android - 检查imageView是否有drawable

Question

if (image.getDrawable().getConstantState().equals(getResources().getDrawable(0).getConstantState())){
            image.setVisibility(View.GONE);
        }else{
            image.setVisibility(View.VISIBLE);
        }

也就是说，如果图像没有任何可绘制对象，则图像将消失，否则可见。但这段代码不起作用

Answer 1

Try below may be it works for you(It's work for me)

if(android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
    if (image.getDrawable().getConstantState().equals(image.getContext().getDrawable(R.drawable.shadow_round_white).getConstantState())){

       image.setVisibility(View.GONE);
    }
    else{
       image.setVisibility(View.VISIBLE);
    }

 }
else {
    if (image.getDrawable().getConstantState().equals(getResources().getDrawable(R.drawable.shadow_round_white).getConstantState())){
       image.setVisibility(View.GONE);
    }

    else{
       image.setVisibility(View.VISIBLE);
    }
 }