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To create a PDF reader in Android Studio that can:

Navigate to a specific page (using a given page number).

Support fancy scrolling (navigate one page at a time with a smooth transition).
You'll need to use the following libraries and steps:

Step 1: Add Required Dependencies

First, you'll need to add the necessary dependencies to your build.gradle (app-
level) file for PDF rendering and handling. A popular library for rendering PDFs in
Android is AndroidPdfViewer.

gradle
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dependencies {
implementation 'com.github.barteksc:android-pdf-viewer:3.2.0-beta.1' // For
rendering PDFs
implementation 'androidx.recyclerview:recyclerview:1.2.1' // For smooth
scrolling (if needed)
}
After adding these dependencies, click Sync Now in Android Studio.

Step 2: Create the Layout

You need to set up the XML layout for your activity, where the PDF will be
displayed, and the user can navigate between pages.

xml
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<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
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"
tools:context=".MainActivity">

<com.github.barteksc.pdfviewer.PDFView
android:id="@+id/pdfView"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />

<!-- EditText for entering page number -->

<EditText
android:id="@+id/pageNumberEditText"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:hint="Enter Page No."
android:inputType="number"
app:layout_constraintBottom_toTopOf="@id/pdfView"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent" />

<!-- Button to go to the entered page -->

 <Button
android:id="@+id/goButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Go"
app:layout_constraintTop_toBottomOf="@id/pageNumberEditText"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toBottomOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>
Step 3: Implement PDF Reader in Activity
Now, implement the logic in the MainActivity.java (or MainActivity.kt if you're
using Kotlin).

java
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package com.example.pdfreader;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import com.github.barteksc.pdfviewer.PDFView;
import com.github.barteksc.pdfviewer.listener.OnPageChangeListener;

public class MainActivity extends AppCompatActivity {

private PDFView pdfView;

private EditText pageNumberEditText;
private Button goButton;

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

pdfView = findViewById(R.id.pdfView);
pageNumberEditText = findViewById(R.id.pageNumberEditText);
goButton = findViewById(R.id.goButton);

// Load a PDF file from assets

pdfView.fromAsset("sample.pdf")
.enableSwipe(true) // Allow swipe gestures
.swipeHorizontal(true) // Scroll horizontally (right to left, left
to right)
.onPageChange(new OnPageChangeListener() {
@Override
public void onPageChanged(int page, int pageCount) {
// You can add code here to display the current page number
}
})
.load();

// Set up the "Go" button to jump to the specified page

 goButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String pageNumberStr = pageNumberEditText.getText().toString();
if (!pageNumberStr.isEmpty()) {
int pageNumber = Integer.parseInt(pageNumberStr);
if (pageNumber >= 1 && pageNumber <= pdfView.getPageCount()) {
pdfView.jumpTo(pageNumber - 1, true); // Jump to the
desired page (0-indexed)
} else {
Toast.makeText(MainActivity.this, "Invalid page number",
Toast.LENGTH_SHORT).show();
}
}
}
});
}
}
Key Features in the Code:
pdfView.fromAsset("sample.pdf") - This loads the PDF file from the assets folder
(make sure you have a PDF file placed in the assets folder of your project).
Swipe functionality - By calling swipeHorizontal(true), the PDF pages scroll
horizontally.
jumpTo() - This method lets you navigate to a specific page in the PDF.
OnPageChangeListener - You can track the page change and display the current page,
if needed.
Navigation to a specific page - The Go button allows the user to input a page
number and navigate to that page.
Step 4: Customize Scrolling
You can customize the scroll transitions using the following attributes:

enableSwipe(true) - Allows the user to swipe through pages.

swipeHorizontal(true) - Changes the direction of scrolling (left to right or right
to left).
onPageChange() - You can use this listener to handle events when the page changes,
such as updating UI components.
Step 5: Add Permissions (if needed)
If you're loading a PDF from external storage (e.g., ExternalStorageDirectory),
make sure to request the appropriate permissions in AndroidManifest.xml:

xml
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<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
Final Considerations:
PDF Loading: If you need to load the PDF from external storage or a URL, you can
adjust the PDF loading logic (fromAsset() can be replaced with fromUri() or
fromFile()).
Scrolling Effects: If you want fancy scroll effects, you can experiment with
setDefaultPage() to set a specific page on startup or add animations while
transitioning between pages.
With this setup, you'll have a working PDF reader with smooth scrolling and
navigation capabilities in your Android app.

