allprojects {
    repositories {
        ...
        maven { url 'https://jitpack.io' }
    }
}
	
dependencies {
    compile 'com.github.sayemkcn:aDateSwitcher:rc~1.1'
}

<xyz.rimon.adateswitcher.DateSwitcher
    android:id="@+id/mDateSwitcher"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:buttonBackgroundColor="@color/colorAccent"
    app:buttonTextColor="@color/white"
    app:textBackgroundColor="@android:color/darker_gray"
    app:textColor="@color/white"
    app:textSize="18sp" />

DateSwitcher mDateSwitcher = findViewById(R.id.mDateSwitcher);

// set listener
this.mDateSwitcher.setOnDateChangeListener(new DateSwitcher.OnDateChangeListener() {
     @Override
     public void onChange(Map<DateSwitcher.DateRange, Date> dateRange) {

         Date topDate = dateRange.get(DateSwitcher.DateRange.TOP_DATE);
         Date bottomDate = dateRange.get(DateSwitcher.DateRange.BOTTOM_DATE);
         
         Log.i("DATE_RANGE","TOP: " + topDate.toString()
                 + "\nBOTTOM: " + bottomDate.toString());
     }
 });

this.wDateSwitcher.setType(DateSwitcher.Type.WEEK);