Open PDF on Android via QDesktopServices::openUrl?

digorydoo

I'm working on a Qt app whose target may be Windows desktop or Android. The app largely relies on a web-service that provides data in PDF and other formats. To view a PDF, I first write the data as a local PDF file (QDir::tempPath), then I call QDesktopServices::openUrl to show the file. This works nicely on Windows. On Android, I get the following error in the device's log:

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D/Qt ( 5970): qrc:///PageDebugInfo.qml:551 (getReportCompleted): qml: getReportCompleted: url='file:////data/data/com.company.product/files/com.company.product.tmp.1409758061.pdf'
D/Instrumentation( 5970): checkStartActivityResult :Intent { act=android.intent.action.VIEW dat=file:////data/data/com.company.product/files/com.company.product.tmp.1409758061.pdf }
D/Instrumentation( 5970): checkStartActivityResult inent is instance of inent:
W/System.err( 5970): android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.VIEW dat=file:////data/data/com.company.product/files/com.company.product.tmp.1409758061.pdf }
W/System.err( 5970): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1659)
W/System.err( 5970): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1434)
W/System.err( 5970): at android.app.Activity.startActivityForResult(Activity.java:3430)
W/System.err( 5970): at android.app.Activity.startActivityForResult(Activity.java:3391)
W/System.err( 5970): at android.app.Activity.startActivity(Activity.java:3626)
W/System.err( 5970): at android.app.Activity.startActivity(Activity.java:3594)
W/System.err( 5970): at org.qtproject.qt5.android.QtNative.openURL(QtNative.java:116)
W/System.err( 5970): at dalvik.system.NativeStart.run(Native Method)
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I presume the reason is that I need to declare something in my Android manifest. I studied http://developer.android.com/guide/components/intents-filters.html but I do not seem to be able to figure it out.

I basically want to show the PDF in the device's default viewer. If there is more than one, the usual dialog to choose a viewer should be shown.

Gianluca

Take into account that external activity on Android (even the Android provided activities) cannot read temp files saved in data/data/com.company.product/
So, maybe the error come out because Android cannot read the file.

You should write the pdf in an external public directory, like the directory returned by getExternalDir of Android API.

digorydoo

Thanks for the reply. I'm now using QStandardPaths::writableLocation (QStandardPaths::DownloadLocation) instead of QDir::tempPath. The path is now:

file:////storage/emulated/0/Download/com.company.product.tmp.1409818898.pdf

The error is similar:

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checkStartActivityResult :Intent { act=android.intent.action.VIEW dat=file:////storage/emulated/0/Download/com.company.product.tmp.1409818898.pdf }
D/Instrumentation(21732): checkStartActivityResult inent is instance of inent:
W/System.err(21732): android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.VIEW dat=file:////storage/emulated/0/Download/com.company.product.tmp.1409818898.pdf }
D/dalvikvm(21732): Rejecting registerization due to +iget-object-quick v7, v9, (#8)
[call stack follows]
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digorydoo

Still not working...

I removed the extra slash in file:////.
I checked that the pdf file is correctly written in the Download folder and is a valid PDF; it can be opened manually by clicking on it in the Android app "My Files".