More Functionalities of Material Design Date Picker in Android
As discussed in the Material Design Date Picker in Android it offers many functionalities to users and is easy to implement for developers. So in this article, we are going to discuss more functionalities of material design date picker with examples. Note that the UI part will be the same as in the Part-1 article. We are going to work with the Java file only.
Functionality 1: Block all the dates before today’s date
This feature is very useful for a developer for avoiding users from choosing the wrong date. A sample GIF is given below to get an idea about what we are going to do in this functionality.
Go to the MainActivity.java file, and refer to the following code. Below is the code for the MainActivity.java file. Comments are added inside the code to understand the code in more detail.
Java
import android.annotation.SuppressLint; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; import androidx.appcompat.app.AppCompatActivity; import com.google.android.material.datepicker.CalendarConstraints; import com.google.android.material.datepicker.DateValidatorPointForward; import com.google.android.material.datepicker.MaterialDatePicker; import com.google.android.material.datepicker.MaterialPickerOnPositiveButtonClickListener; public class MainActivity extends AppCompatActivity { // button to open the material date picker dialog private Button mPickDateButton; // textview to preview the selected date private TextView mShowSelectedDateText; @Override protected void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout.activity_main); // register all the UI widgets with their // appropriate IDs mPickDateButton = findViewById(R.id.pick_date_button); mShowSelectedDateText = findViewById(R.id.show_selected_date); // create the calendar constraint builder CalendarConstraints.Builder calendarConstraintBuilder = new CalendarConstraints.Builder(); // set the validator point forward from june // this mean the all the dates before the June month // are blocked calendarConstraintBuilder.setValidator(DateValidatorPointForward.now()); // instantiate the Material date picker dialog // builder final MaterialDatePicker.Builder materialDatePickerBuilder = MaterialDatePicker.Builder.datePicker(); materialDatePickerBuilder.setTitleText( "SELECT A DATE" ); // now pass the constrained calendar builder to // material date picker Calendar constraints materialDatePickerBuilder.setCalendarConstraints(calendarConstraintBuilder.build()); // now build the material date picker dialog final MaterialDatePicker materialDatePicker = materialDatePickerBuilder.build(); // handle the Select date button to open the // material date picker mPickDateButton.setOnClickListener( new View.OnClickListener() { @Override public void onClick(View v) { // show the material date picker with // supportable fragment manager to // interact with dialog material date // picker dialog fragments materialDatePicker.show(getSupportFragmentManager(), "MATERIAL_DATE_PICKER" ); } }); materialDatePicker.addOnPositiveButtonClickListener( new MaterialPickerOnPositiveButtonClickListener() { @SuppressLint ( "SetTextI18n" ) @Override public void onPositiveButtonClick(Object selection) { // now update the selected date preview mShowSelectedDateText.setText( "Selected Date is : " + materialDatePicker.getHeaderText()); } }); } } |
Kotlin
import android.annotation.SuppressLint; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; import androidx.appcompat.app.AppCompatActivity; import com.google.android.material.datepicker.CalendarConstraints; import com.google.android.material.datepicker.DateValidatorPointForward; import com.google.android.material.datepicker.MaterialDatePicker; import com.google.android.material.datepicker.MaterialPickerOnPositiveButtonClickListener; class MainActivity : AppCompatActivity() { // button to open the material date picker dialog private var mPickDateButton: Button? = null // textview to preview the selected date private var mShowSelectedDateText: TextView? = null override fun onCreate(savedInstanceState: Bundle?) { super .onCreate(savedInstanceState) setContentView(R.layout.activity_main) // register all the UI widgets with their // appropriate IDs mPickDateButton = findViewById(R.id.pick_date_button) mShowSelectedDateText = findViewById(R.id.show_selected_date) // create the calendar constraint builder val calendarConstraintBuilder = CalendarConstraints.Builder() // set the validator point forward from june // this mean the all the dates before the June month // are blocked calendarConstraintBuilder.setValidator(DateValidatorPointForward.now()) // instantiate the Material date picker dialog // builder val materialDatePickerBuilder: MaterialDatePicker.Builder<*> = MaterialDatePicker.Builder.datePicker() materialDatePickerBuilder.setTitleText( "SELECT A DATE" ) // now pass the constrained calendar builder to // material date picker Calendar constraints materialDatePickerBuilder.setCalendarConstraints(calendarConstraintBuilder.build()) // now build the material date picker dialog val materialDatePicker = materialDatePickerBuilder.build() // handle the Select date button to open the // material date picker mPickDateButton.setOnClickListener( object : OnClickListener() { fun onClick(v: View?) { // show the material date picker with // supportable fragment manager to // interact with dialog material date // picker dialog fragments materialDatePicker.show(supportFragmentManager, "MATERIAL_DATE_PICKER" ) } }) materialDatePicker.addOnPositiveButtonClickListener { // now update the selected date preview mShowSelectedDateText.setText( "Selected Date is : " + materialDatePicker.headerText) } } } // This code is added by Ujjwal KUmar Bhardwaj |
Output: Run on Emulator
Functionality 2: Select the today’s date as the default selection as soon as the material date picker dialog opens
Have a look at the following image.
Go to the MainActivity.java file, and refer to the following code. Below is the code for the MainActivity.java file. Comments are added inside the code to understand the code in more detail.
Java
import android.annotation.SuppressLint; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; import androidx.appcompat.app.AppCompatActivity; import com.google.android.material.datepicker.MaterialDatePicker; import com.google.android.material.datepicker.MaterialPickerOnPositiveButtonClickListener; public class MainActivity extends AppCompatActivity { // button to open the material date picker dialog private Button mPickDateButton; // textview to preview the selected date private TextView mShowSelectedDateText; @Override protected void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout.activity_main); // register all the UI widgets with their // appropriate IDs mPickDateButton = findViewById(R.id.pick_date_button); mShowSelectedDateText = findViewById(R.id.show_selected_date); // now create the instance of the regular material // date picker MaterialDatePicker.Builder materialDateBuilder = MaterialDatePicker.Builder.datePicker(); // get the today's date from the method // todayInUtcMilliseconds() long today = MaterialDatePicker.todayInUtcMilliseconds(); // now define the properties of the // materialDateBuilder materialDateBuilder.setTitleText( "SELECT A DATE" ); // now make today's date selected by default as soon // as the dialog opens materialDateBuilder.setSelection(today); // now create the instance of the material date // picker and build the dialog final MaterialDatePicker materialDatePicker = materialDateBuilder.build(); // handle select date button which opens the // material design date picker mPickDateButton.setOnClickListener( new View.OnClickListener() { @Override public void onClick(View v) { // now show the material date picker // dialog by passing // getSupportFragmentmanager() materialDatePicker.show(getSupportFragmentManager(), "MATERIAL_DATE_PICKER" ); } }); // now handle the positive button click from the // material design date picker materialDatePicker.addOnPositiveButtonClickListener( new MaterialPickerOnPositiveButtonClickListener() { @SuppressLint ( "SetTextI18n" ) @Override public void onPositiveButtonClick(Object selection) { // now update selected date preview text mShowSelectedDateText.setText( "Selected Date is : " + materialDatePicker.getHeaderText()); } }); } } |
Kotlin
