Question

11-23 10:38:04.430 2095-2095/? I/art: Not late-enabling -Xcheck:jni (already on)
11-23 10:38:04.430 2095-2095/? I/art: Late-enabling JIT
11-23 10:38:04.433 2095-2095/? I/art: JIT created with code_cache_capacity=2MB compile_threshold=1000
11-23 10:38:04.830 2095-2095/com.example.somanshusrivastava.carpiko W/System: ClassLoader referenced unknown path: /data/app/com.example.somanshusrivastava.carpiko-2/lib/x86
11-23 10:38:05.697 2095-2106/com.example.somanshusrivastava.carpiko I/art: Background partial concurrent mark sweep GC freed 96(3KB) AllocSpace objects, 0(0B) LOS objects, 7% free, 50MB/54MB, paused 2.581ms total 140.616ms
11-23 10:38:05.812 2095-2095/com.example.somanshusrivastava.carpiko I/art: Starting a blocking GC Alloc
11-23 10:38:05.812 2095-2095/com.example.somanshusrivastava.carpiko I/art: Starting a blocking GC Alloc
11-23 10:38:05.827 2095-2095/com.example.somanshusrivastava.carpiko I/art: Alloc sticky concurrent mark sweep GC freed 79(11KB) AllocSpace objects, 0(0B) LOS objects, 7% free, 50MB/54MB, paused 5.901ms total 13.614ms
11-23 10:38:05.836 2095-2095/com.example.somanshusrivastava.carpiko I/art: Starting a blocking GC Alloc
11-23 10:38:05.850 2095-2095/com.example.somanshusrivastava.carpiko I/art: Alloc partial concurrent mark sweep GC freed 23(1008B) AllocSpace objects, 0(0B) LOS objects, 7% free, 50MB/54MB, paused 2.153ms total 10.247ms
11-23 10:38:05.853 2095-2095/com.example.somanshusrivastava.carpiko I/art: Starting a blocking GC Alloc
11-23 10:38:05.867 2095-2095/com.example.somanshusrivastava.carpiko I/art: Alloc concurrent mark sweep GC freed 15(12KB) AllocSpace objects, 0(0B) LOS objects, 7% free, 50MB/54MB, paused 1.431ms total 13.789ms
11-23 10:38:05.868 2095-2095/com.example.somanshusrivastava.carpiko I/art: Forcing collection of SoftReferences for 49MB allocation
11-23 10:38:05.869 2095-2095/com.example.somanshusrivastava.carpiko I/art: Starting a blocking GC Alloc
11-23 10:38:05.881 2095-2095/com.example.somanshusrivastava.carpiko I/art: Alloc concurrent mark sweep GC freed 11(344B) AllocSpace objects, 0(0B) LOS objects, 7% free, 50MB/54MB, paused 1.407ms total 11.758ms
11-23 10:38:05.882 2095-2095/com.example.somanshusrivastava.carpiko W/art: Throwing OutOfMemoryError "Failed to allocate a 51750048 byte allocation with 4194304 free bytes and 13MB until OOM"
11-23 10:38:05.882 2095-2095/com.example.somanshusrivastava.carpiko I/art: Starting a blocking GC Alloc
11-23 10:38:05.882 2095-2095/com.example.somanshusrivastava.carpiko I/art: Starting a blocking GC Alloc
11-23 10:38:05.892 2095-2095/com.example.somanshusrivastava.carpiko I/art: Alloc sticky concurrent mark sweep GC freed 3(608B) AllocSpace objects, 0(0B) LOS objects, 7% free, 50MB/54MB, paused 1.389ms total 8.964ms
11-23 10:38:05.894 2095-2095/com.example.somanshusrivastava.carpiko I/art: Starting a blocking GC Alloc
11-23 10:38:05.903 2095-2095/com.example.somanshusrivastava.carpiko I/art: Alloc partial concurrent mark sweep GC freed 6(192B) AllocSpace objects, 0(0B) LOS objects, 7% free, 50MB/54MB, paused 1.387ms total 8.867ms
11-23 10:38:05.904 2095-2095/com.example.somanshusrivastava.carpiko I/art: Starting a blocking GC Alloc
11-23 10:38:05.916 2095-2095/com.example.somanshusrivastava.carpiko I/art: Alloc concurrent mark sweep GC freed 3(96B) AllocSpace objects, 0(0B) LOS objects, 7% free, 50MB/54MB, paused 1.416ms total 10.922ms
11-23 10:38:05.917 2095-2095/com.example.somanshusrivastava.carpiko I/art: Forcing collection of SoftReferences for 49MB allocation
11-23 10:38:05.917 2095-2095/com.example.somanshusrivastava.carpiko I/art: Starting a blocking GC Alloc
11-23 10:38:05.928 2095-2095/com.example.somanshusrivastava.carpiko I/art: Alloc concurrent mark sweep GC freed 3(96B) AllocSpace objects, 0(0B) LOS objects, 7% free, 50MB/54MB, paused 1.350ms total 10.018ms
11-23 10:38:05.929 2095-2095/com.example.somanshusrivastava.carpiko W/art: Throwing OutOfMemoryError "Failed to allocate a 51750048 byte allocation with 4194304 free bytes and 13MB until OOM"
11-23 10:38:05.929 2095-2095/com.example.somanshusrivastava.carpiko D/skia: --- allocation failed for scaled bitmap
11-23 10:38:05.930 2095-2095/com.example.somanshusrivastava.carpiko D/AndroidRuntime: Shutting down VM
11-23 10:38:05.930 2095-2095/com.example.somanshusrivastava.carpiko E/AndroidRuntime: FATAL EXCEPTION: main
                                                                                      Process: com.example.somanshusrivastava.carpiko, PID: 2095
                                                                                      java.lang.OutOfMemoryError: Failed to allocate a 51750048 byte allocation with 4194304 free bytes and 13MB until OOM
                                                                                          at dalvik.system.VMRuntime.newNonMovableArray(Native Method)
                                                                                          at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
                                                                                          at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:609)
                                                                                          at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:444)
                                                                                          at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:1080)
                                                                                          at android.content.res.Resources.loadDrawableForCookie(Resources.java:2635)
                                                                                          at android.content.res.Resources.loadDrawable(Resources.java:2540)
                                                                                          at android.content.res.TypedArray.getDrawable(TypedArray.java:870)
                                                                                          at android.widget.ImageView.(ImageView.java:152)
