How to get total RAM size of a device?

Question

I want to get full RAM size of a device. memoryInfo.getTotalPss() returns 0. There is not function for get total RAM size in ActivityManager.MemoryInfo.

Answer 1

As of API level 16 you can now use the totalMem property of the MemoryInfo class.

Like this:

ActivityManager actManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
ActivityManager.MemoryInfo memInfo = new ActivityManager.MemoryInfo();
actManager.getMemoryInfo(memInfo);
long totalMemory = memInfo.totalMem;

Api level 15 and lower still requires to use the unix command as shown in cweiske's answer.