DWStickItemDecoration

使用方式只需两步

第一步:

Gradle compile dependency:

    	compile 'com.ufo:DWStickItemDecoration:1.0.0'

第二步:

  RecyclerView recyclerView = findViewById(R.id.recycler_view);
  DWStickItemDecoration decoration = new DWStickItemDecoration(this) {
            @Override
            protected boolean isShowItemLabel(int position) {
                //返回true表示要显示组的第一个item的标签
                //看下面的模拟演示数据
                return mList.get(position).isShowLable();
            }

            @Override
            protected String getItemLabelStr(int position) {
                //返回标签的文本字符串
                return mList.get(position).getSpell();
            }
        };
   recyclerView.addItemDecoration(decoration);

更多可设置相关参数:

        //设置标签颜色
//        decoration.setLabelColor(Color.DKGRAY);
        //设置标签高度
//        decoration.setLabelHeight(30);
        //设置标签字体颜色
//        decoration.setTextColor(Color.RED);
        //设置标签字体大小
//        decoration.setTextSize(50);

.

模拟演示数据

        list.add(new DataBean("阿狗", true, "A"));  //isShowIitemLabel()返回true  ;getItemLabelStr()返回A
        list.add(new DataBean("安智", false, "A"));//isShowIitemLabel()返回false ;getItemLabelStr()返回A
        list.add(new DataBean("爱", false, "A")); //isShowIitemLabel()返回false ;getItemLabelStr()返回A
        list.add(new DataBean("操", true, "C"));    //isShowIitemLabel()返回true  ;getItemLabelStr()返回C
        list.add(new DataBean("成成", false, "C"));   //......
        list.add(new DataBean("陈百", false, "C"));
        list.add(new DataBean("陈百2", false, "C"));
        list.add(new DataBean("陈百3", false, "C"));
        list.add(new DataBean("陈百34", false, "C"));
        list.add(new DataBean("陈百345", false, "C"));
        list.add(new DataBean("家家", true, "J"));
        list.add(new DataBean("叫叫", false, "J"));
        list.add(new DataBean("杰杰", false, "J"));
        list.add(new DataBean("杰杰1", false, "J"));
        list.add(new DataBean("杰杰2", false, "J"));
        list.add(new DataBean("杰杰3", false, "J"));
        list.add(new DataBean("杰杰4", false, "J"));
        list.add(new DataBean("科", true, "K"));
        list.add(new DataBean("开门", false, "K"));
        list.add(new DataBean("阿凯", false, "K"));
        list.add(new DataBean("烟", true, "Y"));
        list.add(new DataBean("烟1", false, "Y"));
        list.add(new DataBean("烟2", false, "Y"));
        list.add(new DataBean("烟3", false, "Y"));
        list.add(new DataBean("烟4", false, "Y"));
        list.add(new DataBean("造4", true, "Z"));
        list.add(new DataBean("智4", false, "Z"));

更多细节请查看Demo里的代码.