android 总内存和可用内存大小显示

private String getAvailMemory() {// 获取android当前可用内存大小

		ActivityManager am = (ActivityManager) getActivity().getSystemService(
				Context.ACTIVITY_SERVICE);
		MemoryInfo mi = new MemoryInfo();
		am.getMemoryInfo(mi);
		// mi.availMem; 当前系统的可用内存

		return Formatter.formatFileSize(getActivity().getBaseContext(),
				mi.availMem);// 将获取的内存大小规格化
	}

	// 获取手机总内存
	private String getTotalMemory() {
		String str1 = "/proc/meminfo";// 系统内存信息文件
		String str2;
		String[] arrayOfString;
		long initial_memory = 0;

		try {
			FileReader localFileReader = new FileReader(str1);
			BufferedReader localBufferedReader = new BufferedReader(
					localFileReader, 8192);
			str2 = localBufferedReader.readLine();// 读取meminfo第一行，系统总内存大小

			arrayOfString = str2.split("\\s+");
			for (String num : arrayOfString) {
				Log.i(str2, num + "\t");
			}

			initial_memory = Integer.valueOf(arrayOfString[1]).intValue() * 1024;// 获得系统总内存，单位是KB，乘以1024转换为Byte
			localBufferedReader.close();

		} catch (IOException e) {
		}
		return Formatter.formatFileSize(getActivity().getBaseContext(),
				initial_memory);// Byte转换为KB或者MB，内存大小规格化
	}