腳本之家服務(wù)器常用軟件

快捷導(dǎo)航

軟件下載

android MAC 驅(qū)動(dòng)下載字體下載 DLL

源碼下載

PHP ASP.NET ASP JSP

軟件編程

C# JAVA C 語(yǔ)言 Delphi Android

網(wǎng)絡(luò)編程

PHP ASP.NET ASP JavaScript

在線(xiàn)工具

CSS格式化 JS格式化 Html轉(zhuǎn)化為Js

數(shù)據(jù)庫(kù)

MYSQL MSSQL oracle DB2 MARIADB

CMS

PHPCMS DEDECMS 帝國(guó)CMS WordPress

常用工具

PHP開(kāi)發(fā)工具 python Photoshop 必備軟件

基于Java實(shí)現(xiàn)一個(gè)簡(jiǎn)單的單詞本Android App的實(shí)踐

更新時(shí)間：2022年01月27日 09:33:54 作者：像向日葵一樣~

本文基于Java實(shí)現(xiàn)了一個(gè)簡(jiǎn)單的單詞本安卓app，用的是SQLite數(shù)據(jù)庫(kù)，文中通過(guò)示例代碼介紹的非常詳細(xì)，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

布局設(shè)計(jì)

單詞本主界面

<?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"
    android:orientation="vertical"
    tools:context=".AddDanciActivity">
 
    <EditText
        android:id="@+id/addword_edit"
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:layout_marginTop="20dp"
        android:hint="單詞:"
        android:textColor="@android:color/black"
        android:textColorHint="#DCDCDC"
        android:textSize="30dp" />
 
    <EditText
        android:id="@+id/fanyiword_edit"
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:hint="解釋:"
        android:textColor="@android:color/black"
        android:textColorHint="#DCDCDC"
        android:textSize="30dp" />
 
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentBottom = "true"
        android:layout_margin="5dp">
    <ListView
        android:id="@+id/add_list"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:textColor="@android:color/black"
        android:textColorHint="#DCDCDC"
        android:textSize="30dp"
        android:layout_above="@id/lineLayout"
        />
 
        <LinearLayout
            android:layout_height="50dp"
            android:layout_width="match_parent"
            android:id="@+id/lineLayout"
            android:layout_alignParentBottom="true"
            android:orientation="horizontal"
            android:gravity="center_horizontal"
            >
        <Button
            android:layout_width="100dp"
            android:layout_height="50dp"
            android:id="@+id/add_btn"
            android:text="添加" />
        <Button
            android:layout_width="100dp"
            android:layout_height="50dp"
            android:layout_centerHorizontal="true"
            android:id="@+id/shanchu_btn"
            android:layout_gravity="center_vertical"
            android:text="刪除" />
        <Button
            android:layout_width="100dp"
            android:layout_height="50dp"
            android:id="@+id/quxiao_btn"
            android:layout_gravity="right"
            android:text="取消" />
        </LinearLayout>
 
    </RelativeLayout>
 
</LinearLayout>

代碼

AddDanciActivity.java

單詞本主界面的Activity

import androidx.appcompat.app.AppCompatActivity;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
 
public class AddDanciActivity extends AppCompatActivity {
 
    private EditText wordedit;
    private EditText yisiedit;
    private Button add_btn;
    private Button quxiao_btn;
    private Button shanchu_btn;
    private ListView listview;
    private DBOpenHelper dbOpenHelper;//聲明
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_add_danci);
        dbOpenHelper = new DBOpenHelper(AddDanciActivity.this, "db_dict", null, 1);//實(shí)例化，創(chuàng)建數(shù)據(jù)庫(kù)
        wordedit = (EditText) findViewById(R.id.addword_edit);
        yisiedit = (EditText) findViewById(R.id.fanyiword_edit);
        listview = (ListView) findViewById(R.id.add_list);
        add_btn = (Button) findViewById(R.id.add_btn);
        quxiao_btn = (Button) findViewById(R.id.quxiao_btn);
        shanchu_btn = (Button) findViewById(R.id.shanchu_btn);
        quxiao_btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(AddDanciActivity.this, "返回單詞本主界面", Toast.LENGTH_SHORT).show();
                finish();
            }
        });
 
        shanchu_btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String word = wordedit.getText().toString();
                String ys = yisiedit.getText().toString();
                if (word.equals("")) {
                    Toast.makeText(AddDanciActivity.this, "填寫(xiě)的單詞為空", Toast.LENGTH_SHORT).show();
                } else {
                    deleteData(dbOpenHelper.getReadableDatabase(), word);
                    Toast.makeText(AddDanciActivity.this, "刪除成功", Toast.LENGTH_SHORT).show();
                }
            }
        });
 
        add_btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String word = wordedit.getText().toString();
                String ys = yisiedit.getText().toString();
                if (word.equals("") || ys.equals("")) {
                    Toast.makeText(AddDanciActivity.this, "填寫(xiě)的單詞或解釋為空", Toast.LENGTH_SHORT).show();
                } else {
                    insertData(dbOpenHelper.getReadableDatabase(), word, ys);//插入生詞
                    Toast.makeText(AddDanciActivity.this, "添加生詞成功", Toast.LENGTH_SHORT).show();
                    renew();
                }
            }
        });
    }
 
    //插入數(shù)據(jù)的方法
    private void insertData(SQLiteDatabase sqLiteDatabase, String word, String ys) {
        ContentValues values = new ContentValues();
        values.put("word", word);//保存單詞
        values.put("detail", ys);
        sqLiteDatabase.insert("tb_dict", null, values);//執(zhí)行插入操作
        renew();
    }
 
    private void deleteData(SQLiteDatabase sqLiteDatabase, String word) {
        ContentValues values = new ContentValues();
        String[] args = {String.valueOf(word)};
        sqLiteDatabase.delete("tb_dict", "word=?", args);//執(zhí)行刪除操作
        renew();
    }
 
 
    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (dbOpenHelper != null) {
            dbOpenHelper.close();//關(guān)閉
        }
    }
 
    public void renew() {
        Cursor cursor = dbOpenHelper.getReadableDatabase().query("tb_dict", null, null, null, null, null, null);
        ArrayList<Map<String, String>> resultList = new ArrayList<Map<String, String>>();
        while (cursor.moveToNext()) {
            Map<String, String> map = new HashMap<String, String>();
            map.put("word", cursor.getString(1));
            map.put("interpret", cursor.getString(2));
            resultList.add(map);
        }
 
        if (resultList == null || resultList.size() == 0) {
            Toast.makeText(AddDanciActivity.this, "很遺憾，沒(méi)有相關(guān)記錄！", Toast.LENGTH_SHORT).show();
        } else {
            SimpleAdapter simpleAdapter = new SimpleAdapter(AddDanciActivity.this, resultList, R.layout.item, new String[]{"word", "interpret"
            }, new int[]{R.id.textView, R.id.textView2});
            listview.setAdapter(simpleAdapter);
        }
    }
 
    @Override
    protected void onStart() {
        super.onStart();
        renew();
    }
}

DBOpenHelper.java

用到的是SQLite數(shù)據(jù)庫(kù)，Android自帶了一種輕量級(jí)數(shù)據(jù)庫(kù)，使用非常方便。

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
import androidx.annotation.Nullable;
 
public class DBOpenHelper extends SQLiteOpenHelper {
 
    final String CREATE_TABLE_SQL = "create table tb_dict (_id integer primary key autoincrement,word,detail)";//定義創(chuàng)建表的
 
    public DBOpenHelper(@Nullable Context context, @Nullable String name, @Nullable SQLiteDatabase.CursorFactory factory, int version) {
        super(context, name, null, version);
    }
 
    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL(CREATE_TABLE_SQL);//創(chuàng)建單詞的數(shù)據(jù)表
    }
 
    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        Log.i("詞典", "--版本更新" + oldVersion + "-->" + newVersion);
    }
}

效果圖

到此這篇關(guān)于基于Java實(shí)現(xiàn)一個(gè)簡(jiǎn)單的單詞本Android App的實(shí)踐的文章就介紹到這了,更多相關(guān)Java 單詞本內(nèi)容請(qǐng)搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！

您可能感興趣的文章: