Android Launcher3去掉所有應用列表，橫屏時左右兩側的留空

         // Layout AllApps
        AppsCustomizeTabHost host = (AppsCustomizeTabHost)
                launcher.findViewById(R.id.apps_customize_pane);
        if (host != null) {
            // Center the all apps page indicator
            int pageIndicatorHeight = (int) (pageIndicatorHeightPx * Math.min(1f,
                    (allAppsIconSizePx / DynamicGrid.DEFAULT_ICON_SIZE_PX)));
            pageIndicator = host.findViewById(R.id.apps_customize_page_indicator);
            if (pageIndicator != null) {
                lp = (FrameLayout.LayoutParams) pageIndicator.getLayoutParams();
                lp.gravity = Gravity.CENTER_HORIZONTAL | Gravity.BOTTOM;
                lp.width = LayoutParams.WRAP_CONTENT;
                lp.height = pageIndicatorHeight;
                pageIndicator.setLayoutParams(lp);
            }


        AppsCustomizePagedView pagedView = (AppsCustomizePagedView)
                host.findViewById(R.id.apps_customize_pane_content);
        padding = new Rect();
        if (pagedView != null) {
            // Constrain the dimensions of all apps so that it does not span the full width
                // TChip ZJ Add START: 去掉所有應用列表，橫屏時左右兩側的Margin
            int paddingLR = (availableWidthPx - (allAppsCellWidthPx * allAppsNumCols)) /
                    (2 * (allAppsNumCols + 1));
            int paddingTB = (availableHeightPx - (allAppsCellHeightPx * allAppsNumRows)) /
                    (2 * (allAppsNumRows + 1));
            paddingLR = Math.min(paddingLR, (int)((paddingLR + paddingTB) * 0.75f));
            paddingTB = Math.min(paddingTB, (int)((paddingLR + paddingTB) * 0.75f));
                paddingLR = (int)(paddingLR * 0.75f);
                paddingTB = (int)(paddingTB * 0.75f);
                // TChip ZJ Add END

                // TChip ZJ Minus START: 去掉所有應用列表，橫屏時左右兩側的Margin
                /*
                int paddingLR = 2;
                int paddingTB = 2;
                */
                // TChip ZJ Minus END
            int maxAllAppsWidth = (allAppsNumCols * (allAppsCellWidthPx + 2 * paddingLR));
            int gridPaddingLR = (availableWidthPx - maxAllAppsWidth) / 4;
            // Only adjust the side paddings on landscape phones, or tablets
            if ((isTablet() || isLandscape) && gridPaddingLR > (allAppsCellWidthPx / 4)) {
                padding.left = padding.right = gridPaddingLR;
            }
            // The icons are centered, so we can't just offset by the page indicator height
            // because the empty space will actually be pageIndicatorHeight + paddingTB
            padding.bottom = Math.max(0, pageIndicatorHeight - paddingTB);
            pagedView.setAllAppsPadding(padding);
            pagedView.setWidgetsPageIndicatorPadding(pageIndicatorHeight);
        }
    }




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