如何使用存储在 SQLite 中的图像名称从可绘制对象中获取图像？

Question

我正在尝试使用 SQLite 开发一个 Android 测验应用程序。我的数据库有一个包含问题和答案的表。 问题可能有文字或图像。 因此，我将图像放入可绘制对象中，并将名称放入测验表的列中。 我尝试在与我的每个测验问题相关联的 ImageView 中加载图像的内容（使用该列的值），但我不确定我是否使用了正确的代码。我不想使用 blob。 有什么建议吗？ 任何答案将不胜感激。 谢谢你。

这就是我想写的，以便从 db 和 drawable 调用图像：

 `String  y =  "R.drawable."+currentQuestion.getImage();
           tvImgQuest.setImageResource(Integer.parseInt (y));`

这是我使用的方法：

 `private void showNextQuestion()
   {
    radioButton1.setTextColor (textColorDefaultRb);
    radioButton2.setTextColor (textColorDefaultRb);
    radioButton3.setTextColor (textColorDefaultRb);
    radioButton4.setTextColor (textColorDefaultRb);
    radioGroup.clearCheck();

    if (questionCounter < questionCountTotal )
    {
        currentQuestion = questionList.get(questionCounter);

        tvQuestion.setText(currentQuestion.getQuestion ());
        if(currentQuestion.getImage() == null || currentQuestion.getImage().isEmpty()) {
            tvImgQuest.setVisibility (View.INVISIBLE);}
             else{
            ImageView tvImgQuest=(ImageView) findViewById(R.id.tvImgQuest);
            tvImgQuest.setVisibility (View.VISIBLE);

           String  y =  "R.drawable."+currentQuestion.getImage();
           tvImgQuest.setImageResource(Integer.parseInt (y));

        }
        radioButton1.setText(currentQuestion.getAnswer1 ());
        radioButton2.setText(currentQuestion.getAnswer2 ());
        radioButton3.setText(currentQuestion.getAnswer3 ());

        /**Hide radio button in case possible answers are three */
        if(currentQuestion.getAnswer4() == null || currentQuestion.getAnswer4().isEmpty()) {
            radioButton4.setVisibility(View.INVISIBLE);
        } else {
            radioButton4.setVisibility(View.VISIBLE);
            radioButton4.setText(currentQuestion.getAnswer4());
        }

        questionCounter++;
        tvQuestionCount.setText("Question: " + questionCounter + "/" + questionCountTotal);
        answered = false;
        butconfirmAns.setText("Submit");
    }
    else {
        finishQuiz();
    }

}`

控制台

桌子

`public static class QuestionTable implements BaseColumns {
    public static final String TABLE_NAME = "quiz_question";
    public static final String COLUMN_QUESTION = "question";
    public static final String COLUMN_IMAGE = "image";
    public static final String COLUMN_ANSWER1 = "answer1";
    public static final String COLUMN_ANSWER2 = "answer2";
    public static final String COLUMN_ANSWER3 = "answer3";
    public static final String COLUMN_ANSWER4 = "answer4";
    public static final String COLUMN_ANSWERNUM = "answerNum";

`

调试器

可绘制

Answer 1

可绘制的 id 是 integer 并且它不是可以转换为 integer 的字符串，您的代码必须是这样的：

Context context =tvImgQuest.getContext();
int id = context.getResources().getIdentifier(name, "drawable", context .getPackageName());
tvImgQuest.setImageResource(id);