ReflectionUtil.java
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package com.metroapp.forum;
import android.text.TextUtils;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
/**
* 反射工具类
* 通过反射获得对应函数功能
*/
public class ReflectionUtil {
/**
* 通过类对象，运行指定方法
* @param obj 类对象
* @param methodName 方法名
* @param params 参数值
* @return 失败返回null
*/
public static Object invokeMethod(Object obj, String methodName, Object[] params) {
if (obj == null || TextUtils.isEmpty(methodName)) {
return null;
}
Class<?> clazz = obj.getClass();
try {
Class<?>[] paramTypes = null;
if (params != null) {
paramTypes = new Class[params.length];
for (int i = 0; i < params.length; ++i) {
paramTypes[i] = params[i].getClass();
}
}
Method method = clazz.getMethod(methodName, paramTypes);
method.setAccessible(true);
return method.invoke(obj, params);
} catch (NoSuchMethodException e) {
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public static Object getFieldValue(Object obj, String fieldName) {
if (obj == null || TextUtils.isEmpty(fieldName)) {
return null;
}
Class<?> clazz = obj.getClass();
while (clazz != Object.class) {
try {
Field field = clazz.getDeclaredField(fieldName);
field.setAccessible(true);
return field.get(obj);
} catch (Exception e) {
}
clazz = clazz.getSuperclass();
}
return null;
}
public static void setFieldValue(Object obj, String fieldName, Object value) {
if (obj == null || TextUtils.isEmpty(fieldName)) {
return;
}
Class<?> clazz = obj.getClass();
while (clazz != Object.class) {
try {
Field field = clazz.getDeclaredField(fieldName);
field.setAccessible(true);
field.set(obj, value);
return;
} catch (Exception e) {
}
clazz = clazz.getSuperclass();
}
}
}