Android Generate PDF From View Tutorial is today’s theme.
You can create the pdf file from any layout of your application programmatically.
In this example, we will generate our pdf file from xml layouts like linearlayout and scrollview.
I have not used any third party library in this tutorial.
At the end of the tutorial, you will be able to generate the PDF document from the current activity.
We will also save the generated pdf file in the internal storage.
Our Generated PDF
Below video showcases our PDF file.
Step 1. Changes in the gradle file
We are going to use PdfDocument class in this example. Now this PdfDocument class supports sdk version greater than 18.
Hence, we have to set the minSdkVersion as greater than 18 in the build.gradle(Module: app) file.
We require two permissions (Read and Write) in this example.
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
Add above two permissions in the AndroidManifest.xml file.
I have set the targetSdkVersion as 22 here. If you are targeting sdk version greater than 22 then you need to request for runtime permissions.
You can get reference for runtime permissions from this android marshmallow permissions guide.
So the final source code for build.gradle(Module: app) file is like below
apply plugin: 'com.android.application'
android {
compileSdkVersion 27
defaultConfig {
applicationId "com.example.parsaniahardik.pdffromimagetext"
minSdkVersion 19
targetSdkVersion 22
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:27.1.1'
implementation 'com.android.support.constraint:constraint-layout:1.1.2'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}
Step 2. activity_main.xml and MainActivity.java
Now we will create a pdf file from linearlayout.
This linearlayout contains one image, one textview and two buttons.
The height of the linearlayout is not so long that we need to use scrollview here. However, we will also learn how to make a pdf file that covers the whole scrollview later.
Copy the following code in activity_main.xml file
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff"
android:orientation="vertical">
<LinearLayout
android:id="@+id/llPdf"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#fff"
android:orientation="vertical">
<Button
android:id="@+id/btn"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Create PDF" />
<ImageView
android:id="@+id/iv"
android:layout_width="300dp"
android:layout_height="200dp"
android:layout_marginLeft="30dp"
android:layout_marginTop="10dp"
android:src="@drawable/pyramid" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="30dp"
android:layout_marginTop="10dp"
android:text="Pyramid from Egypt"
android:textSize="30sp" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/btnScroll"
android:layout_marginTop="20dp"
android:layout_marginLeft="20dp"
android:text="Make PDF Of ScrollView"/>
</LinearLayout>
</LinearLayout>
Now add below source code in MainActivity.java file
import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.pdf.PdfDocument;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.Display;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
public class MainActivity extends AppCompatActivity {
private Button btn, btnScroll;
private LinearLayout llPdf;
private Bitmap bitmap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn = findViewById(R.id.btn);
btnScroll = findViewById(R.id.btnScroll);
llPdf = findViewById(R.id.llPdf);
btnScroll.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,ScrollActivity.class);
startActivity(intent);
}
});
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d("size"," "+llPdf.getWidth() +" "+llPdf.getWidth());
bitmap = loadBitmapFromView(llPdf, llPdf.getWidth(), llPdf.getHeight());
createPdf();
}
});
}
public static Bitmap loadBitmapFromView(View v, int width, int height) {
Bitmap b = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
v.draw(c);
return b;
}
private void createPdf(){
WindowManager wm = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
// Display display = wm.getDefaultDisplay();
DisplayMetrics displaymetrics = new DisplayMetrics();
this.getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
float hight = displaymetrics.heightPixels ;
float width = displaymetrics.widthPixels ;
int convertHighet = (int) hight, convertWidth = (int) width;
// Resources mResources = getResources();
// Bitmap bitmap = BitmapFactory.decodeResource(mResources, R.drawable.screenshot);
PdfDocument document = new PdfDocument();
PdfDocument.PageInfo pageInfo = new PdfDocument.PageInfo.Builder(convertWidth, convertHighet, 1).create();
PdfDocument.Page page = document.startPage(pageInfo);
Canvas canvas = page.getCanvas();
Paint paint = new Paint();
canvas.drawPaint(paint);
bitmap = Bitmap.createScaledBitmap(bitmap, convertWidth, convertHighet, true);
paint.setColor(Color.BLUE);
canvas.drawBitmap(bitmap, 0, 0 , null);
document.finishPage(page);
// write the document content
String targetPdf = "/sdcard/pdffromlayout.pdf";
File filePath;
filePath = new File(targetPdf);
try {
document.writeTo(new FileOutputStream(filePath));
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(this, "Something wrong: " + e.toString(), Toast.LENGTH_LONG).show();
}
// close the document
document.close();
Toast.makeText(this, "PDF is created!!!", Toast.LENGTH_SHORT).show();
openGeneratedPDF();
}
private void openGeneratedPDF(){
File file = new File("/sdcard/pdffromlayout.pdf");
if (file.exists())
{
Intent intent=new Intent(Intent.ACTION_VIEW);
Uri uri = Uri.fromFile(file);
intent.setDataAndType(uri, "application/pdf");
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
try
{
startActivity(intent);
}
catch(ActivityNotFoundException e)
{
Toast.makeText(MainActivity.this, "No Application available to view pdf", Toast.LENGTH_LONG).show();
}
}
}
}
Step 3. Information about Main Activity code
Now let us learn the code of the Main Activity step by step.