                                                                                          at android.widget.ImageView.(ImageView.java:140)
                                                                                          at android.support.v7.widget.AppCompatImageView.(AppCompatImageView.java:58)
                                                                                          at android.support.v7.widget.AppCompatImageView.(AppCompatImageView.java:54)
                                                                                          at android.support.v7.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:95)
                                                                                          at android.support.v7.app.AppCompatDelegateImplV7.createView(AppCompatDelegateImplV7.java:938)
                                                                                          at android.support.v7.app.AppCompatDelegateImplV7.onCreateView(AppCompatDelegateImplV7.java:992)
                                                                                          at android.support.v4.view.LayoutInflaterCompatHC$FactoryWrapperHC.onCreateView(LayoutInflaterCompatHC.java:44)
                                                                                          at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:746)
                                                                                          at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
                                                                                          at android.view.LayoutInflater.rInflate(LayoutInflater.java:835)
                                                                                          at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
                                                                                          at android.view.LayoutInflater.rInflate(LayoutInflater.java:838)
                                                                                          at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
                                                                                          at android.view.LayoutInflater.parseInclude(LayoutInflater.java:971)
                                                                                          at android.view.LayoutInflater.rInflate(LayoutInflater.java:831)
                                                                                          at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
                                                                                          at android.view.LayoutInflater.parseInclude(LayoutInflater.java:971)
                                                                                          at android.view.LayoutInflater.rInflate(LayoutInflater.java:831)
                                                                                          at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
                                                                                          at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
                                                                                          at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
                                                                                          at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
                                                                                          at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:256)
                                                                                          at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109)
                                                                                          at com.example.somanshusrivastava.carpiko.MainActivity.onCreate(MainActivity.java:24)
                                                                                          at android.app.Activity.performCreate(Activity.java:6237)
                                                                                          at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
                                                                                          at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
                                                                                          at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
                                                                                          at android.app.ActivityThread.-wrap11(ActivityThread.java)
                                                                                          at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
                                                                                          at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                                          at android.os.Looper.loop(Looper.java:148)
                                                                                          at android.app.ActivityThread.main(ActivityThread.java:5417)
                                                                                          at java.lang.reflect.Method.invoke(Native Method)
                                                                                          at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                                                                                          at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
11-23 10:38:07.560 2095-2102/com.example.somanshusrivastava.carpiko W/art: Suspending all threads took: 13.233ms
11-23 10:38:09.537 2095-2102/com.example.somanshusrivastava.carpiko W/art: Suspending all threads took: 9.664ms
11-23 10:38:11.140 2095-2095/? I/Process: Sending signal. PID: 2095 SIG: 9

