如何创建推送通知？代码中的问题。没有得到注册ID
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【中文标题】如何创建推送通知？代码中的问题。没有得到注册ID【英文标题】：How can i create Push notification? Problems in Code. not getting registration id 【发布时间】：2015-09-03 12:37:57 【问题描述】：我是 android 新手，我的代码需要一些帮助。我正在做推送通知，我使用发布请求将注册 ID 传递给我的服务器。我编写了代码来执行此操作，但是在调试时我不断收到 null 的注册 ID。这是我写的代码：
Splashscreen.java
package com.driverapp.inis.zuber;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.location.Location;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.util.Log;
import android.view.View;
import android.widget.RelativeLayout;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.gcm.GoogleCloudMessaging;
import java.io.IOException;
import Connectivity_manager.Internet_CheckingActivity;
import UI_Alert.AlertDialogManager;
public class Splashscreen extends Activity
private static final String TAG = "SplashScreenActivity";
private static final String TAG1 = "lifecycle";
private Location newLocation = null;
private AlertDialogManager alert;
private Internet_CheckingActivity chckInternt;
private GeoLocationFinder geoLocationFinder;
private final static int PLAY_SERVICES_RESOLUTION_REQUEST = 9000;
public static final String EXTRA_MESSAGE = "message";
public static final String PROPERTY_REG_ID = "registration_id";
private static final String PROPERTY_APP_VERSION = "appVersion";
protected String SENDER_ID = "525761298572";
private GoogleCloudMessaging gcm = null;
private String regid = null;
private Context context = null;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splashscreen);
alert = new AlertDialogManager();
chckInternt = new Internet_CheckingActivity(this);
Log.d(TAG1, "oncreate");
context = getApplication();
if (checkPlayServices())
gcm = GoogleCloudMessaging.getInstance(this);
regid = getRegistrationId(context);
if (regid.isEmpty())
registerInBackground();
else
Log.d(TAG, "No valid Google Play Services APK found.");
@Override
public void onBackPressed()
restart();
@Override
protected void onResume()
super.onResume();
Log.d(TAG1, "onresume");
// setupLocation();
if (chckInternt.isNetworkAvailable() == true)
setupLocation();
else
alert.showAlertDialog(Splashscreen.this, "Error", "Please Check Your Internet Connection", false);
checkPlayServices();
/**
* Method for checking the current lat log values.
*/
private void setupLocation()
GeoLocationFinder.LocationResult locationResult = new GeoLocationFinder.LocationResult()
@Override
public void gotLocation(Location location)
if (location != null)
newLocation = new Location(location);
newLocation.set(location);
Log.d(TAG,
"Got coordinates, congratulations. Longitude = "
+ newLocation.getLongitude() + " Latitude = "
+ newLocation.getLatitude());
Intent i = new Intent(Splashscreen.this, DefaultMAP.class);
startActivity(i);
finish();
else
new Handler(Looper.getMainLooper()).post(new Runnable()
@Override
public void run()
alert.showAlertDialog(Splashscreen.this, "Check Your GPS", "Restart your Application", false);
);
;
geoLocationFinder = new GeoLocationFinder();
geoLocationFinder.getLocation(this, locationResult);
RelativeLayout root = (RelativeLayout) findViewById(R.id.splash);
root.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
restart();
);
public void restart()
Intent rIntent = getBaseContext().getPackageManager()
.getLaunchIntentForPackage(getBaseContext().getPackageName());
rIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(rIntent);
@Override
protected void onPause()
super.onPause();
Log.d(TAG1, "onpause");
@Override
protected void onStart()
super.onStart();
Log.d(TAG1, "onstart");
private boolean checkPlayServices()
int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
if (resultCode != ConnectionResult.SUCCESS)
if (GooglePlayServicesUtil.isUserRecoverableError(resultCode))
GooglePlayServicesUtil.getErrorDialog(resultCode, this,
PLAY_SERVICES_RESOLUTION_REQUEST).show();
else
Log.d(TAG, "This device is not supported - Google Play Services.");
finish();
return false;
return true;
private String getRegistrationId(Context context)
final SharedPreferences prefs = getGCMPreferences(context);
String registrationId = prefs.getString(PROPERTY_REG_ID, "");
if (registrationId.isEmpty())
Log.d(TAG, "Registration ID not found.");
return "";
int registeredVersion = prefs.getInt(PROPERTY_APP_VERSION, Integer.MIN_VALUE);
