Activity crashed after starting new Fragment

Question

I try to make my StartActivity class can dynamically change from one Fragment to another, such as first it will open up LoginFragment. If user does not have any account they could register new account. Login and register would be two different fragments in a single activity.

Here's the StartAcitivity.class

public class StartActivity extends AppCompatActivity{
   @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_start);

        if (savedInstanceState == null) {
            getSupportFragmentManager()
                    .beginTransaction()
                    .add(R.id.flDetailContainer, new LoginFragment(), "LOGIN")
                    .commit();
        }
    }
}

My LoginFragment.class

public class LoginFragment extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_login, parent, false);
    }
}

And the activity_start.xml layout

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/flDetailContainer"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:paddingBottom="@dimen/activity_vertical_margin"
     android:paddingLeft="@dimen/activity_horizontal_margin"
     android:paddingRight="@dimen/activity_horizontal_margin"
     android:paddingTop="@dimen/activity_vertical_margin">

</FrameLayout>

My fragment_login.xml layout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent" android:layout_height="match_parent"
              android:orientation="vertical" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="TextView" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button" />

</LinearLayout>

And the error I got.

E/AndroidRuntime: FATAL EXCEPTION: main
                  Process: com.example.asus.carclubapps, PID: 2748
                  java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.asus.carclubapps/com.example.asus.carclubapps.StartActivity}: java.lang.IllegalArgumentException: No view found for id 0x7f0c006f (com.example.asus.carclubapps:id/activity_start) for fragment RegistrationFragment{85ef24b #0 id=0x7f0c006f}
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
                      at android.app.ActivityThread.-wrap11(ActivityThread.java)
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
                      at android.os.Handler.dispatchMessage(Handler.java:102)
                      at android.os.Looper.loop(Looper.java:148)
                      at android.app.ActivityThread.main(ActivityThread.java:5417)
                      at java.lang.reflect.Method.invoke(Native Method)
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
                   Caused by: java.lang.IllegalArgumentException: No view found for id 0x7f0c006f (com.example.asus.carclubapps:id/activity_start) for fragment RegistrationFragment{85ef24b #0 id=0x7f0c006f}
                      at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1098)
                      at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1286)
                      at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:758)
                      at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1671)
                      at android.support.v4.app.FragmentController.execPendingActions(FragmentController.java:388)
                      at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:619)
                      at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1237)
                      at android.app.Activity.performStart(Activity.java:6253)
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2379)
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 
                      at android.app.ActivityThread.-wrap11(ActivityThread.java) 
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
                      at android.os.Handler.dispatchMessage(Handler.java:102) 
                      at android.os.Looper.loop(Looper.java:148) 
                      at android.app.ActivityThread.main(ActivityThread.java:5417) 
                      at java.lang.reflect.Method.invoke(Native Method) 
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

I do have RegistrationFragment and fragment_registration, but the thing is on my StartActivity I only call for LoginFragment not RegistrationFragment yet. Am I missing something here?

---

RegistrationFragment

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

/**
 * Created by Asus on 11/27/2016.
 */

public class RegistrationFragment extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_registration, parent, false);
    }
}

fragment_registration

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="match_parent"
              android:layout_height="match_parent">
    <TextView
        android:gravity="center_horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/title_registration"/>

</LinearLayout>

Answer 1

From Logs its clear in your RegistrationFragment you are trying to access some view which actually not exist in your attached layout file of fragment.

So confirm in your RegistrationFragment that you attached correct view. Because generally this error(View not found) comes when you trying to use view which actually not exist with current attached view.

If still not works then try to invalidate cache and restart you Android Studio.

Answer 2

the error is coming from another Activity, Mainly the Registerfragment. The view is incorrect.

 Unable to start activity --> No view found for fragment RegistrationFragment

If you fix the view and the problem is persistant, kindly update us and we will work it out promptly.

Answer 3

The logcat clearly indicates that the problem is in your RegistrationFragment in the activity_start.xml layout.

No view found for id 0x7f0c006f (com.example.asus.carclubapps:id/activity_start) for fragment RegistrationFragment{85ef24b #0 id=0x7f0c006f}

It also says you're referring to an invalid view which doesn't really exists in your activity_start.xml layout.

Here's your activity_start.xml layout

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/flDetailContainer"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:paddingBottom="@dimen/activity_vertical_margin"
     android:paddingLeft="@dimen/activity_horizontal_margin"
     android:paddingRight="@dimen/activity_horizontal_margin"
     android:paddingTop="@dimen/activity_vertical_margin">

</FrameLayout>

I see one and only FrameLayout with id flDetailContainer which you might not want to get from your RegisterFragment. I think you're getting wrong view inside your RegisterFragment where you're getting the view from layout using LayoutInflater.

I guess, there's a layout called fragment_register.xml. You need to get the view from that layout in your RegisterFragment.

In that case your onCreateView function of the RegisterFragment may look like

public class RegisterFragment extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_register, parent, false);
    }
}