Android——使用GridView制作二维布局界面(行、列分布)

1.GridView的三个关键属性

android:numColumns="auto_fit"       每一行显示多少列
android:horizontalSpacing="10dp"   两列之间的间距
android:verticalSpacing="10dp"        两行之间的间距

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

item.xml

<?xml version="1.0" encoding="utf-8"?>

MainActivity.java

import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.GridView;import android.widget.SimpleAdapter;import android.widget.Toast;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;public class MainActivity extends AppCompatActivity implements AdapterView.OnItemClickListener{    private GridView gridView;    private List> dataList;    private int[] icon = {R.drawable.address_book,R.drawable.calendar,R.drawable.camera,R.drawable.clock,            R.drawable.games_control,R.drawable.messenger,R.drawable.ringtone,R.drawable.settings,            R.drawable.speech_balloon,R.drawable.weather,R.drawable.world,R.drawable.youtube};    private String[] iconName = {"通讯录","日历","相机","时钟","游戏","短信","铃声",            "设置","语音","天气","浏览器","视频"};    private SimpleAdapter adapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        gridView = (GridView) findViewById(R.id.gridView);        //1.准备数据源        dataList = new ArrayList<>();        //2.新建适配器（SimpleAdapter）        adapter = new SimpleAdapter(this,getData(),R.layout.item,new String[]{"image","text"},new int[]{R.id.image,R.id.text});        //3.GridView加载适配器        gridView.setAdapter(adapter);        //4.GridView配置事件监听器（OnItemClickListener）        gridView.setOnItemClickListener(this);    }    private List> getData() {        for (int i = 0; i < icon.length; i++) {            Map map = new HashMap<>();            map.put("image",icon[i]);            map.put("text",iconName[i]);            dataList.add(map);        }        return dataList;    }    @Override    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {        Toast.makeText(this,"我是"+iconName[position],Toast.LENGTH_SHORT).show();    }}

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