PowerfulStickyRecyclerViewActivity.java

package com.gavin.com.stickydecoration.view;

import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.text.TextUtils;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;

import com.gavin.com.library.PowerfulStickyDecoration;
import com.gavin.com.library.listener.OnGroupClickListener;
import com.gavin.com.library.listener.PowerGroupListener;
import com.gavin.com.stickydecoration.R;
import com.gavin.com.stickydecoration.model.City;
import com.gavin.com.stickydecoration.util.CityUtil;
import com.gavin.com.stickydecoration.util.DensityUtil;

import java.util.ArrayList;
import java.util.List;


/**
 * 自定义View悬浮
 */
public class PowerfulStickyRecyclerViewActivity extends AppCompatActivity {

    RecyclerView mRv;

    RecyclerView.Adapter mAdapter;
    List<City> dataList = new ArrayList<>();
    PowerfulStickyDecoration decoration;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_sticky_recycler_view);
        initView();
    }

    private void initView() {
        mRv = findViewById(R.id.rv);
        //模拟数据
        dataList.addAll(CityUtil.getCityList());
        dataList.addAll(CityUtil.getCityList());

        //------------- PowerfulStickyDecoration 使用部分  ----------------
        PowerGroupListener listener = new PowerGroupListener() {
            @Override
            public String getGroupName(int position) {
                //获取组名，用于判断是否是同一组
                if (dataList.size() > position) {
                    return dataList.get(position).getProvince();
                }
                return null;
            }

            @Override
            public View getGroupView(int position) {
                //获取自定定义的组View
                if (dataList.size() > position) {
                    View view = getLayoutInflater().inflate(R.layout.item_group, null, false);
                    ((TextView) view.findViewById(R.id.tv)).setText(dataList.get(position).getProvince());
                    return view;
                } else {
                    return null;
                }
            }
        };
        decoration = PowerfulStickyDecoration.Builder
                .init(listener)
                .setGroupHeight(DensityUtil.dip2px(this, 40))
                .setGroupBackground(Color.parseColor("#48BDFF"))
                .setDivideColor(Color.parseColor("#27ad9a"))
                .setDivideHeight(DensityUtil.dip2px(this, 1))
                .setCacheEnable(true)
                .setHeaderCount(3)
                .setOnClickListener(new OnGroupClickListener() {
                    @Override
                    public void onClick(int position, int id) {                                 //Group点击事件
                        String content = "onGroupClick --> " + dataList.get(position).getProvince() + "   id --> " + id;
                        showToast(content);
                    }
                })
                .build();
        //-------------                  ----------------
        //下面是平时的RecyclerView操作
        RecyclerView.LayoutManager manager;
        String type = getIntent().getStringExtra("type");
        if (TextUtils.equals(type, "grid")) {
            manager = new GridLayoutManager(this, 3);
            decoration.resetSpan(mRv, (GridLayoutManager) manager);
        } else {
            manager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
        }
        mRv.setLayoutManager(manager);
        mRv.addItemDecoration(decoration);
        mAdapter = new RecyclerView.Adapter() {
            @Override
            public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
                View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_recycler_view, parent, false);
                return new Holder(view);
            }

            @Override
            public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, final int position) {
                Holder holder = (Holder) viewHolder;
                holder.mTextView.setText(dataList.get(position).getName());
                holder.itemView.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        showToast("Item click " + position);
                    }
                });
            }

            @Override
            public int getItemCount() {
                return dataList.size();
            }
        };
        mRv.setAdapter(mAdapter);
    }

    static class Holder extends RecyclerView.ViewHolder {
        TextView mTextView;

        public Holder(View itemView) {
            super(itemView);
            mTextView = itemView.findViewById(R.id.tv);
        }
    }


    public void onRefresh(View v) {
        dataList.clear();
        dataList.addAll(CityUtil.getRandomCityList());
        mAdapter.notifyDataSetChanged();
        decoration.clearCache();
    }

    private void showToast(String content) {
        Toast.makeText(PowerfulStickyRecyclerViewActivity.this, content, Toast.LENGTH_LONG).show();
    }

    private void l(String str) {
        Log.i("TAG", str);
    }
}