检查 imageView 是否有可绘制对象

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image没有任何drawable，image将是GONE，否则Visible。但是这段代码不起作用

Answer 1

您可以在图像视图上调用 getDrawable 函数并检查它是否不为空 -

Answer 2

if (image.getDrawable().getConstantState().equals
            (getResources().getDrawable(R.drawable.your_drawable).getConstantState()){//set here your drawable name(your_drawable)
            image.setVisibility(View.VISIBLE);
        }else{
            image.setVisibility(View.GONE);
        }

Answer 3

其实还有一种比较方式：

if(imageView.getDrawable().getConstantState().equals
            (getResources().getDrawable(/*Your drawable*/).getConstantState()))
imageView.setVisibility(View.VISIBLE);
        else
            imageView.setVisibility(View.GONE);

Answer 4

    if(imageview.getDrawable()==null)
    {
      //if Image View is Null 
    }

检查source

Answer 5

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);
    }
 }

检查 imageView 是否有可绘制对象

Check if the imageView has a drawable

android

imageview

android-drawable