how to check for memory leaks

One common difficulty in Android programming is to coordinate the activity's life cycle and long-running tasks (Task), and to avoid possible memory leaks. Consider the code of activity below to open a thread and loop through the task as it starts.1/**2 * An example of how a thread can survive configuration changes (configuration changes will cause the activity of the Gen 3 * thread to be destroyed). The ac

JProfilerThe memory View session provides a dynamic update view of memory usage and an Information view of the allocation point. All views have several clustering layers and can display existing objects and objects as garbage collection objects. This article describes how to realizeMemory leakageAnd several methods to find memory

Although Java has GC garbage auto-recycling, it doesn't mean that Java programs will not have memory leaks. If an object is nowhere to be used, but there is still a reference pointing to him, then the garbage collector cannot recycle him, which is a memory leak. Such leaks can be transient (that is, the program runs fo

In the Java language, there are two criteria for determining whether a single memory space meets the garbage back: First: Give the object a null value NULL, no longer be used; Second: The object is given a new value and the memory space is reassigned. Generally speaking, there are two main types of memory leaks: One wa

keeps the stack frame alive). Thus, circular references between objects with __del__ () functions are the main culprits that cause memory leaks .Also note that a circular reference to a Python object that does not have a __del__ () function can be recycled by automatic garbage . How do you know if an object has a memory leak? Method First, when you think an o

There are a number of reasons why Android memory leaks, listed below, will be addressed in the future1. No cache Convertview (derived from ListView optimization problem) when constructing adapter2. Query database cursor is not closed3. Activity life cycle object is greater than activity life cycle (about application context and activity context)4, Bitmap object is not used when not recycle off (there are ot

Sdwebimage's popularity is needless to say, on GitHub near 10k star, too many apps at home and abroad use it for picture loading.But recently in the use of the process found that in the UITableView load more content, the use of sdwebimage will cause memory consumption is more and more large, resulting in memories Warning final terminate, a little to find the cause of the problem, Found that many developers have encountered this problem, the Chinese da

memory leaks in blockIn our code about the use of blocks can be said everywhere, the first time to contact the block is about the UIView animation, then feel that the use of block magic, and then the analysis of the block is actually a C language function, but we can call this function at any place. With this understanding, I began to use block frequently. After doing the project found that the use of block

Android development often uses Handler, but we find that every use of Handler appears: This Handler class should be static or leaks might occur (null). Android Lint is intended to prompt us, so using handler can easily cause memory leaks. But you will find it useless to change to static. Because it doesn't solve the problem at all.First, we have to confirm why th

First introduce how to find out, the line of the project log is through the logging module to the Syslog, ran for a period of time to find the syslog UDP connection over 8W, yes 8 W. The main logging module is wrong. One of the requirements we had before is to output the current connection information for each connection log, so each connection creates a log instance, assigns a Formatter, and creates a log instance in order to differentiate the other connections so I simply rudely use the ID of

Problem Description:The Handler inner class holds a reference to the external class activity, and if the activity exits and the message that Handler has deferred processing is not processed, the activity will not be recycled, which can cause memory leaks repeatedly.Solution:　　　　1, OnDestroy when the message is purged.Mhandler.removecallbacksandmessages (NULL); All messages are cleared when the parameter is

) The code involved in the JNI layer, because the JNI layer is written in C + +, you need to manage the allocation/recycling of memory, so be careful.So what is the effective way to detect memory usage and memory leaks in Android development?Here are three ways to focus:1. Log information of the programWhen the program

In this article, he will explain another form of the Reference object, the soft reference (soft references), to help the garbage collector manage memory usage and eliminate potential memory leaks. Garbage collection makes it possible for Java programs to have no memory leaks