Android Studio没有看到ArrayList类 [英] Android Studio doesn't see ArrayList class

问题描述

Android Studio 0.5.1没有看到ArrayList类.快速定义建议我创建一个新的. 即使我尝试导入java.util.ArrayList;

Android Studio 0.5.1 doesn't see ArrayList class. Quick Definition suggest me create a new one. Even when I try to import java.util.ArrayList;

仅当我设置了import java.util.*;时它才起作用，但是快速定义仍然看不到.

It works only if I set import java.util.*;, but Quick Definition still doesn't see.

import android.app.Activity;
import android.os.Bundle;
import java.util.*;
public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ArrayList<String> arrayList = new ArrayList<String>();
        ArrayList<Integer> i;
    }
}

推荐答案

我认为您应该尝试升级Android Studio. 0.5.1确实很老，而且AFAIK的早期版本中充满了错误.较新的版本要好得多，但仍然存在一些错误.

I think you should try upgrading your Android Studio. 0.5.1 is really old and AFAIK, earlier versions were filled with bugs. Newer versions are a lot better, but still some bugs.

否则，关于ArrayList的代码没有任何问题.

Otherwise, there is nothing wrong with your code regarding ArrayList.

这篇关于Android Studio没有看到ArrayList类的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！