DropDownMenu

This is a DropDownMenu with the advantage of all the dropDownMenus by others before, I have written it for several times, Now the code is most clearly.

中文文档

##Feature

1. use Adapter to add the SubDropDownMenu. Override the getView() method to supply the wantted view.
2. use Generic to make all kinds of model(pojo,javabean...) can be used.
3. use FilterCheckedView which implements Checkable, so you can use selector to respond to all user action.
4. use FilterUrl to save the current choosen data, only override toString() you will get the url.

##ScreenShot

Usage

the xml:

    <com.baiiu.filter.DropDownMenu
        android:id="@+id/filterDropDownView"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <TextView
            android:id="@id/mFilterContentView" //mFilterContentView must be add into the view.the view can be a RecyclerView or others.
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="center_vertical"
            android:textSize="22sp" />
    </com.baiiu.filter.DropDownMenu> 

the javaCode:

    //set the Adapter.
    dropDownView.setMenuAdapter(new DropMenuAdapter(this, titleList));

the DropMenuAdapater:

 @Override
    public int getMenuCount() {
        return titles.length;
    }

    @Override
    public String getMenuTitle(int position) {
        return titles[position];
    }

    @Override
    public int getBottomMargin(int position) {
        return 0;
    }

    @Override
    public View getView(int position, FrameLayout parentContainer) {
        ...
        return createSingleListView();
    }

add a SingleListView:

    private View createSingleListView() {
    
        SingleListView<String> singleListView = new SingleListView<String>(mContext)
                .adapter(new SimpleTextAdapter<String>(null, mContext) {
                    @Override
                    public String provideText(String string) {
                        return string;
                    }
                })
                .onItemClick(new OnFilterItemClickListener<String>() {
                    @Override
                    public void onItemClick(String item) {
                        FilterUrl.instance().singleListPosition = item;
    
                        FilterUrl.instance().position = 0;
                        FilterUrl.instance().positionTitle = item;
    
                        if (onFilterDoneListener != null) {
                            onFilterDoneListener.onFilterDone(0, "", "");
                        }
                    }
                });
                
        //初始化数据
        singleListView.setList(list, -1);//默认不选中
    }