Java tutorial
//package com.java2s; import android.os.Environment; import android.os.StatFs; import java.io.File; public class Main { public static long getTotalInternalMemorySize() { File path = Environment.getDataDirectory(); StatFs stat = new StatFs(path.getPath()); long blockSize = (long) stat.getBlockSize(); long totalBlocks = (long) stat.getBlockCount(); return totalBlocks * blockSize; } }