DialogFragment 创建多个对话框窗口而不是一个

Question

我有一个选项卡式活动，其中包含两个底部选项卡。 FrameLayout 充满了我创建的特殊布局文件。这两个布局文件由扩展 Fragment 类的 java 类运行。这是我现在所拥有的简要说明。

现在是有关问题的详细信息。布局文件包含两个 EditText 字段，单击时必须创建一个 DatePickerDialog。我已经使用 DialogFragment 类实现了对话框，一个用于两个文本字段。但是，当我单击编辑文本时，它们会生成几个 DatePicker 对话框，而不是一个，并且不清楚背后的逻辑是什么。它可能会产生 2、3 甚至 4 个对话窗口。

我该如何解决这个问题？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);
    }
}

tabView 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;
            }
        });
    }
}

还有DialogFragment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 上将 onTouchListener 更改为 onClickListener。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）时都会触发触摸侦听器，而点击侦听器只会触发一次。

所以在DaysTabView 类中，改成这样：

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;
}

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

更改您的 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