打造Android集合控件数据绑定(支持添加监听,支持AbsListView与RecycleView,支持异步加载等)(三)具体实现

在上面一篇中我们已经获得了所有必要的数据，下面就是在抽象好的onBinder回掉中调用这些method。

1.首先补一下上一篇的坑，Pojo类的解析过程如下

public void bind(AbsListView view,RecyclerView recyclerView,List<?> list,Class clazzType,Object ltnImpl){        if (list == null)            return;        Class clazz = null;        if (list.size() != 0)            clazz = list.get(0).getClass();        else            clazz = clazzType;        ListDataSrc listDataSrc = (ListDataSrc) clazz.getAnnotation(ListDataSrc.class);        if (listDataSrc == null)            return;        List<ClassMemberPackage> mems = null;        try {            mems = ClassMemberParase.GetFileds(list.get(0));        } catch (Exception e) {            e.printStackTrace();        }        if (mems == null||mems.size()==0)            return;        final BinderPackage binderPackage = new BinderPackage();        binderPackage.setList(list);        for (ClassMemberPackage mem : mems){            Annotation[] annotations = mem.getAnnotations();            for (Annotation anno : annotations){                ListBinderBase annobase = anno.annotationType()                        .getAnnotation(ListBinderBase.class);                ListBinderLtnBase ltnannobase = anno.annotationType()                        .getAnnotation(ListBinderLtnBase.class);                if (annobase!=null){                    Method method = null;                    try {                        method = annobase.viewType().getDeclaredMethod(annobase.methodName(),annobase.dataType());                    } catch (NoSuchMethodException e) {                        e.printStackTrace();                    }                    if (method != null) {                        BinderPackage.BinderTarget target =                                binderPackage.new BinderTarget(annobase.viewType(), mem.getField(), method);                        for (int item : getItems(anno))                            binderPackage.getBindlist().put(item, target);                    }                }                if (ltnannobase!=null){                    Method method = null;                    try {                        method = ltnannobase.viewType().getDeclaredMethod(ltnannobase.listenerSetter(),ltnannobase.listenerType());                    } catch (NoSuchMethodException e) {                        e.printStackTrace();                    }                    if (method==null)                        continue;                    Object ltn = ltnImpl;                    BinderPackage.BinderTarget target =                            binderPackage.new BinderTarget(ltn,method,ltnannobase.listenerType());                    for (int item:getItems(anno)){                        if (binderPackage.getBindlist().get(item)==null){                            binderPackage.getBindlist().put(item,target);                        }else {                            BinderPackage.BinderTarget tar = binderPackage.getBindlist().get(item);                            tar.setLtnImpl(ltn);                            tar.setLtnMethod(method);                            tar.setLtnType(ltnannobase.listenerType());                        }                    }                }            }        }

ClassMemberParse是我实现的用于解析对象成员变量的工具类，集成在我的框架中，后期可以将所有反射方法集成在里面，以便于添加缓存，提高框架解析速度。基本过程就是解析注解里的几个参数，加上一些判断，比较重要的是如果客户不想使用简单的ORM映射，可以自己实现onBinder回掉，这样就没有必要解析pojo类了。

2.onBinder的具体细节，这里参考了鸿翔老师的通用ViewHolder抽象出通用的onBinder回掉接口，并在此方法里使用前面解析的数据。

public void setHolder(IViewHolder holder, int position){        for (int i = 0;i < bindlist.size();i++){            int key = bindlist.keyAt(i);            BinderTarget bt = bindlist.get(key);            View view = holder.getView(key);            Field field = bt.getField();            Object value = null;            if (field != null) {                try {                    value = field.get(list.get(position));                } catch (IllegalAccessException e) {                    e.printStackTrace();                }                if (value == null)                    return;            }            Method method = bt.getMethod();            Method ltnmethod = bt.getLtnMethod();            Object ltnImpl = bt.getLtnImpl();            try {                if (method != null)                    method.invoke(view,value);                if (ltnmethod != null) {                    ltnmethod.invoke(view, ltnImpl);                    view.setTag(position);                }            } catch (IllegalAccessException e) {                e.printStackTrace();            } catch (InvocationTargetException e) {                e.printStackTrace();            }        }    }    public void setHolder(ViewHolder holder, int position){        for (int i = 0;i < bindlist.size();i++){            int key = bindlist.keyAt(i);            BinderTarget bt = bindlist.get(key);            View view = holder.getView(key);            Field field = bt.getField();            Object value = null;            if (field != null) {                try {                    value = field.get(list.get(position));                } catch (IllegalAccessException e) {                    e.printStackTrace();                }                if (value == null)                    return;            }            Method method = bt.getMethod();            Method ltnmethod = bt.getLtnMethod();            Object ltnImpl = bt.getLtnImpl();            try {                if (method != null)                    method.invoke(view,value);                if (ltnmethod != null) {                    ltnmethod.invoke(view, ltnImpl);                    view.setTag(position);                }            } catch (IllegalAccessException e) {                e.printStackTrace();            } catch (InvocationTargetException e) {                e.printStackTrace();            }        }    }

两个setBinder分别对应AbsListView和RecycleView。总体来说代码还不怎么健壮，但是基本过程都表述的差不多了

最后是对外调用的接口，链式调用比较美观。

public class ExtCall{        private AbsListView listView;        private RecyclerView recyclerView;        private Class clazz;        private IAdapterCallBack callBack;        private IRcAdapterCallBack rcCallBack;        private Object ltnImpl;        public ExtCall(AbsListView listView) {            this.listView = listView;        }        public ExtCall(RecyclerView recyclerView) {            this.recyclerView = recyclerView;        }        public ExtCall setClass(Class clazz){            this.clazz = clazz;            return this;        }        public ExtCall setCallBack(IAdapterCallBack callBack){            this.callBack = callBack;            return this;        }        public ExtCall setCallBack(IRcAdapterCallBack callBack){            this.rcCallBack = callBack;            return this;        }        public ExtCall setLtnImpl(Object ltnImpl) {            this.ltnImpl = ltnImpl;            return this;        }        public void bind(List<?> list){            if (listView!=null){                if (callBack == null)                    getInstance().bind(listView,recyclerView,list,clazz,ltnImpl);                else                    getInstance().bind(listView,list,callBack,clazz);            }            if (recyclerView!=null){                if (rcCallBack == null)                    getInstance().bind(listView,recyclerView,list,clazz,ltnImpl);                else                    getInstance().bind(recyclerView,list,rcCallBack,clazz);            }        }