activitygroup的子activity中的datepicker会引发BadTokenException错误

Question

我需要在选项卡活动的活动组的子活动中显示两个日期选择器。用于显示日期的两个textview和to按钮的代码如下:

  incorp_date=(TextView)findViewById(R.id.edt_incorpdate);
    incorp_date_image=(Button)findViewById(R.id.incorp_date);

    incorp_date_cal=Calendar.getInstance();
    incorp_date_image.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            showDialog(DATE_PICKER_INCORP);
        }
    });
    final Calendar c = Calendar.getInstance();
    incorp_year = c.get(Calendar.YEAR);
    incorp_month = c.get(Calendar.MONTH);
    incorp_day = c.get(Calendar.DAY_OF_MONTH);
    /* display the current date (this method is below)  */
    updateIncorpDisplay();

    estb_date=(TextView)findViewById(R.id.edt_estabdate);
    estb_date_image=(Button)findViewById(R.id.estb_date);
    estb_date_cal=Calendar.getInstance();
    estb_date_image.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            showDialog(DATE_PICKER_ESTB);
        }
    });
    final Calendar c1 = Calendar.getInstance();
    estb_year = c1.get(Calendar.YEAR);
    estb_month = c1.get(Calendar.MONTH);
    estb_day = c1.get(Calendar.DAY_OF_MONTH);
    /* display the current date (this method is below)  */
    updateEstbDisplay();

显示日期选择器对话框的代码是:

incorp_dateListener=new OnDateSetListener() {
        @Override
        public void onDateSet(DatePicker view, int year, int monthOfYear,
                int dayOfMonth) {
            // TODO Auto-generated method stub
            incorp_year = year;
            incorp_month = monthOfYear;
            incorp_day = dayOfMonth;
            updateIncorpDisplay();
        }
    };
    estb_dateListener=new OnDateSetListener() {
        @Override
        public void onDateSet(DatePicker view, int year, int monthOfYear,
                int dayOfMonth) {
            // TODO Auto-generated method stub
            estb_year = year;
            estb_month = monthOfYear;
            estb_day = dayOfMonth;
            updateEstbDisplay();
        }
    };
  @Override
protected Dialog onCreateDialog(int id) {
    switch(id){
        case DATE_PICKER_INCORP:
                return new DatePickerDialog(getParent(), incorp_dateListener, incorp_year, incorp_month, incorp_day); 
            case DATE_PICKER_ESTB:
                return new DatePickerDialog(getParent(), estb_dateListener, estb_year, estb_month, estb_day);
    }
        return null;
}

我无法显示日期选择器对话框。当我点击按钮并抛出BadTokenException异常时，应用程序强制关闭。我该怎么办?我似乎不知道问题出在哪里?我想可能是因为这是一个活动小组的儿童活动……但找不到任何相关的解决方案…请帮助! !

Answer 1

尝试这样做，首先在TabActivity类中创建tabcontext对象。这样的

package com.loanreminder;
import android.app.TabActivity;
import android.os.Bundle;
/**
 * @author Adil Soomro
 * 
 */
public class TabSample extends TabActivity {
    /** Called when the activity is first created. */
    public static TabSample tabContext;
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.tabhost);
        tabContext = this;
    }
}

在你的活动中像这样使用这个对象后。

protected Dialog onCreateDialog(int id) {
    switch(id){
        case DATE_PICKER_INCORP:
                return new DatePickerDialog(TabSample.tabContext, incorp_dateListener, incorp_year, incorp_month, incorp_day); 
            case DATE_PICKER_ESTB:
                return new DatePickerDialog(TabSample.tabContext, estb_dateListener, estb_year, estb_month, estb_day);
    }
        return null;
}

Answer 2

像这样做

     switch (id) {
case DATE_DIALOG_ID:
 return new DatePickerDialog(getParent(),
             mDateSetListener,
             mYear, mMonth, mDay);
case DATE_DIALOG_ID_RETURN:
 return new DatePickerDialog(getParent(),
   mDateSetListenerreturn,
             mYear, mMonth, mDay);     
 }

我得到了这个解决方案从Android: DatePicker不工作在活动