找不到Android Textview資源

Question

試圖掌握android整個書呆子牧場指南，我遇到了以下示例：

super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_quiz);
    mQuestionTextView = (TextView) findViewById(R.id.question_text_view);
    int question = mQuestionBank[mCurrentIndex].getTextResId();
    mQuestionTextView.setText(question);

mQuestionBank在哪里

 private Question[] mQuestionBank = new Question[] {
        new Question(R.string.question_oceans, true),
        new Question(R.string.question_mideast, false),
        new Question(R.string.question_africa, false),
        new Question(R.string.question_americas, true),
        new Question(R.string.question_asia, true),
};

那些已經在strings.xml中定義了

<string name="question_oceans">The Pacific Ocean is larger than the Atlantic Ocean.</string>
<string name="question_mideast">The Suez Canal connects the Red Sea and the Indian Ocean.</string>
<string name="question_africa">The source of the Nile River is in Egypt.</string>
<string name="question_americas">The Amazon River is the longest river in the Americas.</string>
<string name="question_asia">Lake Baikal is the world\'s oldest and deepest freshwater lake.</string>

但是我得到一個資源未找到異常。 （textResId是問題類的第一個字段）

編輯：

問題類別

public class Question {
private int mTextResId;
private boolean mAnswerTrue;

public Question(int mTextResId, boolean mAnswerTrue) {
    mTextResId=mTextResId;
    mAnswerTrue=mAnswerTrue;
}

public int getTextResId() {
    return mTextResId;
}

public void setTextResId(int textResId) {
    mTextResId = textResId;
}

public boolean isAnswerTrue() {
    return mAnswerTrue;
}

public void setAnswerTrue(boolean answerTrue) {
    mAnswerTrue = answerTrue;
}

Answer 1

試試這個，讓我知道結果。 mQuestionTextView.setText(getResources().getString(question));

還要更改Question類的構造器部分

public Question(int mTextResId, boolean mAnswerTrue) {
    this.mTextResId=mTextResId;
    this.mAnswerTrue=mAnswerTrue;
}

Answer 2

使用此標准代碼：

在您的String.xml文件中使用String數組

  <string-array name="questions">
    <item>The Pacific Ocean is larger than the Atlantic Ocean.</item>
    <item>The Suez Canal connects the Red Sea and the Indian Ocean.</item>
    <item>The source of the Nile River is in Egypt.</item>
    <item>The Amazon River is the longest river in the Americas.</item>
    <item>Lake Baikal is the world\'s oldest and deepest freshwater lake.</item>
</string-array>

現在在您的java類中使用以下代碼

super.onCreate(savedInstanceState); 
setContentView(R.layout.activity_quiz);
String[] mQuestionBank = getResources().getStringArray(R.array.questions);
mQuestionTextView = (TextView) findViewById(R.id.question_text_view);
String question = mQuestionBank[mCurrentIndex];
mQuestionTextView.setText(question);

Answer 3

構造函數的每個參數都遮蔽了對象的一個​​字段-在Question類的構造函數內部， mTextResId是構造函數的第一個參數的本地副本，而mAnswerTrue是構造函數的第二個參數的本地副本。

要引用問題字段mTextResId ，構造函數必須使用this.mTextResId && this.mAnswerTrue 。 嘗試

public Question(int mTextResId, boolean mAnswerTrue) {
    this.mTextResId = mTextResId;
    this.mAnswerTrue = mAnswerTrue;
}