android sdk能在你完成之前释放你的内存吗？

我的应用程序在google play上收到崩溃报告。我听说android可以释放你的内存，这是真的吗

我在下一行得到一个

NullPointerException

错误

if (butSettings.Intersect(x, y))

我假设

butSettings

为

null

我很困惑，因为

butsettings

是在

onCreate

上设置的。然后在

onUpdate

上调用它的成员函数，每隔.1秒调用一次

线

在my

onTouch

事件中。所以我假设

butSettings

成员函数会在

onDraw

中被调用。那么，为什么这会变成一个

null

？？安卓能释放它吗

来自google的堆栈跟踪

java.lang.NullPointerException
at com.fairhvaenapps.toddpuzzlefree.cMainView.onTouchEvent(cMainView.java:267)
at android.view.View.dispatchTouchEvent(View.java:5588)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1684)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1684)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1684)
at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2060)
at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1398)
at android.app.Activity.dispatchTouchEvent(Activity.java:2364)
at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2008)
at android.view.View.dispatchPointerEvent(View.java:5768)
at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:2911)
at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2485)
at android.view.ViewRootImpl.processInputEvents(ViewRootImpl.java:852)
at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2494)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4514)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
at dalvik.system.NativeStart.main(Native Method)

---

Android可以随时破坏您的活动，这就是为什么您必须在

onCreate

中正确地进行初始化，并在

onDestroy

中正确地处理东西的原因。但是，您永远不会因此而产生

NullPointerException

；Android不会因此而简单地删除对对象的引用。您看到的异常是由于代码中的某些错误。这与记忆无关

java.lang.NullPointerException
at com.fairhvaenapps.toddpuzzlefree.cMainView.onTouchEvent(cMainView.java:267)
at android.view.View.dispatchTouchEvent(View.java:5588)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1684)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1684)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1684)
at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2060)
at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1398)
at android.app.Activity.dispatchTouchEvent(Activity.java:2364)
at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2008)
at android.view.View.dispatchPointerEvent(View.java:5768)
at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:2911)
at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2485)
at android.view.ViewRootImpl.processInputEvents(ViewRootImpl.java:852)
at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2494)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4514)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
at dalvik.system.NativeStart.main(Native Method)