AndriodStudio使用listview实现简单图书管理
作者:修24352
这篇文章主要为大家详细介绍了AndriodStudio使用listview实现简单图书管理,文中示例代码介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们可以参考一下
本文实例为大家分享了使用listview实现简单图书管理的具体代码,供大家参考,具体内容如下
在主类布局文件中只需要一个listview即可
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity" android:orientation="vertical"> <ListView android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/list_view" /> </LinearLayout>
在listview的布局文件中给listview定义样式
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal"> <ImageView android:id="@+id/book_img" android:layout_width="103dp" android:layout_height="113dp" /> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/book_name" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/book_author" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/book_info1" /> </LinearLayout> </LinearLayout>
接下来是类方法:首先定义一个Book类用来接收和返回值
package com.example.tow; public class Book { String name; int imageId; String author; String info1; public Book(String name,int imageId,String author,String info1){ this.name = name; this.imageId = imageId; this.author = author; this.info1 = info1; } public Book(String name,int imageId){ this.name = name; this.imageId = imageId; } public String getName(){ return name; } public int getImageId(){ return imageId; } public String getAuthor(){ return author; } public String getInfo1(){ return info1; } }
接着给listview添加一个Adapter这里使用了ArrayAdapter没有使用BaseAdapter是因为完成简单问题使用ArrayAdapter更简单
package com.example.tow; import android.content.Context; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.ImageView; import android.widget.TextView; import androidx.annotation.NonNull; import java.util.List; public class BookAdapter extends ArrayAdapter<Book> { private int resourceId; public BookAdapter(@NonNull Context context, int resource, @NonNull List<Book> objects){ super(context,resource,objects); resourceId = resource; } @Override public View getView(int position, View convertView, ViewGroup parent){ Book book = getItem(position); //LayoutInflater动态加载子视图的布局 View view = LayoutInflater.from(getContext()).inflate(resourceId, parent,false); ImageView bookImg = view.findViewById(R.id.book_img); TextView bookName = view.findViewById(R.id.book_name); TextView bookAuthor = view.findViewById(R.id.book_author); TextView bookInfo1 = view.findViewById(R.id.book_info1); bookImg.setImageResource(book.getImageId()); bookName.setText(book.getName()); bookAuthor.setText(book.getAuthor()); bookInfo1.setText(book.getInfo1()); return view; } }
接下来就是书写主类:
package com.example.tow; import androidx.annotation.NonNull; import androidx.appcompat.app.AlertDialog; import androidx.appcompat.app.AppCompatActivity; import android.content.Context; import android.content.DialogInterface; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.ImageView; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; import java.util.ArrayList; import java.util.List; public class MainActivity extends AppCompatActivity { private List<Book> bookList = new ArrayList<>(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initBook(); BookAdapter adapter = new BookAdapter(MainActivity.this,R.layout.book_item,bookList); ListView listView = findViewById(R.id.list_view); listView.setAdapter(adapter); listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int i, long id) { Book book = bookList.get(i); Toast.makeText(MainActivity.this,book.getName(),Toast.LENGTH_SHORT).show(); } }); listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() { @Override public boolean onItemLongClick(AdapterView<?> parent, View view, int i, long l) { Book book = bookList.get(i); AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this); builder.setTitle("确认删除").setMessage("是否确认删除书籍"+book.getName()+"?"); builder.setPositiveButton("是", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int ij) { bookList.remove(i); adapter.notifyDataSetChanged(); listView.invalidate(); } }); builder.setNegativeButton("否", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { dialogInterface.dismiss(); } }); builder.show(); return false; } }); } public void initBook(){ Book book1 = new Book("火影忍者疾风",R.drawable.book1,"牛仔|可以了","看人kiss"); bookList.add(book1); Book book2 = new Book("火影剧场版",R.drawable.book2,"可爱卡卡西|写不下去了","学习kiss"); bookList.add(book2); Book book3 = new Book("hello",R.drawable.book,"雷切|我说真的","自己去kiss"); bookList.add(book3); Book book4 = new Book("我是卡卡西",R.drawable.book3,"小泽玛利亚|真写不下去了","巨好看的kiss"); bookList.add(book4); Book book5 = new Book("我是鸣人",R.drawable.book4,"广末凉子|词穷了","我燃起来了"); bookList.add(book5); Book book6 = new Book("你是个好人",R.drawable.book5,"鸣人|但是还是得写","我炸了"); bookList.add(book6); Book book7 = new Book("我不想辜负你",R.drawable.book6,"自来也|没办法","开始战斗吧"); bookList.add(book7); Book book8 = new Book("谢谢你",R.drawable.book,"罗密欧|我得交作业","谢谢你泰罗"); bookList.add(book8); Book book9 = new Book("泰罗",R.drawable.book9,"朱丽叶|就这吧","真美"); bookList.add(book9); } }
这里只定义了长按删除的操作,点击操作未完善,可以书写页面跳转自行更改
运行效果:
长按效果:
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。