android GridView的应用举例

最新推荐文章于 2025-08-08 23:51:41 发布

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最新推荐文章于 2025-08-08 23:51:41 发布

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分类专栏： android 文章标签： android layout object encoding image string

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本文介绍了一个简单的 Android 应用示例，展示了如何使用 GridView 控件显示带有图片和文字的列表项，并实现了点击事件反馈。

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AppMain.java

package lxy.litsoft;

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.GridView;
import android.widget.SimpleAdapter;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Toast;

public class AppMain extends Activity implements OnItemClickListener{
	
	private GridView testGridView;	//声明一个GridView
    public List<Map<String, Object>> listForGridView = new ArrayList<Map<String, Object>>();
    SimpleAdapter adapter = null;
    
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        //GridView测试
        testGridView();
    }

    private void testGridView(){
		testGridView = (GridView) findViewById(R.id.myGridView1);
        testGridView.setNumColumns(4);	//设置列数为4
        for(int i = 0; i < 10; i++){
        	Map<String, Object> item = new HashMap<String, Object>();
        	item.put("image", R.drawable.icon);
            item.put("text", "Pic"+i);
            listForGridView.add(item);
        }
        //实例一个GridView的适配器
        adapter = new SimpleAdapter(
        		this, listForGridView, R.layout.meeting, 
        		new String[]{"image", "text"}, 
        		new int[]{ R.id.image_item, R.id.text_item});
        testGridView.setAdapter(adapter);			//添加适配器
        testGridView.setOnItemClickListener(this);	//添加点击监听器
	}
    //GridView的监听器
	public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
		Toast.makeText(AppMain.this, "你点击的是第"+arg2+"个Item", Toast.LENGTH_LONG).show();
	}
}

meeting.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:id="@+id/RelativeLayout01"
	android:layout_width="fill_parent" android:layout_height="fill_parent"
	xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical">
	<ImageView android:id="@+id/image_item" android:layout_width="wrap_content"
		android:layout_height="wrap_content" android:layout_gravity="center_horizontal">
	</ImageView>
	<TextView android:id="@+id/text_item" android:layout_width="wrap_content"
		android:layout_height="wrap_content" android:textSize="20sp"
		android:layout_gravity="center_horizontal" />
</LinearLayout>

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"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
<GridView
 	android:id="@+id/myGridView1"
	android:layout_width="wrap_content" 
	android:layout_height="wrap_content"
	android:horizontalSpacing="20dp"
	android:verticalSpacing="20dp"
	></GridView>
</LinearLayout>