package com.example.listviewdemo;

import android.annotation.TargetApi;
import android.os.Build;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@TargetApi(Build.VERSION_CODES.M)
public class MainActivity extends AppCompatActivity implements AdapterView.OnItemClickListener,View.OnScrollChangeListener{
   private ListView listView;
   private ArrayAdapter<String> arr_adapter;
   public SimpleAdapter sim_adapter;
   private List<Map<String,Object>>datalist;

   @TargetApi(Build.VERSION_CODES.M)
   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);
       listView= (ListView) findViewById(R.id.listView);
       String[]arr_data={"慕课网1","慕课网2","慕课网3","慕课网4"};
       datalist=new ArrayList<Map<String,Object>>();
       arr_adapter=new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,arr_data);
       sim_adapter=new SimpleAdapter(this,getDatalist(),R.layout.item,new String[]{"pic","text"},new int[]{R.id.pic,R.id.text});
       //      listView.setAdapter(arr_adapter);
        listView.setAdapter(sim_adapter);
      listView.setOnClickListener((View.OnClickListener) this);
       listView.setOnScrollChangeListener(this);
   }
   private List<Map<String,Object>> getDatalist(){
       for(int i=0;i<20;i++){
           Map<String,Object> map=new HashMap<String,Object>();
               map.put("pic",R.drawable.ic_launcher);
               map.put("text","慕课网"+i);
               datalist.add(map);
       }

       return datalist;
   }

   @Override
   public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
       String str= listView.getItemAtPosition(position) +"";
       Toast.makeText(MainActivity.this,"position="+position+" text="+str,Toast.LENGTH_SHORT).show();
       Log.i("toast",String.valueOf(position));
   }

   @Override
   public void onScrollChange(View v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) {



   }
}