GridView的简单使用

测试代码：

activity_main.xml：

<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" >

    <GridView
        android:id="@+id/gridView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:columnWidth="90dp"
        android:horizontalSpacing="10dp"
        android:numColumns="auto_fit"
        android:stretchMode="columnWidth"
        android:verticalSpacing="10dp" />

</RelativeLayout>

介绍一下里面的某些属性：

android:numColumns="auto_fit" ，GridView的列数设置为自动

android:columnWidth="90dp"，每列的宽度，也就是Item的宽度

android:stretchMode="columnWidth"，缩放与列宽大小同步

android:verticalSpacing="10dp"，两行之间的边距。

android:horizontalSpacing="10dp"，两列之间的边距。

grid_item.xml：

<?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"
    android:padding="10dp" >

    <ImageView
        android:id="@+id/iamgeView"
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:src="@drawable/ic_launcher" />

    <TextView
        android:id="@+id/textView"
        android:layout_width="80dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="5dip"
        android:gravity="center"
        android:text="文字"
        android:textColor="@android:color/holo_red_light" />

</LinearLayout>

MainActivity.java：

package com.zzw.testgridview;

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

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
import android.widget.SimpleAdapter;
import android.widget.Toast;

public class MainActivity extends Activity {

    private GridView gridView;
    private List<Map<String, Object>> data;
    private SimpleAdapter adapter;

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

        init();

        gridView = (GridView) findViewById(R.id.gridView);
        String[] from = { "image", "text" };
        int[] to = { R.id.iamgeView, R.id.textView };
        adapter = new SimpleAdapter(this, data, R.layout.grid_item, from, to);
        gridView.setAdapter(adapter);

        gridView.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                Toast.makeText(MainActivity.this, position + "",
                        Toast.LENGTH_SHORT).show();
            }
        });
    }

    private void init() {
        // 图片封装成一个数组
        int[] image = new int[] { R.drawable.a, R.drawable.b, R.drawable.c,
                R.drawable.d, R.drawable.e, R.drawable.f, R.drawable.g,
                R.drawable.h, R.drawable.i, R.drawable.a, R.drawable.b,
                R.drawable.c, R.drawable.d, R.drawable.e, R.drawable.f,
                R.drawable.g, R.drawable.h, R.drawable.i };

        // 文字封装成一个数组
        String[] text = new String[image.length];
        for (int i = 0; i < image.length; i++) {
            text[i] = "文字" + i;
        }

        data = new ArrayList<Map<String, Object>>();
        for (int i = 0; i < image.length; i++) {
            HashMap<String, Object> map = new HashMap<String, Object>();

            map.put("image", image[i]);
            map.put("text", text[i]);

            data.add(map);
        }
    }
}