Question

当我使用https://github.com/plattysoft/Leonids中的代码实现一些效果时。有时它会发生崩溃。消息是：

FATAL EXCEPTION: main
java.lang.NullPointerException
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2911)
        at android.view.View.getDisplayList(View.java:12841)
        at android.view.View.getDisplayList(View.java:12890)
        at android.view.View.draw(View.java:13640)
        at android.view.ViewGroup.drawChild(ViewGroup.java:3050)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2912)
        at android.view.View.getDisplayList(View.java:12841)
        at android.view.View.getDisplayList(View.java:12890)
        at android.view.View.draw(View.java:13640)
        at android.view.ViewGroup.drawChild(ViewGroup.java:3050)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2912)
        at android.view.View.getDisplayList(View.java:12841)
        at android.view.View.getDisplayList(View.java:12890)
        at android.view.View.draw(View.java:13640)
        at android.view.ViewGroup.drawChild(ViewGroup.java:3050)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2912)
        at android.view.View.getDisplayList(View.java:12841)
        at android.view.View.getDisplayList(View.java:12890)
        at android.view.View.draw(View.java:13640)
        at android.view.ViewGroup.drawChild(ViewGroup.java:3050)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2912)
        at android.view.View.draw(View.java:13947)
        at android.widget.FrameLayout.draw(FrameLayout.java:467)
        at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:2247)
        at android.view.View.getDisplayList(View.java:12846)
        at android.view.View.getDisplayList(View.java:12890)
        at android.view.HardwareRenderer$GlRenderer.draw(HardwareRenderer.java:1249)
        at android.view.ViewRootImpl.draw(ViewRootImpl.java:2567)
        at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2434)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2236)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1211)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5039)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:776)
        at android.view.Choreographer.doCallbacks(Choreographer.java:579)
        at android.view.Choreographer.doFrame(Choreographer.java:548)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:762)
        at android.os.Handler.handleCallback(Handler.java:800)
        at android.os.Handler.dispatchMessage(Handler.java:100)
        at android.os.Looper.loop(Looper.java:194)
        at android.app.ActivityThread.main(ActivityThread.java:5433)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:525)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:922)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:689)
        at dalvik.system.NativeStart.main(Native Method)

没有任何有用的消息。我甚至使用这样的try catch块：

   try
    {
        configureEmiter(emiter, gravity);
        startEmiting(particlesPerSecond);
    }catch (NullPointerException e){

    }
    catch (Exception e){

    }

但它不起作用。有什么想法解决这个问题吗？请帮助我，非常感谢。

Answer 1

我的代码中有一些错误。我已删除视图导致问题。感谢您的关注和答案。

dispatchDraw NullPointerException没有任何有用的错误消息

1 个答案: