【Android】查看手机内存运行情况

查看手机内存运行情况：

    final ActivityManager activityManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);private void displayBriefMemory() {if (activityManager != null) {ActivityManager.MemoryInfo info = new ActivityManager.MemoryInfo();activityManager.getMemoryInfo(info);Log.i(tag,"系统总内存:" + getFormatSize(info.totalMem));Log.i(tag,"系统剩余内存:" + getFormatSize(info.availMem)+ ", 是否处于低内存运行：" + info.lowMemory);Log.i(tag,"系统是否处于低内存运行：" + info.lowMemory);Log.i(tag,"系统剩余内存低于 " + getFormatSize(info.threshold) + " 时视为低内存运行");} else {Log.e(tag, "activityManager is null");}}public static String getFormatSize(double size) {double kiloByte = size / 1024;if (kiloByte < 1) {return size + "Byte";}double megaByte = kiloByte / 1024;if (megaByte < 1) {BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));return result1.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "KB";}double gigaByte = megaByte / 1024;if (gigaByte < 1) {BigDecimal result2 = new BigDecimal(Double.toString(megaByte));return result2.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "MB";}double teraBytes = gigaByte / 1024;if (teraBytes < 1) {BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));return result3.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "GB";}BigDecimal result4 = new BigDecimal(teraBytes);return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString()+ "TB";}

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