Develop Reference

IncompatibleClassChangeError when called "realm.copyToRealmOrUpdate({RealmModel})"

when i call "realm.copyToRealmOrUpdate({RealmObject})", app crashes on lower API(21-25). No problem in version API-25 and above. Logcat output :
java.lang.IncompatibleClassChangeError: The method 'java.lang.Class java.lang.Object.getClass()' was expected to be of type interface but instead was found to be of type virtual (declaration of 'java.lang.reflect.ArtMethod' appears in /system/framework/core-libart.jar)
at io.realm.DefaultRealmModuleMediator.copyOrUpdate(DefaultRealmModuleMediator.java:131)
at io.realm.Realm.copyOrUpdate(Realm.java:1815)
at io.realm.Realm.copyToRealmOrUpdate(Realm.java:1199)
at com.viyatek.ultimatefacts.Activites.MainActivity.DataFetched$lambda-10(MainActivity.kt:826)
at com.viyatek.ultimatefacts.Activites.MainActivity.$r8$lambda$fX_wkxDWKFkFuw4LXNz0m5YzJyo(MainActivity.kt)
at com.viyatek.ultimatefacts.Activites.MainActivity$$ExternalSyntheticLambda4.execute(D8$$SyntheticClass)
at io.realm.Realm.executeTransaction(Realm.java:1604)
at com.viyatek.ultimatefacts.Activites.MainActivity.DataFetched(MainActivity.kt:823)
at com.viyatek.ultimatefacts.NetworkOperations.getData.ExecuteNetWorkCall$lambda-0(getData.kt:111)
at com.viyatek.ultimatefacts.NetworkOperations.getData.$r8$lambda$Va8-rJSbrmVyGMKSedsNwZR74V8(getData.kt)
at com.viyatek.ultimatefacts.NetworkOperations.getData$$ExternalSyntheticLambda1.onResponse(D8$$SyntheticClass)
at com.android.volley.toolbox.JsonRequest.deliverResponse(JsonRequest.java:100)
at com.android.volley.ExecutorDelivery$ResponseDeliveryRunnable.run(ExecutorDelivery.java:102)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
i use in top-level gradle;
classpath "io.realm:realm-gradle-plugin:10.10.1"
I have no idea for the solution. I added try-catch block for now. I suspect ProGuard. but, for now i couldn't find the solution

I am recently getting crash in FrameLayout.java line 525 android.widget.FrameLayout.layoutChildren

Please check the stack trace anyone has an idea?
It seems the crash is from different android OS versions so may me it id, not OS related issue.
Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getVisibility()' on a null object reference
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:525)
at android.widget.FrameLayout.onLayout(FrameLayout.java:508)
at android.view.View.layout(View.java:15604)
at android.view.ViewGroup.layout(ViewGroup.java:4967)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2105)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1855)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1079)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5839)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:835)
at android.view.Choreographer.doCallbacks(Choreographer.java:634)
at android.view.Choreographer.doFrame(Choreographer.java:600)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:821)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5318)
at java.lang.reflect.Method.invoke(Method.java)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:922)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:717)

app crashes when changing the font style of the device

I am facing a issue in Samsung mobile, the issue is this, i open the application that i have made and minimized the app now the app is running at the background, now i go to my mobile
settings-->Display--> font style,
Then i changed the font when i come back and open the app that was running at the back ground the app crashes
I do not know where the issue is can you please give some idea on how to move about
This was the error that i was able to see in my logcat
2-12 17:58:54.883 1473-1473/com.mysmcc E/AndroidRuntime: FATAL EXCEPTION: main Process: com.mysmcc, PID: 1473 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mysmcc/com.mysmcc.activities.AppMainActivity}: java.lang.StringIndexOutOfBoundsException: length=0; index=0 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2695) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2769) at android.app.ActivityThread.access$900(ActivityThread.java:177) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1430) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5910) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1405) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1200) Caused by: java.lang.StringIndexOutOfBoundsException: length=0; index=0 at java.lang.String.indexAndLength(String.java:500) at java.lang.String.charAt(String.java:494) at android.graphics.Color.parseColor(Color.java:209) at com.mysmcc.activities.AppMainActivity.onCreate(AppMainActivity.java:213) at android.app.Activity.performCreate(Activity.java:6178) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2648) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2769) at android.app.ActivityThread.access$900(ActivityThread.java:177) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1430) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5910) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1405) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1200)

GoogleSign in error only on Xiomi Devices

Using com.google.android.gms:play-services-auth:10.0.1 for google signin in android app and its not working on xiomi devices and on other devices its working.
Stacktrace :
Fatal Exception: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.myapp/com.google.android.gms.auth.api.signin.internal.SignInHubActivity}: java.lang.IllegalStateException: Bad magic number for Bundle: 0xffff4f45
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2332)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2394)
at android.app.ActivityThread.access$800(ActivityThread.java:154)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1308)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5276)
at java.lang.reflect.Method.invoke(Method.java)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:911)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:706) Caused by java.lang.IllegalStateException: Bad magic number for Bundle: 0xffff4f45
at android.os.Parcel.readException(Parcel.java:1554)
at android.os.Parcel.readException(Parcel.java:1499)
at android.app.ActivityManagerProxy.startActivity(ActivityManagerNative.java:2441)
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1500)
at android.app.Activity.startActivityForResult(Activity.java:3796)
at android.app.Activity.startActivityForResult(Activity.java:3757)
at android.support.v4.app.FragmentActivity.startActivityForResult(SourceFile:842)
at com.google.android.gms.auth.api.signin.internal.SignInHubActivity.zzj(Unknown Source)
at com.google.android.gms.auth.api.signin.internal.SignInHubActivity.onCreate(Unknown Source)
at android.app.Activity.performCreate(Activity.java:6041)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1109)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2285)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2394)
at android.app.ActivityThread.access$800(ActivityThread.java:154)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1308)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5276)
at java.lang.reflect.Method.invoke(Method.java)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:911)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:706)

Android Studio - Unable to choose declaration

I am trying to create an app with a navigation drawer and four fragments. So as I select the option from navigation drawer the view of the fragment gets displayed. Now, I have certain buttons created for the view, but whenever i am trying to initialize them in the code, i am getting runtime error which is pasted below.
When I did Command + Click on those ids R.id.bIndexOutOfBounds button, it showed me multiple declaration. I am unable to get how to choose a specific declaration, and why is android studio looking for 4 different fragment_crash.xml file ( layout file for the fragment) when only 1 file is present.
Please help me if anyone knows how to get only 1 layout_crash.xml file.
04-01 14:34:10.256 2067-2067/com.example.android.navigationdrawer E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.example.android.navigationdrawer, PID: 2067
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.android.navigationdrawer/com.example.android.navigationdrawer.NavigationDrawerActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.View.findViewById(int)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
at android.app.ActivityThread.access$800(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.View.findViewById(int)' on a null object reference
at com.example.android.navigationdrawer.CrashFragment.onCreateView(CrashFragment.java:56)
at android.app.Fragment.performCreateView(Fragment.java:2053)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:894)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1067)
at android.app.BackStackRecord.run(BackStackRecord.java:833)
at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1452)
at android.app.Activity.performStart(Activity.java:5948)
at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2261)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
            at android.app.ActivityThread.access$800(ActivityThread.java:144)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5221)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)

You should use "view" instead of "getView()" in bIndexOutOfBounds = (Button) getView().findViewById(R.id.bIndexOutOfBounds);
getView() will return the root view of a fragment which is returned by onCreateView() so you cannot get view by getView() inside of onCreateView()