DeepSeek

Creating a PDF reader in Android Studio with the ability to jump to a specific page
and scroll horizontally (left/right) page by page involves several steps. Below is
a step-by-step guide to help you build this:

Step 1: Set Up Your Project

Open Android Studio and create a new project.

Choose "Empty Activity" as the template.

Name your project (e.g., PDFReaderApp).

Set the minimum SDK to at least API 21 (Android 5.0).

Step 2: Add Dependencies

To handle PDF rendering, you can use a library like PdfViewer. Add the following
dependency to your build.gradle file:

gradle
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dependencies {
implementation 'com.github.barteksc:android-pdf-viewer:3.2.0-beta.1'
}
Sync your project after adding the dependency.

Step 3: Design the Layout

In the res/layout/activity_main.xml file, create a layout with a PDFView for
displaying the PDF and a EditText + Button for jumping to a specific page.

xml
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<?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">

<com.github.barteksc.pdfviewer.PDFView
android:id="@+id/pdfView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="@+id/controlsLayout" />

<LinearLayout
android:id="@+id/controlsLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:orientation="horizontal"
android:padding="10dp"
android:background="@android:color/white">

<EditText
android:id="@+id/pageNumberInput"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:hint="Enter page number"
android:inputType="number" />

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

</LinearLayout>

</RelativeLayout>
Run HTML
Step 4: Load and Display the PDF
In your MainActivity.java, load the PDF and handle page navigation.

java
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package com.example.pdfreaderapp;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import androidx.appcompat.app.AppCompatActivity;
import com.github.barteksc.pdfviewer.PDFView;
import com.github.barteksc.pdfviewer.scroll.DefaultScrollHandle;

public class MainActivity extends AppCompatActivity {

private PDFView pdfView;

private EditText pageNumberInput;
private Button goToPageButton;

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

pdfView = findViewById(R.id.pdfView);
pageNumberInput = findViewById(R.id.pageNumberInput);
goToPageButton = findViewById(R.id.goToPageButton);

// Load the PDF from assets (you can also load from storage or a URL)
pdfView.fromAsset("sample.pdf")
.defaultPage(0) // Start from the first page
.enableSwipe(true) // Enable swipe to scroll
.swipeHorizontal(true) // Enable horizontal scrolling
.enableDoubletap(true) // Enable double-tap to zoom
.scrollHandle(new DefaultScrollHandle(this)) // Add a scroll handle
.spacing(10) // Add spacing between pages
.load();

// Handle "Go to Page" button click

goToPageButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String pageNumberStr = pageNumberInput.getText().toString();
if (!pageNumberStr.isEmpty()) {
int pageNumber = Integer.parseInt(pageNumberStr) - 1; //
Convert to 0-based index
if (pageNumber >= 0 && pageNumber < pdfView.getPageCount()) {
pdfView.jumpTo(pageNumber); // Jump to the specified page
}
}
 }
});
}
}
Step 5: Add a Sample PDF
Create an assets folder in the src/main directory.

Place a sample PDF file (e.g., sample.pdf) in the assets folder.

Step 6: Test the App

Run the app on an emulator or physical device.

The PDF should load, and you should be able to:

Scroll horizontally to navigate between pages.

Enter a page number and jump to that page.

Optional Enhancements
Page Indicators: Add a TextView to show the current page number and total pages.

Zoom Controls: Add buttons to zoom in/out.

Night Mode: Add a toggle to switch between light and dark themes.

File Picker: Allow users to select PDFs from their device storage.

Example Output
The app will display a PDF with horizontal scrolling.

Users can enter a page number and click "Go" to navigate to that page.

Let me know if you need further assistance!