出现了完全相同的问题.我通过转到手机上的设置->应用程序-> 您的应用程序名称->强制关机->卸载来解决它.

然后在Android Studio中，我去了->文件->使缓存无效/重新启动->等待gradle再次生成，然后在手机上运行该应用程序.像魅力一样工作.

It's simple, when you use parse for the first time on your mobile it works like a charm. When you reinstall your application, it screws everything.

As stated on *** by Eran:

"PushService.subscribe seems to cache the subscription in local storage, to avoid re-subscribing when you launch the app multiple times. This is what the first parameter of that method is used for : context - This is used to access local storage to cache the subscription, so it must currently be a viable context. (quote from here).

However, when you uninstall the app, local storage for that app is wiped from your device, so the new installation will cause PushService.subscribe to re-register to Google Cloud Messaging. If the new registration returns a new registration ID, Parse would have two registration IDs that can be used to send push notifications to your app, and both of them would be linked to the same userName you supplied to subscribe. Therefore sending a notification to that userName will send it to both registration IDs, causing it to arrive twice.

When Parse send the notifications for you, they should get from Google a response with canonical_registration_id, which will let them know one of the registration IDs associated with your app on your device is old, and should not be used anymore. Therefore (assuming Parse have a decent implementation of GCM) the next time you send a notification to your device, you should receive it only once."

Here is my source code for the installation:

String  androidId = Secure.getString(getApplicationContext().getContentResolver(),Secure.ANDROID_ID);
Parse.initialize(this, "KEY1", "KEY2");
PushService.setDefaultPushCallback(this, ParseActivity.class);

ParseInstallation installation = ParseInstallation.getCurrentInstallation();
installation.put("UniqueId",androidId);

installation.setObjectId(null);

installation.saveInBackground();

My stacktrace (like everyones):

05-20 19:47:35.630: E/ParseCommandCache(6497): com.parse.ParseException: at least one ID field (installationId,deviceToken) must be specified in this operation
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.ParseCommand.onPostExecute(ParseCommand.java:334)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.ParseRequest$5.then(ParseRequest.java:321)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.ParseRequest$5.then(ParseRequest.java:318)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$11.run(Task.java:481)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$ImmediateExecutor.execute(Task.java:673)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.completeAfterTask(Task.java:477)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.continueWithTask(Task.java:353)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.continueWithTask(Task.java:364)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$9.then(Task.java:410)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$9.then(Task.java:402)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$11.run(Task.java:481)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$ImmediateExecutor.execute(Task.java:673)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.completeAfterTask(Task.java:477)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.access$400(Task.java:22)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$7.then(Task.java:346)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$7.then(Task.java:343)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.runContinuations(Task.java:510)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.access$800(Task.java:22)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$TaskCompletionSource.trySetResult(Task.java:565)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$TaskCompletionSource.setResult(Task.java:599)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$11$1.then(Task.java:493)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$11$1.then(Task.java:485)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$10.run(Task.java:448)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$ImmediateExecutor.execute(Task.java:673)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.completeImmediately(Task.java:444)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.access$300(Task.java:22)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$6.then(Task.java:311)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$6.then(Task.java:308)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.runContinuations(Task.java:510)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.access$800(Task.java:22)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$TaskCompletionSource.trySetResult(Task.java:565)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$TaskCompletionSource.setResult(Task.java:599)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$11$1.then(Task.java:493)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$11$1.then(Task.java:485)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$10.run(Task.java:448)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$ImmediateExecutor.execute(Task.java:673)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.completeImmediately(Task.java:444)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.access$300(Task.java:22)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$6.then(Task.java:311)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$6.then(Task.java:308)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.runContinuations(Task.java:510)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.access$800(Task.java:22)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$TaskCompletionSource.trySetResult(Task.java:565)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$TaskCompletionSource.setResult(Task.java:599)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$11$1.then(Task.java:493)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$11$1.then(Task.java:485)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$10.run(Task.java:448)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$ImmediateExecutor.execute(Task.java:673)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.completeImmediately(Task.java:444)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.continueWith(Task.java:318)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.continueWith(Task.java:329)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$11.run(Task.java:485)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$ImmediateExecutor.execute(Task.java:673)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.completeAfterTask(Task.java:477)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.access$400(Task.java:22)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$7.then(Task.java:346)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$7.then(Task.java:343)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.runContinuations(Task.java:510)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.access$800(Task.java:22)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$TaskCompletionSource.trySetResult(Task.java:565)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$TaskCompletionSource.setResult(Task.java:599)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$11$1.then(Task.java:493)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$11$1.then(Task.java:485)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$10.run(Task.java:448)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$ImmediateExecutor.execute(Task.java:673)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.completeImmediately(Task.java:444)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.continueWith(Task.java:318)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task.continueWith(Task.java:329)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at com.parse.Task$11.run(Task.java:485)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
05-20 19:47:35.630: E/ParseCommandCache(6497):  at java.lang.Thread.run(Thread.java:841)
05-20 19:48:32.615: D/Request(6497): Warning: Sessionless Request needs token but missing either application ID or client token.

Since I've not found any real solution, I'm asking here.

Thanks.

Had the exact same problem. I solved it by going to settings on my phone -> Apps -> your application name -> Force shutdown -> Uninstall.

Then in Android studio I went -> File -> Invalidate Caches / Restart -> Wait for the gradle to build again and then run the Application on my phone. Worked like a charm.