Adding a second sample on how to use RangePickerSample savvisingh#75

app/src/main/AndroidManifest.xml

@@ -16,6 +16,8 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <activity android:name=".ActiveDatesRangePickerSampleActivity">
+        </activity>
     </application>
 
 </manifest>

app/src/main/java/com/savvi/rangepickersample/ActiveDatesRangePickerSampleActivity.java

@@ -0,0 +1,160 @@
+package com.savvi.rangepickersample;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.Toast;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import com.savvi.rangedatepicker.CalendarPickerView;
+
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.List;
+import java.util.Locale;
+
+/*
+ * Create a calendar with a list of specific dates that can be selected by the user, and all the rest of the dates are deactivated.
+ * Define the selectable dates using .withAllDatesDeactivatedExcept(list)
+ * When a range is selected, onRangeSelected is called.
+ * If a range is already selected and the user selects one more date, the previously selected range is deselected and the user can select it again.
+ */
+public class ActiveDatesRangePickerSampleActivity extends AppCompatActivity {
+
+    CalendarPickerView calendar;
+    Button button;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_sample);
+
+        final Calendar nextYear = Calendar.getInstance();
+        nextYear.add(Calendar.YEAR, 10);
+
+        final Calendar lastYear = Calendar.getInstance();
+        lastYear.add(Calendar.YEAR, -10);
+
+        calendar = findViewById(R.id.calendar_view);
+        button = findViewById(R.id.get_selected_dates);
+
+        final ArrayList<Integer> list = new ArrayList<>();
+        list.add(2);
+
+        final ArrayList<Date> possibleBeginningDates = getPossibleBeginningDates();
+        final ArrayList<Date> possibleEndingDates = getPossibleEndingDates();
+
+        calendar.init(lastYear.getTime(), nextYear.getTime(), new SimpleDateFormat("MMMM, YYYY", Locale.getDefault()))
+                .inMode(CalendarPickerView.SelectionMode.RANGE)
+                .withAllDatesDeactivatedExcept(possibleBeginningDates)
+                .withDeactivateDates(list);
+
+        // When the beginning date of the range has been selected, let the user choose one of the possible ending dates.
+        // When a range is selected call onRangeSelected(list).
+        // If user selects another date once a range is already selected, that range will be deselected so that user can select it again.
+        calendar.setOnDateSelectedListener(new CalendarPickerView.OnDateSelectedListener() {
+            @Override
+            public void onDateSelected(Date date) {
+                // If only beginning date has been selected, activate possibleEndingDates
+                if (calendar.getSelectedDates().size() == 1)
+                    calendar.replaceActivatedDates(possibleEndingDates);
+                else // If a range has been selected
+                    if (calendar.getSelectedDates().size() > 1) {
+                        // Activate possibleBeginningDates again
+                        calendar.replaceActivatedDates(possibleBeginningDates);
+                        onRangeSelected(calendar.getSelectedDates());
+                    }
+            }
+
+            @Override
+            public void onDateUnselected(Date date) {
+            }
+        });
+
+        // When user tries to select a third date, deselect the previous range and let the user choose one of the possible beginning dates again.
+        calendar.setOnInvalidDateSelectedListener(new CalendarPickerView.OnInvalidDateSelectedListener() {
+            @Override
+            public void onInvalidDateSelected(Date date) {
+                // If a range has been selected and a third date was now clicked
+                if (calendar.getSelectedDates().size() > 1) {
+                    // Deselect all dates
+                    calendar.clearSelectedDates();
+                    // Activate possibleBeginningDates again
+                    calendar.replaceActivatedDates(possibleBeginningDates);
+
+                    if (possibleBeginningDates.contains(date))
+                        calendar.selectDate(date);
+                }
+            }
+        });
+
+        calendar.scrollToDate(new Date());
+
+
+        button.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                Toast.makeText(ActiveDatesRangePickerSampleActivity.this, "list " + calendar.getSelectedDates().toString(), Toast.LENGTH_LONG).show();
+            }
+        });
+
+        findViewById(R.id.get_calendar2).setVisibility(View.GONE);
+    }
+
+    void onRangeSelected(List<Date> selectedDates) {
+        Toast.makeText(ActiveDatesRangePickerSampleActivity.this, "A range has been selected. " + selectedDates.toString(), Toast.LENGTH_LONG).show();
+    }
+
+    private ArrayList<Date> getPossibleEndingDates() {
+        ArrayList<Date> possibleEndingDates = new ArrayList<>();
+        try {
+            SimpleDateFormat dateformat = new SimpleDateFormat("dd-MM-yyyy");
+
+            String strdate = "19-12-2019";
+            String strdate1 = "21-12-2019";
+            String strdate2 = "26-12-2019";
+            String strdate3 = "31-12-2019";
+
+            Date newdate = dateformat.parse(strdate);
+            Date newdate1 = dateformat.parse(strdate1);
+            Date newdate2 = dateformat.parse(strdate2);
+            Date newdate3 = dateformat.parse(strdate3);
+            possibleEndingDates.add(newdate);
+            possibleEndingDates.add(newdate1);
+            possibleEndingDates.add(newdate2);
+            possibleEndingDates.add(newdate3);
+        } catch (ParseException e) {
+            e.printStackTrace();
+        }
+        return possibleEndingDates;
+    }
+
+    private ArrayList<Date> getPossibleBeginningDates() {
+        ArrayList<Date> possibleBeginningDates = new ArrayList<>();
+        try {
+            SimpleDateFormat dateformat = new SimpleDateFormat("dd-MM-yyyy");
+
+            String strdate = "15-12-2019";
+            String strdate1 = "20-12-2019";
+            String strdate2 = "25-12-2019";
+            String strdate3 = "29-12-2019";
+
+            Date newdate = dateformat.parse(strdate);
+            Date newdate1 = dateformat.parse(strdate1);
+            Date newdate2 = dateformat.parse(strdate2);
+            Date newdate3 = dateformat.parse(strdate3);
+            possibleBeginningDates.add(newdate);
+            possibleBeginningDates.add(newdate1);
+            possibleBeginningDates.add(newdate2);
+            possibleBeginningDates.add(newdate3);
+        } catch (ParseException e) {
+            e.printStackTrace();
+        }
+        return possibleBeginningDates;
+    }
+}

app/src/main/java/com/savvi/rangepickersample/SampleActivity.java

@@ -1,5 +1,6 @@
 package com.savvi.rangepickersample;
 
+import android.content.Intent;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.Button;
@@ -104,6 +105,14 @@ public void onClick(View view) {
                 Toast.makeText(SampleActivity.this, "list " + calendar.getSelectedDates().toString(), Toast.LENGTH_LONG).show();
             }
         });
+
+        findViewById(R.id.get_calendar2).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                Intent intent = new Intent(view.getContext(), ActiveDatesRangePickerSampleActivity.class);
+                startActivity(intent);
+            }
+        });
     }
 
     private ArrayList<SubTitle> getSubTitles() {

app/src/main/res/layout/activity_sample.xml

@@ -31,4 +31,12 @@
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
+    <Button
+        android:id="@+id/get_calendar2"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="See Another Sample >"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
 </androidx.constraintlayout.widget.ConstraintLayout>