Android基础——gridView的实现

Love The Way You Lie 2022-05-24 10:45 212阅读 0赞

**今实现gridView**

MainActivity.java:

package com.example.administrator.helloworld;
    
    import android.app.Activity;
    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;
    
    public class MainActivity extends Activity { 
    
        public int[] ids = new int[]{
                R.drawable.timg, R.drawable.timg02,
                R.drawable.timg03, R.drawable.timg04,
                R.drawable.timg05, R.drawable.timg06,
        };
    
        public String[] names = new String[]{
                "name1", "name2","name3", "name4","name5", "name6",
        };
    
        public GridView gridView;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
    
            List<Map<String, Object>> data = new ArrayList<Map<String, Object>>();
            for (int i = 0; i < 6; i++){
                Map<String, Object> map = new HashMap<String, Object>();
                map.put("id", ids[i]);
                map.put("name", names[i]);
                data.add(map);
            }
    
            gridView = (GridView) findViewById(R.id.gridview);
            SimpleAdapter simpleAdapter = new SimpleAdapter(
                    this,
                    data,
                    R.layout.item,
                    new String[] {
       "id", "name"},
                    new int[] {R.id.imageView, R.id.text}
            );
            gridView.setAdapter(simpleAdapter);
        }
    }

布局文件如下：

activity\_main.java:

<?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:id="@+id/activity_main" 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.administrator.helloworld.MainActivity">
    
        <GridView android:id="@+id/gridview" android:numColumns="3" android:layout_width="match_parent" android:layout_height="match_parent">
    
        </GridView>
    </RelativeLayout>

item.java:

<?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:orientation="vertical">
    
        <ImageView android:id="@+id/imageView" android:layout_width="wrap_content" android:layout_height="wrap_content" />
    
        <TextView android:id="@+id/text" android:layout_width="wrap_content" android:layout_height="wrap_content" />
    
    </LinearLayout>