对话片段创建多个对话窗口，而不是一个

Question

我有一个选项卡式活动，其中包含两个底部选项卡。框架布局充满了我创建的特殊布局文件。这两个布局文件由扩展片段类的 java 类运行。这是我对我现在所拥有的内容的简要描述。

现在来谈谈一个问题的细节。布局文件包含两个 EditText 字段，单击这些字段时必须创建 DatePickerDialog。我已经使用 DialogFragment 类实现了对话框，一个用于两个文本字段。Hovewer，当我单击编辑文本时，它们会生成多个 DatePicker 对话框，而不是一个，目前尚不清楚背后的逻辑是什么。它可以生成 2、3 甚至 4 个对话窗口。

如何解决此问题？这是我的代码：

活动

public class Activity extends AppCompatActivity  {
    FragmentTabHost mFragmentTabHost;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_quick_calculation);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        mFragmentTabHost = (FragmentTabHost) findViewById(android.R.id.tabhost);
        mFragmentTabHost.setup(QuickCalculationActivity.this, getSupportFragmentManager(), android.R.id.tabcontent);
        mFragmentTabHost.addTab(mFragmentTabHost.newTabSpec("days").setIndicator("DAYS"), DaysTabView.class, null);
        mFragmentTabHost.addTab(mFragmentTabHost.newTabSpec("date").setIndicator("DATE"), DateTabView.class, null);
    }
}

选项卡视图类之一

public class DaysTabView extends Fragment {
/* 
 *    some code was not included to make easir to read 
 */
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.days_tab_view, container, false);
        mFromDate = (EditText) v.findViewById(R.id.fromDate);
        mFromDate.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                mFromDate.setText("");
                SetDateToDefault(1);     //some method
                Bundle args = new Bundle();
                args.putInt("day", day1);
                args.putInt("month", month1);
                args.putInt("year", year1);
                myDatePickerDialogFragment d1 = new myDatePickerDialogFragment();
                d1.setArguments(args);
                d1.setOnDateSetListener(datePickerListener1);   //onDateSet Listener that is not included in this question
                d1.show(getFragmentManager(), "days");
                return false;
            }
        });
    }
}

和对话片段类

public class myDatePickerDialogFragment extends DialogFragment{
    int mDay, mMonth, mYear;
    OnDateSetListener onSetDate;
    public myDatePickerDialogFragment(){
    }
    @Override
    public void setArguments(Bundle args) {
        super.setArguments(args);
        mDay = args.getInt("day");
        mMonth = args.getInt("month");
        mYear = args.getInt("year");
    }
    public void setOnDateSetListener(OnDateSetListener setDate){
        onSetDate = setDate;
    }
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        return new DatePickerDialog(getActivity(), onSetDate, mYear, mMonth, mDay);
    }
}

Answer 1

我建议在EditTexts上用onClickListener来更改onTouchListener。背后的原因是每次发生事件（例如手指向下、手指移动、手指向上等）都会触发触摸侦听器，而单击侦听器只会触发一次。

所以在DaysTabView类中，改成这个：

mFromDate.setOnClickListener(new View.OnClickListener() {
        @Override
        public boolean onClick(View v) {
            mFromDate.setText("");
            SetDateToDefault(1);     //some method
            Bundle args = new Bundle();
            args.putInt("day", day1);
            args.putInt("month", month1);
            args.putInt("year", year1);
            myDatePickerDialogFragment d1 = new myDatePickerDialogFragment();
            d1.setArguments(args);
            d1.setOnDateSetListener(datePickerListener1);   //onDateSet Listener that is not included in this question
            d1.show(getFragmentManager(), "days");
            return false;
        }
    });

Answer 2

在setOnTouchListener中返回true而不是false。

if(event.getAction() == MotionEvent.ACTION_UP){
            // Do what you want
            return true;
        }
        return false;
}

它应该是这样的：

   mFromDate.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
             if(event.getAction() == MotionEvent.ACTION_UP){
                 mFromDate.setText("");
                SetDateToDefault(1);     //some method
                Bundle args = new Bundle();
                args.putInt("day", day1);
                args.putInt("month", month1);
                args.putInt("year", year1);
                myDatePickerDialogFragment d1 = new myDatePickerDialogFragment();
                d1.setArguments(args);
                d1.setOnDateSetListener(datePickerListener1);   //onDateSet Listener that is not included in this question
                d1.show(getFragmentManager(), "days");
                return true;
            }
            return false;
    }
        });

Answer 3

更改onTouchListener代码

 mFromDate.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            final int actionPeformed = ev.getAction();
            switch(actionPeformed){
            case MotionEvent.ACTION_UP:{
            mFromDate.setText("");
            SetDateToDefault(1);     //some method
            Bundle args = new Bundle();
            args.putInt("day", day1);
            args.putInt("month", month1);
            args.putInt("year", year1);
            myDatePickerDialogFragment d1 = new myDatePickerDialogFragment();
            d1.setArguments(args);
            d1.setOnDateSetListener(datePickerListener1);   //onDateSet Listener that is not included in this question
            d1.show(getFragmentManager(), "days");
           break;
   }
   return true;
    }
});

Answer 4

也许你应该使用 ClickListener 而不是 TouchListener