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fix of unnecessary moves of adapter on it's items changes

This commit is contained in:
Gavriil Sitnikov 2017-06-08 14:20:15 +03:00
parent 1951c44ef1
commit c8fc0fe745
1 changed files with 17 additions and 3 deletions
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20
src/main/java/ru/touchin/templates/calendar/CalendarRecyclerView.java
View File

@ -23,6 +23,7 @@ import android.content.Context;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.util.AttributeSet;
import ru.touchin.roboswag.core.log.Lc;
@ -47,9 +48,22 @@ public class CalendarRecyclerView extends RecyclerView {
public CalendarRecyclerView(@NonNull final Context context, @Nullable final AttributeSet attrs, final int defStyle) {
super(context, attrs, defStyle);
getRecycledViewPool().setMaxRecycledViews(CalendarAdapter.HEADER_ITEM_TYPE, HEADER_MAX_ELEMENTS_IN_A_ROW * 3);
getRecycledViewPool().setMaxRecycledViews(CalendarAdapter.EMPTY_ITEM_TYPE, EMPTY_MAX_ELEMENTS_IN_A_ROW * 3);
getRecycledViewPool().setMaxRecycledViews(CalendarAdapter.DAY_ITEM_TYPE, DAY_MAX_ELEMENTS_IN_A_ROW * 3);
setupCacheForMonthsOnScreenCount(3);
final StaggeredGridLayoutManager layoutManager = new StaggeredGridLayoutManager(7, StaggeredGridLayoutManager.VERTICAL);
layoutManager.setGapStrategy(StaggeredGridLayoutManager.GAP_HANDLING_NONE);
setItemAnimator(null);
}
/**
* Setups recycler cache for smooth scroll without lagging based on month that could be displayed on screen.
*
* @param maxMonthOnScreen Maximum months count on screen.
*/
public void setupCacheForMonthsOnScreenCount(final int maxMonthOnScreen) {
getRecycledViewPool().setMaxRecycledViews(CalendarAdapter.HEADER_ITEM_TYPE, HEADER_MAX_ELEMENTS_IN_A_ROW * (maxMonthOnScreen + 1));
getRecycledViewPool().setMaxRecycledViews(CalendarAdapter.EMPTY_ITEM_TYPE, EMPTY_MAX_ELEMENTS_IN_A_ROW * (maxMonthOnScreen * 2 + 1));
// we need such much views to prevent cache/gap animations of StaggeredGridLayoutManager
getRecycledViewPool().setMaxRecycledViews(CalendarAdapter.DAY_ITEM_TYPE, DAY_MAX_ELEMENTS_IN_A_ROW * (maxMonthOnScreen * 5 + 1));
setItemViewCacheSize(0);
}