Question

我搜索了网页，发现了一个有用的代码来处理和管理像这样的TimePickerDialog

http://androidexample.com/Time_Picker_With_AM_PM_Values_-_Android_Example/index.php?view=article_discription&aid=86&aaid=109

我确实尝试了它并且它可以工作但是当我将它集成到扩展为片段的类时，TimePickerDialog没有显示在按钮上单击

你知道我怎么能实现这个呢？

public class First_Activity extends Fragment implements ActionBar.TabListener {   
 static final int TIME_DIALOG_ID = 1111;
    public Button btnClick;
    TextView STtime;
    int hour,minute; 

@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);


STtime = (TextView) getActivity().findViewById(R.id.textView2);


        /********* display current time on screen Start ********/

           final Calendar c = Calendar.getInstance();
           // Current Hour
           hour = c.get(Calendar.HOUR_OF_DAY);
           // Current Minute
           minute = c.get(Calendar.MINUTE);

           // set current time into output textview
           updateTime(hour, minute);

        /********* display current time on screen End ********/

btnClick = (Button) getActivity().findViewById(R.id.button4);
        btnClick.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                getActivity().showDialog(TIME_DIALOG_ID);

            }
        });
}

 protected Dialog onCreateDialog(int id) {
           switch (id) {
           case TIME_DIALOG_ID:

               // set time picker as current time
               return new TimePickerDialog(getActivity(), timePickerListener, hour, minute,
                       false);

           }
           return null;
       }

private TimePickerDialog.OnTimeSetListener timePickerListener = new TimePickerDialog.OnTimeSetListener() {


           @Override
           public void onTimeSet(TimePicker view, int hourOfDay, int minutes) {
               // TODO Auto-generated method stub
               hour   = hourOfDay;
               minute = minutes;

               updateTime(hour,minute);

            }

       };



private static String utilTime(int value) {

           if (value < 10)
               return "0" + String.valueOf(value);
           else
               return String.valueOf(value);
       }

 private void updateTime(int hours, int mins) {

       String timeSet = "";
       if (hours > 12) {
           hours -= 12;
           timeSet = "PM";
       } else if (hours == 0) {
           hours += 12;
           timeSet = "AM";
       } else if (hours == 12)
           timeSet = "PM";
       else
           timeSet = "AM";


       String minutes = "";
       if (mins < 10)
           minutes = "0" + mins;
       else
           minutes = String.valueOf(mins);

       // Append in a StringBuilder
        String aTime = new StringBuilder().append(hours).append(':')
               .append(minutes).append(" ").append(timeSet).toString();

         STtime.setText(aTime);
   }    
}

Answer 1

我建议您为Frament创建一个如下所示的布局文件：

your_custom_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="fill_parent" 
              android:layout_height="fill_parent" 
              android:orientation="vertical" >
    <Button android:id="@+id/button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Spawn Dialog" />
</LinearLayout>

自定义片段看起来像这样：

public class MyFragment extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.your_custom_layout, container, false);

        Button b = (Button) v.findViewById(R.id.button);
        b.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                createDialog(YOUR_ID).show();
            }
        });

        return v;
    }

    public Dialog createDialog(int id) {
           switch (id) {
           case TIME_DIALOG_ID:

               // set time picker as current time
               return new TimePickerDialog(getActivity(), timePickerListener, hour, minute, false);

           }
           return null;
       }
}

所以你有一个包含按钮的布局片段，当点击按钮时，会产生对话框。

从片段中显示TimePickerDialog

1 个答案: