C2DM注册ID null

Question

我按照这个教程http://www.vogella.com/articles/AndroidCloudToDeviceMessaging/article.html 我写了清单文件给予所有足够的权限。 但我发现了注册ID null..Please帮助 这是我写的代码：

public class C2DMClientActivity extends Activity { 
/** Called when the activity is first created. */ 
final static String AUTH="authentication"; 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
} 
public void register(View view){//Register Button onclick event 
    Log.w("C2DM","startRegistrationProcess"); 
    Intent intent=new Intent("com.google.android.c2dm.intent.REGISTER"); 
    intent.putExtra("app",PendingIntent.getBroadcast(this, 0, new Intent(), 0)); 
    intent.putExtra("sender","shubhamjindal18@gmail.com"); 
    startService(intent); 
} 
public void showRegistrationId(View view){//Show button onclick event 
    SharedPreferences prefs=PreferenceManager.getDefaultSharedPreferences(this); 
    String string=prefs.getString(AUTH,"n/a"); 
    Toast.makeText(this,string,Toast.LENGTH_LONG).show(); 
    Log.d("C2DM RegId",string); 
} 
} 
public class C2DMRegistrationReceiver extends BroadcastReceiver{ 
@Override 
public void onReceive(Context context,Intent intent){ 
    String string=intent.getAction(); 
    Log.w("C2DM","Registration Receiver Called"); 
    if ("com.google.android.c2dm.intent.REGISTRATION".equals(string)){ 
     Log.w("C2DM", "Received registration ID"); 
     final String str=intent.getStringExtra("registation_id"); 
     final String error=intent.getStringExtra("error"); 
     Log.d("C2DM", "dmControl: registrationId = " + str 
       + ", error = " + error); 
     String deviceId = Secure.getString(context.getContentResolver(), 
       Secure.ANDROID_ID); 
     createNotification(context, str); 
     sendRegistrationIdToServer(deviceId,str); 

     saveRegistrationId(context,str); 
    } 
} 
public void saveRegistrationId(Context context,String str){ 
    SharedPreferences prefs=PreferenceManager.getDefaultSharedPreferences(context); 
    Editor edit=prefs.edit(); 
    edit.putString(C2DMClientActivity.AUTH,str); 
    edit.commit(); 
} 
public void createNotification(Context context,String str){ 
    NotificationManager notim=(NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE); 
    Notification noti=new Notification(R.drawable.ic_launcher,"Registation Successful",System.currentTimeMillis()); 
    noti.flags|=Notification.FLAG_AUTO_CANCEL; 
    Intent intent=new Intent(context,RegistrationResultActivity.class); 
    intent.putExtra("registration_id", str); 
    PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, 
      intent, 0); 
    noti.setLatestEventInfo(context, "Registration", 
      "Successfully registered", pendingIntent); 
    notim.notify(0, noti); 
} 
public void sendRegistrationIdToServer(String deviceId, 
     String registrationId) { 
    Log.d("C2DM", "Sending registration ID to my application server"); 
    HttpClient client = new DefaultHttpClient(); 
    HttpPost post = new HttpPost(""); 
    try { 
     List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(1); 
     // Get the deviceID 
     nameValuePairs.add(new BasicNameValuePair("deviceid", deviceId)); 
     nameValuePairs.add(new BasicNameValuePair("registrationid", 
       registrationId)); 

     post.setEntity(new UrlEncodedFormEntity(nameValuePairs)); 
     HttpResponse response = client.execute(post); 
     BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent())); 

     String line = ""; 
     while ((line = rd.readLine()) != null) { 
      Log.e("HttpResponse", line); 
     } 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 
} 

} 

public class RegistrationResultActivity extends Activity { 
@Override 
    public void onCreate(Bundle savedInstanceState) { 

     setContentView(R.layout.activity); 
     Bundle extras=getIntent().getExtras(); 
     if (extras!=null){ 
      String str=extras.getString("registration_id"); 
      TextView tv=(TextView) findViewById(R.id.textView1); 
      tv.setText(str); 
     } 
     super.onCreate(savedInstanceState); 
    } 
} 
public class C2DMMessageReceiver extends BroadcastReceiver{ 
@Override 
public void onReceive(Context context,Intent intent){ 
    String action=intent.getAction(); 
    Log.w("C2DM","Message Receiver called"); 
    if ("com.google.android.c2dm.intent.RECEIVE".equals(action)){ 
     Log.w("C2DM", "Received message"); 
     final String payload = intent.getStringExtra("payload"); 
     Log.d("C2DM", "dmControl: payload = " + payload); 
     createNoti(context,payload); 
    } 
} 
public void createNoti(Context context,String str){ 
    NotificationManager notim=(NotificationManager) context.getSystemService(context.NOTIFICATION_SERVICE); 
    Notification noti=new Notification(R.drawable.ic_launcher,"Message received",System.currentTimeMillis()); 
    noti.flags|=Notification.FLAG_AUTO_CANCEL; 
    Intent intent=new Intent(context,MessageResultActivity.class); 
    intent.putExtra("payload",str); 
    PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, 
      intent, 0); 
    noti.setLatestEventInfo(context, "Message", 
      "New message received", pendingIntent); 
    notim.notify(0, noti); 
} 
} 
public class MessageResultActivity extends Activity{ 

@Override 
    public void onCreate(Bundle savedInstanceState) { 

     setContentView(R.layout.activity); 
     Bundle extras=getIntent().getExtras(); 
     if (extras!=null){ 
      String payload=extras.getString("payload"); 
      TextView tv=(TextView) findViewById(R.id.textView1); 
      tv.setText(payload); 
     } 
     super.onCreate(savedInstanceState); 
    } 
} 

Answer 1

它应该是registration_id但registation_id

final String str=intent.getStringExtra("registation_id"); 

应该

final String str=intent.getStringExtra("registration_id "); 

https://developers.google.com/android/c2dm/#push