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POArrayIndexOutOfBoundsException After Scanning NFC Tag
 

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  1. POArrayIndexOutOfBoundsException After Scanning NFC Tag
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    <p>I'm attempting to rebuild my NFC Tag Reader </p> <p><a href="https://stackoverflow.com/questions/16071121/converting-existing-nfc-script-to-read-multiple-ndef-records">https://stackoverflow.com/questions/16071121/converting-existing-nfc-script-to-read-multiple-ndef-records</a></p> <p>and I'm getting the following error: </p> <pre><code> java.lang.ArrayIndexOutOfBoundsException: length=1; index=1 </code></pre> <p>on the line: </p> <pre><code> NdefMessage msg2 = (NdefMessage) rawMsgs[1]; </code></pre> <p>I understand the issue is usually related to trying to access an array item that doesn't exist however I'm really not sure how to resolve the issue in the following implementation.</p> <p>P.S.</p> <p>The issue only occurs when scanning a new NFC tag. I noticed something VERY interesting though... </p> <p>If I comment out the following two lines the app does not crash AND scans the tag successfully! </p> <pre><code>// NdefMessage msg2 = (NdefMessage) rawMsgs[1]; // beamMsg2.setText(new String(msg.getRecords()[1].getPayload())); </code></pre> <p>SOURCE:</p> <pre><code>public class Nfc extends Activity implements CreateNdefMessageCallback, OnNdefPushCompleteCallback { NfcAdapter mNfcAdapter; TextView beamMsg; TextView beamMsg2; private static final int MESSAGE_SENT = 1; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.nfc); beamMsg = (TextView) findViewById(R.id.msg); beamMsg2 = (TextView) findViewById(R.id.msg_ID); beamMsg.setText("Peter Smith"); beamMsg2.setText("123456"); // Check for available NFC Adapter mNfcAdapter = NfcAdapter.getDefaultAdapter(this); if (mNfcAdapter == null) { beamMsg = (TextView) findViewById(R.id.msg); beamMsg2= (TextView) findViewById(R.id.msg_ID); beamMsg.setText("NFC is not available on this device."); beamMsg2.setText("NFC is not available on this device."); } else { // Register callback to set NDEF message mNfcAdapter.setNdefPushMessageCallback(this, this); // Register callback to listen for message-sent success mNfcAdapter.setOnNdefPushCompleteCallback(this, this); } } public void submitClicked(View v) { Toast toast = Toast.makeText(getApplicationContext(), R.string.info, Toast.LENGTH_LONG); toast.show(); } /** * Implementation for the CreateNdefMessageCallback interface */ @Override public NdefMessage createNdefMessage(NfcEvent event) { NdefMessage msg = new NdefMessage(NdefRecord.createMime( beamMsg.getText() .toString(), null)); return msg; } public NdefMessage createNdefMessage_two(NfcEvent event) { NdefMessage msg2 = new NdefMessage(NdefRecord.createMime( beamMsg2.getText() .toString(), null)); return msg2; } /** * Implementation for the OnNdefPushCompleteCallback interface */ @Override public void onNdefPushComplete(NfcEvent arg0) { // A handler is needed to send messages to the activity when this // callback occurs, because it happens from a binder thread mHandler.obtainMessage(MESSAGE_SENT).sendToTarget(); } /** This handler receives a message from onNdefPushComplete */ private final Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { switch (msg.what) { case MESSAGE_SENT: Toast.makeText(getApplicationContext(), "Message sent!", Toast.LENGTH_LONG).show(); break; } } }; @Override public void onResume() { super.onResume(); // Check to see that the Activity started due to an Android Beam if (NfcAdapter.ACTION_NDEF_DISCOVERED.equals(getIntent().getAction())) { processIntent(getIntent()); } } @Override public void onNewIntent(Intent intent) { // onResume gets called after this to handle the intent setIntent(intent); } /** * Parses the NDEF Message from the intent and prints to the TextView */ void processIntent(Intent intent) { Parcelable[] rawMsgs = intent.getParcelableArrayExtra( NfcAdapter.EXTRA_NDEF_MESSAGES); // only one message sent during the beam NdefMessage msg = (NdefMessage) rawMsgs[0]; NdefMessage msg2 = (NdefMessage) rawMsgs[1]; // record 0 contains the MIME type, record 1 is the AAR, if present beamMsg.setText(new String(msg.getRecords()[0].getPayload())); beamMsg2.setText(new String(msg.getRecords()[1].getPayload())); } @Override