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Handler #13

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ibosong opened this issue May 19, 2017 · 0 comments

ibosong commented May 19, 2017

Handler机制有一个特点是不会随着Activity、Service的生命周期结束而结束。也就是说，如果你Post了一个Delay的Runnable，然后在Runnable执行之前退出了Activity，Runnable到时间之后还是要执行的。如果Runnable里面包含更新View的操作，程序崩溃了。

Runnable里强引用到View，会阻止Activity或Service销毁，在Runnable执行完之后才会销毁，所以造成内存泄露。而如果引用的View是使用WeakReference才会有崩溃的情况，需要判断View是否为null

jiang111 closed this as completed in

e17af0b

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