int currentVersion = getAppVersion(context);
if (registeredVersion != currentVersion)
Log.d(TAG, "App version changed.");
return "";
return registrationId;
private SharedPreferences getGCMPreferences(Context context)
return getSharedPreferences(Splashscreen.class.getSimpleName(),
Context.MODE_PRIVATE);
private static int getAppVersion(Context context)
try
PackageInfo packageInfo = context.getPackageManager()
.getPackageInfo(context.getPackageName(), 0);
return packageInfo.versionCode;
catch (PackageManager.NameNotFoundException e)
throw new RuntimeException("Could not get package name: " + e);
private void registerInBackground()
new AsyncTask()
@Override
protected Object doInBackground(Object... params)
String msg = "";
try
if (gcm == null)
gcm = GoogleCloudMessaging.getInstance(context);
regid = gcm.register(SENDER_ID);
Log.d(TAG, "########################################");
Log.d(TAG, "Current Device's Registration ID is: " + msg);
catch (IOException ex)
msg = "Error :" + ex.getMessage();
return null;
protected void onPostExecute(Object result) //to do here
;
.execute(null,null,null);
登录活动
public class LoginActivity extends AppCompatActivity
private Button btnlogin;
private EditText txtusername;
private EditText txtpassword;
private String userName;
private String message;
private String userid;
private JSONArray login_data = null;
private Internet_CheckingActivity chckInternt;
private TransparentProgressDialog pDialog;
private static final String URL_Login = "http:myapi";
private static final String TAG_MESSAGE = "message";
private static final String TAG_username = "username";
private static final String TAG_password = "password";
SessionManager msessionManager;
private AlertDialogManager alert;
private Location newLocation = null;
private static final String TAG = "SplashScreenActivity";
private GeoLocationFinder geoLocationFinder;
private static final String TAG_regid = "gcm_regid";
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
alert = new AlertDialogManager();
chckInternt = new Internet_CheckingActivity(this);
txtusername = (EditText) findViewById(R.id.lusername);
txtpassword = (EditText) findViewById(R.id.lpassword);
btnlogin = (Button) findViewById(R.id.loginbtn);
msessionManager = new SessionManager(getApplicationContext());
btnlogin.setOnClickListener(mbtnLogin);
if (SERVER_URL == null || SENDER_ID == null || SERVER_URL.length() == 0
|| SENDER_ID.length() == 0)
// GCM sernder id / server url is missing
alert.showAlertDialog(LoginActivity.this, "Configuration Error!",
"Please set your Server URL and GCM Sender ID", false);
// stop executing code by return
return;
@Override
public void onBackPressed()
startActivity(new Intent(this, Splashscreen.class));
private View.OnClickListener mbtnLogin = new View.OnClickListener()
@Override
public void onClick(View v)
if (chckInternt.isNetworkAvailable() == true)
if (txtusername.getText().toString().isEmpty() || txtpassword.getText().toString().isEmpty())
alert.showAlertDialog(LoginActivity.this, "Login failed", "Both Username and Password required", false);
txtusername.setText("");
txtpassword.setText("");
else
setupLocation();
else
alert.showAlertDialog(LoginActivity.this, "Login failed", "Please check your internet Connection and Retry Again", false);
txtusername.setText("");
txtpassword.setText("");
;
private void setupLocation()
GeoLocationFinder.LocationResult locationResult = new GeoLocationFinder.LocationResult()
@Override
public void gotLocation(Location location)
if (location != null)
newLocation = new Location(location);
newLocation.set(location);
Log.d(TAG,
"Got coordinates, congratulations. Longitude = "
+ newLocation.getLongitude() + " Latitude = "
+ newLocation.getLatitude());
new Handler(Looper.getMainLooper()).post(new Runnable()
@Override
public void run()
new AttemptLogin().execute();
);
else
new Handler(Looper.getMainLooper()).post(new Runnable()
@Override
public void run()
alert.showAlertDialog(LoginActivity.this, "Check Your GPS", "Restart your Application", false);
);
;
geoLocationFinder = new GeoLocationFinder();
geoLocationFinder.getLocation(this, locationResult);
@Override
protected void onPause()
super.onPause();
txtusername.setText("");
txtpassword.setText("");
class AttemptLogin extends AsyncTask<Void, Void, Void>
