步步为营_Android开发课[22]_用户界面之GridView(网格视图)

Focus on technology, enjoy life！—— QQ：804212028
浏览链接：http://blog.youkuaiyun.com/y18334702058/article/details/44624305

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• 主题：用户界面之GridView(网格视图)
  -九宫格布局就是用它来实现的。

GridView实现九宫格（实例）：
activity_main.xml:

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

    <GridView 
        android:id="@+id/gridview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:columnWidth="90dp"
        android:gravity="center"
        android:padding="30dp"
        android:numColumns="3"
        android:stretchMode="columnWidth"
        android:verticalSpacing="10dp"
        android:horizontalSpacing="10dp"
        />

</LinearLayout>

给gridview中的item自定义布局:
gridview_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" >

    <ImageView 
        android:id="@+id/image"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:layout_centerHorizontal="true"/>
    <TextView 
        android:id="@+id/str"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:layout_centerHorizontal="true"/>
</LinearLayout>

MainActivity.java:

import java.util.ArrayList;
import java.util.HashMap;
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;

public class MainActivity extends Activity{

    private int[] image = {R.drawable.myimage,R.drawable.myimage,R.drawable.myimage,R.drawable.myimage
            ,R.drawable.myimage,R.drawable.myimage,R.drawable.myimage,R.drawable.myimage};
    private String[] str = {"宫式布局1", "宫式布局2", "宫式布局3", "宫式布局4", "宫式布局5",
            "宫式布局6", "宫式布局7", "宫式布局8" };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        GridView gridView = (GridView)findViewById(R.id.gridview);

        ArrayList<HashMap<String,Object>> item = new ArrayList<HashMap<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("str", str[i]);
            item.add(map);
        }

        SimpleAdapter simpleAdapter = new SimpleAdapter(this, item, R.layout.gridview_item, new String[] { "image", "str" }, new int[] {
                R.id.image, R.id.str });
        gridView.setAdapter(simpleAdapter);
        gridView.setOnItemClickListener(new ItemClickListener());

    }      

    class ItemClickListener implements OnItemClickListener{

        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                long arg3) {
            // TODO Auto-generated method stub
            //这里写监听事件
        }

    }
}

运行结果：

Focus on technology, enjoy life！—— QQ：804212028
浏览链接：http://blog.youkuaiyun.com/y18334702058/article/details/44624305