嘿，伙计们，我正在开发一个测验，其中我使用 json 数组随机存储了 50 个问题，现在我的问题是每次用户玩游戏时都会显示所有这 50 个问题。如果我只想显示 10 个问题，是否可以限制它们？...我存储了 50 个问题，因为它是随机选择的，但我只想显示 10 个。请帮帮我。非常感谢！
public class Question1<JsonObject> extends Activity {
Intent menu = null;
BufferedReader bReader = null;
static JSONArray quesList = null;
static int index = 50;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.question10);
Thread thread = new Thread() {
public void run() {
try {
Thread.sleep(1 * 1000);
finish();
loadQuestions();
Intent intent = new Intent(Question1.this,
Question2.class);
Question1.this.startActivity(intent);
} catch (Exception e) {
}
}
};
thread.start();
}
private void loadQuestions() throws Exception {
try {
List<JSONObject> question = new ArrayList<JSONObject>();
int n = Math.min(10, quesList.length());
for(int i = 0; i < n; i++) {
JSONObject questions1 = quesList.getJSONObject(i);
question.add(questions1);
InputStream questions = this.getBaseContext().getResources()
.openRawResource(R.raw.questions);
bReader = new BufferedReader(new InputStreamReader(questions));
StringBuilder quesString = new StringBuilder();
String aJsonLine = null;
while ((aJsonLine = bReader.readLine()) != null) {
quesString.append(aJsonLine);
}
Log.d(this.getClass().toString(), quesString.toString());
JSONObject quesObj = new JSONObject(quesString.toString());
quesList = quesObj.getJSONArray("Questions");
Log.d(this.getClass().getName(),
"Num Questions " + quesList.length());
}
} catch (Exception e) {
} finally {
try {
bReader.close();
} catch (Exception e) {
Log.e("", e.getMessage().toString(), e.getCause());
}
}
}
public static JSONArray getQuesList()throws JSONException{
Random rnd = new Random();
for (int i = quesList.length() - 1; i >= 0; i--)
{
int j = rnd.nextInt(i + 1);
// Simple swap
Object object = quesList.get(j);
quesList.put(j, quesList.get(i));
quesList.put(i, object);
}
return quesList;
}