Android_gridView_LIstener_examle

layout.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"
    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=".MainActivity" >
    <GridView 
        android:id="@+id/gridView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:numColumns="3"
        android:horizontalSpacing="2dp"
        android:verticalSpacing="2dp"
        ></GridView>


</RelativeLayout>

gridview_item.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"
    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=".MainActivity" >
        <ImageView 
            android:id="@+id/image"
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:src="@drawable/ic_launcher"
            />
        <ImageView 
            android:id="@+id/image_delete"
            android:layout_width="30dp"
            android:layout_height="30dp"
            android:layout_alignParentRight="true"
            android:src="@drawable/delete"
            />

        
</RelativeLayout>

MyAdapter.java

package com.example.day09_gridview_listener;

import java.util.List;

import android.content.Context;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.Toast;

class MyAdapter extends BaseAdapter{
    private List<Integer> dataList;
    private Context context;
    private boolean isShow = false;
    
    public MyAdapter(List<Integer> dataList, Context context) {
        super();
        this.dataList = dataList;
        this.context = context;
    }

    public boolean getisShow() {
        return isShow;
    }

    public void setisShow(boolean isShow) {
        this.isShow = isShow;
        //更新数据
        notifyDataSetChanged();
    }

    @Override
    public int getCount() {
        return dataList.size();
    }

    @Override
    public Object getItem(int position) {
        return dataList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        View view = View.inflate(context, R.layout.gridview_item, null);
        ImageView image = (ImageView) view.findViewById(R.id.image);
        ImageView deleteImg = (ImageView) view.findViewById(R.id.image_delete);
        //设置删除图标是否显示       可编辑?显示:消失
        Log.i("MainActivity---------", getisShow()+"");
        
        deleteImg.setVisibility(isShow?View.VISIBLE:View.GONE);
        image.setImageResource(dataList.get(position));

        deleteImg.setOnClickListener(new View.OnClickListener() {
            
            @Override
            public void onClick(View v) {
                Toast.makeText(context, "点击了XX", 0).show();
                dataList.remove(dataList.get(position));
                notifyDataSetChanged();
            }
        });
        
        return view;
    }

}

Main.java

package com.example.day09_gridview_listener;

import java.util.ArrayList;
import java.util.List;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.Toast;
/**
 * 需求:gridView实现点击X按钮实现删除图片的功能
 *         
 * 1.初始化控件
 * 2.初始化数据
 * 3.实现BaseAdapter中方法将数据填充
 *         1.初始页面
 *         2.设置长按监听事件
 *             1.普通操作--不操作
 *             2,编辑操作--长按显示x图标
 *                 1.点击x图标删除该图片,更新view
 *         3.设置点击监听事件
 *             1,编辑操作--不操作
 *             2.普通操作--点击恢复原状,x图标消失=        
 * 4.创建适配器
 * 5.设置适配器
 * @author my
 *
 */
public class MainActivity extends Activity {
    private int imageRes[] = {R.drawable.f000,R.drawable.f001,R.drawable.f002,R.drawable.f003,R.drawable.f004,R.drawable.f005,R.drawable.f006,R.drawable.f007,R.drawable.f008};
    private List<Integer>list;
    private GridView gridView;
    private MyAdapter myAdapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        gridView = (GridView) findViewById(R.id.gridView);
        //设置数据源
        list = getListByArray();
        myAdapter = new MyAdapter(list,MainActivity.this);
        //设置适配器
        gridView.setAdapter(myAdapter);
        //设置单击事件
        gridView.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                Toast.makeText(MainActivity.this, "单击", 0).show();
                if(myAdapter.getisShow()){
                    myAdapter.setisShow(false);        
                }else{
                }
            }
        });
        //设置长按事件
        gridView.setOnItemLongClickListener(new OnItemLongClickListener() {

            @Override
            public boolean onItemLongClick(AdapterView<?> parent, View view,
                    int position, long id) {
                Toast.makeText(MainActivity.this, "长按", 0).show();
                if(myAdapter.getisShow()){
                }else{
                    myAdapter.setisShow(true);
                }
                return true;
            }
        });
    }
    private List<Integer> getListByArray() {
            list = new ArrayList<Integer>();
        for (int i = 0; i < imageRes.length; i++) {
            list.add(imageRes[i]);
        }
        return list;
    }

}

普通状态

长按

删除