如何在 Android 应用程序中创建日期选择器

Question

我想在单击按钮时显示日期选择器。 是否有要使用的控件，或者我需要在按钮的 onClick() 方法中创建自己的控件。如果有，有什么建议可以在那里做什么？

提前致谢

Answer 1

你可以试试下面的代码。

CalenderActivity.java

public class CalenderActivity extends Activity implements OnDateChangedListener, OnMonthChangedListener {

private static final DateFormat FORMATTER = SimpleDateFormat.getDateInstance();
SimpleDateFormat fmt = new SimpleDateFormat("dd/MM/yyyy");


@Bind(R.id.calendarView)
MaterialCalendarView widget;
@Bind(R.id.textView)
TextView textView;
Button ok;
int new_date,new_month;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    this.requestWindowFeature(Window.FEATURE_NO_TITLE);

    setContentView(R.layout.activity_calender);

    getWindow().setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);

    ButterKnife.bind(this);

    widget.setOnDateChangedListener(this);
    widget.setOnMonthChangedListener(this);




    widget.setSelectedDate(Calendar.getInstance());

    Calendar c = Calendar.getInstance();
    System.out.println("Current time => " + c.getTime());

    SimpleDateFormat df = new SimpleDateFormat("dd/MM/yyyy");
    String formattedDate = df.format(c.getTime());
    textView.setText(formattedDate);


   // Toast.makeText(getApplicationContext(),"date is :"+new_date+"/"+new_month+"/"+c.get(Calendar.YEAR),Toast.LENGTH_LONG).show();



    ok = (Button) findViewById(R.id.ok_button);
    ok.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            Intent returnIntent = new Intent();
            returnIntent.putExtra("result", textView.getText().toString());
            setResult(RESULT_OK, returnIntent);
            CalenderActivity.this.finish();


        }
    });
}

@Override
public void onDateChanged(@NonNull MaterialCalendarView widget, @Nullable CalendarDay date) {
    if(date == null) {
        textView.setText(null);
    }
    else {

       // Toast.makeText(getApplicationContext(), "selected date is :  " + date.getDate(), Toast.LENGTH_SHORT).show();
        textView.setText(fmt.format(date.getDate()));
    }
}

@Override
public void onMonthChanged(MaterialCalendarView widget, CalendarDay date) {

 //   Toast.makeText(this, FORMATTER.format(date.getDate()), Toast.LENGTH_SHORT).show();
}
}

activity_calender.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout  xmlns:android="http://schemas.android.com/apk/res/android"
          xmlns:tools="http://schemas.android.com/tools"
          android:orientation="vertical"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:paddingLeft="@dimen/activity_horizontal_margin"
          android:paddingRight="@dimen/activity_horizontal_margin"
          android:paddingTop="@dimen/activity_vertical_margin"
          android:paddingBottom="@dimen/activity_vertical_margin"
          tools:context=".BasicActivity"
>

<com.prolificinteractive.materialcalendarview.MaterialCalendarView
    android:id="@+id/calendarView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    />

<TextView
    android:id="@+id/textView"
    android:layout_margin="16dp"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:text=""
    android:textColor="#000000"
    android:textAppearance="?android:attr/textAppearanceLarge"
    />
<Button
    android:id="@+id/ok_button"
    android:layout_width="150dp"
    android:layout_height="50dp"
    android:text="OK"
    android:textColor="@color/white"
    android:padding="5dp"
    android:background="@drawable/btn_calender_bg"
    android:positiveButtonText="Ok"
    android:layout_gravity="center_horizontal"/>

最后在按钮的“On click”中传递 Intent。 希望这会有所帮助！

Answer 2

尝试以下库以在对话框中打开日历。

https://github.com/wdullaer/MaterialDateTimePicker

并在按钮的单击事件上显示对话框，如下所示。

Button ivLaunchPicker=(Button)findViewById(R.id.button1);
ivLaunchPicker.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // DialogFragment to host SublimePicker
                SublimePickerFragment pickerFrag = new SublimePickerFragment();
                pickerFrag.setCallback(mFragmentCallback);

                // Options
                Pair<Boolean, SublimeOptions> optionsPair = getOptions();

                if (!optionsPair.first) { // If options are not valid
                    Toast.makeText(Sampler.this, "No pickers activated",
                            Toast.LENGTH_SHORT).show();
                    return;
                }

                // Valid options
                Bundle bundle = new Bundle();
                bundle.putParcelable("SUBLIME_OPTIONS", optionsPair.second);
                pickerFrag.setArguments(bundle);

                pickerFrag.setStyle(DialogFragment.STYLE_NO_TITLE, 0);
                pickerFrag.show(getSupportFragmentManager(), "SUBLIME_PICKER");
            }
        });