我有一项使用以下代码的服务：
package com.ritvik.weaselyclock;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.IntentService;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.app.NotificationCompat;
import android.support.v4.app.TaskStackBuilder;
import android.util.Log;
import android.widget.Toast;
import com.google.android.gms.gcm.GoogleCloudMessaging;
import com.ritvik.utils.JSONUtils;
public class GcmIntentService extends IntentService {
public final static String CLOCK_ANG = "com.tutecentral.navigationdrawer.CLOCKANG";
public static final int NOTIFICATION_ID = 1;
NotificationCompat.Builder builder;
Handler mHandler;
static final String TAG = "Receive Message Activity";
public GcmIntentService() {
super("44937255078");
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
mHandler = new Handler();
return startId;
}
@Override
protected void onHandleIntent(Intent intent) {
Bundle extras = intent.getExtras();
GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(this);
// The getMessageType() intent parameter must be the intent you received
// in your BroadcastReceiver.
String messageType = gcm.getMessageType(intent);
if (!extras.isEmpty()) { // has effect of unparcelling Bundle
/*
* Filter messages based on message type. Since it is likely that GCM
* will be extended in the future with new message types, just ignore
* any message types you're not interested in, or that you don't
* recognize.
*/
if (GoogleCloudMessaging.
MESSAGE_TYPE_SEND_ERROR.equals(messageType)) {
} else if (GoogleCloudMessaging.
MESSAGE_TYPE_DELETED.equals(messageType)) {
// If it's a regular GCM message, do some work.
} else if (GoogleCloudMessaging.
MESSAGE_TYPE_MESSAGE.equals(messageType)) {
// Post notification of received message.
Log.i(TAG, "Received: " + extras.toString());
handleMessage(extras.getString("message"));
}
}
}
public void handleMessage(final String msg) {
mHandler.post(new Runnable() {
@Override
public void run() {
JSONObject JSON = null;
String type = "";
try {
JSON = new JSONObject(msg);
type = JSON.getString("type");
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (type.equals("ru_101")) {
startActivity(new Intent(GcmIntentService.this, MainActivity.class));
Toast.makeText(GcmIntentService.this, "Registration successful", Toast.LENGTH_LONG).show();
}
else if (type.equals("ru_002")) {
Toast.makeText(GcmIntentService.this, "Registration successfully updated", Toast.LENGTH_LONG).show();
}
else if (type.equals("ru_301")) {
NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(GcmIntentService.this)
.setSmallIcon(R.drawable.ic_launcher)
.setContentTitle("My notification")
.setContentText("Hello World!");
// Creates an explicit intent for an Activity in your app
Intent resultIntent = new Intent(GcmIntentService.this, ResultActivity.class);
try {
resultIntent.putExtra("com.ritvik.weaselyclock.phone", JSON.getString("phone_number"));
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// The stack builder object will contain an artificial back stack for the
// started Activity.
// This ensures that navigating backward from the Activity leads out of
// your application to the Home screen.
TaskStackBuilder stackBuilder = TaskStackBuilder.create(GcmIntentService.this);
// Adds the back stack for the Intent (but not the Intent itself)
stackBuilder.addParentStack(ResultActivity.class);
// Adds the Intent that starts the Activity to the top of the stack
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent =
stackBuilder.getPendingIntent(
0,
PendingIntent.FLAG_UPDATE_CURRENT
);
mBuilder.addAction(R.drawable.ic_action_good, "Accept", resultPendingIntent);
mBuilder.addAction(R.drawable.ic_action_discard, "Reject", resultPendingIntent);
NotificationManager mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
int mId = 001;
// mId allows you to update the notification later on.
mNotificationManager.notify(mId, mBuilder.build());
}
else if ( type.equals("ru_101") || type.equals("ru_102")
|| type.equals("ru_103") || type.equals("ru_201")
|| type.equals("ru_202") || type.equals("ru_203")
|| type.equals("ru_204") || type.equals("ru_205")
|| type.equals("ru_206") || type.equals("ru_207")
|| type.equals("ru_208") || type.equals("ru_209")
|| type.equals("ru_210") || type.equals("ru_211")
|| type.equals("jr_201") || type.equals("jr_202")
|| type.equals("jr_203") || type.equals("jr_204")
|| type.equals("jr_205") || type.equals("jr_206")
|| type.equals("jr_207") || type.equals("jr_208")
|| type.equals("jr_209") || type.equals("id_201")
|| type.equals("id_202") || type.equals("id_203")
|| type.equals("id_204") || type.equals("id_205")
|| type.equals("id_206") || type.equals("id_207")
|| type.equals("id_208") || type.equals("sm_201")
|| type.equals("sm_202") || type.equals("sm_203")
|| type.equals("sm_204") || type.equals("sm_205")
|| type.equals("sm_206") || type.equals("sm_207")
|| type.equals("sm_208") || type.equals("sm_209")
|| type.equals("sm_210")) {
try {
Log.e("Server error:", JSON.getString("error"));
Toast.makeText(GcmIntentService.this, "Server error: " + JSON.getString("error"), Toast.LENGTH_LONG).show();
} catch (JSONException e) {
e.printStackTrace();
}
}
else if (type.equals("jr_101") || type.equals("jr_102")) {
try {
Toast.makeText(GcmIntentService.this, JSON.getString("action"), Toast.LENGTH_LONG).show();
} catch (JSONException e) {
e.printStackTrace();
}
}
else if (type.equals("jr_301") || type.equals("jr_302")) {
try {
Toast.makeText(GcmIntentService.this, "You have been " + JSON.getString("action") + "by group" + JSON.getString("group") , Toast.LENGTH_LONG).show();
} catch (JSONException e) {
e.printStackTrace();
}
}
else if (type.equals("id_101")) {
try {
JSONArray members = JSON.getJSONArray("members");
JSONUtils.writeJSON("com.ritvik.weaselyclock.MEMBERS", GcmIntentService.this, members, "members");
} catch (JSONException e) {
e.printStackTrace();
}
}
}
});
}
}
出于某种原因，根据调试器，永远不会调用onStartCommand（）方法。我尝试使用onCreate（），但也没有被调用。然后，应用程序崩溃并显示以下LogCat输出：
04-28 08:25:35.699: E/AndroidRuntime(11113): FATAL EXCEPTION: Thread-775
04-28 08:25:35.699: E/AndroidRuntime(11113): java.lang.NullPointerException
04-28 08:25:35.699: E/AndroidRuntime(11113): at com.ritvik.weaselyclock.GcmIntentService.handleMessage(GcmIntentService.java:69)
04-28 08:25:35.699: E/AndroidRuntime(11113): at com.ritvik.utils.HTTPUtils$1.run(HTTPUtils.java:48)
04-28 08:25:35.699: E/AndroidRuntime(11113): at java.lang.Thread.run(Thread.java:838)
编辑：问题不是因为没有正确初始化处理程序而没有调用这些方法。
任何帮助表示赞赏。感谢。