Debugging using Firebase in Android

Evans Attafuah

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Aug 11, 2015, 10:39:58 AM8/11/15

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Hello,

I use firebase for faster debugging in my Android App. Can anyone assist me on how to convert POJOS to firebase readable format.

I get serialisation errors when I try to do this. Either the object is too big or unreadable.

Any help will deeply be appreciated.

Frank van Puffelen

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Aug 11, 2015, 4:40:40 PM8/11/15

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Hi Evans,

We recently expanded the sections on reading and writing docs to cover the POJO serialization better. I usually find it pretty easy to write up a POJO for a simple JSON structure, but of course there are lots of situations that are more difficult than the ones I typically encounter.

If you have a specific sample of a problem, it will be easier to say something concrete if you share the JSON and your attempted Java class.

Frank

Evans Attafuah

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Aug 11, 2015, 5:52:13 PM8/11/15

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Hello Frank,

TL;DR

as already stated what I do is use firebase for testing specific functionality or expected return types. Am using Android Studio with multiple emulators and devices attached so sometimes I don't get my logs until I disconnect some of my devices. Am also very new to android dev.

Anyway I ended up using firebase for debugging my app. this is how my tests looks like. I have also attached the class to this email

List<String> contacts = new ArrayList<>();
contacts.add("james");
contacts.add("evans");
contacts.add("frank");
contacts.add("firebase");
new Testable.Spec("load contacts")

.describe(“does contact object have any value?")

        .expect(contacts)
        .run();

Testable.java

Evans Attafuah

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Aug 11, 2015, 6:00:12 PM8/11/15

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I want to be able to pass POJOS directly to firebase set value for debugging purposes.

Currently when I do this the app crashes.

set value only works with hash maps

My output to firebase has also been attached here.

Screen Shot 2015-08-11 at 9.57.31 PM.png

Frank van Puffelen

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Aug 11, 2015, 7:52:28 PM8/11/15

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Hey Evans,

I'm not sure I understand your problem. When I put your class into a Java project, it executes fine. You can find the output here: https://testable.firebaseio-demo.com/, but I'm quite sure that matches with what you're seeing.

If you have problems serializing a specific Java class, can you share that Java class? It would also be helpful if you can share the error message you get (including a stack trace). Without those, it will be difficult to provide assistance.

Frank

GmailMe

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Aug 12, 2015, 12:13:18 AM8/12/15

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Hello Frank,

The example I gave works fine. I was assuming you will try it with some complex Java object?

Let me try to recreate the issue, I will pull crash reporting and send it back to this thread when I get near my Mac.

Sent from my iPhone 6

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Evans Attafuah

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Aug 12, 2015, 6:00:50 AM8/12/15

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Hello Frank,

I have attached a screen shot of the crash and also the code that caused it. I have used the LayoutInflater params from the onCreateView in android fragments.

new Testable.Spec("views")
.describe("the layout inflater view object")
.expect(inflater)
.run();

Screen Shot 2015-08-12 at 9.55.39 AM.png

Evans Attafuah

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Aug 12, 2015, 6:10:02 AM8/12/15

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Also this from Crashlytics

Frank van Puffelen

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Aug 12, 2015, 1:59:23 PM8/12/15

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Can you dig up the entire stacktrace for that error?

Evans Attafuah

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Aug 12, 2015, 3:16:11 PM8/12/15

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com.firebase.client.FirebaseException: Failed to parse to snapshot

at com.firebase.client.Firebase.setValueInternal(Firebase.java:357)

at com.firebase.client.Firebase.setValue(Firebase.java:248)

at com.psyphertxt.android.cyfa.util.Testable$Spec.run(Testable.java:169)

at com.psyphertxt.android.cyfa.ui.fragment.ContextUserFragment.onCreateView(ContextUserFragment.java:51)

at android.support.v4.app.Fragment.performCreateView(Fragment.java:1789)

at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:955)

at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1138)

at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:740)

at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1501)

at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:490)

at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:141)

at android.support.v4.view.ViewPager.populate(ViewPager.java:1105)

at android.support.v4.view.ViewPager.populate(ViewPager.java:951)

at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1473)

at android.view.View.measure(View.java:17478)

at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:719)

at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:455)

at android.view.View.measure(View.java:17478)

at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5363)

at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)

at android.support.v7.internal.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:124)

at android.view.View.measure(View.java:17478)

at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5363)

at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1410)

at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)

at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)

at android.view.View.measure(View.java:17478)

at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5363)

at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)

at android.view.View.measure(View.java:17478)

at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5363)

at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1410)

at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)

at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)

at android.view.View.measure(View.java:17478)

at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5363)

at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)

at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2548)

at android.view.View.measure(View.java:17478)

at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2266)

at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1395)

at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1594)

at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1253)

at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6596)

at android.view.Choreographer$CallbackRecord.run(Choreographer.java:803)

at android.view.Choreographer.doCallbacks(Choreographer.java:603)

at android.view.Choreographer.doFrame(Choreographer.java:573)

at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:789)

at android.os.Handler.handleCallback(Handler.java:733)

at android.os.Handler.dispatchMessage(Handler.java:95)

at android.os.Looper.loop(Looper.java:136)

at android.app.ActivityThread.main(ActivityThread.java:5476)

at java.lang.reflect.Method.invokeNative(Method.java)

at java.lang.reflect.Method.invoke(Method.java:515)

at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)

at dalvik.system.NativeStart.main(NativeStart.java)

Caused by: java.lang.IllegalArgumentException: Conflicting getter definitions for property "changingConfigurations": android.app.Activity#isChangingConfigurations(0 params) vs android.app.Activity#getChangingConfigurations(0 params) (through reference chain: java.util.HashMap["expect"]->com.android.internal.policy.impl.PhoneLayoutInflater["context"])

at com.fasterxml.jackson.databind.ObjectMapper._convert(ObjectMapper.java:2615)

at com.fasterxml.jackson.databind.ObjectMapper.convertValue(ObjectMapper.java:2542)

at com.firebase.client.Firebase.setValueInternal(Firebase.java:346)

at com.firebase.client.Firebase.setValue(Firebase.java:248)

at com.psyphertxt.android.cyfa.util.Testable$Spec.run(Testable.java:169)