SaSdcardUtils.java

package com.martin.simpledevelop.utils.sdcard;

import java.io.File;

import android.os.Environment;
import android.os.StatFs;

import com.martin.simpledevelop.utils.log.SaLogUtils;

/**
 * @Description 内存卡 工具类<br>
 * @File SaSdcardUtils.java
 * @Package com.martin.simpledevelop.utils.sdcard
 * @Date 2015年6月26日上午1:23:35
 * @Author Donghongyu 1358506549@qq.com
 * @Version v1.0.0
 */
public class SaSdcardUtils {
	/**
	 * Log 输出标签
	 */
	public static String TAG = SaSdcardUtils.class.getName();

	/**
	 * 判断SDCard是否可用
	 * 
	 * @return
	 */
	public static boolean isSDCardEnable() {
		boolean result = Environment.getExternalStorageState().equals(
				Environment.MEDIA_MOUNTED);
		if (result)
			SaLogUtils.i(TAG,"当前内存卡有效");
		else
			SaLogUtils.i(TAG,"当前内存卡无效");
		return result;
	}

	/**
	 * 获取SD卡路径
	 * 
	 * @return
	 */
	public static String getSDCardPath() {
		String path = Environment.getExternalStorageDirectory()
				.getAbsolutePath() + File.separator;
		SaLogUtils.i(TAG,"当前内存卡路径" + path);
		return path;
	}

	/**
	 * 获取SD卡的剩余容量 单位byte
	 * 
	 * @return
	 */
	public static long getSDCardAllSize() {
		if (isSDCardEnable()) {
			StatFs stat = new StatFs(getSDCardPath());
			// 获取空闲的数据块的数量
			@SuppressWarnings("deprecation")
			long availableBlocks = (long) stat.getAvailableBlocks() - 4;
			// 获取单个数据块的大小（byte）
			@SuppressWarnings("deprecation")
			long freeBlocks = stat.getAvailableBlocks();
			long result = freeBlocks * availableBlocks;
			SaLogUtils.i(TAG,"当前内存卡的容量：" + result);
			return result;
		}
		return 0;
	}

	/**
	 * 获取系统存储路径
	 * 
	 * @return
	 */
	public static String getRootDirectoryPath() {
		String path = Environment.getRootDirectory().getAbsolutePath();
		SaLogUtils.i(TAG,"当前存储路径：" + path);
		return path;
	}
}