如何限制用户在日期选择器对话框中选择过去的日期

Question

下面是我的代码，可以在单击编辑文本后弹出日期对话框。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 的 setMinDate 方法class。

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

Answer 2

第一个 select 当前日期

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

现在将日期与select编辑的日期

进行比较

if (selectedDate.after(currentDate)) {
    // Do something here
} else {
    // Print here "Please select date after current date"
}

Answer 3

用过这个

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式。

如何限制用户在日期选择器对话框中选择过去的日期

How to restrict a user from selecting past dates in a datepicker dialog

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