IOException: not create document. Error

When I prepare the example "Display PDF in assets folder (inside APK)", I face with the error of "java.io.IOException: not create document. Error". It should be generated by the code:

pdfRenderer = new PdfRenderer(fileDescriptor);

Somebody commented it's caused by new version of Gradle (ref: https://github.com/googlesamples/android-PdfRendererBasic/issues/1), so I edit dependencies of buildscript in build.gradle (Project: ...), use gradle:2.1.2 to solve this problem.

Display PDF in assets folder (inside APK)

The example "Display PDF using PdfRenderer" show how to display PDF stored in sdcard, this example show how to display PDF stored in assets inside APK.

First, you have to create assets folder and copy your PDF into it.


Then you have to edit aaptOptions in build.gradle (Module: app), not to compass "pdf" file.

    aaptOptions {
        noCompress "pdf"
    }

Layout file, refer to the example "Create PDF using PdfDocument".

MainActivity.java

package com.blogspot.android_er.androidpdf;

import android.content.res.AssetFileDescriptor;
import android.content.res.AssetManager;
import android.graphics.Bitmap;
import android.graphics.pdf.PdfRenderer;
import android.os.Bundle;
import android.os.ParcelFileDescriptor;
import android.support.v7.app.AppCompatActivity;
import android.widget.ImageView;
import android.widget.Toast;

import java.io.IOException;

public class MainActivity extends AppCompatActivity {

    ImageView pdfView;

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

        pdfView = (ImageView)findViewById(R.id.pdfview);

        try {
            openPDF();
        } catch (IOException e) {
            e.printStackTrace();
            Toast.makeText(this,
                    "Something Wrong: " + e.toString(),
                    Toast.LENGTH_LONG).show();
        }
    }

    private void openPDF() throws IOException {

        //open file in assets

        AssetManager assetManager = getAssets();
        AssetFileDescriptor assetFileDescriptor = 
                assetManager.openFd("test.pdf");
        ParcelFileDescriptor fileDescriptor = 
                assetFileDescriptor.getParcelFileDescriptor();

        //open file from sdcard
        /*
        String targetPdf = "/sdcard/test.pdf";
        File file = new File(targetPdf);

        ParcelFileDescriptor fileDescriptor = null;
        fileDescriptor = ParcelFileDescriptor.open(
                file, ParcelFileDescriptor.MODE_READ_ONLY);
        */

        //min. API Level 21
        PdfRenderer pdfRenderer = null;
        pdfRenderer = new PdfRenderer(fileDescriptor);

        final int pageCount = pdfRenderer.getPageCount();
        Toast.makeText(this,
                "pageCount = " + pageCount,
                Toast.LENGTH_LONG).show();

        //Display page 0
        PdfRenderer.Page rendererPage = pdfRenderer.openPage(1);
        int rendererPageWidth = rendererPage.getWidth();
        int rendererPageHeight = rendererPage.getHeight();
        Bitmap bitmap = Bitmap.createBitmap(
                rendererPageWidth,
                rendererPageHeight,
                Bitmap.Config.ARGB_8888);
        rendererPage.render(bitmap, null, null,
                PdfRenderer.Page.RENDER_MODE_FOR_DISPLAY);

        pdfView.setImageBitmap(bitmap);
        rendererPage.close();

        pdfRenderer.close();

        assetFileDescriptor.close();
    }
}

Remark: If you reported with the error "java.io.IOException: not create document. Error:", read next post.

Display PDF using PdfRenderer

The class android.graphics.pdf.PdfRenderer enables rendering a PDF document. This example show how to:


MainActivity.java

package com.blogspot.android_er.androidpdf;

import android.graphics.Bitmap;
import android.graphics.pdf.PdfRenderer;
import android.os.Bundle;
import android.os.ParcelFileDescriptor;
import android.support.v7.app.AppCompatActivity;
import android.widget.ImageView;
import android.widget.Toast;

import java.io.File;
import java.io.IOException;

public class MainActivity extends AppCompatActivity {

    String targetPdf = "/sdcard/MagPi54.pdf";

    ImageView pdfView;

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

        pdfView = (ImageView)findViewById(R.id.pdfview);

        try {
            openPDF();
        } catch (IOException e) {
            e.printStackTrace();
            Toast.makeText(this,
                    "Something Wrong: " + e.toString(),
                    Toast.LENGTH_LONG).show();
        }
    }

    private void openPDF() throws IOException {
        File file = new File(targetPdf);

        ParcelFileDescriptor fileDescriptor = null;
        fileDescriptor = ParcelFileDescriptor.open(
                file, ParcelFileDescriptor.MODE_READ_ONLY);

        //min. API Level 21
        PdfRenderer pdfRenderer = null;
        pdfRenderer = new PdfRenderer(fileDescriptor);

        final int pageCount = pdfRenderer.getPageCount();
        Toast.makeText(this,
                "pageCount = " + pageCount,
                Toast.LENGTH_LONG).show();

        //Display page 0
        PdfRenderer.Page rendererPage = pdfRenderer.openPage(0);
        int rendererPageWidth = rendererPage.getWidth();
        int rendererPageHeight = rendererPage.getHeight();
        Bitmap bitmap = Bitmap.createBitmap(
                rendererPageWidth,
                rendererPageHeight,
                Bitmap.Config.ARGB_8888);
        rendererPage.render(bitmap, null, null,
                PdfRenderer.Page.RENDER_MODE_FOR_DISPLAY);

        pdfView.setImageBitmap(bitmap);
        rendererPage.close();

        pdfRenderer.close();
        fileDescriptor.close();
    }
}

layout/activity_main.xml, add a ImageView to display the PDF:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    tools:context="com.blogspot.android_er.androidpdf.MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="20dp"
        android:layout_gravity="center_horizontal"
        android:autoLink="web"
        android:text="http://android-er.blogspot.com/"
        android:textStyle="bold"/>

    <ImageView
        android:id="@+id/pdfview"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</LinearLayout>

uses-permission of "android.permission.READ_EXTERNAL_STORAGE" is needed in AndroidManifest.xml to read file from sdcard.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.blogspot.android_er.androidpdf">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

</manifest>

Next:
- Display PDF in assets folder (inside APK)

Related:
- Create PDF using PdfDocument