1、 AppsCustomizePagedView.java修改两处如下：
1) private void setupPage(AppsCustomizeCellLayout layout) {
layout.setGridSize(mCellCountX, mCellCountY);
// Note: We force a measure here to get around the fact that when we do layout calculations
// immediately after syncing, we don‘t have a proper width. That said, we already know the
// expected page width, so we can actually optimize by hiding all the TextView-based
// children that are expensive to measure, and let that happen naturally later.
setVisibilityOnChildren(layout, View.GONE);
int widthSpec = MeasureSpec.makeMeasureSpec(mContentWidth, MeasureSpec.AT_MOST);
int heightSpec = MeasureSpec.makeMeasureSpec(mContentHeight, MeasureSpec.AT_MOST);
layout.measure(widthSpec, heightSpec);
if(!Launcher.DISABLE_APPLIST_WHITE_BG) {//add
Drawable bg = getContext().getResources().getDrawable(R.drawable.quantum_panel);
if (bg != null) {
bg.setAlpha(mPageBackgroundsVisible ? 255: 0);
layout.setBackground(bg);
}
} else {//add
layout.setBackground(null);//add
}//add
setVisibilityOnChildren(layout, View.VISIBLE);
}
