android 内存不足导致内存泄露,android - ArrayList.add（）导致内存不足错误？ - 堆栈内存溢出...

今天，我第一次遇到内存不足错误。 我试图计算一些数据到ArrayList中的移动平均值，并且在第一步.add()时崩溃了。 方法如下所示

public ArrayList getNdaySMA(List history, int range){

long sum =0;

long SMA = 0;

ArrayList SMAs = new ArrayList();

//realRange is made due to the differences in defining "range in calculation vs speech

//a 10 day range for day 9 is actually from prices of day0 to day9, inclusive

int realRange =range-1;

//First step, add in placeholder 0s for the days within the range that have no value

//so if 10 day range, we have 0-> 9

for (int i=0;i

SMAs.add(i,0L);

}

//Next, actually calculate the SMAs for i.e. day 10

for (int i =0;i

//should be k<10, 0......9 = 10 days

for(int k=i+realRange;k==i;k--){

//Sum first from k=i+range-1 , go down to i.

//This should give us a value of RANGE

sum +=history.get(k).getClose().longValue();

}

//after summing up, we add calculate SMA and add it to list of SMAs

SMA = sum/range;

//we add the corresponding SMA to index i+range, made up of values calculated from before it

//to excel

SMAs.add(i+realRange,SMA);

sum =0;

}

return SMAs;

}

stacktrace如下

java.lang.OutOfMemoryError

at java.util.ArrayList.add(ArrayList.java:154)

at com.xu.investo.MethodDatabase.getNdaySMA(MethodDatabase.java:46)

第46行指的是

SMAs.add(i,0L);

是否由于使用长数字格式而发生此错误？ 欢迎任何建议。