旋转的ImageView在Android的＆LT; API等级11 [英] Rotating ImageView in Android < API Level 11

问题描述

因此​​，在API级别11谷歌推出来旋转ImageView的能力（耶，之后便推出动画这样的旋转，耶智能思维的可能性，耶！）<​​/ P>

不过，我应该如何去旋转使用，例如一个ImageView的API级别8？我不能使用setRotation（）如上述。

解决方案

我开始创建位图和旋转画布/矩阵，但是这并不是一个很好的解决方案。终于结束了刚刚换了绘制，如果条件得到满足。我应该说这是在细胞绘画时重复使用的ExpandableListView。

 如果（isExpanded）{
        ImageView的观点=（ImageView的）convertView.findViewById（R.id.ImageView）;
        view.setImageResource（R.drawable.quickactions_button_normal_down）;
    }

    如果（！isExpanded）{
        ImageView的观点=（ImageView的）convertView.findViewById（R.id.ImageView）;
        view.setImageResource（R.drawable.quickactions_button_normal）;
    }
 

我不是通常是一个Android开发者，但我真的很惊讶，这是可能的动画旋转，而不是静态地设置绘制的旋转。逻辑上的第一个是第二，而不是周围的其他方式的一个子集

So in API Level 11 Google introduced the ability to rotate an ImageView (Yay, after they introduced the possibility to Animate such a rotation, yay smart thinking, yay!)

But how should I go about to rotate an ImageView using e.g. API level 8? I can't use setRotation() as described above.

解决方案

I started with creating BitMap and rotating the canvas/matrix, however this was not a good solution. Finally ended up just swapping the drawable if conditions are met. I should say this is an ExpandableListView where cells are reused when drawing.

if (isExpanded) {
        ImageView view = (ImageView) convertView.findViewById(R.id.ImageView);
        view.setImageResource(R.drawable.quickactions_button_normal_down);
    }

    if (!isExpanded) {
        ImageView view = (ImageView) convertView.findViewById(R.id.ImageView);          
        view.setImageResource(R.drawable.quickactions_button_normal);
    }

I'm not usually a Android developer but I'm really amazed that it is possible to animate a rotation, but not statically set the rotation of a drawable. Logically the first is a subset of the second and not the other way around.

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