【安卓开发】借助setOnItemClickListener动态更新Listview

public class DeleteCityActivity extends AppCompatActivity implements View.OnClickListener{
    ImageView errorIv,rightIv;
    ListView deleteLv;
    String[] hotCitys = {"北京","上海","广州","深圳","珠海","佛山","南京","苏州","厦门","长沙","成都","福州",
            "杭州","武汉","青岛","西安","太原","沈阳","重庆","天津","南宁"};
    List<String> mDatas=new ArrayList<>();//列表数据源
    List<String>deleteCitys=new ArrayList<>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_delete_city);
        deleteLv = findViewById(R.id.delete_lv);//找到组件
        errorIv=findViewById(R.id.delete_iv_error);
        rightIv=findViewById(R.id.delete_iv_right);
        //传入数据
        mDatas = new ArrayList<>();
        for(String s:hotCitys){
            mDatas.add(s);
        }
       //设置监听事件
        errorIv.setOnClickListener(this);
        rightIv.setOnClickListener(this);
        //设置适配器
        DeleteCityAdapter baseAdapter = new DeleteCityAdapter(this, mDatas, deleteCitys);
        deleteLv.setAdapter(baseAdapter);
        deleteLv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int pos, long id) {
                TextView deletecity=view.findViewById(R.id.item_delete_tv);//找到点击的textview
                String cityname=deletecity.getText().toString().trim();//城市名
                System.out.println(pos+cityname);//找到位置
                mDatas.remove(cityname);
                deleteCitys.add(cityname);
                baseAdapter.notifyDataSetChanged();
                for(String tt:deleteCitys){
                    System.out.println("删除了"+tt+"\n");
                }
            }
        });
    }
    public void cancel(View view){
        Toast.makeText(this,"跳转到城市管理页面",Toast.LENGTH_LONG).show();
    }
    public void ok(View view){
        String tmp="";
        for(String s:deleteCitys)
            tmp=tmp+s+" ";
        Toast.makeText(this,"跳转到城市管理页面\n"+"删除了"+tmp,Toast.LENGTH_LONG).show();
    }
    @Override
    public void onClick(View view) {
        switch (view.getId()){
            case R.id.delete_iv_error:
                cancel(view);
                break;
            case R.id.delete_iv_right:
                ok(view);
                break;
        }
    }
}