GridView入门级使用

<GridView
        android:layout_marginTop="10dp"
        android:numColumns="3"
        android:horizontalSpacing="10dp"
        android:verticalSpacing="10dp"
        android:layout_width="wrap_content"
        android:id="@+id/gv_view"
        android:layout_height="wrap_content" />

item布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:background="@android:color/black"
    android:orientation="vertical">
<ImageView
    android:src="@mipmap/ic_launcher"
    android:id="@+id/iv_icon"
    android:layout_width="60dp"
    android:layout_height="60dp" />
    <TextView
        android:layout_marginTop="5dp"
        android:text="默认文字"
        android:textColor="@android:color/white"
        android:id="@+id/tv_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
</LinearLayout>

主要逻辑

package com.example.gridview;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.RelativeLayout;
import android.widget.SimpleAdapter;
import android.widget.Toast;

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

import butterknife.Bind;
import butterknife.ButterKnife;

public class MainActivity extends AppCompatActivity implements AdapterView.OnItemClickListener {

    @Bind(R.id.gv_view)
    GridView gvView;
    @Bind(R.id.activity_main)
    RelativeLayout activityMain;
private List<Map<String,Object>> dataList;
    private  int[]icon={R.mipmap.ic_launcher,R.mipmap.ic_launcher,R.mipmap.ic_launcher,R.mipmap.ic_launcher,R.mipmap.ic_launcher,R.mipmap.ic_launcher,R.mipmap.ic_launcher,R.mipmap.ic_launcher,R.mipmap.ic_launcher,R.mipmap.ic_launcher,R.mipmap.ic_launcher,R.mipmap.ic_launcher};
    private  String[]iconName={"1","2","3","4","5","6","7","8","9","10","11","12"};
    private SimpleAdapter simpleAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);
        //准备数据源
        // 新建适配器
        // GridView加载适配器
        //GridView配置监听器（OnItemClickLisener）
        dataList=new ArrayList<>();
      //  getData();
        simpleAdapter = new SimpleAdapter(this,getData(),R.layout.item,new String[]{"image","text"},new int[]{R.id.iv_icon,R.id.tv_name});
        gvView.setAdapter(simpleAdapter);
        gvView.setOnItemClickListener(this);
    }

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

        for (int i = 0; i < icon.length; i++) {
            HashMap<String, Object> hm = new HashMap<>();
            hm.put("image",icon[i]);
            hm.put("text",iconName[i]);
            dataList.add(hm);
        }

        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();
    }
}