am fe46c29c: Merge "Set preloading for the WidgetTray recycler view. b/20339302" into ub-launcher3-burnaby
* commit 'fe46c29ca388b9547243aff767a89112cef63083':
Set preloading for the WidgetTray recycler view. b/20339302
diff --git a/src/com/android/launcher3/widget/WidgetsContainerView.java b/src/com/android/launcher3/widget/WidgetsContainerView.java
index 8090c88..22e29f3 100644
--- a/src/com/android/launcher3/widget/WidgetsContainerView.java
+++ b/src/com/android/launcher3/widget/WidgetsContainerView.java
@@ -24,6 +24,7 @@
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 @@
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 @@
}
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());
}