如何在没有下载选项的情况下在 Android 中在线从 url 打开 pdf？

Question

In my app I want the user to read the pdf files inside my app without any option to download them. How can I do this? I am using the following code but not working-

WebView webView = (WebView) findViewById(R.id.webview);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setPluginsEnabled(true);
webView.loadUrl("https://docs.google.com/viewer?"+pdf_url);

Is there any other way to do this? If you can do it?

Answer 1

You can open pdf from URL online in Android without a download option.

Kotlin

val path="https://github.github.com/training-kit/downloads/github-git-cheat-sheet.pdf"
    
activityWebViewBinding.webview.settings.loadWithOverviewMode = true
activityWebViewBinding.webview.settings.javaScriptEnabled = true
val url = "https://docs.google.com/gview?embedded=true&url=$path"
activityWebViewBinding.webview.loadUrl(url)

Java

 String path="https://github.github.com/training-kit/downloads/github-git-cheat-sheet.pdf";
        
 webview.settings.setLoadWithOverviewMode(true);
 webview.settings.setJavaScriptEnabled(true);
 String url = "https://docs.google.com/gview?embedded=true&url="+path;
 webview.loadUrl(url);

Answer 2

You can simply launch intent as below

val pdfUrl = "ENTER_PDF_URL_HERE"
val intent: Intent = Intent(Intent.ACTION_VIEW, Uri.parse(pdfUrl))
    .addCategory(Intent.CATEGORY_BROWSABLE)
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
context.startActivity(intent)

This would simply open it up device's pdf viewer app which comes in almost all android devices com.google.android.apps.docs

You can also safeguard this code by querying packages beforehand and adding fallbacks