How to open local PDF file in WebView in Android?
To open local PDF files in Android's WebView, you can follow these steps:1. Add PermissionsFirst, add the following permissions in the file to allow your app to access the device's storage space:2. Configure WebViewNext, configure your WebView in your Activity or Fragment. Ensure JavaScript is enabled in WebView, as some PDF viewers (such as Google Docs) require JavaScript support.3. Load PDF FilesThere are several methods to load PDF files in WebView. A common approach is to use Google Docs Viewer as an intermediary to display the PDF. Convert the PDF file's path into a URL-encoded URI and load it via the Google Docs Viewer URL.Example code:Assume your PDF file is stored in the folder of local storage with the filename :4. Handle File PathsNote that hardcoding paths (e.g., ) is not recommended for real devices, as paths may vary across different models. Instead, use to obtain the root path of external storage.5. Security ConsiderationsWhen your app accesses external storage, address all security concerns, including user privacy and data protection. Starting from Android 6.0 (API level 23), users must grant permissions at runtime, so dynamically request permissions in your code.SummaryBy following these steps, you can successfully load and display local PDF files in Android's WebView. Using Google Docs Viewer is a convenient method as it avoids the complexity of directly handling PDF rendering within WebView. However, consider whether a more suitable method or third-party library might better meet your application's needs for efficient and secure file handling.