如何以编程方式将android：layout_columnWeight =“ 1”设置为android支持v7 Gridlayout中的元素

我正在尝试以编程方式构建包含2列的GirdLayout，并且我希望这些列的宽度相等，设置为屏幕宽度的一半。

我发现您可以从API 21或支持v7 GirdLayout视图开始执行此操作。我看到了使用android：layout_columnWeight =“ 1”来执行此操作的示例。但是我找不到如何以编程方式执行此操作。

谁能帮我解决这个问题？

package com.tunify.v3.component;

import java.util.ArrayList;

import android.support.v7.widget.GridLayout;
import android.util.DisplayMetrics;
import android.util.TypedValue;
import android.view.ViewGroup;

import com.tunify.asme.data.ChangeableSelectionParameterValue;

public class ChangeableSelectionParameters extends GridLayout{

//private ArrayList<ChangeableSelectionParameterView> selectionParameterViews;
private ArrayList<ChangeableSelectionParameterValue> selectionParameterValues;

private static final int ITEM_PADDING_LEFT_DP = 0;
private static final int ITEM_PADDING_RIGHT_DP = 0;
private static final int ITEM_PADDING_TOP_DP = 0;
private static final int ITEM_PADDING_BOTTOM_DP = 0;

//private static final int MUSICCOLLECTION_DISPLAY_TEXT_SIZE_SP = 15;


public ChangeableSelectionParameters(android.content.Context context, ArrayList<ChangeableSelectionParameterValue> selectionParameterValues) {
    super(context);

    this.selectionParameterValues = selectionParameterValues;

    initializeLayoutBasics(context);
    initializeComponents();
}

private void initializeLayoutBasics(android.content.Context context) {
    setOrientation(VERTICAL);
    setColumnCount(2);
    setRowCount((int)Math.ceil(selectionParameterValues.size()/2.0));

    int width = ViewGroup.LayoutParams.MATCH_PARENT;
    int height = ViewGroup.LayoutParams.WRAP_CONTENT;
    android.view.ViewGroup.LayoutParams layoutParams = new android.view.ViewGroup.LayoutParams(width, height);
    this.setLayoutParams(layoutParams);

    DisplayMetrics metrics = getResources().getDisplayMetrics();

    int paddingLeftPx = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, ITEM_PADDING_LEFT_DP, metrics);
    int paddingRightPx = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, ITEM_PADDING_RIGHT_DP, metrics);
    int paddingTopPx = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, ITEM_PADDING_TOP_DP, metrics);
    int paddingBottomPx = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, ITEM_PADDING_BOTTOM_DP, metrics);
    setPadding(paddingLeftPx, paddingTopPx, paddingRightPx, paddingBottomPx);

}

private void initializeComponents() {

    for(ChangeableSelectionParameterValue param : this.selectionParameterValues){
        ChangeableSelectionParameterView v = new ChangeableSelectionParameterView(getContext(), param);
        //TODO set views layout column weight to 1
        this.addView(v);
    }
 }
}

解决方案：

 GridLayout.LayoutParams parem = new LayoutParams(GridLayout.spec(GridLayout.UNDEFINED, 1f),      GridLayout.spec(GridLayout.UNDEFINED, 1f));
 v.setLayoutParams(parem);