Android学习笔记之——ListView 的两种适配器ArrayAdapter和SimpleAdapter

package com.example.zyallz.listviewdemo;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;

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

public class MainActivity extends AppCompatActivity {

private ListView listView;
private ArrayAdapter<String> arr_adapter;
private SimpleAdapter simp_adapter;
private String[] arr_data;
private List<Map<String, Object>> simp_data;

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

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

arr_data = new String[]{"列表1", "列表2", "列表3", "列表4", "列表5", "列表6", "列表7",};
arr_adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, arr_data);

simp_data = new ArrayList<>();
simp_adapter = new SimpleAdapter(this, getData(), R.layout.item, new String[]{"pic", "text"}, new int[]{R.id.pic, R.id.textview});
//        listView.setAdapter(arr_adapter);
listView.setAdapter(simp_adapter);

}

private List<Map<String, Object>> getData() {

for (int i = 0; i < 20; i++) {
Map<String, Object> map = new HashMap<>();
map.put("pic", R.drawable.img);
map.put("text", "列表" + i);
simp_data.add(map);
}

return simp_data;
}

}