Can't open a local PDF in webview using file://

问题

I need to display a PDF file located in my app dir in a webwiev without using Google Docs.

This is my code for the webview:

public void OpenPDF() {
WebView webview = new WebView(this); 
    setContentView(webview);
    webview.getSettings().setJavaScriptEnabled(true); 
    webview.loadUrl("file://mnt/data/data/com.example.android/files/Docs/test.pdf");;
}

I get a blank webview instead of below code works

public void OpenPDF() {
WebView webview = new WebView(this); 
    setContentView(webview);
    webview.getSettings().setJavaScriptEnabled(true); 
    webview.loadUrl("file://mnt/data/data/com.example.android/files/Docs/test.html");  
}

I tested directly in my web browser with file://mnt/data/data/com.example.android/files/Docs/test.pdf and test.html and it worked for both. I installed a PDF reader.

07-25 17:09:07.967: W/webcore(11347): java.lang.Throwable: EventHub.removeMessages(int what = 107) is not supported before the WebViewCore is set up.
07-25 17:09:07.967: W/webcore(11347):   at android.webkit.WebViewCore$EventHub.removeMessages(WebViewCore.java:1683)
07-25 17:09:07.967: W/webcore(11347):   at android.webkit.WebViewCore$EventHub.access$7900(WebViewCore.java:926)
07-25 17:09:07.967: W/webcore(11347):   at android.webkit.WebViewCore.removeMessages(WebViewCore.java:1795)
07-25 17:09:07.967: W/webcore(11347):   at android.webkit.WebView.sendOurVisibleRect(WebView.java:2917)
07-25 17:09:07.967: W/webcore(11347):   at android.webkit.ZoomManager.setZoomScale(ZoomManager.java:593)
07-25 17:09:07.967: W/webcore(11347):   at android.webkit.ZoomManager.access$1700(ZoomManager.java:49)
07-25 17:09:07.967: W/webcore(11347):   at android.webkit.ZoomManager$PostScale.run(ZoomManager.java:984)
07-25 17:09:07.967: W/webcore(11347):   at android.os.Handler.handleCallback(Handler.java:605)
07-25 17:09:07.967: W/webcore(11347):   at android.os.Handler.dispatchMessage(Handler.java:92)
07-25 17:09:07.967: W/webcore(11347):   at android.os.Looper.loop(Looper.java:137)
07-25 17:09:07.967: W/webcore(11347):   at android.app.ActivityThread.main(ActivityThread.java:4424)
07-25 17:09:07.967: W/webcore(11347):   at java.lang.reflect.Method.invokeNative(Native Method)
07-25 17:09:07.967: W/webcore(11347):   at java.lang.reflect.Method.invoke(Method.java:511)
07-25 17:09:07.967: W/webcore(11347):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
07-25 17:09:07.967: W/webcore(11347):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
07-25 17:09:07.967: W/webcore(11347):   at dalvik.system.NativeStart.main(Native Method)

Any ideas about why only pdf files won't open ?

回答1:

Their seems to be an answer to your question already in stack overflow at Open Local Html File in Webview - Android

to sum it up : Usage of file:/// before your actual path should solve your problem for everything except .pdf files

Webview does not support PDF in android :(. You need to use google doc according to different sources.

回答2:

I think you should try with 3 slashes, like that:

webview.loadUrl("file:///mnt/data/data/com.example.android/files/Docs/test.pdf");

来源：https://stackoverflow.com/questions/17861147/cant-open-a-local-pdf-in-webview-using-file

标签

android

android-webview