public boolean onCreateOptionsMenu(Menu menu) { // If NFC is not available, we won't be needing this menu if (mNfcAdapter == null) { return super.onCreateOptionsMenu(menu); } MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.main, menu); return true; } // @Override // public boolean onOptionsItemSelected(MenuItem item) { // switch (item.getItemId()) { // case R.id.menu_settings: // Intent intent = new Intent(Settings.ACTION_NFCSHARING_SETTINGS); // startActivity(intent); // return true; // default: // return super.onOptionsItemSelected(item); // } } //}//} </code></pre> <p>EDIT AFTER ANSWER:</p> <pre><code>public class Connect extends Activity implements CreateNdefMessageCallback, OnNdefPushCompleteCallback { NfcAdapter mNfcAdapter; TextView beamMsg; TextView beamMsg2; private static final int MESSAGE_SENT = 1; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.connect); beamMsg = (TextView) findViewById(R.id.msg); beamMsg2 = (TextView) findViewById(R.id.msg_ID); beamMsg.setText("Peter Smith"); beamMsg2.setText("123456"); // Check for available NFC Adapter mNfcAdapter = NfcAdapter.getDefaultAdapter(this); if (mNfcAdapter == null) { beamMsg = (TextView) findViewById(R.id.msg); beamMsg2= (TextView) findViewById(R.id.msg_ID); beamMsg.setText("NFC is not available on this device."); beamMsg2.setText("NFC is not available on this device."); } else { // Register callback to set NDEF message mNfcAdapter.setNdefPushMessageCallback(this, this); // Register callback to listen for message-sent success mNfcAdapter.setOnNdefPushCompleteCallback(this, this); } } public void submitClicked(View v) { Toast toast = Toast.makeText(getApplicationContext(), R.string.info, Toast.LENGTH_LONG); toast.show(); } /** * Implementation for the CreateNdefMessageCallback interface */ @Override public NdefMessage createNdefMessage(NfcEvent event) { NdefMessage msg = new NdefMessage(NdefRecord.createMime( beamMsg.getText() .toString(), null)); return msg; } public NdefMessage createNdefMessage_two(NfcEvent event) { NdefMessage msg2 = new NdefMessage(NdefRecord.createMime( beamMsg2.getText() .toString(), null)); return msg2; } /** * Implementation for the OnNdefPushCompleteCallback interface */ @Override public void onNdefPushComplete(NfcEvent arg0) { // A handler is needed to send messages to the activity when this // callback occurs, because it happens from a binder thread mHandler.obtainMessage(MESSAGE_SENT).sendToTarget(); } /** This handler receives a message from onNdefPushComplete */ private final Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { switch (msg.what) { case MESSAGE_SENT: Toast.makeText(getApplicationContext(), "Message sent!", Toast.LENGTH_LONG).show(); break; } } }; @Override public void onResume() { super.onResume(); // Check to see that the Activity started due to an Android Beam if (NfcAdapter.ACTION_NDEF_DISCOVERED.equals(getIntent().getAction())) { processIntent(getIntent()); } } @Override public void onNewIntent(Intent intent) { // onResume gets called after this to handle the intent setIntent(intent); } /** * Parses the NDEF Message from the intent and prints to the TextView */ void processIntent(Intent intent) { Parcelable[] rawMsgs = intent.getParcelableArrayExtra( NfcAdapter.EXTRA_NDEF_MESSAGES); // only one message sent during the beam NdefMessage[] msg = new NdefMessage[rawMsgs.length]; for (int i = 0; i &lt; msg.length; i++) { msg[i] = (NdefMessage) rawMsgs[i]; // record 0 contains the MIME type, record 1 is the AAR, if present beamMsg[i].setText(new String(msg[i].getRecords()[1].getPayload())); beamMsg2[i].setText(new String(msg[i].getRecords()[1].getPayload())); }} @Override public boolean onCreateOptionsMenu(Menu menu) { // If NFC is not available, we won't be needing this menu if (mNfcAdapter == null) { return super.onCreateOptionsMenu(menu); } MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.main, menu); return true; } // @Override // public boolean onOptionsItemSelected(MenuItem item) { // switch (item.getItemId()) { // case R.id.menu_settings: // Intent intent = new Intent(Settings.ACTION_NFCSHARING_SETTINGS); // startActivity(intent); // return true; // default: // return super.onOptionsItemSelected(item); // } } //}//} </code></pre>
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