坑坑的onRestoreInstanceState

参考:http://hukai.me/android-activitylifecycle-onsaveinstancestate/ 该文核心大意是: onSaveInstanceState与onRestoreInstanceState的调用时机： 只要某个Activity是做入栈并且非栈顶时（启动跳转其他Activity或者点击Home按钮），此Activity是需要调用onSaveInstanc

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