Scroll View Example in Android Studio using Java

Scroll View layout is one of the layout types in Android which is useful to load more content in one screen at a single view page. Based on content Scroll View will extend and show the content on screen. The scroll view will contain one linear view and load a string of content. Also, the list view can show the list of data in a linear layout.

Two types of scroll views are vertical and horizontal layouts. Let's see xml page example.

Vertical Scroll View layout

<ScrollView
    android:id="@+id/ScrollView"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1">
    <LinearLayout
        android:id="@+id/Container"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" />
</ScrollView>

Horizontal Scroll View layout

<HorizontalScrollView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <LinearLayout
        android:id="@+id/Container"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" />
</HorizontalScrollView>

Let's take the Note App example, added note's content showing in list with Linear layout. It's inside the scroll view, so a lot of content can be saved in the same layout. Many real-time apps will use the scroll view like YouTube, google, etc..

Java Code

import androidx.appcompat.app.AppCompatActivity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
public class NotesActivity extends AppCompatActivity {
    private static final String PREFS_NAME = "NotePrefs";
    private static final String KEY_NOTE_COUNT = "NoteCount";
    private LinearLayout notesContainer;
    private List<Note> noteList;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_notes);
        notesContainer=findViewById(R.id.notesContainer);
        Button saveButton =findViewById(R.id.saveButton);
        noteList = new ArrayList<>();
        saveButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                saveNote();
            }
        });
        displayNotes();
    }
    private void displayNotes() {
        for (Note note : noteList) {
            createNoteView(note);
        }
    }
    private void saveNote() {
        EditText titleEditText = findViewById(R.id.titleEditText);
        EditText contentEditText = findViewById(R.id.contentEditText);
        String title = titleEditText.getText().toString();
        String content = contentEditText.getText().toString();
        if (!title.isEmpty() && !content.isEmpty()) {
            Note note = new Note();
            note.setTitle(title);
            note.setContent(content);

            noteList.add(note);
            saveNotesToPreferences();

            createNoteView(note);
            clearInputFields();
        }
    }
    private void clearInputFields() {
        EditText titleEditText = findViewById(R.id.titleEditText);
        EditText contentEditText = findViewById(R.id.contentEditText);

        titleEditText.getText().clear();
        contentEditText.getText().clear();
    }
    private void createNoteView(final Note note) {
        View noteView = getLayoutInflater().inflate(R.layout.note_item,null);
        TextView titleTextView = noteView.findViewById(R.id.titleTextView);
        TextView contentTextView = noteView.findViewById(R.id.contentTextView);

        titleTextView.setText(note.getTitle());
        contentTextView.setText(note.getContent());

        noteView.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View v) {
                showDeleteDialog(note);
                return true;
            }
        });
        notesContainer.addView(noteView);
    }
    private void showDeleteDialog(final Note note) {

        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("Delete this note.");
        builder.setMessage("Are you sure you want to delete this note?");
        builder.setPositiveButton("Delete", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                deleteNoteAndRefresh(note);
            }
        });
        builder.setNegativeButton("Cancel", null);
        builder.show();
    }
    private void deleteNoteAndRefresh(Note note) {
        noteList.remove(note);
        saveNotesToPreferences();
        refreshNoteViews();
    }
    private void refreshNoteViews() {
        notesContainer.removeAllViews();
        displayNotes();
    }
    private void saveNotesToPreferences() {
        SharedPreferences sharedPreferences = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
        SharedPreferences.Editor editor = sharedPreferences.edit();

        editor.putInt(KEY_NOTE_COUNT, noteList.size());
        for (int i = 0; i < noteList.size(); i ++) {
            Note note = noteList.get(i);
            editor.putString("note_title_" + i, note.getTitle());
            editor.putString("note_content_" + i, note.getContent());
        }
        editor.apply();
    }
}

XML Code

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="16dp"
    android:background="#3C10"
    tools:context=".NotesActivity">
    <LinearLayout
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintTop_toTopOf="parent">
        <Button
            android:id="@+id/saveButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:text="Add" />
        <EditText
            android:id="@+id/titleEditText"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@drawable/edittext_bg"
            android:hint="Header -Title  "
            android:paddingLeft="10dp"
            android:textColor="@color/black" />
        <EditText
            android:id="@+id/contentEditText"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginTop="16dp"
            android:background="@drawable/edittext_bg"
            android:hint="Description"
            android:inputType="textMultiLine"
            android:minLines="3"
            android:paddingLeft="10dp"
            android:paddingRight="10dp"
            android:textColor="@color/black" />
    </LinearLayout>
    <TextView
        android:id="@+id/notesTextView"
        android:layout_width="match_parent"
        android:layout_height="30dp"
        android:layout_marginTop="16dp"
        android:text="Scroll View in List added Notes"
        android:textSize="25dp"
        android:textStyle="bold"
        />
    <ScrollView
        android:id="@+id/notesScrollView"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1">
        <LinearLayout
            android:id="@+id/notesContainer"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical" />
    </ScrollView>
</LinearLayout>

Output

Add