Consider below code
btn = findViewById(R.id.btn); btnScroll = findViewById(R.id.btnScroll); llPdf = findViewById(R.id.llPdf);
two buttons and linearlayout is found here with help of their ids.
llPdf is the linearlayout using which we will create the PDF file.
Let us understand following code
btnScroll.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,ScrollActivity.class);
startActivity(intent);
}
});
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d("size"," "+llPdf.getWidth() +" "+llPdf.getWidth());
bitmap = loadBitmapFromView(llPdf, llPdf.getWidth(), llPdf.getHeight());
createPdf();
}
});
click event of btnScroll will open a new activity. We will create pdf file with scrollview in this activity.
Second is the button click where we will generate the pdf document from linearlayout.
First of all, we will create the bitmap from the height and width of the linearlayout using loadBitmapFromView() method.
Here is the code for the loadBitmapFromView() method.
public static Bitmap loadBitmapFromView(View v, int width, int height) {
Bitmap b = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
v.draw(c);
return b;
}
We need to pass height and width of the linearlayout in the parameter.
This method will create a bitmap using canvas class and will return that bitmap.
After this, compiler will call the createPdf() method, which will finally generate the PDF file.
Code for createPdf() method is as per following lines
private void createPdf(){
WindowManager wm = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
// Display display = wm.getDefaultDisplay();
DisplayMetrics displaymetrics = new DisplayMetrics();
this.getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
float hight = displaymetrics.heightPixels ;
float width = displaymetrics.widthPixels ;
int convertHighet = (int) hight, convertWidth = (int) width;
// Resources mResources = getResources();
// Bitmap bitmap = BitmapFactory.decodeResource(mResources, R.drawable.screenshot);
PdfDocument document = new PdfDocument();
PdfDocument.PageInfo pageInfo = new PdfDocument.PageInfo.Builder(convertWidth, convertHighet, 1).create();
PdfDocument.Page page = document.startPage(pageInfo);
Canvas canvas = page.getCanvas();
Paint paint = new Paint();
canvas.drawPaint(paint);
bitmap = Bitmap.createScaledBitmap(bitmap, convertWidth, convertHighet, true);
paint.setColor(Color.BLUE);
canvas.drawBitmap(bitmap, 0, 0 , null);
document.finishPage(page);
// write the document content
String targetPdf = "/sdcard/pdffromlayout.pdf";
File filePath;
filePath = new File(targetPdf);
try {
document.writeTo(new FileOutputStream(filePath));
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(this, "Something wrong: " + e.toString(), Toast.LENGTH_LONG).show();
}
// close the document
document.close();
Toast.makeText(this, "PDF is created!!!", Toast.LENGTH_SHORT).show();
openGeneratedPDF();
}
First the compiler will set the height and width of the pdf by using WindowManager and DisplayMetrics classes.
PdfDocument class will create a new pdf file object.
Then the compiler will fill this newly generated pdf file using Canvas and Paint classes.
Read the below line
String targetPdf = "/sdcard/pdffromlayout.pdf";
Above line will define a name of the pdf file and a path where this pdf document will be saved.
After generating the pdf file successfully, compiler will open this file using openGeneratedPDF() method.
