在开发组件化项目中,遇到一个这样的问题,两个不同的Module相互之间没有任何直接依赖关系,现在需求是需要在Module_A中调用Module_B中的某个类的方法,以下为解决此问题的方法;
采用的核心技术:路由、反射;
解决问题的过程,首先将需要调用的类通过路由注册,注册到路由中心,这里讲Module_B中的类注册到了路由中心,在Module_A中首先先通过路由中心获取到已经注册了的Module_B的类,获取到Class后通过反射原理获取当前对象实例,然后继续通过反射调用调用当前实例对象的对应方法(支持无参方法及有参方法),至此调用方法已实现,具体示例如下:
1、路由注册工具类:
/**
* Class类路由注册工具类
* Created by sun.li on 2018/7/6.
*
* @author sun.li
*/
public class RouterClassUtil implements RouterInter<Object,Class<? extends Object>>{
private ConcurrentHashMap<String, Class<? extends Object>> mClassZ = new ConcurrentHashMap();
private ConcurrentHashMap<String, Object> mClassA = new ConcurrentHashMap();
private static RouterClassUtil mInstance;
private RouterClassUtil() {
}
public static RouterClassUtil getInstance() {
if(null == mInstance) {
synchronized(RouterActivity.class) {
if(null == mInstance) {
mInstance = new RouterClassUtil();
}
}
}
return mInstance;
}
@Override
public void routerT(String key, Object obj) {
Object cacheActivity = this.mClassA.get(key);
if(null == cacheActivity || obj != cacheActivity) {
this.mClassA.put(key, obj);
}
}
@Override
public Object invokT(String key) {
return this.mClassA.get(key);
}
@Override
public void routerV(String key, Class<?> aClass) {
Class cacheClass = this.mClassZ.get(key);
if(null == cacheClass || aClass != cacheClass) {
this.mClassZ.put(key, aClass);
}
}
@Override
public Class<? extends Object> invokV(String key) {
return this.mClassZ.get(key);
}
/** 获取Object对象*/
public Object getObject(String key){
Object object = invokT(key);
if(null == object){
try {
Class<? extends Object> aClass = invokV(RouterHttpClassKey.KEY_MODULE_HTTP_HTTPUTIL);
if(null != aClass) {
object = aClass.newInstance();//通过Class对象实例化当前对象
}
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}
return object;
}
}
2、路由对应Class配置类(此处声明具体的Class类路径,注册时通过反射原理获取对应的Class):
/**
* 路由跳转Class对应key配置类
* Created by sun.li on 2018/7/6.
*
* @author sun.li
*/
public class RouterHttpClassKey {
/**
* HttpUtil
*/
public static final String KEY_MODULE_HTTP_HTTPUTIL = "**.**.**.util.HttpLibUtil";
}
3、路由注册:
RouterClassUtil.getInstance().routerV(value,correspondingClass);
4、路由调用获取当前的对象并且通过反射调用对应的方法:
4.1、无参方法调用:
/** 调用Module中的对应无参方法*/
public void callMethodInModule(@NonNull String className,@NonNull String methodName){
Object object = RouterClassUtil.getInstance().getObject(className);
if (null != object) {
Method method = getMethod(object,methodName,null);
if(null!=method){
try {
//执行对象object中通过反射获取的方法
method.invoke(object);
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}
}
}
4.2、有参方法调用(发射调用多参数时因为方法限制,还未想到好的方式):
/**
* 公共网络请求参数对象
* Created by sun.li on 2018/7/6.
*
* @author sun.li
*/
public class BaseObjectParameterBean {
public BaseObjectParameterBean(){
}
public BaseObjectParameterBean(Class parameterType, Object parameterValue){
setParameterType(parameterType);
setParameterValue(parameterValue);
}
/** 参数值*/
private Object parameterValue;
/** 参数类型*/
private Class parameterType;
public Object getParameterValue() {
return parameterValue;
}
public void setParameterValue(Object parameterValue) {
this.parameterValue = parameterValue;
}
public Class getParameterType() {
return parameterType;
}
public void setParameterType(Class parameterType) {
this.parameterType = parameterType;
}
}
/** 调用Module中的对应有参方法*/
public void callMethodInModule(@NonNull String className, @NonNull String methodName, List<BaseObjectParameterBean> mList){
if(null!=mList && mList.size()>0){
/* 参数类型集合*/
List<Class> classList = new ArrayList<>();
/* 参数值集合*/
List<Object> objectList = new ArrayList<>();
for (int i = 0; i < mList.size(); i++) {
BaseObjectParameterBean baseHttpRequestParameterBean = mList.get(i);
if(null != baseHttpRequestParameterBean){
if(null != baseHttpRequestParameterBean.getParameterValue() && null != baseHttpRequestParameterBean.getParameterType()){
classList.add(baseHttpRequestParameterBean.getParameterType());
objectList.add(baseHttpRequestParameterBean.getParameterValue());
}
}
}
if(classList.size()>0 && objectList.size()>0){
Object object = RouterClassUtil.getInstance().getObject(className);
if (null != object) {
Method method = getMethod(object,methodName,classList);
if(null!=method){
try {
//执行对象object中通过反射获取的方法
Object[] mObjectList = new Object[objectList.size()];
for (int i = 0; i < objectList.size(); i++) {
if(null != objectList.get(i)){
mObjectList[i] = objectList.get(i);
}
}
method.invoke(object,mObjectList);
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}
}
}
}else{
callMethodInModule(className,methodName);
}
}
private Method getMethod(Object object, @NonNull String methodName, List<Class> mList){
if(null == object || TextUtils.isEmpty(methodName)){
return null;
}
Method method = null;
try {
if(null != mList && mList.size()>0){
// 父类对象调用子类有参数的方法(反射原理)
Class[] mClassList = new Class[mList.size()];
for (int i = 0; i < mList.size(); i++) {
if(null != mList.get(i)){
mClassList[i] = mList.get(i);
}
}
method = object.getClass().getMethod(methodName,mClassList);
}else{
method = object.getClass().getMethod(methodName);// 父类对象调用子类方法(反射原理)
}
} catch (NoSuchMethodException e) {
e.printStackTrace();
}
return method;
}
4.3、调用示例:
BaseObjectUtil.getInstance().callMethodInModule(RouterHttpClassKey.KEY_MODULE_HTTP_HTTPUTIL,"test");
List<BaseHttpRequestParameterBean> beans = new ArrayList<>();
beans.add(new BaseHttpRequestParameterBean(String.class,"哈哈"));
beans.add(new BaseHttpRequestParameterBean(Integer.class,88));
BaseHttpRequestParameterBean baseHttpRequestParameterBean = new BaseHttpRequestParameterBean();
baseHttpRequestParameterBean.setParameterType(Integer.class);
beans.add(baseHttpRequestParameterBean);
BaseObjectUtil.getInstance().callMethodInModule(RouterHttpClassKey.KEY_MODULE_HTTP_HTTPUTIL,"test2",beans);
调用结果:
07-06 16:07:29.862 10329-10329/cc.**.** E/HttpLibUtil:: 我是HttpLib中的test方法
07-06 16:07:29.862 10329-10329/cc.**.** E/HttpLibUtil:: 我是HttpLib中的test2方法,str=哈哈 i=88