java– 如何使用片段添加timePicker？

概述我的应用程序中有4个timePicker.当用户双击editText时,将d出timePicker对话框.但有时当我不小心点击两次以上时,应用程序崩溃并说已经添加了片段.我怎样才能解决这个问题？两次点击editText,我只想在editText上单击一下就显示timePicker对话框.public void onClick(View v) {

我的应用程序中有4个timePicker.当用户双击editText时,将d出timePicker对话框.但有时当我不小心点击两次以上时,应用程序崩溃并说已经添加了片段.我怎样才能解决这个问题？两次点击editText,我只想在editText上单击一下就显示timePicker对话框.

public voID onClick(VIEw v) {        int ID = v.getID();        if (ID == R.ID.editTextTI1) {            tp.setFlag(TimePick.FLAG_START_DATE);            FragmentTransaction ft = getFragmentManager().beginTransaction();            tp.show(ft,"TimePicker");        }        if (ID == R.ID.editTextTO1) {            tp.setFlag(TimePick.FLAG_END_DATE);            FragmentTransaction ft = getFragmentManager().beginTransaction();            tp.show(ft,"TimePicker");        }        if (ID == R.ID.editTextTI2) {            tp.setFlag(TimePick.FLAG_START_DATE1);            FragmentTransaction ft = getFragmentManager().beginTransaction();            tp.show(ft,"TimePicker");        }        if (ID == R.ID.editTextTO2) {            tp.setFlag(TimePick.FLAG_END_DATE1);            FragmentTransaction ft = getFragmentManager().beginTransaction();            tp.show(ft,"TimePicker");        }        if (ID == R.ID.editTextTI3) {            tp.setFlag(TimePick.FLAG_START_DATE2);            FragmentTransaction ft = getFragmentManager().beginTransaction();            tp.show(ft,"TimePicker");        }        if (ID == R.ID.editTextTO3) {            tp.setFlag(TimePick.FLAG_END_DATE2);            FragmentTransaction ft = getFragmentManager().beginTransaction();            tp.show(ft,"TimePicker");        }        if (ID == R.ID.editTextTI4) {            tp.setFlag(TimePick.FLAG_START_DATE3);            FragmentTransaction ft = getFragmentManager().beginTransaction();            tp.show(ft,"TimePicker");        }        if (ID == R.ID.editTextTO4) {            tp.setFlag(TimePick.FLAG_END_DATE3);            FragmentTransaction ft = getFragmentManager().beginTransaction();            tp.show(ft,"TimePicker");        }    }    public static class TimePick extends androID.app.DialogFragment implements TimePickerDialog.OnTimeSetListener {        public static final int FLAG_START_DATE = 00;        public static final int FLAG_END_DATE = 01;        public static final int FLAG_START_DATE1 = 10;        public static final int FLAG_END_DATE1 = 11;        public static final int FLAG_START_DATE2 = 20;        public static final int FLAG_END_DATE2 = 21;        public static final int FLAG_START_DATE3 = 30;        public static final int FLAG_END_DATE3 = 31;        private int flag = 00;        @OverrIDe        public Dialog onCreateDialog(Bundle savedInstanceState) {            final Calendar c = Calendar.getInstance();            int hour = c.get(Calendar.HOUR_OF_DAY);            int minute = c.get(Calendar.MINUTE);            return new TimePickerDialog(getActivity(),this,hour,minute,DateFormat.is24HourFormat(getActivity()));        }        public voID setFlag(int i) {            flag = i;        }        @OverrIDe        public voID onTimeSet(TimePicker vIEw,int hourofDay,int minute) {            if (flag == FLAG_START_DATE) {                start.setText(Integer.toString(hourofDay) + ":" + Integer.toString(minute));                b = start.getText().toString();            }            if (flag == FLAG_END_DATE) {                end.setText(Integer.toString(hourofDay) + ":" + Integer.toString(minute));                c = end.getText().toString();            }            if (flag == FLAG_START_DATE1) {                start1.setText(Integer.toString(hourofDay) + ":" + Integer.toString(minute));                d = start1.getText().toString();            }            if (flag == FLAG_END_DATE1) {                end1.setText(Integer.toString(hourofDay) + ":" + Integer.toString(minute));                e1 = end1.getText().toString();            }            if (flag == FLAG_START_DATE2) {                start2.setText(Integer.toString(hourofDay) + ":" + Integer.toString(minute));                f = start2.getText().toString();            }            if (flag == FLAG_END_DATE2) {                end2.setText(Integer.toString(hourofDay) + ":" + Integer.toString(minute));                g = end2.getText().toString();            }            if (flag == FLAG_START_DATE3) {                start3.setText(Integer.toString(hourofDay) + ":" + Integer.toString(minute));                h = start3.getText().toString();            }            if (flag == FLAG_END_DATE3) {                end3.setText(Integer.toString(hourofDay) + ":" + Integer.toString(minute));                i = end3.getText().toString();            }

LogCat错误

10-15 12:53:17.113    7943-7943/com.example.project.project E/AndroIDRuntime﹕ FATAL EXCEPTION: main    Process: com.example.project.project,PID: 7943    java.lang.IllegalStateException: Fragment already added: TimePick{7c7eb96 #0 TimePicker}            at androID.app.FragmentManagerImpl.addFragment(FragmentManager.java:1219)            at androID.app.BackStackRecord.run(BackStackRecord.java:715)            at androID.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1535)            at androID.app.FragmentManagerImpl.run(FragmentManager.java:482)            at androID.os.Handler.handleCallback(Handler.java:739)            at androID.os.Handler.dispatchMessage(Handler.java:95)            at androID.os.Looper.loop(Looper.java:148)

最佳答案您的代码是如此硬编码并且不易扩展,这可能会导致将来出现许多错误.
您应该尽可能地将通用逻辑封装为最大值,因此在当前情况下：

 public voID onClick(VIEw v) {    EditText editText = (EditText) v;    if (tp==null || !tp.isAdded()){        FragmentTransaction ft = getFragmentManager().beginTransaction();        tp = new TimePick(editText);        tp.show(ft,"TimePicker");    }}@OverrIDepublic voID onStop() {    super.onStop();    if (tp.isAdded()) tp.dismiss();}public static class TimePick extends androID.app.DialogFragment implements TimePickerDialog.OnTimeSetListener {    private EditText editText;    public TimePick(EditText editText) {        this.editText = editText;    }    @OverrIDe    public Dialog onCreateDialog(Bundle savedInstanceState) {        final Calendar c = Calendar.getInstance();        int hour = c.get(Calendar.HOUR_OF_DAY);        int minute = c.get(Calendar.MINUTE);        return new TimePickerDialog(getActivity(),DateFormat.is24HourFormat(getActivity()));    }    @OverrIDe    public voID onTimeSet(TimePicker vIEw,int minute) {        editText.setText(Integer.toString(hourofDay) + ":" + Integer.toString(minute));    }}

如果屏幕上有任何代码,此代码将不会尝试创建新的时间选择器.您可以将目标edittext传递给timePicker片段.当您需要来自这些edittexts(您的a,b,c,d ……变量)的值时,您可以在需要时读取它,而不是onTimeSetMethod.

提供onStop方法来处理活动娱乐案例.在这里,我只是隐藏活跃的时间戳.

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