GrideVlew提供点击按钮添加新数据，单击项目修改，长按删除功能

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package com.example.wang.myapplication;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.EditText;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

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

public class Main2Activity extends AppCompatActivity {

    GridView gv_1;
    List<MyClass> lm;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        gv_1=(GridView)findViewById(R.id.gv_1);

        lm=new ArrayList<MyClass>();

        MyClass myClass=new MyClass(R.drawable.f1,"名称1");

        lm.add(myClass);
        lm.add(new MyClass(R.drawable.f2,"名称2"));

        lm.add(new MyClass(R.drawable.f3,"名称3"));

        lm.add(new MyClass(R.drawable.f4,"名称4"));

        lm.add(new MyClass(R.drawable.f5,"名称5"));

        lm.add(new MyClass(R.drawable.f6,"名称6"));

        lm.add(new MyClass(R.drawable.f7,"名称7"));

        lm.add(new MyClass(R.drawable.f8,"名称8"));

        lm.add(new MyClass(R.drawable.f9,"名称9"));

        lm.add(new MyClass(R.drawable.f10, "名称10"));

        lm.add(new MyClass(R.drawable.f10, "名称11"));

        lm.add(new MyClass(R.drawable.f10, "名称12"));

        final GridAdapter gridAdapter=new GridAdapter();

        gv_1.setAdapter(gridAdapter);

        gv_1.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view, final int position, long id) {

                final View view1=View.inflate(Main2Activity.this, R.layout.activity_main221, null);

                new AlertDialog.Builder(Main2Activity.this)
                        .setView(view1)
                        .setNegativeButton("添加", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {

                                EditText et_1=(EditText)view1.findViewById(R.id.et_1);

                                String str12=et_1.getText().toString();

                                if (str12.length()>=5||str12.trim().length()==0)
                                {
                                    Toast.makeText(Main2Activity.this, "不符合命名规则，请重新命名",
                                            Toast.LENGTH_SHORT).show();

                                    return;
                                }

                                EditText et_2=(EditText)view1.findViewById(R.id.et_2);

                                String str22=et_2.getText().toString();

                                String a="a",aa="aa",aaa="aaa",aaaa="aaaa";

                              if (str22.equals(a))
                                {
                                    lm.add(new MyClass(R.drawable.a,str12));
                                }
                                else if (str22.equals(aa))
                                {
                                    lm.add(new MyClass(R.drawable.aa,str12));
                                }
                              else if (str22.equals(aaa))
                              {
                                  lm.add(new MyClass(R.drawable.aaa,str12));
                              }
                              else if (str22.equals(aaaa))
                              {
                                  lm.add(new MyClass(R.drawable.aaaa,str12));
                              }
                              else
                              {
                                  Toast.makeText(Main2Activity.this, "请从a,aa,aaa,aaaa中选择",
                                          Toast.LENGTH_SHORT).show();
                              }

                                gridAdapter.notifyDataSetChanged();
                            }
                        })
                        .setNeutralButton("取消",null)
                        .setPositiveButton("修改", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                MyClass myClass = lm.get(position);

                                EditText et_1 = (EditText) view1.findViewById(R.id.et_1);

                                String str12 = et_1.getText().toString();

                                if (str12.length() >= 5) {
                                    Toast.makeText(Main2Activity.this, "不符合命名规则，请重新命名",
                                            Toast.LENGTH_SHORT).show();
                                    return;
                                }

                                EditText et_2 = (EditText) view1.findViewById(R.id.et_2);

                                String str22 = et_2.getText().toString();

                                String a = "a", aa = "aa", aaa = "aaa", aaaa = "aaaa";

