Question

如何设置图像progragmaticall的宽度？

这是我的代码，

    txtone = (ImageView)findViewById(R.id.imageView);
    txttwo = (ImageView)findViewById(R.id.imageView2);
    height = metrics.heightPixels;
    width = metrics.widthPixels;
    if (height == 800 && width == 1217) {
    int a = txtone.getMeasuredWidth();
    txtone.getLayoutParams().width = 280;
    txttwo.getLayoutParams().width = 280;
    txtthree.getLayoutParams().width = 280;
    txtone.requestLayout();
    txttwo.requestLayout();
    txtthree.requestLayout();

Answer 1

在实际初始化之前，您尝试使用txttwo txtthree之一。当你打电话

时，其中一个是null

txttwo.getLayoutParams().width = 280;
txtthree.getLayoutParams().width = 280;

至于您的代码，您没有初始化txtthree

如何解决null对象引用？

1 个答案: