我最近在tabhost中添加了新标签，并将代码从tab3移到了tab4，所有这些都没问题，直到我点击按钮找到此错误。
这些按钮都显示出某种对话 - 所以问题无疑在这里。
android.view.WindowManager$BadTokenException: Unable to add window -- token android.app.LocalActivityManager$LocalActivityRecord@2f93937 is not valid; is your activity running?
at android.view.ViewRootImpl.setView(ViewRootImpl.java:849)
at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:337)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
at android.app.Dialog.show(Dialog.java:350)
at android.app.Activity.showDialog(Activity.java:3782)
at android.app.Activity.showDialog(Activity.java:3731)
at com.example.tabdemo.Tab4Activity$2.onClick(Tab4Activity.java:100)
at android.view.View.performClick(View.java:5697)
at android.widget.TextView.performClick(TextView.java:10826)
at android.view.View$PerformClick.run(View.java:22526)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7224)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
这是代码
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.TabActivity;
import android.app.TimePickerDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TabHost;
import android.widget.TextView;
import android.widget.TimePicker;
import android.widget.Toast;
public class Tab4Activity extends Activity implements ValueListener
{
Button eta,arrive,complete;
private int pHour;
private int pMinute;
/** This integer will uniquely define the dialog to be used for displaying time picker.*/
static final int TIME_DIALOG_ID = 0;
/** Callback received when the user "picks" a time in the dialog */
private TimePickerDialog.OnTimeSetListener mTimeSetListener =
new TimePickerDialog.OnTimeSetListener() {
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
pHour = hourOfDay;
pMinute = minute;
updateDisplay();
newETA=eta.getText().toString();
displayToast();
task="pETA";
// if job has been selected go and get the ETA
if(MainActivity.job_id>0)
{
BackgroundTask backgroundTaskUpdateETA = new BackgroundTask(Tab4Activity.this);
backgroundTaskUpdateETA.execute(task,""+MainActivity.job_id,newETA,"avail");
}
}
};
/** Updates the time in the TextView */
private void updateDisplay()
{
eta.setText(
new StringBuilder()
.append(pad(pHour)).append(":")
.append(pad(pMinute)));
}
/** Displays a notification when the time is updated */
private void displayToast() {
Toast.makeText(this, new StringBuilder().append("Time choosen is ").append(eta.getText()), Toast.LENGTH_SHORT).show();
}
/** Add padding to numbers less than ten */
private static String pad(int c) {
if (c >= 10)
return String.valueOf(c);
else
return "0" + String.valueOf(c);
}
/////////////////////////////////
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.tab4);
eta =(Button)findViewById(R.id.etaButton);
arrive = (Button)findViewById(R.id.arrivedButton);
complete = (Button)findViewById(R.id.completeJobButton);
eta.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
showDialog(TIME_DIALOG_ID);
}
});
//click listerner for arrived button
arrive.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
pickupAlert();
}
});
complete.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
completeAlert();
}
});
/** Display the current time in the TextView */
updateDisplay();
}
//////////////////////
public void pickupAlert()
{
DialogInterface.OnClickListener dialogClickListener = new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{ switch (which)
{
case DialogInterface.BUTTON_POSITIVE: // Yes button clicked
//do something
break;
case DialogInterface.BUTTON_NEGATIVE: // No button clicked // do nothing
break;
}
}
};
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Arrived At Pickup?")
.setPositiveButton("Yes", dialogClickListener)
.setNegativeButton("No", dialogClickListener)
.show();
}
public void completeAlert()
{
DialogInterface.OnClickListener dialogClickListener = new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{ switch (which)
{
case DialogInterface.BUTTON_POSITIVE: // Yes button clicked
task="complete";
BackgroundTask backgroundTaskArrived = new BackgroundTask(Tab4Activity.this);
backgroundTaskArrived.execute(task,""+MainActivity.job_id,"Complete","avail");
MainActivity.job_id=0;
break;
case DialogInterface.BUTTON_NEGATIVE: // No button clicked // do nothing
Toast.makeText(Tab4Activity.this, "No Clicked", Toast.LENGTH_LONG).show();
break;
}
}
};
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Close This Fare?")
.setPositiveButton("Yes", dialogClickListener)
.setNegativeButton("No", dialogClickListener)
.show();
}
/////////////////////
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case TIME_DIALOG_ID:
return new TimePickerDialog(this,
mTimeSetListener, pHour, pMinute, false);
}
return null;
}
}
如果有任何帮助，我将不胜感激。
我已将问题缩小到
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Arrived At Pickup?")
.setPositiveButton("Yes", dialogClickListener)
.setNegativeButton("No", dialogClickListener)
**.show();**