Question

我有一个GridLayout，我想用java改变它。我有以下代码：

GridLayout gridLayout = (GridLayout) findViewById(R.id.gridLayout1);
GridLayout.LayoutParams param =new GridLayout.LayoutParams();
param.rightMargin = 5;
param.topMargin = 5;
gridLayout.setLayoutParams(param);

为什么会崩溃？

Answer 1

LayoutParams的类型由视图的父级决定。除非您的R.id.gridLayout1位于其他GridLayout内，否则您不应使用GridLayout.LayoutParams。

Answer 2

你可以这样做：

GridLayout gridLayout = (GridLayout) findViewById(R.id.gridLayout1);
        PARENT_LAYOUT.LayoutParams layoutParams = ( PARENT_LAYOUT.LayoutParams) gridLayout.getLayoutParams();
        layoutParams.rightMargin = 5;
        layoutParams.topMargin = 5;

并将RankENT_LAYOUT替换为LinearLayout或您用作Root布局的任何内容

GridLayout崩溃应用程序

2 个答案: