通过反射将字段转换为Java中的数组类型

Question

I want to get private field of array of TextView via reflection, but I need to cast this field back to the array.

Field f= FieldUtils.getDeclaredField(ContentAdapter.ViewHolder.class, "button_massive", true);

Explicit cast like this TextView[] f1 = ((TextView[]) f) don't work.

Thank you in advance!

Answer 1

You're directly typecasting the Field type to array. That certainly won't work. What you want is to get the value of f , using Field#get() method. And then typecast that result to Object[] .

Field f= FieldUtils.getDeclaredField(ContentAdapter.ViewHolder.class, "button_massive", true);
Object[] result = (Object[]) f.get(obj);

If you really want TextView type array, then you've to create the array using and populate it from above Object[] :

TextView[] f1 = new TextView[result.length];
// Iterate over the `Object` array, and populate `f1` array.

I haven't tested this out, but it should be working.