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Implemented isWritable() to indicate NDEF capability container r/w state.

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Change-Id: Ie8bdf490c955e620f5e5029346fbe2e188ea4748
This commit is contained in:
Martijn Coenen
2010-12-08 23:23:47 -08:00
committed by Jeff Hamilton
parent ae56a85162
commit 3300e4c3ea
1 changed files with 21 additions and 31 deletions
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52
core/java/android/nfc/technology/Ndef.java
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@ -38,11 +38,12 @@ import java.io.IOException;
* permission.
*/
public final class Ndef extends BasicTagTechnology {
public static final int NDEF_MODE_READ_ONCE = 1;
public static final int NDEF_MODE_READ_ONLY = 2;
public static final int NDEF_MODE_WRITE_ONCE = 3;
public static final int NDEF_MODE_WRITE_MANY = 4;
public static final int NDEF_MODE_UNKNOWN = 5;
/** @hide */
public static final int NDEF_MODE_READ_ONLY = 1;
/** @hide */
public static final int NDEF_MODE_READ_WRITE = 2;
/** @hide */
public static final int NDEF_MODE_UNKNOWN = 3;
/** @hide */
public static final String EXTRA_NDEF_MSG = "ndefmsg";
@ -50,7 +51,11 @@ public final class Ndef extends BasicTagTechnology {
/** @hide */
public static final String EXTRA_NDEF_MAXLENGTH = "ndefmaxlength";
private final int maxNdefSize;
/** @hide */
public static final String EXTRA_NDEF_CARDSTATE = "ndefcardstate";
private final int mMaxNdefSize;
private final int mCardState;
/**
* Internal constructor, to be used by NfcAdapter
@ -59,10 +64,12 @@ public final class Ndef extends BasicTagTechnology {
public Ndef(NfcAdapter adapter, Tag tag, int tech, Bundle extras) throws RemoteException {
super(adapter, tag, tech);
if (extras != null) {
maxNdefSize = extras.getInt(EXTRA_NDEF_MAXLENGTH);
mMaxNdefSize = extras.getInt(EXTRA_NDEF_MAXLENGTH);
mCardState = extras.getInt(EXTRA_NDEF_CARDSTATE);
} else {
maxNdefSize = 0; //TODO: throw exception
throw new NullPointerException("NDEF tech extras are null.");
}
}
/**
@ -104,35 +111,18 @@ public final class Ndef extends BasicTagTechnology {
/**
* Get maximum NDEF message size in bytes
*/
public int getSize() {
return maxNdefSize;
public int getMaxSize() {
return mMaxNdefSize;
}
/**
* Read/Write mode hint.
* Provides a hint if further reads or writes are likely to succeed.
* Provides a hint on whether writes are likely to succeed.
* <p>Requires {@link android.Manifest.permission#NFC} permission.
* @return one of NDEF_MODE
* @return true if write is likely to succeed
* @throws IOException if the target is lost or connection closed
*/
public int getModeHint() throws IOException {
try {
int result = mTagService.getModeHint(mTag.getServiceHandle());
if (ErrorCodes.isError(result)) {
switch (result) {
case ErrorCodes.ERROR_IO:
throw new IOException();
default:
// Should not happen
throw new IOException();
}
}
return result;
} catch (RemoteException e) {
attemptDeadServiceRecovery(e);
return NDEF_MODE_UNKNOWN;
}
public boolean isWritable() {
return (mCardState == NDEF_MODE_READ_WRITE);
}
// Methods that require connect()