How to get Android version and device RAM size?

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I’m developing an app that checks Versao Android and Memory Ram Size.

How can I get this information?

android

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Android version can be obtained through the class Build.VERSION.

String release = Build.VERSION.RELEASE;

Values, in Mb, relative to RAM can be obtained thus: 

ActivityManager.MemoryInfo mi = new ActivityManager.MemoryInfo();
ActivityManager activityManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
activityManager.getMemoryInfo(mi);
long memoriaLivre = mi.availMem / 1048576L;
long memoriaTotal = mi.totalMem / 1048576L;
long memoriaEmUso = totalMemory - freeMemory;

The value of totalMem is the total memory available to the kernel, which is approximately equal to the total RAM.

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