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Dump the Android application heap if an out of memory crash occured

Solution overview

The idea is to store the application heap if an out of memory error happens. The HPROF file can be then analyzed using Eclipse Memory Analyzer Tool that I will present later.

Step 1: Create a class that implements Thread.UncaughtExceptionHandler

The implemented method uncaughtException will check if the exception is out of memory and if it's the case, the HPROF file will be dumped in the device storage.

Step 2: Set the uncaught exception handler the thread we want to create the heap dump

It's very sample, we can either set the uncaught exception handler to the main thread:

Or, to any running thread:

Step 3: Create a memory leaked code to invoke an out of memory exception

For example, by doing:

Step 4: Analyze the HPROF file to fix the memory leak

Eclipse Memory Analyzer tool can be used to analyze the dumped heap, I will present the method in a separate article.

Source code

The Activity code is the following and the sample source code can be found on Github.

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