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安卓一运行就崩溃,求助

作者:karspb 时间:2019-09-27 13:39:26 0 删除 编辑
package com.example.jiaoxh.myapplication1;

import android.content.Context;
import android.graphics.Color;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;

import org.json.JSONArray;
import org.json.JSONObject;

import java.io.BufferedInputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class AmenitiesActivity extends AppCompatActivity {

   ArrayList<Map<String,String>>items=new ArrayList<Map<String, String>>();




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

//这里的错误貌似
    Map<String, String> map = new HashMap<String, String>();
    map.put("textView_name", "111");
    map.put("textView_price", "222");
    items.add(map);



        ListView listView=(ListView)findViewById(R.id.listView_amenities);

        MyAdapter myAdapter=new MyAdapter(this,items,R.layout.list_item,new String[]{"textView_name","textView_price"},new int[]{R.id.textView_name,R.id.textView_price});

        listView.setAdapter(myAdapter);
    }

    //重写适配器
class MyAdapter extends SimpleAdapter {
        public MyAdapter(Context context, List<? extends Map<String, ?>> data, int resource, String[] from, int[] to) {
            super(context, data, resource, from, to);
        }

        @Override
public View getView(int position, View convertView, ViewGroup parent) {

            ListView listView=(ListView)findViewById(R.id.listView_amenities);
            if(position%2!=0){
                listView.setBackgroundColor(Color.GRAY);
            }else{
                listView.setBackgroundColor(Color.TRANSPARENT);
            }
            return listView;
        }
    }
}



不知道
Map<String, String> map = new HashMap<String, String>();
    map.put("textView_name", "111");
    map.put("textView_price", "222");
    items.add(map);
这里为啥错误,求指点一下


来自 “ ITPUB博客 ” ,链接:https://blog.itpub.net/2001/viewspace-3152968/ ,如需转载,请注明出处,否则将追究法律责任。

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