Android实现九宫格（GridView中各项平分空间）的方法

import android.content.Context; 
import android.util.AttributeSet; 
import android.view.View; 
import android.widget.BaseAdapter; 
import android.widget.Button; 
import android.widget.TableLayout; 
import android.widget.TableRow; 
/** 
 * AdvancedGridView 
 * @author RobinTang 
 * @time 2012-10-15 
 */ 
public class AdvancedGridView extends TableLayout { 
// private static final String tag = "AdvancedGridView"; 
  private int rowNum = 0; // row number 
  private int colNum = 0; // col number 
  private BaseAdapter adapter = null;  
  private Context context = null; 
  public AdvancedGridView(Context context) { 
    super(context); 
    initThis(context, null); 
  } 
  public AdvancedGridView(Context context, AttributeSet attrs) { 
    super(context, attrs); 
    initThis(context, attrs); 
  } 
  private void initThis(Context context, AttributeSet attrs) { 
    this.context = context; 
    if (this.getTag() != null) { 
      String atb = (String) this.getTag(); 
      int ix = atb.indexOf(','); 
      if (ix > 0) { 
        rowNum = Integer.parseInt(atb.substring(0, ix)); 
        colNum = Integer.parseInt(atb.substring(ix+1, atb.length())); 
      } 
    } 
    if (rowNum <= 0) 
      rowNum = 3; 
    if (colNum <= 0) 
      colNum = 3; 
    if(this.isInEditMode()){ 
      this.removeAllViews(); 
      for(int y=0; y<rowNum; ++y){ 
        TableRow row = new TableRow(context); 
        row.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT, 1.0f)); 
        for(int x=0; x<colNum; ++x){ 
          View button = new Button(context); 
          row.addView(button, new TableRow.LayoutParams (LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, 1.0f)); 
        } 
        this.addView(row); 
      } 
    } 
  } 
  public BaseAdapter getAdapter() { 
    return adapter; 
  } 
  public void setAdapter(BaseAdapter adapter) { 
    if(adapter != null){ 
      if(adapter.getCount() < this.rowNum*this.colNum){ 
        throw new IllegalArgumentException("The view count of adapter is less than this gridview's items"); 
      } 
      this.removeAllViews(); 
      for(int y=0; y<rowNum; ++y){ 
        TableRow row = new TableRow(context); 
        row.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT, 1.0f)); 
        for(int x=0; x<colNum; ++x){ 
          View view = adapter.getView(y*colNum+x, this, row); 
          row.addView(view, new TableRow.LayoutParams (LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, 1.0f)); 
        } 
        this.addView(row); 
      } 
    } 
    this.adapter = adapter; 
  } 
  public int getRowNum() { 
    return rowNum; 
  } 
  public void setRowNum(int rowNum) { 
    this.rowNum = rowNum; 
  } 
  public int getColNum() { 
    return colNum; 
  } 
  public void setColNum(int colNum) { 
    this.colNum = colNum; 
  } 
}