1.生命周期
? OnCreate->OnStart->OnStop->OnPause->OnResuse->OnDestory
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2.Service
? IntentService; Android的主进程尽可能的保留Service;避免内存的消耗
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3.存储
? Sqlite,ContentProvider,SharePreferences,网络(3G/wifi...)
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4.ANS
?ApplicationNotRespoding,应用层5秒，BrocadcastReceiver在10秒无反应，主进程会予以提示
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?5.内存限制大小
ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);activityManager.getMemoryClass();
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