Question

下面是我的代码，可以在点击edittext后弹出日期对话框。我的主要问题是限制用户选择过去的日期作为输入。

MainActivity.java

public class MainActivity extends AppCompatActivity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final Spinner spinner_from = (Spinner) findViewById(R.id.spinFrom);
        final Spinner spinner_to = (Spinner) findViewById(R.id.spinTo);
        Button Searchbtn = (Button) findViewById(R.id.btn_search);

        Searchbtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String location = spinner_from.getSelectedItem().toString();
                String destination = spinner_to.getSelectedItem().toString();

            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        //adds icons to the action bar
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        //to handle actions performed by icons on action bar
        switch (item.getItemId()){

            case R.id.admin_button:
                startActivity(new Intent(this, AdminLogin.class));
                return true;

            case R.id.action_about:
                startActivity(new Intent(this, AboutBookBus.class));
                return true;
        }

        return super.onOptionsItemSelected(item);
    }

    //to handle the date dialog and set it to the edittext
    public void onStart(){
        super.onStart();
        EditText travelDate = (EditText)findViewById(R.id.travelDate);
        travelDate.setOnClickListener(new View.OnClickListener(){

            @Override
            public void onClick(View view) {
                DateDialog dialog = new DateDialog(view);
                FragmentTransaction ft = getFragmentManager().beginTransaction();
                dialog.show(ft, "DatePicker");
            }


        });
    }
    }

DateDialog.java

public class DateDialog extends DialogFragment implements DatePickerDialog.OnDateSetListener {

    EditText travelDate;
    String Current_date = new SimpleDateFormat("dd/MM/yyyy").format(new Date());

    public DateDialog(View view) {
        travelDate = (EditText) view;
    }

    //dialog context to set the date
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        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);
        return new DatePickerDialog(getActivity(), this, year, month, day);
    }

    public void onDateSet(DatePicker view, int year, int month, int day) {
        String date = year + "-" + (month + 1) + "-" + day;
        travelDate.setText(date);


    }
}

activity_main.xml中的Edittext部分

<EditText
        android:layout_width="350dp"
        android:layout_height="42dp"
        android:inputType="textPersonName"
        android:ems="10"
        android:id="@+id/travelDate"
        tools:ignore="HardcodedText,TextFields"
        android:hint="Touch to add travel date"
        app:layout_constraintLeft_toLeftOf="@+id/textView"
        android:focusable="false"
        android:focusableInTouchMode="false"
        android:layout_marginTop="8dp"
        app:layout_constraintTop_toBottomOf="@+id/textView"
        app:layout_constraintRight_toRightOf="@+id/textView"
        app:layout_constraintHorizontal_bias="0.75" />

非常感谢您的反馈和帮助。

Answer 1

使用DatePicker类的setMinDate方法。

datePicker.setMinDate（System.currentTimeMillis（） - 1000）;

Answer 2

首先选择当前日期

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">

<link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.css" rel="stylesheet">

<div class="row speakers_list p-t-md p-l-md" >
                          <div class="col-lg-2 col-md-2 col-sm-2 col-xs-2 m-b-lg">
                            <div class="selected_div">
                              <i class="fa fa-check text-white"></i>
                            </div>
                            <div class="speaker_div">
                                <img src="http://img.xcitefun.net/users/2011/02/231256,xcitefun-beautiful-small-nature-world-01.jpg" class=" img-responsive img-circle">
                            </div>
                            <div class="speaker_name text-center m-t-xs">
                              <span> 1 </span>
                            </div>
                          </div>
                          <div class="col-lg-2 col-md-2 col-sm-2 col-xs-2 m-b-lg">
                            <div class="speaker_div">
                                <img src="http://img.xcitefun.net/users/2011/02/231256,xcitefun-beautiful-small-nature-world-01.jpg" class=" img-responsive img-circle">
                            </div>
                            <div class="speaker_name text-center m-t-xs">
                              <span> 2 </span>
                            </div>
                          </div>
                         
                         
                        </div>

现在将日期与所选日期进行比较

Calendar c = Calendar.getInstance();
Date currentDate= c.getTime();

Answer 3

使用此

Calendar calendar=Calendar.getInstance();
    calendar.add(Calendar.DAY_OF_MONTH,-1);
    dialog.getDatePicker().setMaxDate(calendar.getTime().getTime());

这是限制昨天日期的最佳方法。

如何限制用户在datepicker对话框中选择过去的日期

3 个答案: