android NFC P2P问题

[黑暗骑士IV]

找到了个 SnepPusher的代码，但只能把数据push到PC，PC回传给手机的没数据么？是什么问题呢？

package it.ismb.nfc.sneppusher;

import java.nio.charset.Charset;

import android.net.Uri;
import android.nfc.NdefMessage;
import android.nfc.NdefRecord;
import android.nfc.NfcAdapter;
import android.nfc.NfcAdapter.CreateBeamUrisCallback;
import android.nfc.NfcAdapter.CreateNdefMessageCallback;
import android.nfc.NfcAdapter.OnNdefPushCompleteCallback;
import android.nfc.NfcEvent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.Parcelable;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.widget.TextView;
import android.widget.Toast;
import android.text.format.Time;

public class SnepPusher extends Activity
implements CreateNdefMessageCallback,
OnNdefPushCompleteCallback,
CreateBeamUrisCallback


{

NfcAdapter mNfcAdapter;
TextView mInfoText;

private final Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case 1:
Toast.makeText(getApplicationContext(), "Message sent!", Toast.LENGTH_LONG).show();
break;
}
}
};


@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_snep_pusher);

// Check for available NFC Adapter
mNfcAdapter = NfcAdapter.getDefaultAdapter(this);
if (mNfcAdapter == null) {
mInfoText = (TextView) findViewById(R.id.textView3);
mInfoText.setText("NFC is not available on this device.");
}

// Register callback to set NDEF message
mNfcAdapter.setNdefPushMessageCallback(this, this);
// Register callback to listen for message-sent success
mNfcAdapter.setOnNdefPushCompleteCallback(this, this);
mNfcAdapter.setBeamPushUrisCallback(this, this);
}

@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 boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_snep_pusher, menu);
return true;
}

@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(1).sendToTarget();
}
// 55 AA 05 12 FF 02 01 00 FF
// 55 AA 05 12 FF 02 00 00 FF
// 55 AA 22 12 FF 05 61 6D 20 6D 65 20 75 70 21 0A 0A 42 65 61 6D 20 54 69 6D 65 3A 20 31 30 3A 33 32 3A 31 32 00 FF
// 55 AA 05 12 FF 02 01 00 FF

@Override
public NdefMessage createNdefMessage(NfcEvent event) {
Time time = new Time();
time.setToNow();
String text = ("Beam me up!\n\n" + "Beam Time: " + time.format("%H:%M:%S"));
NdefMessage msg = new NdefMessage(
new NdefRecord[] { createMimeRecord(
"application/it.ismb.nfc.sneppusher", text.getBytes())});
return msg;
}

public NdefRecord createMimeRecord(String mimeType, byte[] payload) {
byte[] mimeBytes = mimeType.getBytes(Charset.forName("US-ASCII"));
NdefRecord mimeRecord = new NdefRecord(NdefRecord.TNF_MIME_MEDIA, mimeBytes, new byte[0], payload);
return mimeRecord;
}

void processIntent(Intent intent) {
Parcelable[] rawMsgs = intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);
// only one message sent
NdefMessage msg = (NdefMessage) rawMsgs[0];
// record 0 contains the MIME type, record 1 is the AAR, if present
mInfoText.setText(new String(msg.getRecords()[0].getPayload()));
}
@Override
public Uri[] createBeamUris(NfcEvent arg0) {
// TODO Auto-generated method stub
return null;
}


}
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="it.ismb.nfc.sneppusher"
android:versionCode="1"
android:versionName="1.0" >

<uses-permission android:name="android.permission.NFC" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

<uses-feature android:name="android.hardware.nfc" android:required="true" />
<!--
<meta-data android:name="android.nfc.disable_beam_default" android:value="true"/>
--> <uses-sdk
android:minSdkVersion="16"
android:targetSdkVersion="18" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >

<activity
android:name=".SnepPusher"
android:label="@string/title_activity_snep_pusher" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>

<intent-filter>
<action android:name="android.nfc.action.NDEF_DISCOVERED"/>
<category android:name="android.intent.category.DEFAULT"/>
<data android:mimeType="application/it.ismb.nfc.sneppusher"/>
</intent-filter>
</activity>
</application>

</manifest>

[十三邵]

引用 楼主 liaogang22 的回复:

找到了个 SnepPusher的代码，但只能把数据push到PC，PC回传给手机的没数据么？是什么问题呢？ package it.ismb.nfc.sneppusher; import java.nio.charset.Charset; import android.net.Uri; import android.nfc.NdefMessage; import android.nfc.NdefRecord; import android.nfc.NfcAdapter; import android.nfc.NfcAdapter.CreateBeamUrisCallback; import android.nfc.NfcAdapter.CreateNdefMessageCallback; import android.nfc.NfcAdapter.OnNdefPushCompleteCallback; import android.nfc.NfcEvent; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.os.Parcelable; import android.app.Activity; import android.content.Intent; import android.view.Menu; import android.widget.TextView; import android.widget.Toast; import android.text.format.Time; public class SnepPusher extends Activity implements CreateNdefMessageCallback, OnNdefPushCompleteCallback, CreateBeamUrisCallback { NfcAdapter mNfcAdapter; TextView mInfoText; private final Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { switch (msg.what) { case 1: Toast.makeText(getApplicationContext(), "Message sent!", Toast.LENGTH_LONG).show(); break; } } }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_snep_pusher); // Check for available NFC Adapter mNfcAdapter = NfcAdapter.getDefaultAdapter(this); if (mNfcAdapter == null) { mInfoText = (TextView) findViewById(R.id.textView3); mInfoText.setText("NFC is not available on this device."); } // Register callback to set NDEF message mNfcAdapter.setNdefPushMessageCallback(this, this); // Register callback to listen for message-sent success mNfcAdapter.setOnNdefPushCompleteCallback(this, this); mNfcAdapter.setBeamPushUrisCallback(this, this); } @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 boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.activity_snep_pusher, menu); return true; } @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(1).sendToTarget(); } // 55 AA 05 12 FF 02 01 00 FF // 55 AA 05 12 FF 02 00 00 FF // 55 AA 22 12 FF 05 61 6D 20 6D 65 20 75 70 21 0A 0A 42 65 61 6D 20 54 69 6D 65 3A 20 31 30 3A 33 32 3A 31 32 00 FF // 55 AA 05 12 FF 02 01 00 FF @Override public NdefMessage createNdefMessage(NfcEvent event) { Time time = new Time(); time.setToNow(); String text = ("Beam me up!\n\n" + "Beam Time: " + time.format("%H:%M:%S")); NdefMessage msg = new NdefMessage( new NdefRecord[] { createMimeRecord( "application/it.ismb.nfc.sneppusher", text.getBytes())}); return msg; } public NdefRecord createMimeRecord(String mimeType, byte[] payload) { byte[] mimeBytes = mimeType.getBytes(Charset.forName("US-ASCII")); NdefRecord mimeRecord = new NdefRecord(NdefRecord.TNF_MIME_MEDIA, mimeBytes, new byte[0], payload); return mimeRecord; } void processIntent(Intent intent) { Parcelable[] rawMsgs = intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES); // only one message sent NdefMessage msg = (NdefMessage) rawMsgs[0]; // record 0 contains the MIME type, record 1 is the AAR, if present mInfoText.setText(new String(msg.getRecords()[0].getPayload())); } @Override public Uri[] createBeamUris(NfcEvent arg0) { // TODO Auto-generated method stub return null; } } <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="it.ismb.nfc.sneppusher" android:versionCode="1" android:versionName="1.0" > <uses-permission android:name="android.permission.NFC" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-feature android:name="android.hardware.nfc" android:required="true" /> <!-- <meta-data android:name="android.nfc.disable_beam_default" android:value="true"/> --> <uses-sdk android:minSdkVersion="16" android:targetSdkVersion="18" /> <application android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name=".SnepPusher" android:label="@string/title_activity_snep_pusher" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> <intent-filter> <action android:name="android.nfc.action.NDEF_DISCOVERED"/> <category android:name="android.intent.category.DEFAULT"/> <data android:mimeType="application/it.ismb.nfc.sneppusher"/> </intent-filter> </activity> </application> </manifest>

我也不知道，帮你顶一下吧。。。

[liaogang21]

<data android:mimeType="application/it.ismb.nfc.sneppusher"/> 的问题