import android.annotation.SuppressLint; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; import androidx.appcompat.app.AppCompatActivity; import com.google.android.material.datepicker.MaterialDatePicker; import com.google.android.material.datepicker.MaterialPickerOnPositiveButtonClickListener; class MainActivity : AppCompatActivity() { // button to open the material date picker dialog private var mPickDateButton: Button? = null // textview to preview the selected date private var mShowSelectedDateText: TextView? = null override fun onCreate(savedInstanceState: Bundle?) { super .onCreate(savedInstanceState) setContentView(R.layout.activity_main) // register all the UI widgets with their // appropriate IDs mPickDateButton = findViewById(R.id.pick_date_button) mShowSelectedDateText = findViewById(R.id.show_selected_date) // now create the instance of the regular material // date picker val materialDateBuilder: MaterialDatePicker.Builder<*> = MaterialDatePicker.Builder.datePicker() // get the today's date from the method // todayInUtcMilliseconds() val today = MaterialDatePicker.todayInUtcMilliseconds() // now define the properties of the // materialDateBuilder materialDateBuilder.setTitleText( "SELECT A DATE" ) // now make today's date selected by default as soon // as the dialog opens materialDateBuilder.setSelection(today) // now create the instance of the material date // picker and build the dialog val materialDatePicker = materialDateBuilder.build() // handle select date button which opens the // material design date picker mPickDateButton.setOnClickListener( object : OnClickListener() { fun onClick(v: View?) { // now show the material date picker // dialog by passing // getSupportFragmentmanager() materialDatePicker.show(supportFragmentManager, "MATERIAL_DATE_PICKER" ) } }) // now handle the positive button click from the // material design date picker materialDatePicker.addOnPositiveButtonClickListener { // now update selected date preview text mShowSelectedDateText.setText( "Selected Date is : " + materialDatePicker.headerText) } } } // This code is adde by UJjwal Kumar Bhardwaj |
Output: Run on Emulator
Functionality 3: Make the user, select a date within bounds
For example, select the date from March 2020 to December 2020. A sample GIF is given below to get an idea about what we are going to do in this functionality.
Go to the MainActivity.java file, and refer to the following code. Below is the code for the MainActivity.java file. Comments are added inside the code to understand the code in more detail.
Java
import android.annotation.SuppressLint; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; import androidx.appcompat.app.AppCompatActivity; import com.google.android.material.datepicker.CalendarConstraints; import com.google.android.material.datepicker.MaterialDatePicker; import com.google.android.material.datepicker.MaterialPickerOnPositiveButtonClickListener; import java.util.Calendar; import java.util.TimeZone; public class MainActivity extends AppCompatActivity { // button to open the material date picker dialog private Button mPickDateButton; // textview to preview the selected date private TextView mShowSelectedDateText; @Override protected void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout.activity_main); // register all the UI widgets with their // appropriate IDs mPickDateButton = findViewById(R.id.pick_date_button); mShowSelectedDateText = findViewById(R.id.show_selected_date); // create the instance of the calendar to set the // bounds Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone( "UTC" )); // now set the starting bound from current month to // previous MARCH calendar.set(Calendar.MONTH, Calendar.MARCH); long march = calendar.getTimeInMillis(); // now set the ending bound from current month to // DECEMBER calendar.set(Calendar.MONTH, Calendar.DECEMBER); long december = calendar.getTimeInMillis(); // create the instance of the CalendarConstraints // Builder CalendarConstraints.Builder calendarConstraintBuilder = new CalendarConstraints.Builder(); // and set the start and end constraints (bounds) calendarConstraintBuilder.setStart(march); calendarConstraintBuilder.setEnd(december); // instantiate the Material date picker dialog // builder final MaterialDatePicker.Builder materialDatePickerBuilder = MaterialDatePicker.Builder.datePicker(); materialDatePickerBuilder.setTitleText( "SELECT A DATE" ); // now pass