                                if (str22.equals(a)) {
                                    if (str12.length() == 0) {
                                        myClass.setImg(R.drawable.a);//只修改图片
                                    } else {
                                        myClass.setImg(R.drawable.a);
                                        myClass.setName(str12);
                                    }
                                } else if (str22.equals(aa)) {
                                    if (str12.length() == 0) {
                                        myClass.setImg(R.drawable.aa);
                                    } else {
                                        myClass.setImg(R.drawable.aa);
                                        myClass.setName(str12);
                                    }
                                } else if (str22.equals(aaa)) {
                                    if (str12.length() == 0) {
                                        myClass.setImg(R.drawable.aaa);
                                    } else {
                                        myClass.setImg(R.drawable.aaa);
                                        myClass.setName(str12);
                                    }
                                } else if (str22.equals(aaaa)) {
                                    if (str12.length() == 0) {
                                        myClass.setImg(R.drawable.aaaa);
                                    } else {
                                        myClass.setImg(R.drawable.aaaa);
                                        myClass.setName(str12);
                                    }
                                } else if (str22.length() == 0) {
                                    if (str12.length() == 0) {
                                        Toast.makeText(Main2Activity.this, "请至少修改一项内容", Toast.LENGTH_SHORT).show();
                                    } else {
                                        myClass.setName(str12);
                                    }
                                } else {
                                    Toast.makeText(Main2Activity.this, "请从a,aa,aaa,aaaa中选择", Toast.LENGTH_SHORT).show();
                                }

                                gridAdapter.notifyDataSetChanged();
                            }
                        })
                        .show();
            }
        });

        gv_1.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
            @Override
            public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
                lm.remove(position);
                gridAdapter.notifyDataSetChanged();
                return true;
            }
        });

    }

    class GridAdapter extends BaseAdapter
    {
        @Override
        public int getCount() {
            return lm.size();
        }

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

        @Override
        public long getItemId(int position) {
            return 0;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {

            MyClass myClass=lm.get(position);

            if (convertView==null)
            {
                Log.e("TAG", "适配器 getView=" + position);
                convertView=View.inflate(Main2Activity.this,R.layout.activity_main21,null);
            }
            ImageView imageView=(ImageView)convertView.findViewById(R.id.iv_1);

            imageView.setImageResource(myClass.getImg());

            TextView textView=(TextView)convertView.findViewById(R.id.tv_1);

            if (myClass.getName().length()>=5||myClass.getName().trim().length()==0)
            {
                Toast.makeText(Main2Activity.this, myClass.getName()+"不符合命名规则，请重新命名",
                        Toast.LENGTH_LONG).show();

                textView.setText("");
            }
            else
            {
                textView.setText(myClass.getName());
            }

            return convertView;
        }
    }

    class MyClass
    {
        private int img;

        private String name;


        public int getImg() {
            return img;
        }

        public void setImg(int img) {
            this.img = img;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

        public MyClass(int img,String name)
        {
            this.img=img;
            this.name=name;
        }
    }
}
java
<?xml version="1.0" encoding="utf-8"?>
<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="com.example.wang.myapplication.Main2Activity">
    <GridView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/gv_1"
        android:numColumns="4"
        android:gravity="center"
        android:horizontalSpacing="20dp">
    </GridView>

</RelativeLayout>
activity_main2
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <ImageView
        android:layout_width="70dp"
        android:layout_height="70dp"
        android:id="@+id/iv_1"/>
    <TextView
        android:layout_width="70dp"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:id="@+id/tv_1"/>

</LinearLayout>
activity_main21
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <EditText
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:layout_marginTop="5dp"
        android:gravity="center"
        android:hint="请从a,aa,aaa,aaaa,f1~f10中选择一张图"
        android:id="@+id/et_2" />
    <EditText
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:layout_marginTop="5dp"
        android:gravity="center"
        android:hint="请给图片命名"
        android:id="@+id/et_1" />



</LinearLayout>
activity_main221

 

 

1.初始运行界面

 

 

2.单击效果图

 

3.添加按钮效果

 

 

3.1 添加的图片不在drawable里效果

 

 

3.2 添加图片名称不符合要求效果，程序中要求名称字符长度小于5

3.3.添加完四张图片的效果

 

4 修改效果

4.1 修改图片名称4为1234效果

 

4.2修改  名称7对应的图片为a效果

 

5.长按效果，初始状态，长按aaaa后的效果，再长按aaa的效果

 

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