在Fragment界面中,设置两个图片一致如下:
默认设置图片为:
binding.ivArrow.setImageResource(R.drawable.icon_down);
先获取默认图片,再和其它两张图片做对比,然后处理业务逻辑:
Drawable.ConstantState ivArrow = binding.ivArrow.getDrawable().getCurrent().getConstantState(); Drawable.ConstantState icon_up = getDrawable(R.drawable.icon_up).getConstantState(); Drawable.ConstantState icon_down = getDrawable(R.drawable.icon_down).getConstantState(); Log.e("--->ivArrow$", "$" + ivArrow); Log.e("--->icon_up$", "$" + icon_up); Log.e("--->icon_down", "$" + icon_down); if (ivArrow.equals(icon_up)) { binding.ivArrow.setImageResource(R.drawable.icon_down); } else if (ivArrow.equals(icon_down)) { binding.ivArrow.setImageResource(R.drawable.icon_up); }
打印结果如下:
显然通过日志发现,每个图片的资源都不一致,这是为什么,通过点击getDrawable查看源码发现
这个不是我们想要的,我们要的是id,怎么解决呢,因为是在Fragment中,所以要加上 getActivity()
设置完后,看下效果
完整代码如下:
Drawable.ConstantState ivArrow = binding.ivArrow.getDrawable().getCurrent().getConstantState(); Drawable.ConstantState icon_up = getActivity().getDrawable(R.drawable.icon_up).getConstantState(); Drawable.ConstantState icon_down = getActivity().getDrawable(R.drawable.icon_down).getConstantState(); Log.e("--->ivArrow$", "$" + ivArrow); Log.e("--->icon_up$", "$" + icon_up); Log.e("--->icon_down", "$" + icon_down); if (ivArrow.equals(icon_up)) { binding.ivArrow.setImageResource(R.drawable.icon_down); } else if (ivArrow.equals(icon_down)) { binding.ivArrow.setImageResource(R.drawable.icon_up); }