MainActivity.java

package com.demo;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import com.esaysidebar.EasySideBarBuilder;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    private final String[] mIndexItems = {"定位","热门"};//头部额外的索引
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        initView();

    }

    private void initView() {
        Button btn_sure = (Button)findViewById(R.id.btn_sure);
        btn_sure.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                ArrayList<String> hotCityList = new ArrayList<>();
                hotCityList.add("北京");
                hotCityList.add("上海");
                hotCityList.add("广州");
                hotCityList.add("深圳");
                hotCityList.add("杭州");
                hotCityList.add("成都");
                hotCityList.add("厦门");
                hotCityList.add("天津");
                hotCityList.add("武汉");
                hotCityList.add("长沙");

                new EasySideBarBuilder(MainActivity.this)
                        .setTitle("城市选择")
                        /*.setIndexColor(Color.BLUE)*/
                        .setIndexColor(0xFF0095EE)
                       /* .isLazyRespond(true) //懒加载模式*/
                        .setHotCityList(hotCityList)//热门城市列表
                        .setIndexItems(mIndexItems)//索引字母
                        .setLocationCity("广州")//定位城市
                        .setMaxOffset(60)//索引的最大偏移量
                        .start();

            }
        });
    }

    //数据回调
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch (requestCode) {
            case EasySideBarBuilder.CODE_SIDEREQUEST:
             if (data!=null){
                 String city = data.getStringExtra("selected");
                 Toast.makeText(this,"选择的城市："+city,Toast.LENGTH_SHORT).show();
             }
                break;

            default:
                break;
        }

        }

}