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                                            JingHaifeng

Nullpointer exception while Dragging and Dropping

I fixed it and pulled.

getViewForId() Often returns null

I found that it would not crash if the layout_height of DynamicGridView was set wrap_content.

getViewForId() Often returns null

Finally,I found the error method: ``` private Point getColumnAndRowForView(View view) { int pos = getPositionForView(view); int columns = getColumnCount(); int column = pos % columns; int row = pos /...