the constrained calendar builder to // material date picker Calendar constraints materialDatePickerBuilder.setCalendarConstraints(calendarConstraintBuilder.build()); // now build the material date picker dialog final MaterialDatePicker materialDatePicker = materialDatePickerBuilder.build(); // handle the Select date button to open the // material date picker mPickDateButton.setOnClickListener( new View.OnClickListener() { @Override public void onClick(View v) { // show the material date picker with // supportable fragment manager to // interact with dialog material date // picker dialog fragments materialDatePicker.show(getSupportFragmentManager(), "MATERIAL_DATE_PICKER" ); } }); materialDatePicker.addOnPositiveButtonClickListener( new MaterialPickerOnPositiveButtonClickListener() { @SuppressLint ( "SetTextI18n" ) @Override public void onPositiveButtonClick(Object selection) { // now update the selected date preview mShowSelectedDateText.setText( "Selected Date is : " + materialDatePicker.getHeaderText()); } }); } } |
Kotlin
import android.annotation.SuppressLint; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; import androidx.appcompat.app.AppCompatActivity; import com.google.android.material.datepicker.CalendarConstraints; import com.google.android.material.datepicker.MaterialDatePicker; import com.google.android.material.datepicker.MaterialPickerOnPositiveButtonClickListener; import java.util.Calendar; import java.util.TimeZone; class MainActivity : AppCompatActivity() { // button to open the material date picker dialog private var mPickDateButton: Button? = null // textview to preview the selected date private var mShowSelectedDateText: TextView? = null override fun onCreate(savedInstanceState: Bundle?) { super .onCreate(savedInstanceState) setContentView(R.layout.activity_main) // register all the UI widgets with their // appropriate IDs mPickDateButton = findViewById(R.id.pick_date_button) mShowSelectedDateText = findViewById(R.id.show_selected_date) // create the instance of the calendar to set the // bounds val calendar: Calendar = Calendar.getInstance(TimeZone.getTimeZone( "UTC" )) // now set the starting bound from current month to // previous MARCH calendar.set(Calendar.MONTH, Calendar.MARCH) val march: Long = calendar.getTimeInMillis() // now set the ending bound from current month to // DECEMBER calendar.set(Calendar.MONTH, Calendar.DECEMBER) val december: Long = calendar.getTimeInMillis() // create the instance of the CalendarConstraints // Builder val calendarConstraintBuilder = CalendarConstraints.Builder() // and set the start and end constraints (bounds) calendarConstraintBuilder.setStart(march) calendarConstraintBuilder.setEnd(december) // instantiate the Material date picker dialog // builder val materialDatePickerBuilder: MaterialDatePicker.Builder<*> = MaterialDatePicker.Builder.datePicker() materialDatePickerBuilder.setTitleText( "SELECT A DATE" ) // now pass the constrained calendar builder to // material date picker Calendar constraints materialDatePickerBuilder.setCalendarConstraints(calendarConstraintBuilder.build()) // now build the material date picker dialog val materialDatePicker = materialDatePickerBuilder.build() // handle the Select date button to open the // material date picker mPickDateButton.setOnClickListener( object : OnClickListener() { fun onClick(v: View?) { // show the material date picker with // supportable fragment manager to // interact with dialog material date // picker dialog fragments materialDatePicker.show(supportFragmentManager, "MATERIAL_DATE_PICKER" ) } }) materialDatePicker.addOnPositiveButtonClickListener { // now update the selected date preview mShowSelectedDateText.setText( "Selected Date is : " + materialDatePicker.headerText) } } } //This code is adde by Ujjwal Kumar Bhardwaj |
Output: Run on Emulator
Functionality 4: Open the material date picker dialog at the specific month
For example, open the material date picker dialog in August month. A sample GIF is given below to get an idea about what we are going to do in this functionality.
Go to the MainActivity.java file, and refer to the following code. Below is the code for the MainActivity.java file. Comments are added inside the code to understand the code in more detail.
