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Android Reference

BackupDataInputStream


android.app.backup

Class BackupDataInputStream

    • Method Summary

      Methods
      Modifier and Type Method and Description
      String getKey()
      Report the key string associated with this entity within the backup data set.
      int read()
      Read one byte of entity data from the stream, returning it as an integer value.
      int read(byte[] b)
      Read enough entity data into a byte array to fill the array.
      int read(byte[] b, int offset, int size)
      Read up to size bytes of data into a byte array, beginning at position offset within the array.
      int size()
      Report the total number of bytes of data available for the current entity.
    • Method Detail

      • read

        public int read()
                 throws IOException
        Read one byte of entity data from the stream, returning it as an integer value. If more than size() bytes of data are read from the stream, the output of this method is undefined.
        Specified by:
        read in class InputStream
        Returns:
        The byte read, or undefined if the end of the stream has been reached.
        Throws:
        IOException - if the stream is closed or another IOException occurs.
      • read

        public int read(byte[] b,
               int offset,
               int size)
                 throws IOException
        Read up to size bytes of data into a byte array, beginning at position offset within the array.
        Overrides:
        read in class InputStream
        Parameters:
        b - Byte array into which the data will be read
        offset - The data will be stored in b beginning at this index within the array.
        size - The number of bytes to read in this operation. If insufficient data exists within the entity to fulfill this request, only as much data will be read as is available.
        Returns:
        The number of bytes of data read, or zero if all of the entity's data has already been read.
        Throws:
        IOException - if the stream is closed or another IOException occurs.
      • read

        public int read(byte[] b)
                 throws IOException
        Read enough entity data into a byte array to fill the array.
        Overrides:
        read in class InputStream
        Parameters:
        b - Byte array to fill with data from the stream. If the stream does not have sufficient data to fill the array, then the contents of the remainder of the array will be undefined.
        Returns:
        The number of bytes of data read, or zero if all of the entity's data has already been read.
        Throws:
        IOException
      • getKey

        public String getKey()
        Report the key string associated with this entity within the backup data set.
        Returns:
        The key string for this entity, equivalent to calling BackupDataInput.getKey() on the underlying BackupDataInput.
      • size

        public int size()
        Report the total number of bytes of data available for the current entity.
        Returns:
        The number of data bytes available, equivalent to calling BackupDataInput.getDataSize() on the underlying BackupDataInput.


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