IT. Expert System.

Android Reference

NdefFormatable

android.nfc.tech

Class NdefFormatable

java.lang.Object
- android.nfc.tech.NdefFormatable

All Implemented Interfaces:

TagTechnology, Closeable, AutoCloseable
```
public final class NdefFormatable
extends Object
```
Provide access to NDEF format operations on a Tag.
Acquire a NdefFormatable object using get(android.nfc.Tag).
Android devices with NFC must only enumerate and implement this class for tags for which it can format to NDEF.
Unfortunately the procedures to convert unformated tags to NDEF formatted tags are not specified by NFC Forum, and are not generally well-known. So there is no mandatory set of tags for which all Android devices with NFC must support NdefFormatable.
Note: Methods that perform I/O operations require the android.Manifest.permission#NFC permission.

Field Summary
- Fields inherited from interface android.nfc.tech.TagTechnology
  ISO_DEP, MIFARE_CLASSIC, MIFARE_ULTRALIGHT, NDEF, NDEF_FORMATABLE, NFC_A, NFC_B, NFC_BARCODE, NFC_F, NFC_V

Constructor Summary

Constructors
Constructor and Description

NdefFormatable(Tag tag)
Internal constructor, to be used by NfcAdapter

Constructors
Constructor and Description
`NdefFormatable(Tag tag)` Internal constructor, to be used by NfcAdapter

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`close()` Disable I/O operations to the tag from this `TagTechnology` object, and release resources.
`void`	`connect()` Enable I/O operations to the tag from this `TagTechnology` object.
`void`	`format(NdefMessage firstMessage)` Format a tag as NDEF, and write a `NdefMessage`.
`void`	`formatReadOnly(NdefMessage firstMessage)` Formats a tag as NDEF, write a `NdefMessage`, and make read-only.
`static NdefFormatable`	`get(Tag tag)` Get an instance of `NdefFormatable` for the given tag.
`Tag`	`getTag()` Get the `Tag` object backing this `TagTechnology` object.
`boolean`	`isConnected()` Helper to indicate if I/O operations should be possible.
`void`	`reconnect()` Re-connect to the `Tag` associated with this connection.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - NdefFormatable
```
public NdefFormatable(Tag tag)
               throws RemoteException
```
    Internal constructor, to be used by NfcAdapter
    
    Throws:
    
    RemoteException
- Method Detail
  - get
```
public static NdefFormatable get(Tag tag)
```
    Get an instance of NdefFormatable for the given tag.
    Does not cause any RF activity and does not block.
    Returns null if NdefFormatable was not enumerated in Tag.getTechList(). This indicates the tag is not NDEF formatable by this Android device.
    
    Parameters:
    tag - an NDEF formatable tag
    
    Returns:
    NDEF formatable object
  - format
```
public void format(NdefMessage firstMessage)
            throws IOException,
                   FormatException
```
    Format a tag as NDEF, and write a NdefMessage.
    This is a multi-step process, an IOException is thrown if any one step fails.
    The card is left in a read-write state after this operation.
    This is an I/O operation and will block until complete. It must not be called from the main application thread. A blocked call will be canceled with IOException if close() is called from another thread.
    Requires the android.Manifest.permission#NFC permission.
    
    Parameters:
    firstMessage - the NDEF message to write after formatting, can be null
    
    Throws:
    
    TagLostException - if the tag leaves the field
    
    IOException - if there is an I/O failure, or the operation is canceled
    
    FormatException - if the NDEF Message to write is malformed
  - formatReadOnly
```
public void formatReadOnly(NdefMessage firstMessage)
                    throws IOException,
                           FormatException
```
    Formats a tag as NDEF, write a NdefMessage, and make read-only.
    This is a multi-step process, an IOException is thrown if any one step fails.
    The card is left in a read-only state if this method returns successfully.
    This is an I/O operation and will block until complete. It must not be called from the main application thread. A blocked call will be canceled with IOException if close() is called from another thread.
    Requires the android.Manifest.permission#NFC permission.
    
    Parameters:
    firstMessage - the NDEF message to write after formatting
    
    Throws:
    
    TagLostException - if the tag leaves the field
    
    IOException - if there is an I/O failure, or the operation is canceled
    
    FormatException - if the NDEF Message to write is malformed
  - getTag
```
public Tag getTag()
```
    Description copied from interface: TagTechnology
    
    Get the Tag object backing this TagTechnology object.
    
    Specified by:
    
    getTag in interface TagTechnology
    
    Returns:
    the Tag backing this TagTechnology object.
  - isConnected
```
public boolean isConnected()
```
    Description copied from interface: TagTechnology
    
    Helper to indicate if I/O operations should be possible.
    Returns true if TagTechnology.connect() has completed, and TagTechnology.close() has not been called, and the Tag is not known to be out of range.
    Does not cause RF activity, and does not block.
    
    Specified by:
    
    isConnected in interface TagTechnology
    
    Returns:
    true if I/O operations should be possible
  - connect
```
public void connect()
             throws IOException
```
    Description copied from interface: TagTechnology
    
    Enable I/O operations to the tag from this TagTechnology object.
    May cause RF activity and may block. Must not be called from the main application thread. A blocked call will be canceled with IOException by calling TagTechnology.close() from another thread.
    Only one TagTechnology object can be connected to a Tag at a time.
    Applications must call TagTechnology.close() when I/O operations are complete.
    Requires the android.Manifest.permission#NFC permission.
    
    Specified by:
    
    connect in interface TagTechnology
    
    Throws:
    
    IOException - if there is an I/O failure, or connect is canceled
    See Also:
    TagTechnology.close()
  - reconnect
```
public void reconnect()
               throws IOException
```
    Description copied from interface: TagTechnology
    
    Re-connect to the Tag associated with this connection. Reconnecting to a tag can be used to reset the state of the tag itself.
    May cause RF activity and may block. Must not be called from the main application thread. A blocked call will be canceled with IOException by calling TagTechnology.close() from another thread.
    Requires the android.Manifest.permission#NFC permission.
    
    Specified by:
    
    reconnect in interface TagTechnology
    
    Throws:
    
    IOException - if there is an I/O failure, or connect is canceled
    See Also:
    TagTechnology.connect(), TagTechnology.close()
  - close
```
public void close()
           throws IOException
```
    Description copied from interface: TagTechnology
    
    Disable I/O operations to the tag from this TagTechnology object, and release resources.
    Also causes all blocked I/O operations on other thread to be canceled and return with IOException.
    Requires the android.Manifest.permission#NFC permission.
    
    Specified by:
    
    close in interface TagTechnology
    
    Specified by:
    
    close in interface Closeable
    
    Specified by:
    
    close in interface AutoCloseable
    
    Throws:
    
    IOException
    See Also:
    TagTechnology.connect()

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IT. Expert System.

Android Reference

NdefFormatable

Class NdefFormatable

Field Summary

Fields inherited from interface android.nfc.tech.TagTechnology

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

NdefFormatable

Method Detail

get

format

formatReadOnly

getTag

isConnected

connect

reconnect

close

Android Reference

Java basics

Java Enterprise Edition (EE)

Java Standard Edition (SE)

SQL

HTML

PHP

CSS

Java Script

MYSQL

JQUERY

VBS

REGEX

C

C++

C#

Design patterns

RFC (standard status)

RFC (proposed standard status)

RFC (draft standard status)

RFC (informational status)

RFC (experimental status)

RFC (best current practice status)

RFC (historic status)

RFC (unknown status)

IT dictionary