import java.io.File;import android.os.Environment;import android.os.StatFs;//SD卡相关的辅助类public class SDCardUtils{private SDCardUtils(){/* cannot be instantiated */throw new UnsupportedOperationException("cannot be instantiated");}/** * 判断SDCard是否可用 * * @return */public static boolean isSDCardEnable(){return Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);}/** * 获取SD卡路径 * * @return */public static String getSDCardPath(){return Environment.getExternalStorageDirectory().getAbsolutePath()+ File.separator;}/** * 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long availableBlocks = (long) stat.getAvailableBlocks() – 4;// 获取单个数据块的大小（byte）long freeBlocks = stat.getAvailableBlocks();return freeBlocks * availableBlocks;}return 0;}/** * 获取指定路径所在空间的剩余可用容量字节数，，单位byte * * @param filePath * @return 容量字节 SDCard可用空间，内部存储可用空间 */public static long getFreeBytes(String filePath){// 如果是sd卡的下的路径，则获取sd卡可用容量if (filePath.startsWith(getSDCardPath())){filePath = getSDCardPath();} else{// 如果是内部存储的路径，则获取内存存储的可用容量filePath = Environment.getDataDirectory().getAbsolutePath();}StatFs stat = new StatFs(filePath);long availableBlocks = (long) stat.getAvailableBlocks() – 4;return stat.getBlockSize() * availableBlocks;}/** * 获取系统存储路径 * * @return */public static String getRootDirectoryPath(){return Environment.getRootDirectory().getAbsolutePath();}}
上天完全是为了坚强你的意志，才在道路上设下重重的障碍。
