为什么要TypedArray被回收？

问题描述

This回答告诉我，调用 循环（） 一个TypedArray的方法允许它被垃圾收集。我的问题是，为什么TypedArray特别需要一种方法，它是垃圾回收？为什么不能只是等待被垃圾就像一个普通的对象收集的？

This answer tells me that calling the recycle() method of a TypedArray allows for it to be garbage collected. My question is why TypedArray specifically needs a method for it to be garbage collected? Why can't it just wait to be garbage collected like a regular object?

推荐答案

这是必需的缓存purporse。当你调用循环这意味着这个对象从这点可以被重复使用。内部 TypedArray 包含几个数组所以为了不每次都分配内存时， TypedArray 用于其缓存在资源类的静态字段。你可以看一下 TypedArray.recycle（）方法code：

This is required for caching purporse. When you call recycle it means that this object can be reused from this point. Internally TypedArray contains few arrays so in order not to allocate memory each time when TypedArray is used it is cached in Resources class as static field. You can look at TypedArray.recycle() method code:

/**
 * Give back a previously retrieved StyledAttributes, for later re-use.
 */
public void recycle() {
    synchronized (mResources.mTmpValue) {
        TypedArray cached = mResources.mCachedStyledAttributes;
        if (cached == null || cached.mData.length < mData.length) {
            mXml = null;
            mResources.mCachedStyledAttributes = this;
        }
    }
}

所以，当你调用循环的 TypedArray 对象是刚返回到缓存中。

So when you call recycle your TypedArray object is just returned back to cache.

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