网格布局作业

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.administrator.testapp">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity" />
        <activity android:name=".test_activity6" />
        <activity android:name=".TestActivity7" />
        <activity android:name=".TestActivity8" />
        <activity android:name=".Main2Activity" />
        <activity android:name=".TestActivity9">
        </activity>
        <activity android:name=".TestActivity10">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

<?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"
    tools:context="com.example.administrator.testapp.TestActivity10">

    <GridView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/gv_1"
        android:numColumns="4"
        android:horizontalSpacing="20dp"
        android:stretchMode="columnWidth"
        android:gravity="center">
    </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="100dp"
        android:layout_height="100dp"
        android:src="@drawable/f1"
        android:id="@+id/gv_2"/>
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/gv_3"
        android:text="123"
        android:layout_gravity="center_horizontal"
        android:textColor="#000"
        android:textStyle="bold"/>
</LinearLayout>

package com.example.administrator.testapp;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.TextView;

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

public class TestActivity10 extends AppCompatActivity {

    GridView gv_1;
    List<MyClass> liv;
    TextView gv_3;
    ImageView gv_2;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test10);
        gv_1 = (GridView)findViewById(R.id.gv_1);
        gv_3 = (TextView)findViewById(R.id.tv_3);
        gv_2 = (ImageView)findViewById(R.id.gv_2);

        //1、数据 图片的id
        liv = new ArrayList<>();
        MyClass myClass = new MyClass(R.drawable.f1,"美食1");
        liv.add(myClass);
        liv.add(new MyClass(R.drawable.f2,"美食2"));
        liv.add(new MyClass(R.drawable.f3,"美食3"));
        liv.add(new MyClass(R.drawable.f4,"美食4"));
        liv.add(new MyClass(R.drawable.f5,"美食5"));
        liv.add(new MyClass(R.drawable.f6,"美食6"));
        liv.add(new MyClass(R.drawable.f7,"美食7"));
        liv.add(new MyClass(R.drawable.f8,"美食8"));
        ImageAdapter imageAdapter = new ImageAdapter();
        {
            gv_1.setAdapter(imageAdapter);
        }
    }
    class MyClass
    {
        private int img;
        private String content;

        public int getImg() {
            return img;
        }

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

        public String getContent() {
            return content;
        }

        public void setContent(String content) {
            this.content = content;
        }
        public MyClass(int img,String content)
        {
            this.img = img;
            this.content = content;
        }
    }
    //适配器
    class ImageAdapter extends BaseAdapter
    {
        @Override
        public int getCount() {
            return liv.size();
        }

        @Override
        public Object getItem(int position) {
            return liv.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
            MyClass myClass = liv.get(position);
            //2.准备View
            if (convertView ==null) {
                convertView = View.inflate(TestActivity10.this, R.layout.gridlayout, null);
            }
            //3.适配
            //转换
            ImageView imageView = (ImageView)convertView.findViewById(R.id.gv_2);
            imageView.setImageResource(myClass.getImg());

            TextView textView = (TextView)convertView.findViewById(R.id.gv_3);
            textView.setText(myClass.getContent());

            return convertView;
        }
    }
}