Java how to show full search bar in android studio

To show a full search bar in an Android app using Android Studio, you can use the SearchView widget. The SearchView widget provides a user interface for entering and submitting a search query, and it can be integrated into the action bar or displayed as a standalone view.

Here's an example of how you can use the SearchView widget in your XML layout file:

<androidx.appcompat.widget.SearchView
    android:id="@+id/search_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:iconifiedByDefault="false"
    android:queryHint="Search" />

This will create a SearchView widget with the default appearance and behavior. The iconifiedByDefault attribute specifies whether the search view should be collapsed by default, and the queryHint attribute specifies the hint text that is displayed when the search view is empty.

To listen for search queries and perform a search, you can use the setOnQueryTextListener method of the SearchView widget and implement the OnQueryTextListener interface.

Here's an example of how you can set up a SearchView widget in your Java code:

SearchView searchView = findViewById(R.id.search_view);
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
    @Override
    public boolean onQueryTextSubmit(String query) {
        // Perform the search here
        return false;
    }

    @Override
    public boolean onQueryTextChange(String newText) {
        // Update the search results here
        return false;
    }
});

This will set up a SearchView widget that listens for search queries and performs a search when the user submits the query. The onQueryTextChange method can be used to update the search results in real-time as the user types.

You can also customize the appearance and behavior of the SearchView widget using various XML attributes and methods. For example, you can change the color of the search icon, the hint text, or the background of the search view. You can also specify whether the search view should be collapsible or expandable, or whether it should be displayed as a standalone view or integrated into the action bar.