Android中GridView实现互相添加和删除

日常的开发中有可能会涉及到一些添加或者删除表格的操作，这时候需要用到GridView，在Android系统布局定义里，它是一个网络形状的Layout，我们可以用Adapter对其进行填充，并且可也自定义GridView的相关属性。

1. 布局文件:activity_main.xml

<LinearLayout 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"
    tools:context="com.example.mygridview.MainActivity"
    android:orientation="vertical"
     >

    <DatePicker 
        android:id="@+id/dp1"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        />
    <TextView 
        android:id="@+id/txt1"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        />
    <GridView 
        android:id="@+id/gv1"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:numColumns="auto_fit"
        android:verticalSpacing="10dp"
        android:horizontalSpacing="10dp"
        android:columnWidth="90dp"
        android:stretchMode="columnWidth"
        android:gravity="center"
        android:layout_weight="1"
        />
    <GridView 
        android:id="@+id/gv2"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:numColumns="auto_fit"
        android:verticalSpacing="10dp"
        android:horizontalSpacing="10dp"
        android:columnWidth="90dp"
        android:stretchMode="columnWidth"
        android:gravity="center"
        android:layout_weight="1"
        />
</LinearLayout>

2. 两个gridView.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:paddingBottom="4dip" >

    <TextView
        android:id="@+id/ItemText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:text="TextView01" >
    </TextView>

</RelativeLayout>

3. 主代码：

package com.example.mygridview;

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 {

	public GridView gridView1, gridView2;
	private ArrayList<HashMap<String, Object>> lstImageItem, lstItem;
	private SimpleAdapter saImageItems, saImages;

	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		gridView1 = (GridView) findViewById(R.id.gv1);
		gridView2 = (GridView) findViewById(R.id.gv2);

		// 生成动态数组，并且转入数据
		lstImageItem = new ArrayList<HashMap<String, Object>>();
		lstItem = new ArrayList<HashMap<String, Object>>();
		for (int i = 0; i < 10; i++) {
			HashMap<String, Object> map = new HashMap<String, Object>();
			map.put("ItemText", "NO." + String.valueOf(i));
			lstImageItem.add(map);
		}
		saImageItems = new SimpleAdapter(this, lstImageItem,
				R.layout.act_gridview, new String[] { "ItemText" },
				new int[] { R.id.ItemText });

		saImages = new SimpleAdapter(this, lstItem, R.layout.act_gridview1,
				new String[] { "ItemText" }, new int[] { R.id.ItemText });
		
		gridView1.setAdapter(saImageItems);
		gridView2.setAdapter(saImages);
		
		gridView1.setOnItemClickListener(new ItemClickListener());
		gridView2.setOnItemClickListener(new ItemClickListener1());
	}

	class ItemClickListener implements OnItemClickListener {

		@Override
		public void onItemClick(AdapterView<?> parent, View view, int position,
				long id) {
			// TODO Auto-generated method stub
			@SuppressWarnings("unchecked")
			HashMap<String, Object> item = (HashMap<String, Object>) parent
					.getItemAtPosition(position);
			setTitle((String) item.get("ItemText"));
			HashMap<String, Object> map = new HashMap<String, Object>();
			map.put("ItemText", (String) item.get("ItemText"));
			lstItem.add(map);
			lstImageItem.remove(position);

			saImageItems.notifyDataSetChanged();
			saImages.notifyDataSetChanged();
		}
	}
	class ItemClickListener1 implements OnItemClickListener {

		@Override
		public void onItemClick(AdapterView<?> parent, View view, int position,
				long id) {
			// TODO Auto-generated method stub
			@SuppressWarnings("unchecked")
			HashMap<String, Object> item = (HashMap<String, Object>) parent
					.getItemAtPosition(position);
			setTitle((String) item.get("ItemText"));
			HashMap<String, Object> map = new HashMap<String, Object>();
			map.put("ItemText", (String) item.get("ItemText"));
			lstImageItem.add(map);
			lstItem.remove(position);

			saImageItems.notifyDataSetChanged();
			saImages.notifyDataSetChanged();
		}
	}
}