Android app make a page appear before a new activity

You can achieve this by using an Activity with a Dialog or a Fragment with a Dialog to display a page before starting a new Activity. Here are a few ways to do it:

Method 1: Using a Dialog Activity

Create a new Activity that will display the page you want to show before starting the new Activity. In this Activity, use a Dialog to display the page. When the user clicks a button or performs an action, start the new Activity.

Here's an example:

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

        // Display the page
        Dialog dialog = new Dialog(this);
        dialog.setContentView(R.layout.before_page);
        dialog.show();
    }

    public void startNewActivity(View view) {
        // Start the new Activity
        Intent intent = new Intent(this, NewActivity.class);
        startActivity(intent);
        finish();
    }
}

Method 2: Using a Fragment with a Dialog

Create a new Fragment that will display the page you want to show before starting the new Activity. In this Fragment, use a Dialog to display the page. When the user clicks a button or performs an action, start the new Activity.

Here's an example:

public class BeforeFragment extends Fragment {
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.before_fragment, container, false);

        // Display the page
        Dialog dialog = new Dialog(getActivity());
        dialog.setContentView(R.layout.before_page);
        dialog.show();

        // Start the new Activity
        Button button = view.findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(getActivity(), NewActivity.class);
                startActivity(intent);
                getActivity().finish();
            }
        });

        return view;
    }
}

Method 3: Using a Transition

You can also use a transition to display the page before starting the new Activity. This method is more complex, but it provides a more seamless transition between the two Activities.

Here's an example:

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

        // Display the page
        View page = findViewById(R.id.before_page);

        // Start the new Activity
        Intent intent = new Intent(this, NewActivity.class);
        startActivity(intent);

        // Use a transition to display the page
        Transition transition = TransitionInflater.from(this).inflateTransition(R.transition.slide_in);
        getWindow().setEnterTransition(transition);
        getWindow().setExitTransition(transition);
    }
}

In this example, we use a Transition to display the page before starting the new Activity. The Transition is defined in the before_activity.xml file:

<?xml version="1.0" encoding="utf-8"?>
<transition xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="500"
    android:interpolator="@android:anim/accelerate_decelerate_interpolator"
    android:startOnExit="true">
    <slide
        android:duration="500"
        android:interpolator="@android:anim/accelerate_decelerate_interpolator"
        android:slideDirection="left" />
</transition>

These are just a few examples of how you can make a page appear before a new Activity in an Android app. The best method for your app will depend on your specific requirements and design goals.