update GridView Layout Params - Android User Interface

Android examples for User Interface:GridView

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Description

update GridView Layout Params

Demo Code


import android.util.SparseIntArray;
import android.view.View;
import android.view.ViewGroup;

public class Main{
    /*from w w w  .  java 2 s . c  om*/
    static SparseIntArray mGvWidth = new SparseIntArray();
    
    public static void updateGridViewLayoutParams(MyGirdView gridView,
            int maxColumn) {
        int childs = gridView.getAdapter().getCount();

        if (childs > 0) {
            int columns = childs < maxColumn ? childs % maxColumn
                    : maxColumn;
            gridView.setNumColumns(columns);
            int width = 0;
            int cacheWidth = mGvWidth.get(columns);
            if (cacheWidth != 0) {
                width = cacheWidth;
            } else { // gridview, item?3?item?;
                // ?3?child?3?child? (?3)
                int rowCounts = childs < maxColumn ? childs : maxColumn;
                for (int i = 0; i < rowCounts; i++) {
                    View childView = gridView.getAdapter().getView(i, null,
                            gridView);
                    childView.measure(0, 0);
                    width += childView.getMeasuredWidth();
                }
            }

            ViewGroup.LayoutParams params = gridView.getLayoutParams();
            params.width = width;
            gridView.setLayoutParams(params);
            if (mGvWidth.get(columns) == 0) {
                mGvWidth.append(columns, width);
            }
        }
    }
}

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