我不知道为什么我无法从另一个类获取ArrayList。
第一个类中的方法获取ArrayList并将文本设置为四个TextView。
private void GameStart() {
ActivityStartGame startGame = new ActivityStartGame();
startGame.GameStart();
ArrayList<String> getWordList = startGame.getPutWords();
String[] putWords = new String[getWordList.size()];
for (int i = 0; i < getWordList.size(); i++) {
putWords[i] = getWordList.get(i);
}
txtSelect1.setText(putWords[1]);
txtSelect2.setText(putWords[2]);
txtSelect3.setText(putWords[3]);
txtSelect4.setText(putWords[4]);
}
第二个类在四个随机位置创建四个随机单词
private String[] wordsEnglish = new String[] { "A", "B", "C",
"D", "E", "F", "G", "H", "I" };
private String[] wordsFarsi = new String[] { "4", "3", "2", "1",
"9", "8", "7", "6", "5" };
private ArrayList<Integer> chosenWordNumbers = new ArrayList<Integer>();
private ArrayList<String> putWords = new ArrayList<String>();
public void GameStart() {
Thread thread = new Thread(new Runnable() {
@Override
public void run() {
doStart();
}
private void doStart() {
if (!part1) {
randomNumber = (int) (Math.random() * wordsEnglish.length);
currentwordFarsi = wordsFarsi[randomNumber];
currentwordEnglish = wordsEnglish[randomNumber];
answer1 = wordsFarsi[randomNumber];
putSelect();
putWords.add(randomNumberSelect, answer1);
part1 = true;
}
if (!part2) {
randomNumber = (int) (Math.random() * wordsFarsi.length);
currentwordFarsi = wordsFarsi[randomNumber];
if (answer1 == currentwordFarsi) {
GameStart();
}
answer2 = wordsFarsi[randomNumber];
putSelect();
putWords.add(randomNumberSelect, answer2);
part2 = true;
}
if (!part3) {
randomNumber = (int) (Math.random() * wordsFarsi.length);
currentwordFarsi = wordsFarsi[randomNumber];
if (answer1 == currentwordFarsi) {
GameStart();
} else if (answer2 == currentwordFarsi) {
GameStart();
}
answer3 = wordsFarsi[randomNumber];
putSelect();
putWords.add(randomNumberSelect, answer3);
part3 = true;
}
if (!part4) {
randomNumber = (int) (Math.random() * wordsFarsi.length);
currentwordFarsi = wordsFarsi[randomNumber];
if (answer1 == currentwordFarsi) {
GameStart();
} else if (answer2 == currentwordFarsi) {
GameStart();
} else if (answer3 == currentwordFarsi) {
GameStart();
}
answer4 = wordsFarsi[randomNumber];
putSelect();
putWords.add(randomNumberSelect, answer4);
part4 = true;
}
thread.start();
}
private void putSelect() {
do {
randomNumberSelect = (int) ((Math.random() * 4) + 1);
if (!chosenWordNumbers.contains(randomNumberSelect)) {
chosenWordNumbers.add(randomNumberSelect,
randomNumberSelect);
break;
}
} while (true);
}
});
}
public ArrayList<String> getPutWords() {
return putWords;
}
这是我写的代码。我遇到错误，我不知道我的问题是在获取 ArrayList 还是在第二个类中创建 ArrayList。
编辑:我检查了...我的问题出在第二类的 putSelect 方法中!
最佳答案
在我看来，您想要分配文本的第一个类的 putWords 索引有错误。您尝试访问索引 1 到 4..但是大小为 4 的数组的索引为 0 到 3。
关于java - 我无法从另一个类获取 arrayList，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/33070821/