Allow determining # of rows/columns for All Apps and Customize at run time

src/com/android/launcher2/CustomizePagedView.java

@@ -54,6 +54,7 @@ import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
+import android.view.View.MeasureSpec;
 import android.view.animation.DecelerateInterpolator;
 import android.view.animation.LinearInterpolator;
 import android.widget.Checkable;
@@ -124,6 +125,8 @@ public class CustomizePagedView extends PagedViewWithDraggableItems
     private final Canvas mCanvas = new Canvas();
     private final LayoutInflater mInflater;
 
+    private boolean mFirstMeasure = true;
+
     private final float mTmpFloatPos[] = new float[2];
     private final float ANIMATION_SCALE = 0.5f;
 
@@ -190,6 +193,31 @@ public class CustomizePagedView extends PagedViewWithDraggableItems
         mCenterPagesVertically = false;
     }
 
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+
+        final int widthSize = MeasureSpec.getSize(widthMeasureSpec);
+        final int heightSize = MeasureSpec.getSize(heightMeasureSpec);
+
+        if (mFirstMeasure) {
+            mFirstMeasure = false;
+
+            // TODO: actually calculate mCellCountX/mCellCountY as some function of
+            // widthSize and heightSize
+            //mCellCountX = ?
+            //mCellCountY = ?
+
+            // Since mCellCountX/mCellCountY changed, we need to update the pages
+            invalidatePageData();
+
+            // Create a dummy page and set it up to find out the content width (used by our parent)
+            PagedViewCellLayout layout = new PagedViewCellLayout(getContext());
+            setupPage(layout);
+            mPageContentWidth = layout.getContentWidth();
+        }
+    }
+
     public void setLauncher(Launcher launcher) {
         Context context = getContext();
         mLauncher = launcher;
@@ -1093,6 +1121,11 @@ public class CustomizePagedView extends PagedViewWithDraggableItems
 
     @Override
     public void syncPages() {
+        if (mFirstMeasure) {
+            // We don't know our size yet, which means we haven't calculated cell count x/y;
+            // onMeasure will call us once we figure out our size
+            return;
+        }
         boolean enforceMinimumPagedWidths = false;
         boolean centerPagedViewCellLayouts = false;
         switch (mCustomizationType) {