java.lang.IllegalStateException : Activity has been destroyed on creating a datepicker dialog

Question

我正在尝试使用 DialogFragments 从我的主 Activity 创建一个 DatePicker 对话框。我已经扩展了 DialogFragment 类并按照

返回新的 datePickerDialog

http://developer.android.com/guide/topics/ui/controls/pickers.html

这是我的类(class)代码:

import java.util.Calendar;
import android.app.DatePickerDialog;
import android.app.DatePickerDialog.OnDateSetListener;
import android.app.Dialog;
import android.app.DialogFragment;
import android.os.Bundle;
import android.widget.DatePicker;

public class DatePickerFragment extends DialogFragment implements OnDateSetListener{

    @Override
    public void onDateSet(DatePicker arg0, int arg1, int arg2, int arg3) {
        // TODO set the date for the alarm      
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState){
        //set current date as default date
        final Calendar c = Calendar.getInstance();
        int year = c.get(Calendar.YEAR);
        int month = c.get(Calendar.MONTH);
        int day = c.get(Calendar.DAY_OF_MONTH);

        //Create New Instance of the datepicker dialog
        return new DatePickerDialog(getActivity(), this, year, month, day);
    }

}

我在主 Activity 上有一个按钮来触发对话框:

public void setAlarm(View view){
        //TextView reminder_title  = (TextView) view.findViewById(R.id.reminder_title); 
        DialogFragment dateFragment = new DatePickerFragment();
        dateFragment.show(getFragmentManager(), "date picker");
    }

但是，当我尝试单击该按钮时，我在下面的行中收到“java.lang.IllegalStateException: Activity 已被破坏”异常:

dateFragment.show(getFragmentManager(), "date picker");

这是 Activity 日志:

06-08 15:45:48.261: E/AndroidRuntime(5489): FATAL EXCEPTION: main
06-08 15:45:48.261: E/AndroidRuntime(5489): Process: com.flamesavor.reme, PID: 5489
06-08 15:45:48.261: E/AndroidRuntime(5489): java.lang.IllegalStateException: Activity has been destroyed
06-08 15:45:48.261: E/AndroidRuntime(5489):     at android.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1345)
06-08 15:45:48.261: E/AndroidRuntime(5489):     at android.app.BackStackRecord.commitInternal(BackStackRecord.java:597)
06-08 15:45:48.261: E/AndroidRuntime(5489):     at android.app.BackStackRecord.commit(BackStackRecord.java:575)
06-08 15:45:48.261: E/AndroidRuntime(5489):     at android.app.DialogFragment.show(DialogFragment.java:230)
06-08 15:45:48.261: E/AndroidRuntime(5489):     at com.flamesavor.reme.ReMe.setAlarm(ReMe.java:67)
06-08 15:45:48.261: E/AndroidRuntime(5489):     at com.flamesavor.reme.resources.ListViewAdapter.setAlarm(ListViewAdapter.java:60)
06-08 15:45:48.261: E/AndroidRuntime(5489):     at com.flamesavor.reme.resources.ListViewAdapter$1.onClick(ListViewAdapter.java:48)
06-08 15:45:48.261: E/AndroidRuntime(5489):     at android.view.View.performClick(View.java:4456)
06-08 15:45:48.261: E/AndroidRuntime(5489):     at android.view.View$PerformClick.run(View.java:18462)
06-08 15:45:48.261: E/AndroidRuntime(5489):     at android.os.Handler.handleCallback(Handler.java:733)
06-08 15:45:48.261: E/AndroidRuntime(5489):     at android.os.Handler.dispatchMessage(Handler.java:95)
06-08 15:45:48.261: E/AndroidRuntime(5489):     at android.os.Looper.loop(Looper.java:136)
06-08 15:45:48.261: E/AndroidRuntime(5489):     at android.app.ActivityThread.main(ActivityThread.java:5102)
06-08 15:45:48.261: E/AndroidRuntime(5489):     at java.lang.reflect.Method.invokeNative(Native Method)
06-08 15:45:48.261: E/AndroidRuntime(5489):     at java.lang.reflect.Method.invoke(Method.java:515)
06-08 15:45:48.261: E/AndroidRuntime(5489):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
06-08 15:45:48.261: E/AndroidRuntime(5489):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
06-08 15:45:48.261: E/AndroidRuntime(5489):     at dalvik.system.NativeStart.main(Native Method)

对此的任何帮助将不胜感激。

谢谢。

Answer 1

看看这个例子也许可以帮助您找到正确的解决方案:

How to make a DatePicker with DialogFragment and FragmentManage