public class ReflectUtil {
private ReflectUtil() {
}
/**
* 直接设置对象属性值,无视private/protected修饰符,不经过setter函数.
*/
public static void setFieldValue(final Object object, final String fieldName, final Object value) {
Field field = getDeclaredField(object, fieldName);
if (field == null)
throw new IllegalArgumentException("Could not find field [" + fieldName + "] on target [" + object + "]");
makeAccessible(field);
try {
field.set(object, value);
} catch (IllegalAccessException e) {
Log.e("zbkc", "", e);
}
}
/**
* 循环向上转型,获取对象的DeclaredField.
*/
protected static Field getDeclaredField(final Object object, final String fieldName) {
return getDeclaredField(object.getClass(), fieldName);
}
/**
* 循环向上转型,获取类的DeclaredField.
*/
@SuppressWarnings("unchecked")
protected static Field getDeclaredField(final Class clazz, final String fieldName) {
for (Class superClass = clazz; superClass != Object.class; superClass = superClass.getSuperclass()) {
try {
return superClass.getDeclaredField(fieldName);
} catch (NoSuchFieldException e) {
// Field不在当前类定义,继续向上转型
}
}
return null;
}
/**
* 强制转换fileld可访问.
*/
protected static void makeAccessible(Field field) {
if (!Modifier.isPublic(field.getModifiers()) || !Modifier.isPublic(field.getDeclaringClass().getModifiers())) {
field.setAccessible(true);
}
}
}
我们写一个通用的类来进行反射操作：
比如：
ReflectUtil.setFieldValue(mProgressBar,"mOnlyIndeterminate",newBoolean(false));
如果觉得《java 反射 protected_Java反射机制设置对象里的private protected属性值》对你有帮助，请点赞、收藏，并留下你的观点哦！