Learning openGeneratedPDF()
Following is the source code for this method
private void openGeneratedPDF(){
File file = new File("/sdcard/pdffromlayout.pdf");
if (file.exists())
{
Intent intent=new Intent(Intent.ACTION_VIEW);
Uri uri = Uri.fromFile(file);
intent.setDataAndType(uri, "application/pdf");
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
try
{
startActivity(intent);
}
catch(ActivityNotFoundException e)
{
Toast.makeText(MainActivity.this, "No Application available to view pdf", Toast.LENGTH_LONG).show();
}
}
}
We need to give a path to the pdf file in the below line
File file = new File("/sdcard/pdffromlayout.pdf");
After this, compiler will open a pdf document using Intent as per shown in the source code.
Step 4. Making PDF from Scrollview
Create a new activity named Scroll Activity.
Add below code in activity_scroll.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff"
android:orientation="vertical">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/llScroll"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#fff"
android:orientation="vertical">
<Button
android:id="@+id/btn"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Create PDF" />
<ImageView
android:id="@+id/iv"
android:layout_width="300dp"
android:layout_height="300dp"
android:layout_marginLeft="30dp"
android:layout_marginTop="10dp"
android:src="@drawable/empire" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="30dp"
android:layout_marginTop="10dp"
android:text="Empire state building is located in the New York, US"
android:textSize="30sp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="30dp"
android:layout_marginTop="10dp"
android:text="Empire state building is located in the New York, US"
android:textSize="30sp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="30dp"
android:layout_marginTop="10dp"
android:text="Empire state building is located in the New York, US"
android:textSize="30sp" />
</LinearLayout>
</ScrollView>
</LinearLayout>
I have taken one button, one imageview and three textview. All these three widgets are the childd of the linearlayout.
Now scrollview is the parent of the linearlayout. We will generate the pdf file using this linearlayout which is the child of the scrollview.
Further, write below codes in the ScrollActivity.java file
import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.pdf.PdfDocument;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.Toast;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
public class ScrollActivity extends AppCompatActivity {
private Button btn;
private LinearLayout llScroll;
private Bitmap bitmap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_scroll);
btn = findViewById(R.id.btn);
llScroll = findViewById(R.id.llScroll);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d("size"," "+llScroll.getWidth() +" "+llScroll.getWidth());
bitmap = loadBitmapFromView(llScroll, llScroll.getWidth(), llScroll.getHeight());
createPdf();
}
});
}
public static Bitmap loadBitmapFromView(View v, int width, int height) {
Bitmap b = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
v.draw(c);
return b;
}
private void createPdf(){
WindowManager wm = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
// Display display = wm.getDefaultDisplay();
DisplayMetrics displaymetrics = new DisplayMetrics();
this.getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
float hight = displaymetrics.heightPixels ;
float width = displaymetrics.widthPixels ;
int convertHighet = (int) hight, convertWidth = (int) width;
// Resources mResources = getResources();
// Bitmap bitmap = BitmapFactory.decodeResource(mResources, R.drawable.screenshot);
PdfDocument document = new PdfDocument();
PdfDocument.PageInfo pageInfo = new PdfDocument.PageInfo.Builder(convertWidth, convertHighet, 1).create();
PdfDocument.Page page = document.startPage(pageInfo);
Canvas canvas = page.getCanvas();
Paint paint = new Paint();
canvas.drawPaint(paint);
bitmap = Bitmap.createScaledBitmap(bitmap, convertWidth, convertHighet, true);
paint.setColor(Color.BLUE);
canvas.drawBitmap(bitmap, 0, 0 , null);
document.finishPage(page);
// write the document content
String targetPdf = "/sdcard/pdffromScroll.pdf";
File filePath;
filePath = new File(targetPdf);
try {
document.writeTo(new FileOutputStream(filePath));
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(this, "Something wrong: " + e.toString(), Toast.LENGTH_LONG).show();
}
// close the document
document.close();
Toast.makeText(this, "PDF of Scroll is created!!!", Toast.LENGTH_SHORT).show();
openGeneratedPDF();
}
private void openGeneratedPDF(){
File file = new File("/sdcard/pdffromScroll.pdf");
if (file.exists())
{
Intent intent=new Intent(Intent.ACTION_VIEW);
Uri uri = Uri.fromFile(file);
intent.setDataAndType(uri, "application/pdf");
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
try
{
startActivity(intent);
}
catch(ActivityNotFoundException e)
{
Toast.makeText(ScrollActivity.this, "No Application available to view pdf", Toast.LENGTH_LONG).show();
}
}
}
}
I have used the similar method to create the pdf document and to open it.
So you can get reference from step 3 about this thing.
Download Source Code For Android generate pdf from view
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