runOnUiThread 方法在 UI线程上运行Runnable。