View（视图）——GridView作业

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.wang.testapp2.TestActivity10">

    <GridView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/gv_1"
        android:numColumns="4"
        android:stretchMode="columnWidth"
        android:gravity="center"
        android:horizontalSpacing="30dp"
        ></GridView>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:layout_width="110dp"
        android:layout_height="110dp"
        android:id="@+id/iv_3"/>
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/tv_9"
        android:text="内容"/>

</LinearLayout>

package com.example.wang.testapp2;

import android.app.ActionBar;
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.AbsListView;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.List;

public class TestActivity10 extends AppCompatActivity {

    GridView gv_1;

    List<MyClass> lm;
//    List<Integer> liv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test10);

        GridView gv_1=(GridView)findViewById(R.id.gv_1);

        lm=new ArrayList<>();

        MyClass myClass=new MyClass(R.drawable.f1,"美食1");

        lm.add(myClass);

        lm.add(new MyClass(R.drawable.f2,"美食2"));
        lm.add(new MyClass(R.drawable.f3,"美食3"));
        lm.add(new MyClass(R.drawable.f4,"美食4"));
        lm.add(new MyClass(R.drawable.f5,"美食5"));
        lm.add(new MyClass(R.drawable.f6,"美食6"));
        lm.add(new MyClass(R.drawable.f7,"美食7"));
        lm.add(new MyClass(R.drawable.f8,"美食8"));
        lm.add(new MyClass(R.drawable.f9,"美食9"));
        lm.add(new MyClass(R.drawable.f10,"美食10"));

        GridAdapter gridAdapter=new GridAdapter();

        gv_1.setAdapter(gridAdapter);





//        //1 数据 图片的id
//        liv =new ArrayList<>();
//        liv.add(R.drawable.f1);
//        liv.add(R.drawable.f2);
//        liv.add(R.drawable.f3);
//        liv.add(R.drawable.f4);
//        liv.add(R.drawable.f5);
//        liv.add(R.drawable.f6);
//        liv.add(R.drawable.f7);
//        liv.add(R.drawable.f8);
//        liv.add(R.drawable.f9);
//        liv.add(R.drawable.f10);
//
//        gv_1.setAdapter(new ImageAdapter());

    }

    class  MyClass
    {
        private int img;

        private String name;


        public int getImg() {
            return img;
        }

        public void setImg(int img) {
            this.img = img;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

        public MyClass(int img,String name)
        {
            this.img=img;
            this.name=name;
        }
    }


    // 适配器

//    class  ImageAdapter extends BaseAdapter
//    {
//        @Override
//        public int getCount() {
//            return lm.size();
//        }
//
//        @Override
//        public Object getItem(int position) {
//            return lm.get(position);
//        }
//
//        @Override
//        public long getItemId(int position) {
//            return 0;
//        }
//
//        @Override
//        public View getView(int position, View convertView, ViewGroup parent) {

//            //1. 得到数据 图片的id
//            Integer ivid=liv.get(position);
//
//            //2.准备View
//            if (convertView==null)
//            {
//                convertView = new ImageView(TestActivity10.this);
//            }
//
//            //3.适配
//            // 转换
//            ImageView imageView=(ImageView)convertView;
//
//            imageView.setImageResource(ivid);
//
////            imageView.setMaxWidth(70);
////            imageView.setMaxHeight(70);
//
//            imageView.setLayoutParams(new GridView.LayoutParams(110,110));
//
//
//            return imageView;

    class GridAdapter extends BaseAdapter
    {
        @Override
        public int getCount() {
            return lm.size();
        }

        @Override
        public Object getItem(int position) {
            return lm.get(position);
        }

        @Override
        public long getItemId(int position) {
            return 0;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            MyClass myClass=lm.get(position);

            if (convertView==null)
            {
                Log.e("TAG","适配器getView="+position);

                convertView=View.inflate(TestActivity10.this,R.layout.listview_layout,null);
            }

            ImageView imageView=(ImageView)convertView.findViewById(R.id.iv_3);
            imageView.setImageResource(myClass.getImg());

            TextView textView=(TextView)convertView.findViewById(R.id.tv_9);
            textView.setText(myClass.getName());


            return convertView;
        }
    }

}