Java
import android.annotation.SuppressLint; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; import androidx.appcompat.app.AppCompatActivity; import com.google.android.material.datepicker.CalendarConstraints; import com.google.android.material.datepicker.MaterialDatePicker; import com.google.android.material.datepicker.MaterialPickerOnPositiveButtonClickListener; import java.util.Calendar; import java.util.TimeZone; public class MainActivity extends AppCompatActivity { // button to open the material date picker dialog private Button mPickDateButton; // textview to preview the selected date private TextView mShowSelectedDateText; @Override protected void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout.activity_main); // register all the UI widgets with their // appropriate IDs mPickDateButton = findViewById(R.id.pick_date_button); mShowSelectedDateText = findViewById(R.id.show_selected_date); // create the instance of the calendar to set the // bounds Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone( "UTC" )); // from calendar object get the AUGUST month calendar.set(Calendar.MONTH, Calendar.AUGUST); long august = calendar.getTimeInMillis(); // create the instance of the CalendarConstraints // Builder CalendarConstraints.Builder calendarConstraintBuilder = new CalendarConstraints.Builder(); calendarConstraintBuilder.setOpenAt(august); // instantiate the Material date picker dialog // builder final MaterialDatePicker.Builder materialDatePickerBuilder = MaterialDatePicker.Builder.datePicker(); materialDatePickerBuilder.setTitleText( "SELECT A DATE" ); // now pass the constrained calendar builder to // material date picker Calendar constraints materialDatePickerBuilder.setCalendarConstraints(calendarConstraintBuilder.build()); // now build the material date picker dialog final MaterialDatePicker materialDatePicker = materialDatePickerBuilder.build(); // handle the Select date button to open the // material date picker mPickDateButton.setOnClickListener( new View.OnClickListener() { @Override public void onClick(View v) { // show the material date picker with // supportable fragment manager to // interact with dialog material date // picker dialog fragments materialDatePicker.show(getSupportFragmentManager(), "MATERIAL_DATE_PICKER" ); } }); materialDatePicker.addOnPositiveButtonClickListener( new MaterialPickerOnPositiveButtonClickListener() { @SuppressLint ( "SetTextI18n" ) @Override public void onPositiveButtonClick(Object selection) { // now update the selected date preview mShowSelectedDateText.setText( "Selected Date is : " + materialDatePicker.getHeaderText()); } }); } } |
Kotlin
import android.annotation.SuppressLint; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; import androidx.appcompat.app.AppCompatActivity; import com.google.android.material.datepicker.CalendarConstraints; import com.google.android.material.datepicker.MaterialDatePicker; import com.google.android.material.datepicker.MaterialPickerOnPositiveButtonClickListener; import java.util.Calendar; import java.util.TimeZone; class MainActivity : AppCompatActivity() { // button to open the material date picker dialog private var mPickDateButton: Button? = null // textview to preview the selected date private var mShowSelectedDateText: TextView? = null override fun onCreate(savedInstanceState: Bundle?) { super .onCreate(savedInstanceState) setContentView(R.layout.activity_main) // register all the UI widgets with their // appropriate IDs mPickDateButton = findViewById(R.id.pick_date_button) mShowSelectedDateText = findViewById(R.id.show_selected_date) // create the instance of the calendar to set the // bounds val calendar: Calendar = Calendar.getInstance(TimeZone.getTimeZone( "UTC" )) // from calendar object get the AUGUST month calendar.set(Calendar.MONTH, Calendar.AUGUST) val august: Long = calendar.getTimeInMillis() // create the instance of the CalendarConstraints // Builder val calendarConstraintBuilder = CalendarConstraints.Builder() calendarConstraintBuilder.setOpenAt(august) // instantiate the Material date picker dialog // builder val materialDatePickerBuilder: MaterialDatePicker.Builder<*> = MaterialDatePicker.Builder.datePicker() materialDatePickerBuilder.setTitleText( "SELECT A DATE" ) // now pass the constrained calendar builder to // material date picker Calendar constraints materialDatePickerBuilder.setCalendarConstraints(calendarConstraintBuilder.build()) // now build the material date picker dialog val materialDatePicker = materialDatePickerBuilder.build() // handle the Select date button to open the // material date picker mPickDateButton.setOnClickListener( object : OnClickListener() { fun onClick(v: View?) { // show the material date picker with // supportable fragment manager to // interact with dialog material date // picker dialog fragments materialDatePicker.show(supportFragmentManager, "MATERIAL_DATE_PICKER" ) } }) materialDatePicker.addOnPositiveButtonClickListener { // now update the selected date preview mShowSelectedDateText.setText( "Selected Date is : " + materialDatePicker.headerText) } } } //This code is written by Ujjwal KUmar Bhardwaj |
Output: Run on Emulator
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