每当我尝试运行 AVD 时，我的应用程序意外关闭，这就是我得到的错误。这是生成的logcat。它显示FatalException和MemoryException。是AVD错误还是代码错误？请帮忙。

Answer 1

您需要了解位图和内存的概念

假设您要在屏幕上显示刚用相机拍摄的图像。使用以下公式计算所需的总内存：memory_needed_in_bytes = 4 * image_width * image_height;

为什么4？嗯，最常见/推荐的位图配置是ARGB_8888。这意味着对于我们绘制的每个像素，我们需要为内存中的alpha，红色，贪婪和蓝色通道保留8位（1个字节），以便正确显示它。有一些替代品，比如RGB_565配置需要一半的内存而不是ARGB_8888，但是会失去透明度和颜色精度（可能会添加绿色）。

假设您拥有一台全高清屏幕和12万像素摄像头的全新设备。您拍摄的图片大小为4000x3000像素，显示所需的总内存为：4字节* 4000 * 3000 = 48 MB

单个图像的48兆字节的RAM！？那太多了！

现在让我们考虑屏幕分辨率。您试图在1920x1080像素的屏幕上显示4000x3000图像，在最坏的情况下（显示图像全屏），您不应分配超过4 * 1920 * 1080 = 8.3 MB的内存。

始终遵循有效显示位图的Android编程技巧：

测量您正在显示图像的视图。   相应地缩放/裁剪大图像。   只显示可以显示的内容。

Answer 2

抛出的异常称为OutOfMemoryError。当（显然）你的内存不足时会发生错误！这是它的文档：

在使用可用平台资源无法满足内存请求时抛出此异常。这样的请求可以由正在运行的应用程序或VM的内部功能进行。

此处提供更多信息：

http://developer.android.com/reference/java/lang/OutOfMemoryError.html

因此，您应该为模拟器分配更多内存。但我认为主要原因是你的应用程序使用了太多内存。你使用超大图像吗？

Answer 3

android：largeHeap =“ true”

您不应使用此功能，这不是针对此问题的解决方案，这是临时的问题解决方案。这样做是为了增加模拟器/电话的内存，它可以工作，但最终会因为您没有解决内存问题而再次崩溃

Answer 4

将此ligne添加到清单文件中

 android:largeHeap="true"

Answer 5

如果您使用的是RXJAVA，并且仅观察到“单一”可观察类型，那么在您发射大量图像或任何类型的数据集时，这种情况就很容易发生：

尝试在.subscribe之前使用toFlowable

https://medium.com/@gabrieldemattosleon/fundamentals-of-rxjava-with-kotlin-for-absolute-beginners-3d811350b701

获得此异常会强制Android应用程序在启动时崩溃

5 个答案: