Android问答游戏将图像问题添加到SQLite数据库

Question

我正在构建一个使用SQLite数据库的问答游戏。在问题以文本显示的那一刻，我想用图像作为问题。点击下面的“图像示例”，看看我的意思。左侧的图像是我的应用程序现在的样子，但是我想让它看起来像右侧的图像。我该怎么做？

image example

这是数据库看起来像

package com.example.sqz; 


import android.content.ContentValues; 
import android.content.Context; 
import android.database.Cursor; 
import android.database.sqlite.SQLiteDatabase; 
import android.database.sqlite.SQLiteOpenHelper; 

import java.util.ArrayList; 
import java.util.Collections; 
import java.util.List; 
import java.util.Random; 

public class QuizHelper extends SQLiteOpenHelper { 
private static final int DATABASE_VERSION = 1;// constant for version of database 

private static final String DATABASE_NAME = "SQZ.db";// constant for database name 
private static final String TABLE_QUEST = "quest";// constant for table name 

// constant for identifying table and columns 
private static final String KEY_ID = "questionid"; 
private static final String COL_QUES = "question"; 
private static final String COL_ANSWER = "answer"; // correct answer 
private static final String COL_ANSWER1 = "ANSWER1"; // answer 1 
private static final String COL_ANSWER2 = "ANSWER2"; // answer 2 
private static final String COL_ANSWER3 = "ANSWER3"; // answer 3 
private static final String COL_ANSWER4 = "ANSWER4"; // answer 4 
private static final String LEVEL = "LEVEL"; 

private SQLiteDatabase mydbase; 

public QuizHelper(Context context) { 
    super(context, DATABASE_NAME, null, DATABASE_VERSION); 
} 



@Override 
public void onCreate(SQLiteDatabase db) { 
    mydbase = db; 
    String sql = "CREATE TABLE IF NOT EXISTS " + TABLE_QUEST + " (" 
      + KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " + COL_QUES 
      + " TEXT, " + COL_ANSWER + " TEXT, " + COL_ANSWER1 + " TEXT, " 
      + COL_ANSWER2 + " TEXT, " + COL_ANSWER3 + " TEXT, " + COL_ANSWER4 + " TEXT, "+ LEVEL+ " TEXT)"; 
    db.execSQL(sql); 
    addQuestion(); 
    // db.close(); 
} 

private void addQuestion() { 
    Question q1 = new Question("Which team won FIFA world cup in 2002 ?", "Brazil", "England","Germany", "Italy", "Brazil",1); 
    this.addQuestion(q1); 
    Question q2 = new Question("How many goals Messi scored UEFA Champions League 2015 ?", "7", "6", "5", "8", "6",1); 
    this.addQuestion(q2); 
    Question q3 = new Question("Which team won cricket world cup in 2015 ?", "Australia", "England","New Zealand", "South Africa", "Australia",1); 
    this.addQuestion(q3); 
    Question q4 = new Question("Which team won premier league in 2015 ?", "Arsenal", "Manchester city", "Liverpool", "Chelsea", "Chelsea",1); 
    this.addQuestion(q4); 
    Question q5 = new Question("What team does LeBron James play for ?", "Cleveland Cavaliers", "Charlotte Hornets", "Los Angeles Clippers", "Miami Heat", "Cleveland Cavaliers",1); 
    this.addQuestion(q5); 
    Question q6 = new Question("Who scored the most goals in 2013 ?", "Lionel Messi", "Zlatan Ibrahimovic", "thierry henry", "Cristiano Ronaldo", "Cristiano Ronaldo",1); 
    this.addQuestion(q6); 
    Question q7 = new Question("Which team won world twenty20 in 2012 ?", "Australia", "West Indies", "South Africa", "Sri Lanka", "West Indies",1); 
    this.addQuestion(q7); 
    Question q8 = new Question("Who won Formula 1 championship in 2013 ?", "Fernando Alonso", "Sebastian Vettel", "Esteban Gutierrez", "Lewis Hamilton", "Sebastian Vettel",1); 
    this.addQuestion(q8); 
    Question q9 = new Question("Who won world darts championship in 2015 ?", "Gary Anderson", "Phil Taylor", "Boris Koltsov", "Michael van Gerwen", "Gary Anderson",1); 
    this.addQuestion(q9); 
    Question q10 = new Question("Cristiano Ronaldo played for which team in 2007 ?", "Arsenal", "Chelsea", "Liverpool", "Man United", "Man United",1); 
    this.addQuestion(q10); 
    Question q11 = new Question("how many goals Steven gerrard has scored for liverpool ?", "186", "195", "188", "174", "186",1); 
    this.addQuestion(q11); 
    Question q12 = new Question("Steve Smith plays for which cricket team ?", "England", "New Zealand", "South Africa", "Australia", "Australia",1); 
    this.addQuestion(q12); 
    Question q13 = new Question("How many goals Neymar scored for Santos ?", "137", "136", "140", "138", "136",1); 
    this.addQuestion(q13); 
    Question q14 = new Question("Steven Finn plays for which cricket team ?", "England", "New Zealand", "South Africa", "Australia", "England",1); 
    this.addQuestion(q14); 
    Question q15 = new Question("Which football team Wayne Rooney play for ?", "Man City", "Liverpool", "Man United", "Arsenal", "Man United",1); 
    this.addQuestion(q15); 
    Question q16 = new Question("Which tennis player was ranked number 1 in 2016 ?", "Roger Federer", "Tomas Berdych", "Novak Djokovic", "Rafael Nadal", "Novak Djokovic",1); 
    this.addQuestion(q16); 
    Question q17 = new Question("Who won Wimbledon Championships ? 2013", "Roger Federer", "Tomas Berdych", "Novak Djokovic", "Andy Murray", "Andy Murray",1); 
    this.addQuestion(q17); 
    Question q18 = new Question("Which team won FIFA world cup in 2014 ?", "Spain", "Germany", "Brazil", "Italy", "Germany",1); 
    this.addQuestion(q18); 
    Question q19 = new Question("Which team won twenty20 cricket in 2009 ?", "Pakistan", "Indian", "England", "Sri Lanka", "Pakistan",1); 
    this.addQuestion(q19); 
    Question q20 = new Question("Which team won cricket world cup in 2007 ?", "India", "Sri Lanka", "New Zealnad", "Australia", "Australia",1); 
    this.addQuestion(q20); 
    Question q21 = new Question("Who won tour de france 2014 ?", "Bradley Wiggins", "Leopold Konig", "Vincenzo Nibali", "Alberto Contador", "Vincenzo Nibali",1); 
    this.addQuestion(q21); 

    // END 
} 

@Override 
public void onUpgrade(SQLiteDatabase db, int oldV, int newV) { 

    db.execSQL("DROP TABLE IF EXISTS " + TABLE_QUEST);// Drop older table if existed 

    onCreate(db); // Create another table 
} 

// Adding new question 
public void addQuestion(Question quest) { 
    // SQLiteDatabase db = this.getWritableDatabase(); 
    ContentValues values = new ContentValues(); 
    values.put(COL_QUES, quest.getQUESTION()); 
    values.put(COL_ANSWER, quest.getANSWER()); 
    values.put(COL_ANSWER1, quest.getA1()); 
    values.put(COL_ANSWER2, quest.getA2()); 
    values.put(COL_ANSWER3, quest.getA3()); 
    values.put(COL_ANSWER4, quest.getA4()); 
    values.put(LEVEL, quest.getLevel()); 

    // Inserting Row 
    mydbase.insert(TABLE_QUEST, null, values); 
} 

public List<Question> getAllQuestions() { 
    List<Question> questionList = new ArrayList<Question>(); 
    // Select All Query 
    String selectQuery = "SELECT * FROM " + TABLE_QUEST; 
    mydbase = this.getReadableDatabase(); 
    Cursor cursor = mydbase.rawQuery(selectQuery, null); 
    // looping through all rows and adding to list 
    if (cursor.moveToFirst()) { 
     do { 
      Question quest = new Question(); 
      quest.setID(cursor.getInt(0)); 
      quest.setQUESTION(cursor.getString(1)); 
      quest.setANSWER(cursor.getString(2)); 
      quest.setASWR1(cursor.getString(3)); 
      quest.setASWR2(cursor.getString(4)); 
      quest.setASWR3(cursor.getString(5)); 
      quest.setASWR4(cursor.getString(6)); 



       questionList.add(quest); 
     } while (cursor.moveToNext()); 
    } 
    // return quest list 
    ArrayList<Integer> list=new ArrayList<Integer>(); 
    for(int i=0;i<20;i++) 
     list.add(i); 

    Collections.shuffle(list, new Random()); 

    List<Question> shuffledQuestionList = new ArrayList<Question>(); 


    for(int i=0;i<20;i++) 
     shuffledQuestionList.add(questionList.get(list.get(i))); 



    return shuffledQuestionList; 

} 

public List<Question> getAllQuestionsByLevel(int level) { 
    List<Question> questionList = new ArrayList<Question>(); 
    // Select All Query 
    String selectQuery = "SELECT * FROM " + TABLE_QUEST+" where "+LEVEL+" ='"+String.valueOf(level)+"'"; 
    mydbase = this.getReadableDatabase(); 
    Cursor cursor = mydbase.rawQuery(selectQuery, null); 
    // looping through all rows and adding to list 
    if (cursor.moveToFirst()) { 
     do { 
      Question quest = new Question(); 
      quest.setID(cursor.getInt(0)); 
      quest.setQUESTION(cursor.getString(1)); 
      quest.setANSWER(cursor.getString(2)); 
      quest.setASWR1(cursor.getString(3)); 
      quest.setASWR2(cursor.getString(4)); 
      quest.setASWR3(cursor.getString(5)); 
      quest.setASWR4(cursor.getString(6)); 
      quest.setLevel(cursor.getInt(7)); 

      if(quest.getLevel()==level) 
       questionList.add(quest); 
     } while (cursor.moveToNext()); 
    } 
    return questionList; 
    // return quest list 
    //ArrayList<Integer> list=new ArrayList<Integer>(); 
    //for(int i=0;i<5;i++) 
    // list.add(i); 
    /// Collections.shuffle(list); 
// List<Question> shuffledQuestionList = new ArrayList<Question>(); 


//  for(int i=0;i<5;i++) 
//   shuffledQuestionList.add(questionList.get(list.get(i))); 


    //return shuffledQuestionList; 

} 



} 

Answer 1

你有两个选择，如果你想要的一切离线保留：根据名字从资源数据库

1. 店面形象的名称（或暗示），然后加载图像到一个新的图像视和其嵌套进入问题容器。

2. 将图像转换为base64（基本上是文本表示），并将其作为文本存储到数据库。一旦你得到它转换回位图，并设置位图绘制到新的图像视图，然后嵌套到问题容器。

Answer 2

我会建议存储图像在线的服务器上，然后在数据库中你必须指向正确的图像的URL。如果您希望将图像存储在本地设备上，则可以在启动应用程序时缓存它们。只需查找数据库链接并在本地下载每个链接。让他们在线托管也可以让您灵活地在本地缓存它们，或者只是在旅途中简单地显示它们。

编辑：您当然可以将所有图像添加到assets文件夹，然后在数据库中添加一个指针以指向正确的图像。此解决方案完全脱机。