Java Code Examples for android.os.StatFs#getFreeBlocks()

/**
 * 除去系统后的内存大小
 */
private void checkExceptSystemCapacity() {
    StatFs statFs = new StatFs(Environment.getExternalStorageDirectory().getPath());

    //存储块
    long blockCount = statFs.getBlockCount();
    //块大小
    long blockSize = statFs.getBlockSize();
    //可用块数量
    long availableCount = statFs.getAvailableBlocks();
    //剩余块数量，注：这个包含保留块（including reserved blocks）即应用无法使用的空间
    long freeBlocks = statFs.getFreeBlocks();

    long totalSize = statFs.getTotalBytes();
    long availableSize = statFs.getAvailableBytes();

    append("total = " + getUnit(totalSize));
    append("availableSize = " + getUnit(availableSize));
    append("=========");
    append("total = " + getUnit(blockSize * blockCount));
    append("available = " + getUnit(blockSize * availableCount));
    append("free = " + getUnit(blockSize * freeBlocks));
}
 

public static void queryWithStatFs() {
        StatFs statFs = new StatFs(Environment.getExternalStorageDirectory().getPath());

        //存储块
        long blockCount = statFs.getBlockCount();
        //块大小
        long blockSize = statFs.getBlockSize();
        //可用块数量
        long availableCount = statFs.getAvailableBlocks();
        //剩余块数量，注：这个包含保留块（including reserved blocks）即应用无法使用的空间
        long freeBlocks = statFs.getFreeBlocks();

        //level 18
//        long totalSize = statFs.getTotalBytes();
//        long availableSize = statFs.getAvailableBytes();

        Log.d(TAG, "=========");
        Log.d(TAG, "total = " + getUnit(blockSize * blockCount, 1024));
        Log.d(TAG, "available = " + getUnit(blockSize * availableCount, 1024));
        Log.d(TAG, "free = " + getUnit(blockSize * freeBlocks, 1024));
    }
 

/**
 * Gets the information about the free storage space, including reserved blocks, either internal
 * or external depends on the given input
 *
 * @param storageType Internal or external storage type
 * @return available space in bytes, -1 if no information is available
 */
@SuppressLint("DeprecatedMethod")
public long getFreeStorageSpace(StorageType storageType) {
  ensureInitialized();

  maybeUpdateStats();

  StatFs statFS = storageType == StorageType.INTERNAL ? mInternalStatFs : mExternalStatFs;
  if (statFS != null) {
    long blockSize, availableBlocks;
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
      blockSize = statFS.getBlockSizeLong();
      availableBlocks = statFS.getFreeBlocksLong();
    } else {
      blockSize = statFS.getBlockSize();
      availableBlocks = statFS.getFreeBlocks();
    }
    return blockSize * availableBlocks;
  }
  return -1;
}
 

public static long readSDCard(Context context, Boolean isRemovable, Boolean freeOrTotal) {
    DecimalFormat df = new DecimalFormat("0.00");
    getStoragePath(context, isRemovable);
    StatFs sf = new StatFs(getStoragePath(context, isRemovable));
    long blockSize;
    long blockCount;
    long availCount;
    if (Build.VERSION.SDK_INT > 18) {
        blockSize = sf.getBlockSizeLong(); //文件存储时每一个存储块的大小为4KB
        blockCount = sf.getBlockCountLong();//存储区域的存储块的总个数
        availCount = sf.getFreeBlocksLong();//存储区域中可用的存储块的个数（剩余的存储大小）
    } else {
        blockSize = sf.getBlockSize();
        blockCount = sf.getBlockCount();
        availCount = sf.getFreeBlocks();
    }
    //Log.d("sss", "总的存储空间大小:" + blockSize * blockCount / 1073741824 + "GB" + ",剩余空间:"
    //    + availCount * blockSize / 1073741824 + "GB"
    //    + "--存储块的总个数--" + blockCount + "--一个存储块的大小--" + blockSize / 1024 + "KB");
    //return df.format((freeOrTotal ? availCount : blockCount) * blockSize / 1073741824.0);
    return (freeOrTotal ? availCount : blockCount) * blockSize;
    //return "-1";
}
 

public static Long getFreeSpaceSize(StatFs statFs) {
    long freeSpaceSize = 0;
    try {
        if (VERSION.SDK_INT >= 18) {
            freeSpaceSize = statFs.getFreeBlocksLong() * statFs.getBlockSizeLong();
        } else {
            freeSpaceSize = ((long) statFs.getFreeBlocks()) * ((long) statFs.getBlockSize());
        }
    } catch (Throwable e) {
        LOG.w(TAG, "getScreenHeightWidth failed(Throwable): " + e.getMessage());
    }
    return Long.valueOf(freeSpaceSize);
}
 

/**
 * @return
 */
public static long getFreeBlocks() {
    long size = 0;
    if (Environment.getExternalStorageDirectory() != null) {
        StatFs stat = new StatFs(Environment.getExternalStorageDirectory().getPath());
        size = VERSION >= 18 ? SDK18.getFreeBlocks() : (long) stat.getFreeBlocks();
    }
    return size;
}