@Override
protected void onPreExecute()
super.onPreExecute();
pDialog = new TransparentProgressDialog(LoginActivity.this,R.drawable.spinner);
pDialog.setCancelable(Boolean.FALSE);
pDialog.show();
@Override
protected Void doInBackground(Void... params)
HashMap<String, String> regId = msessionManager.getUserregidDetails();
String registrationId = regId.get(SessionManager.KEY_Regid);
Httpmanager hm = new Httpmanager();
final String username = txtusername.getText().toString();
String password = txtpassword.getText().toString();
List params1 = new ArrayList();
params1.add(new BasicNameValuePair(TAG_username, username));
params1.add(new BasicNameValuePair(TAG_password, password));
params1.add(new BasicNameValuePair(TAG_regid, registrationId));
String jsonstr = hm.makeServiceCall(URL_Login, Httpmanager.post, params1);
Log.d("Response: ", "> " + jsonstr);
if (jsonstr != null)
try
JSONObject jsonObject = new JSONObject(jsonstr);
if (jsonObject.getString("hasError").equals("1"))
message = jsonObject.getString(TAG_MESSAGE);
runOnUiThread(new Runnable()
public void run()
alert.showAlertDialog(LoginActivity.this, "Alert", message, false);
);
else
message = jsonObject.getString(TAG_MESSAGE);
login_data = jsonObject.getJSONArray("data");
for (int i = 0; i < login_data.length(); i++)
JSONObject l = login_data.getJSONObject(i);
userName = l.getString("username");
userid = l.getString("userid");
msessionManager.createLoginSession(userName, userid);
Intent intent = new Intent(LoginActivity.this, DefaultMAP.class);
runOnUiThread(new Runnable()
public void run()
Toast.makeText(getApplicationContext(), message + userName, Toast.LENGTH_LONG).show();
);
startActivity(intent);
finish();
catch (JSONException e)
e.printStackTrace();
else
Log.e("HttpManager", "Couldn't get any data from the url");
runOnUiThread(new Runnable()
public void run()
Toast.makeText(getApplicationContext(),"Please check your internet Connection and Retry Again", Toast.LENGTH_LONG).show();
);
return null;
@Override
protected void onPostExecute(Void file_url)
pDialog.dismiss();
txtusername.setText("");
txtpassword.setText("");
Commonutilities.java
public class CommonUtilities
// give your server registration url here
static final String SERVER_URL = "http:myapp";
// Google project id
static final String SENDER_ID = "525761298572";
/**
* Tag used on log messages.
*/
static final String TAG = "GCM";
static final String DISPLAY_MESSAGE_ACTION =
"com.driverapp.inis.zuber.DISPLAY_MESSAGE";
static final String EXTRA_MESSAGE = "message";
/**
* Notifies UI to display a message.
* <p>
* This method is defined in the common helper because it's used both by
* the UI and the background service.
*
* @param context application's context.
* @param message message to be displayed.
*/
static void displayMessage(Context context, String message)
Intent intent = new Intent(DISPLAY_MESSAGE_ACTION);
intent.putExtra(EXTRA_MESSAGE, message);
context.sendBroadcast(intent);
Serverutility.java
public final class ServerUtilities
private static final int MAX_ATTEMPTS = 5;
private static final int BACKOFF_MILLI_SECONDS = 2000;
private static final Random random = new Random();
/**
* Register this account/device pair within the server.
*
*/
static void register(final Context context, String email, final String regId)
Log.i(TAG, "registering device (regId = " + regId + ")");
String serverUrl = CommonUtilities.SERVER_URL;
Map<String, String> params = new HashMap<String, String>();
params.put("regId", regId);
params.put("email", email);
long backoff = BACKOFF_MILLI_SECONDS + random.nextInt(1000);
// Once GCM returns a registration id, we need to register on our server
// As the server might be down, we will retry it a couple
// times.
for (int i = 1; i <= MAX_ATTEMPTS; i++)
Log.d(TAG, "Attempt #" + i + " to register");
try
CommonUtilities.displayMessage(context, context.getString(
R.string.server_registering, i, MAX_ATTEMPTS));
post(serverUrl, params);
GCMRegistrar.setRegisteredOnServer(context, true);
String message = context.getString(R.string.server_registered);
CommonUtilities.displayMessage(context, message);
return;
catch (IOException e)
// Here we are simplifying and retrying on any error; in a real
// application, it should retry only on unrecoverable errors
// (like HTTP error code 503).
Log.e(TAG, "Failed to register on attempt " + i + ":" + e);
if (i == MAX_ATTEMPTS)
break;
try
Log.d(TAG, "Sleeping for " + backoff + " ms before retry");
Thread.sleep(backoff);
catch (InterruptedException e1)
// Activity finished before we complete - exit.
Log.d(TAG, "Thread interrupted: abort remaining retries!");
Thread.currentThread().interrupt();
return;
// increase backoff exponentially
backoff *= 2;
String message = context.getString(R.string.server_register_error,
MAX_ATTEMPTS);
CommonUtilities.displayMessage(context, message);
/**
* Unregister this account/device pair within the server.
*/
static void unregister(final Context context, final String regId)
Log.i(TAG, "unregistering device (regId = " + regId + ")");
String serverUrl = SERVER_URL + "/unregister";
Map<String, String> params = new HashMap<String, String>();
params.put("regId", regId);
try
post(serverUrl, params);
GCMRegistrar.setRegisteredOnServer(context, false);
String message = context.getString(R.string.server_unregistered);
CommonUtilities.displayMessage(context, message);
catch (IOException e)
// At this point the device is unregistered from GCM, but still
// registered in the server.
// We could try to unregister again, but it is not necessary:
// if the server tries to send a message to the device, it will get
// a "NotRegistered" error message and should unregister the device.
String message = context.getString(R.string.server_unregister_error,
e.getMessage());
CommonUtilities.displayMessage(context, message);
/**
* Issue a POST request to the server.
*
* @param endpoint POST address.
* @param params request parameters.
*
* @throws IOException propagated from POST.
*/
private static void post(String endpoint, Map<String, String> params)
throws IOException
URL url;
try
url = new URL(endpoint);
catch (MalformedURLException e)
throw new IllegalArgumentException("invalid url: " + endpoint);
StringBuilder bodyBuilder = new StringBuilder();
Iterator<Entry<String, String>> iterator = params.entrySet().iterator();
// constructs the POST body using the parameters
while (iterator.hasNext())
Entry<String, String> param = iterator.next();
bodyBuilder.append(param.getKey()).append('=')
.append(param.getValue());
if (iterator.hasNext())
bodyBuilder.append('&');
String body = bodyBuilder.toString();
Log.v(TAG, "Posting '" + body + "' to " + url);
byte[] bytes = body.getBytes();
HttpURLConnection conn = null;
try
Log.e("URL", "> " + url);
conn = (HttpURLConnection) url.openConnection();
conn.setDoOutput(true);
conn.setUseCaches(false);
conn.setFixedLengthStreamingMode(bytes.length);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded;charset=UTF-8");
// post the request
OutputStream out = conn.getOutputStream();
out.write(bytes);
out.close();
// handle the response
int status = conn.getResponseCode();
if (status != 200)
throw new IOException("Post failed with error code " + status);
finally
if (conn != null)
conn.disconnect();
【问题讨论】：
【参考方案1】：Larry 试过了，但找不到错误。将 google play 服务添加到您的项目并尝试 getDeviceToken() 方法。
private void getDeviceToken()
GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(context
.getApplicationContext());
String deviceToken = null;
try
deviceToken = gcm.register(Constants.Project_ID);
catch (IOException e)
e.printStackTrace();
Log.i("GCM", "Device token : " + deviceToken);
if (deviceToken == null)
System.out.println("null");
getDeviceToken();
else
System.out.println("device"+deviceToken);
// save registeration ID here
欲了解更多信息，请尝试这些链接Android hivepush-notifications-in-android-platform
【讨论】：
params1.add(new BasicNameValuePair(TAG_regid, registrationId));我在调试时得到它为空 对不起老兄，我的意思是我没有找到你在哪里获得注册ID。 我的 json 帖子 username="" password="" gcm_regid="" 已更新代码，但我的注册 ID 在我登录时显示为空以上是关于如何创建推送通知？代码中的问题。没有得到注册ID的主要内容，如果未能解决你的问题，请参考以下文章
使用 pushsharp 获取 android 的注册 ID 以进行推送通知