Java应用程序-从文本文件读取值，添加到arraylist

Question

I'm working on a multiple choice quiz application in Android Studio, and inside a text file I have the answers to each question, as well as their corresponding questions. This is my first attempt at such a task, so apologies in advance for code that may be considered sloppy.

This is what I have for my text file:

Java, What language is most commonly used for Android application development?

Android Studio/Eclipse, Which of these programs is often used for Android application development?

2005, In what year did Google acquire Android?

(There are several more, but this should get the point across.)

The first string before the comma is what I'm trying to add to arrayListTerms, and the string following the comma to arrayListDef. Here's my code so far:

    public class ActivityTwo extends AppCompatActivity {
int sizeOfArray;
String[][] qAndA;//Stores Questions and Answers
String[] temp;
ArrayList<String>arrayListTerms;
ArrayList<String>arrayListDef;
HashMap<String, String> qMatch = new HashMap<>();//Matches correct answer with current question
public static final String TAG =" ";

public ActivityTwo() {
    arrayListDef = new ArrayList<>();
    arrayListTerms = new ArrayList<>();
}

@Override
protected void onCreate(Bundle savedInstanceState) {

    try {
        InputStream myInputStream = this.getResources().openRawResource(R.raw.textfile);
        BufferedReader myBufferedReader = new BufferedReader(new InputStreamReader(myInputStream));
        String str = myBufferedReader.readLine();

        while((str != null)) {
            temp = str.split(",");
            arrayListTerms.add(temp[0]);
            arrayListDef.add(temp[1]);
            //qMatch.put(temp[1], temp[0]);

        }
        Log.i(TAG, "Textfile Loaded.");
        myBufferedReader.close();
    } catch (FileNotFoundException ex) {
        Log.e(TAG, "Unable to open text file.");
    } catch (IOException ex){
        Log.e(TAG, "Error reading text file.");
}

    Collections.shuffle(arrayListDef);
    sizeOfArray = arrayListDef.size();

Answer 1

尝试使用file.io读取文件，将其指向该位置，然后应该可以将输入的内容更新到数组列表中。

Answer 2

Change

while((str != null)) {
            temp = str.split(",");
            arrayListTerms.add(temp[0]);
            arrayListDef.add(temp[1]);
            //qMatch.put(temp[1], temp[0]);

        }

To

String line = "";
    while((line = str) != null) {
                temp = line.split(",");
                arrayListTerms.add(temp[0]);
                arrayListDef.add(temp[1].trim()); //eliminate space after ','
                //qMatch.put(temp[1], temp[0]);

            }

You need to initialize an empty string then fill it in the while condition.