Android实例制作相册，网格视图应用

逃离我推掉我的手 2023-07-04 08:37 9阅读 0赞

效果图如下：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzc4Njc1Ng_size_16_color_FFFFFF_t_70]  
**activity\_main.xml文件**

<?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout 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.mingrisoft.demo.MainActivity">
        
        <GridView
            android:id="@+id/gridview"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:numColumns="3" />
    </RelativeLayout>

**MainActivity.java文件**

package com.mingrisoft.demo;
    
    import android.support.v7.app.ActionBarActivity;
    import android.os.Bundle;
    import android.widget.GridView;
    import android.widget.SimpleAdapter;
    
    import java.util.ArrayList;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    import java.util.Objects;
    
    public class MainActivity extends ActionBarActivity { 
        //存放图片id
        private int[] picture=new int[]{ 
                R.drawable.t1, R.drawable.t2, R.drawable.t3,
                R.drawable.t4, R.drawable.t5, R.drawable.t6,
                R.drawable.t7, R.drawable.t8, R.drawable.t9
        };
        @Override
        protected void onCreate(Bundle savedInstanceState) { 
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            //获取xml中的gridView
            GridView gridView= (GridView) findViewById(R.id.gridview);
            //数据源为List，为顺序容器，元素为Map，键为String,值为Object
            List<Map<String,Object>> listitem=new ArrayList<Map<String,Object>>();
            //将数据放入List中
            for(int i=0;i<picture.length;i++)
            { 
                //创建一个Map对象，即一个List元素
                Map<String,Object> map=new HashMap<String,Object>();
                map.put("image",picture[i]);
                listitem.add(map);
            }
            //创建适配器
            SimpleAdapter simpleAdapter=new SimpleAdapter(this,listitem,R.layout.cell,new String[]{ "image"},new int[]{ R.id.image} );
            //将适配器放入gridView中
            gridView.setAdapter(simpleAdapter);
        }
    }

**cell.xml文件**

<?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">
        //一个单元格显示的内容
            <ImageView
                android:id="@+id/image"
                android:layout_width="100dp"
                android:layout_height="75dp"
                android:scaleType="centerCrop"
                android:padding="5dp"
    
                />
    </LinearLayout>

**完成啦！制作过程与上一篇文章，制作微信好友列表是差不多一样的，同样是了解适配器应用的实例，能看到这里你真的很棒棒哦！**

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzc4Njc1Ng_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200209144941518.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzc4Njc1Ng==,size_16,color_FFFFFF,t_70