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
转载于:https://www.cnblogs.com/wangchuanqi/p/5518246.html
