How to Open a PDF File from the Assets Folder in Android?

Read a PDF File from Assets Folder

Problem:
When reading a PDF file from the application's assets folder, an error message "The file path is not valid" is encountered after selecting an application to open the file.

Solution:

The issue lies in the file path to the PDF file. To rectify this, follow these steps:

1. Copy the PDF File to the Application's Files Directory

<code class="java">private void CopyReadAssets() {
    AssetManager assetManager = getAssets();

    InputStream in = null;
    OutputStream out = null;
    File file = new File(getFilesDir(), "abc.pdf");
    try {
        in = assetManager.open("abc.pdf");
        out = openFileOutput(file.getName(), Context.MODE_WORLD_READABLE);

        copyFile(in, out);
        in.close();
        in = null;
        out.flush();
        out.close();
        out = null;
    } catch (Exception e) {
        Log.e("tag", e.getMessage());
    }
}</code>

This code copies the "abc.pdf" file from the assets folder to the application's files directory, ensuring that you have access to the file.

2. Update the Intent to Use the New File Path

<code class="java">Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(
                    Uri.parse("file://" + getFilesDir() + "/abc.pdf"),
                    "application/pdf");</code>

This code updates the Intent to point to the copied PDF file in the application's files directory.

3. Add Permission to Write to External Storage

<code class="xml"><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /></code>

Add this permission to the AndroidManifest.xml file to grant the application permission to access external storage for file operations.

Now, the application should successfully read and display the PDF file when the user clicks the DOCS button.

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