test_gridview代码：
<?xml version="1.0" encoding="utf-8"?> <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" 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.my.myapplication.Test_GridView" android:orientation="vertical"> <GridView android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/gv_1" android:numColumns="4" android:stretchMode="columnWidth" android:horizontalSpacing="30dp"></GridView> <Button android:layout_width="match_parent" android:layout_height="wrap_content" android:text="添加" android:onClick="bt_onClick" android:id="@+id/bt_1"/> </LinearLayout>
gridview代码：
<?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="110dp" android:layout_height="110dp" android:src="@drawable/f1" android:id="@+id/iv_2"/> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/tv_9"/> </LinearLayout>
tianjia代码：
<?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="wrap_content" android:hint="从a，b，c里面选择图片" android:id="@+id/et_3"/> <EditText android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="请输入名称" android:id="@+id/et_4"/> </LinearLayout>
Activity代码：
package com.example.my.myapplication; import android.app.AlertDialog; import android.content.DialogInterface; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.BaseAdapter; import android.widget.Button; 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 Test_GridView extends AppCompatActivity { GridView gv_1; List<MyClass> liv; TextView tv_9; ImageView iv_2; Button bt_1; final ImageAdapter imageAdapter = new ImageAdapter(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_test__grid_view); gv_1=(GridView)findViewById(R.id.gv_1); tv_9=(TextView)findViewById(R.id.tv_9); iv_2=(ImageView)findViewById(R.id.iv_2); bt_1=(Button)findViewById(R.id.bt_1); //1.数据 图片的id liv=new ArrayList<>(); MyClass myClass=new MyClass(R.drawable.f1,"美食1的价格"); liv.add(myClass); liv.add(new MyClass(R.drawable.f2,"美食2的价格")); liv.add(new MyClass(R.drawable.f3,"美食3的价格")); liv.add(new MyClass(R.drawable.f4,"美食4的价格")); liv.add(new MyClass(R.drawable.f5,"美食5的价格")); liv.add(new MyClass(R.drawable.f6,"美食6的价格")); liv.add(new MyClass(R.drawable.f7,"美食7的价格")); liv.add(new MyClass(R.drawable.f8,"美食8的价格")); liv.add(new MyClass(R.drawable.f9,"美食9的价格")); final ImageAdapter im=new ImageAdapter(); gv_1.setAdapter(im); gv_1.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { final MyClass myClass = liv.get(position); LayoutInflater layoutInflater = getLayoutInflater(); final View view1 = layoutInflater.inflate(R.layout.tianjia, null); new AlertDialog.Builder(Test_GridView.this) .setTitle("修改内容") .setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { EditText et_3=(EditText)view1.findViewById(R.id.et_3); String string1=et_3.getText().toString(); EditText et_4 = (EditText)view1.findViewById(R.id.et_4); String string2 = et_4.getText().toString(); String a="a",b="b",c="c",d="d"; if (string1.equals(a)) { if (string2.length() ==0) { myClass.setImg(R.drawable.a1); } else { myClass.setImg(R.drawable.a1); myClass.setContent(string2); } } else if (string1.equals(b)) { if (string2.length() ==0) { myClass.setImg(R.drawable.a2); } else { myClass.setImg(R.drawable.a2); myClass.setContent(string2); } } else if (string1.equals(c)) { if (string2.length() ==0) { myClass.setImg(R.drawable.a3); } else { myClass.setImg(R.drawable.a3); myClass.setContent(string2); } } else { Toast.makeText(Test_GridView.this, "请做出至少一项修改", Toast.LENGTH_SHORT).show(); } imageAdapter.notifyDataSetChanged(); } }) .setView(view1) .show(); } }); //长按删除的监听器 gv_1.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() { @Override public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) { //删除数据 //从集合里删除长按的数据 liv.remove(position); //刷新视图，看到效果 //通知适配器，数据源改变了 im.notifyDataSetChanged(); Toast.makeText(Test_GridView.this, "删除了记录索引 = "+position, Toast.LENGTH_SHORT).show(); return true;//事件已经被消费，不要再处理了 } }); } public void bt_onClick(View v) { final View view=View.inflate(Test_GridView.this,R.layout.tianjia,null); new AlertDialog.Builder(Test_GridView.this) .setTitle("请操作。。。") .setView(view) .setPositiveButton("添加", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { EditText et_3=(EditText)view.findViewById(R.id.et_3); String string1=et_3.getText().toString(); EditText et_4 = (EditText)view.findViewById(R.id.et_4); String string2 = et_4.getText().toString(); String a="a",b="b",c="c",d="d"; if(string1.equals(a)) { liv.add(new MyClass(R.drawable.a1,string2)); } else if (string1.equals(b)) { liv.add(new MyClass(R.drawable.a2,string2)); } else if (string1.equals(c)) { liv.add(new MyClass(R.drawable.a3,string2)); } else { Toast.makeText(Test_GridView.this, "请从a,b,c中选择", Toast.LENGTH_SHORT).show(); } imageAdapter.notifyDataSetChanged(); } }) .setNegativeButton("取消",null) .setView(view) .show(); } class MyClass { private int img; private String content; public int getImg() { return img; } public void setImg(int img) { this.img=img; } public String getContent() { return content; } public void setContent(String content) { this.content=content; } public MyClass(int img,String content) { this.img=img; this.content=content; } } //适配器 class ImageAdapter extends BaseAdapter { @Override public int getCount() { return liv.size(); } @Override public Object getItem(int position) { return liv.get(position); } @Override public long getItemId(int position) { return 0; } @Override public View getView(int position, View convertView, ViewGroup parent) { //1.得到数据 图片的id MyClass myClass=liv.get(position); //2.准备View if (convertView==null) { convertView=View.inflate(Test_GridView.this,R.layout.gridview,null); } //3.适配 //转换 ImageView imageView=(ImageView)convertView.findViewById(R.id.iv_2); imageView.setImageResource(myClass.getImg()); // imageView.setMaxWidth(70); // imageView.setMaxHeight(70); //imageView.setLayoutParams(new GridView.LayoutParams(70,70)); TextView textView=(TextView)convertView.findViewById(R.id.tv_9); textView.setText(myClass.getContent()); return convertView; } } }