如何正确使用HashSet Android(How to use HashSet properly Android)

 我在我的应用程序中使用hashset，我试图看看如何避免泄漏内存，我使用如下所示在onActivityResult中填写它，然后当用户单击按钮时我只需处理其中的内容然后完成活动。 
 
 据我所知，内存泄漏在这里是不可能的，因为hashSet不是静态的，所以一旦Activity完成，没有任何内容会指向HashSet，当GC启动时它将是免费的，这个假设是否正确？ 
 
public class TestActivity extends Activity {


    HashSet<String> hashSet = new HashSet<String>();


        button.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                 //process what's in the hashset 
                 //do I need to do something like hashSet.clear() 
                 //or something else like setting the hashSet to null?
                //then exit
                finish();
            }
        });


    public void onActivityResult(int requestCode, int resultCode, Intent data) {

        if (requestCode == SOME_RETURN_CODE) {

            hashSet.add(some string);
        }   
    }
}

I use hashset in my app and I'm trying to see how can I avoid leaking memory,I use as shown below by filling it out inside onActivityResult, then when the user clicks the button I simply process what's in there then finish the activity. 
 
As far as I understood a memory leak isn't possible here because hashSet isn't static so as soon as the Activity finishes nothing will be pointing to the HashSet and it will be free when the GC kicks in, is this assumption correct?
 
public class TestActivity extends Activity {


    HashSet<String> hashSet = new HashSet<String>();


        button.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                 //process what's in the hashset 
                 //do I need to do something like hashSet.clear() 
                 //or something else like setting the hashSet to null?
                //then exit
                finish();
            }
        });


    public void onActivityResult(int requestCode, int resultCode, Intent data) {

        if (requestCode == SOME_RETURN_CODE) {

            hashSet.add(some string);
        }   
    }
}

原文：https://stackoverflow.com/questions/29786384