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Activity 中开启轮询服务当Activity异常destroy时 - MayGodBlessYou
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<h1>Activity 中开启轮询服务当Activity异常destroy时</h1>
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<span class="date">2016/05/30</span>
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<p>当你点击系统的back键，当前Activity开启的轮询服务刚好此时开启运行，即走onStartCommand，这里Activity用Intent传递给该服务的所有参数会为null。</p>
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<p>Activity此时已经异常destroy了，此时传递给Service的Intent的参数不会传递成功。所以这里如果你在Service的onStartCommand里用到了Intent传递过来的参数，则需要先判空，否则可能出现空指针异常。</p>
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