单选按钮drawable top没有显示setCompoundDrawablesWithIntrinsicBounds（）;并使用setButtonDrawable（）;显示在错误的位置

Question

我在设置中将按钮设置为可绘制的底部。在java中，我使用setCompoundDrawablesWithIntrinsicBounds(0,R.drawable.wrong,0,R.drawable.check);方法设置了drawable top，并且没有显示drawable top。

所以我尝试了setButtonDrawable();的不同方法，它不会改变单选按钮drawablebottom，这很好，它将Drawable设置在Button旁边。

如何将其位置改为顶部？

Answer 1

您可以重复使用之前的drawable来保留drawable底部：

Drawable drawableTop = ContextCompat.getDrawable(getContext(),R.drawable.wrong);
//Drawable drawableBottom = ContextCompat.getDrawable(getContext(),R.drawable.check);

Drawable[] drawables = button.getCompoundDrawables();
// left top right bottom
button.setCompoundDrawablesWithIntrinsicBounds(drawables[0], drawableTop, drawables[2], drawables[3]);

或者您可以尝试以下方法：

Drawable drawableTop = ContextCompat.getDrawable(getContext(),R.drawable.wrong);
Drawable drawableBottom = ContextCompat.getDrawable(getContext(),R.drawable.check);

int topHeight = drawableTop.getIntrinsicHeight(); 
int topWidth = drawableTop.getIntrinsicWidth();   
drawableTop.setBounds(0, 0, topWidth, topHeight);

topHeight = drawableBottom.getIntrinsicHeight(); 
topWidth = drawableBottom.getIntrinsicWidth();   
drawableBottom.setBounds(0, 0, topWidth, topHeight);

button.setCompoundDrawables(null, drawableTop, null, drawableBottom);