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jfversluis / pdfjs

A sample for showing PDF files in a Xamarin.Forms application with pdf.js
https://blog.verslu.is/xamarin/xamarin-forms-xamarin/showing-pdf-files-xamarin-forms/
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Blank data is coming in PDFViewer in android #8

Open shivanimangla13 opened 3 years ago

shivanimangla13 commented 3 years ago

Hello I have implemented the step by step procedure asked. But getting blank data.

image

jfversluis commented 3 years ago

Make sure the PDF file is found and/or publicly accessible. Check your application output if there is any errors or warnings in there :)

shivanimangla13 commented 3 years ago

Hello @jfversluis PDF is accessible and contains data also.

Getting this in Application output:

06-10 13:39:26.600 I/chromium( 3027): [INFO:CONSOLE(2205)] "Uncaught SyntaxError: Unexpected token .", source: file:///android_asset/pdfjs/build/pdf.js (2205) 06-10 13:39:26.600 I/chromium( 3027): [INFO:CONSOLE(244)] "Uncaught SyntaxError: Unexpected token ?", source: file:///android_asset/pdfjs/web/viewer.js (244)

jfversluis commented 3 years ago

Getting this in Application output:

That seems like the PDF is not loaded correctly for some reason, so find out where that is coming from and it should show up :)

shivanimangla13 commented 3 years ago

Below is the file url:

file:///android_asset/pdfjs/web/viewer.html?file=file:///%2Fstorage%2Femulated%2F0%2Fpdfjs%2F2a523182-4701-48c8-8280-c2cfa1cf7ad9.pdf

It is working fine if I add pdf file in assets but from external storage it is not showing any data @jfversluis

jfversluis commented 3 years ago

I don't think there is much I can do for you here. The script gives errors about not recognizing a dot and a question mark. Either look at the JavaScript source to get the details on what might go wrong or see if people with the pfdjs library have similar problems

KMWenyon commented 2 years ago

Did you ever find the issue with this?

amandaliya commented 2 years ago

@jfversluis : Thank you for this sample. I implemented this in Xamarin.Android project to view pdf received from api as bytearray, I stored it as local file and then load it into a webview by this sample.

The issue is same as @shivanimangla13 is getting, "No content". However, this is only an issue in Android Emulator. It works good in real android device. I tried to search a lot to fix this error but nothing helped me in this.

Exception I get in js file: Uncaught SyntaxError: Unexpected token '='", source: file:///android_asset/build/pdf.js (1832) Uncaught SyntaxError: Unexpected token '='", source: file:///android_asset/web/viewer.js (1560)

So, it throws where ever it first finds ||= "Logical OR assignment" in js files.

The logs says:

[chromium] [ERROR:filesystem_posix.cc(62)] mkdir /data/user/0/com.companyname.pdfviewer/cache/WebView/Crashpad: No such file or directory (2)
[FloatingActionButton] Setting a custom background is not supported.
[yname.pdfviewe] Accessing hidden method Landroid/media/AudioManager;->getOutputLatency(I)I (greylist, reflection, allowed)
[HostConnection] HostConnection::get() New Host Connection established 0xec065cb0, tid 4687
[HostConnection] HostComposition ext ANDROID_EMU_CHECKSUM_HELPER_v1 ANDROID_EMU_native_sync_v2 ANDROID_EMU_native_sync_v3 ANDROID_EMU_native_sync_v4 ANDROID_EMU_dma_v1 ANDROID_EMU_direct_mem ANDROID_EMU_host_composition_v1 ANDROID_EMU_host_composition_v2 ANDROID_EMU_YUV_Cache ANDROID_EMU_async_unmap_buffer GL_OES_vertex_array_object GL_KHR_texture_compression_astc_ldr ANDROID_EMU_gles_max_version_2 
[cr_media] Requires BLUETOOTH permission
[chromium] [ERROR:gl_surface_egl.cc(549)] eglChooseConfig failed with error EGL_SUCCESS
[EGL_emulation] eglCreateContext: 0xec064a50: maj 2 min 0 rcv 2
[EGL_emulation] eglMakeCurrent: 0xec064a50: ver 2 0 (tinfo 0xdd719030) (first time)
[chromium] [ERROR:gl_surface_egl.cc(549)] eglChooseConfig failed with error EGL_SUCCESS
[VideoCapabilities] Unsupported profile 4 for video/mp4v-es
[cr_MediaCodecUtil] HW encoder for video/avc is not available on this device.
[EGL_emulation] eglCreateContext: 0xec063780: maj 2 min 0 rcv 2
[Choreographer] Skipped 107 frames!  The application may be doing too much work on its main thread.
[HostConnection] HostConnection::get() New Host Connection established 0xec065150, tid 4527
[HostConnection] HostComposition ext ANDROID_EMU_CHECKSUM_HELPER_v1 ANDROID_EMU_native_sync_v2 ANDROID_EMU_native_sync_v3 ANDROID_EMU_native_sync_v4 ANDROID_EMU_dma_v1 ANDROID_EMU_direct_mem ANDROID_EMU_host_composition_v1 ANDROID_EMU_host_composition_v2 ANDROID_EMU_YUV_Cache ANDROID_EMU_async_unmap_buffer GL_OES_vertex_array_object GL_KHR_texture_compression_astc_ldr ANDROID_EMU_gles_max_version_2 
[OpenGLRenderer] Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...
[EGL_emulation] eglMakeCurrent: 0xec068db0: ver 2 0 (tinfo 0xdd73de50) (first time)
[Gralloc4] mapper 4.x is not supported
[HostConnection] createUnique: call
[HostConnection] HostConnection::get() New Host Connection established 0xec068560, tid 4527
[goldfish-address-space] allocate: Ask for block of size 0x100
[goldfish-address-space] allocate: ioctl allocate returned offset 0x3fd3d0000 size 0x2000
[ActivityMa03-18 15:07:39.621 I] Skipped 241 frames!  The application may be doing too much work on its main thread.
[chromium] [INFO:CONSOLE(1832)] "Uncaught SyntaxError: Unexpected token '='", source: file:///android_asset/build/pdf.js (1832)
[chromium] [INFO:CONSOLE(1560)] "Uncaught SyntaxError: Unexpected token '='", source: file:///android_asset/web/viewer.js (1560)
[monodroid-assembly] /data/app/~~TX4dzoS0Q8z9pAok-tf4dQ==/com.companyname.pdfviewer-sVD-efzBe36ZwBRMDPc9gA==/base.apk entry: res/03-18 15:07:41.860 I/OpenGLRenderer( 4356): Davey! duration=1532ms; Flags=0, IntendedVsync=462765790468, Vsync=463865790424, OldestInputEvent=9223372036854775807, NewestInputEvent=0, HandleInputStart=463867992300, AnimationStart=463868055200, PerformTraversalsStart=464023663900, DrawStart=464025348700, SyncQueued=464057309600, SyncStart=464058575300, IssueDrawCommandsStart=464058975600, SwapBuffers=464291995000, FrameCompleted=464299862300, DequeueBufferDuration=3270100, QueueBufferDuration=2597000, GpuCompleted=0, 
[yname.pdfviewe] Background young concurrent copying GC freed 10053(588KB) AllocSpace objects, 0(0B) LOS objects, 46% free, 2761KB/5160KB, paused 61.066ms total 2.080s

Would you please help me know why this is failing in Emulator only? Is there any configuration/setting for emulator which can fix this problem? Tried changing the GPU Mode from auto to Host - Didn't work. Tried adding - didn't work.

Thank you so much for your help.