How to Load fragment when the app launches

How to Load fragment when the app launches

fragments - android
android fragment tutorial with example
add fragment to activity
android multiple fragments in one activity example
android fragment vs activity
activity and fragment lifecycle
adding fragment to activity xml
adding fragment to activity dynamically

I have created an app which basically has navigation drawer and I wish to load an fragment "home" whenever the activity launches instead of main activity. Any idea how to do it.


You can call this method to view Fragments. In your case call this method on your onCreate()

//Fragment Changer
    public void changeFragment(Fragment targetfragment) {
        getSupportFragmentManager()
                .beginTransaction()
                .replace(R.id.content_fragment, targetfragment, "fragment")
                .setTransitionStyle(FragmentTransaction.TRANSIT_FRAGMENT_FADE)
                .addToBackStack(null)
                .commitAllowingStateLoss();
    }

Example Usage

 changeFragment(new YourFragment());

Fragments, Adding a user interface; Adding a fragment to an activity the application starts a new activity to show the summary, instead of loading a  Next, you’ll want to add a few fragments. To do so, right click on your project, or go to File –> New and from the Fragment list choose Fragment (Blank). Add at least two fragments to your project so you can demonstrate moving between them. The next step is to load a fragment when the app first launches.


Basic solution can be implementing something like the below code in your onCreate method.

// get fragment manager
FragmentManager fm = getFragmentManager();

// replace
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.main_layout, new HomeFragment());
ft.commit();

Test your app's fragments, In your app's UI tests, it's usually sufficient to just launch and recreate the fragment under test. In finer-grained unit tests, however, you might also evaluate the  How to open New Fragment From Fragment by Button Click | Android Studio Fragments Complete TuTorial - Duration: 5:37. Tips and Tricks - Rohan 7,121 views


Your Activity:

public class MainActivity extends AppCompatActivity {
    public static final String TAG = MainActivity.class.getSimpleName();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_activity);
    }

    public String getHelloMessage() {
        return "Hello!";
    }
}

Your View:

public class MainView extends Fragment {

    // Declarations
    private Button testButton;

    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.main_view, container, false);

        // Getting the reference of controller from Application
        MainController mainController = Application.getInstance().getMainController();

        // Initializing view objects
        testButton = view.findViewById(R.id.test_button);

        // Setting actions
        testButton.setOnClickListener(mainController.getTestAction());

        return view;
    }

    // Reference to the view Object
    public Button getTestButton() {
        return testButton;
    }

Your main_activity.xm lto connect the fragment

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/containerMainView"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <fragment
        android:id="@+id/mainView"
        android:name="com.template.views.MainView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</FrameLayout>

Your main_view.xml file your final view definition

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

    <Button
        android:id="@+id/test_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:text="@string/say_hello" />
</RelativeLayout>

How to launch a fragment from an activity on button click in Android , How do I make option menu in Android app development? You don't launch a fragment, you load one to the activity's layout or replace an already populated  [code]Put this code on click listener to the button. Fragment fragment = CustomFragment.newInstance(); FragmentTransaction transaction = getSupportFragmentManager


Adding a Flutter Fragment to an Android app, FlutterFragment allows developers to control the following details of the Flutter experience within the Fragment : Initial Flutter route; Dart entrypoint to execute  The fragment you want to start could also live in another activity. In that case, in the onClick() callback you use an Intent to start that activity and then you can use a FragmentTransaction to start your fragment dynamically similar to the code above. Let me know if you have any questions.


Building dynamic user interfaces in Android with fragments, If a detail fragment is not available, the main activity starts the detailed activity. Which option to To define a new fragment you either extend the android.app.​Fragment Adding fragments statically to the layout file. To use  Using the Package Explorer panel, locate and double click on the new layout file to load it into the Graphical Layout tool. Click on the toolbar_fragment.xml tab along the bottom of the layout tool panel to access the XML directly. Modify the current XML to configure the fragment with the three required views:


Android Fragments Tutorial: An Introduction with Kotlin , And with that, you've added the fragment! Build, run and you'll see a dog list once the app launches:. onCreate() is called to do initial creation of the fragment. onCreateView() is called by Android once the Fragment should inflate a view. onViewCreated() is called after onCreateView() and ensures that the fragment's root view is non-null. Any view setup should happen here. E.g., view lookups, attaching listeners.