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Commit fe46c29c authored by Hyunyoung Song's avatar Hyunyoung Song Committed by Android (Google) Code Review
Browse files

Merge "Set preloading for the WidgetTray recycler view. b/20339302" into ub-launcher3-burnaby

parents 65832b62 e8093320

src/com/android/launcher3/widget/WidgetsContainerView.java

+12 −1
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ import android.graphics.Rect; 
import android.graphics.drawable.Drawable;

import android.support.v7.widget.LinearLayoutManager;

import android.support.v7.widget.RecyclerView;

import android.support.v7.widget.RecyclerView.State;

import android.util.AttributeSet;

import android.util.Log;

import android.view.View;
@@ -62,6 +63,9 @@ public class WidgetsContainerView extends FrameLayout implements Insettable, 


    private static final int SPRING_MODE_DELAY_MS = 150;



    /* Coefficient multiplied to the screen height for preloading widgets. */

    private static final int PRELOAD_SCREEN_HEIGHT_MULTIPLE = 1;



    /* Global instances that are used inside this container. */

    private Launcher mLauncher;

    private DragController mDragController;
@@ -114,8 +118,15 @@ public class WidgetsContainerView extends FrameLayout implements Insettable, 
        }

        mView = (RecyclerView) findViewById(R.id.widgets_list_view);

        mView.setAdapter(mAdapter);

        mView.setLayoutManager(new LinearLayoutManager(getContext()));



        // This extends the layout space so that preloading happen for the {@link RecyclerView}

        mView.setLayoutManager(new LinearLayoutManager(getContext()) {

            @Override

            protected int getExtraLayoutSpace(State state) {

                return super.getExtraLayoutSpace(state)

                        + WidgetsContainerView.this.getHeight() * PRELOAD_SCREEN_HEIGHT_MULTIPLE;

            }

        });

        mPadding.set(getPaddingLeft(), getPaddingTop(), getPaddingRight(),

                getPaddingBottom());

    }