Android NDK: LOCAL_MODULE definition in jni/Android.mk must not contain space

[rezaee]

I use Ubuntu 16.04 and tried to compile tesseract4, by ndk-build to use it inside Android Studio. But I get this result:

jni/Application.mk:6: /home/m/tesseract/android/jni/READONLY/google3/mobile/build/common.mk: No such file or directory
Traceback (most recent call last):
  File "/home/m/android-ndk-r16b/build/extract_manifest.py", line 106, in <module>
    main()
  File "/home/m/android-ndk-r16b/build/extract_manifest.py", line 96, in main
    tree = xml.etree.ElementTree.parse(args.manifest_file)
  File "/home/m/android-ndk-r16b/prebuilt/linux-x86_64/lib/python2.7/xml/etree/ElementTree.py", line 1182, in parse
    tree.parse(source, parser)
  File "/home/m/android-ndk-r16b/prebuilt/linux-x86_64/lib/python2.7/xml/etree/ElementTree.py", line 657, in parse
    self._root = parser.close()
  File "/home/m/android-ndk-r16b/prebuilt/linux-x86_64/lib/python2.7/xml/etree/ElementTree.py", line 1654, in close
    self._raiseerror(v)
  File "/home/m/android-ndk-r16b/prebuilt/linux-x86_64/lib/python2.7/xml/etree/ElementTree.py", line 1506, in _raiseerror
    raise err
xml.etree.ElementTree.ParseError: no element found: line 4, column 3
Android NDK: WARNING: APP_PLATFORM android-16 is higher than android:minSdkVersion 1 in ./AndroidManifest.xml. NDK binaries will *not* be comptible with devices older than android-16. See https://android.googlesource.com/platform/ndk/+/master/docs/user/common_problems.md for more information.    
Traceback (most recent call last):
  File "/home/m/android-ndk-r16b/build/extract_manifest.py", line 106, in <module>
    main()
  File "/home/m/android-ndk-r16b/build/extract_manifest.py", line 96, in main
    tree = xml.etree.ElementTree.parse(args.manifest_file)
  File "/home/m/android-ndk-r16b/prebuilt/linux-x86_64/lib/python2.7/xml/etree/ElementTree.py", line 1182, in parse
    tree.parse(source, parser)
  File "/home/m/android-ndk-r16b/prebuilt/linux-x86_64/lib/python2.7/xml/etree/ElementTree.py", line 657, in parse
    self._root = parser.close()
  File "/home/m/android-ndk-r16b/prebuilt/linux-x86_64/lib/python2.7/xml/etree/ElementTree.py", line 1654, in close
    self._raiseerror(v)
  File "/home/m/android-ndk-r16b/prebuilt/linux-x86_64/lib/python2.7/xml/etree/ElementTree.py", line 1506, in _raiseerror
    raise err
xml.etree.ElementTree.ParseError: no element found: line 4, column 3
local c includes= jni/../../api jni/../../ccmain jni/../../ccstruct jni/../../ccutil jni/../../classify jni/../../cutil jni/../../dict jni/../../image jni/../../textord jni/../../third_party jni/../../wordrec jni/../../opencl jni/../../viewer jni/../../../leptonica/include
local path=jni
local src files  = ../../api/baseapi.cpp ../../api/capi.cpp ../../api/renderer.cpp ../../ccmain/adaptions.cpp ../../ccmain/applybox.cpp ../../ccmain/control.cpp ../../ccmain/docqual.cpp ../../ccmain/equationdetect.cpp ../../ccmain/fixspace.cpp ../../ccmain/fixxht.cpp ../../ccmain/linerec.cpp ../../ccmain/ltrresultiterator.cpp ../../ccmain/osdetect.cpp ../../ccmain/output.cpp ../../ccmain/pageiterator.cpp ../../ccmain/pagesegmain.cpp ../../ccmain/pagewalk.cpp ../../ccmain/paragraphs.cpp ../../ccmain/paramsd.cpp ../../ccmain/par_control.cpp ../../ccmain/pgedit.cpp ../../ccmain/recogtraining.cpp ../../ccmain/reject.cpp ../../ccmain/resultiterator.cpp ../../ccmain/superscript.cpp ../../ccmain/tessbox.cpp ../../ccmain/tessedit.cpp ../../ccmain/tesseractclass.cpp ../../ccmain/tessvars.cpp ../../ccmain/tfacepp.cpp ../../ccmain/thresholder.cpp ../../ccmain/werdit.cpp ../../ccstruct/blamer.cpp ../../ccstruct/blobbox.cpp ../../ccstruct/blobs.cpp ../../ccstruct/blread.cpp ../../ccstruct/boxread.cpp ../../ccstruct/boxword.cpp ../../ccstruct/ccstruct.cpp ../../ccstruct/coutln.cpp ../../ccstruct/detlinefit.cpp ../../ccstruct/dppoint.cpp ../../ccstruct/fontinfo.cpp ../../ccstruct/genblob.cpp ../../ccstruct/imagedata.cpp ../../ccstruct/linlsq.cpp ../../ccstruct/matrix.cpp ../../ccstruct/mod128.cpp ../../ccstruct/normalis.cpp ../../ccstruct/ocrblock.cpp ../../ccstruct/ocrpara.cpp ../../ccstruct/ocrrow.cpp ../../ccstruct/otsuthr.cpp ../../ccstruct/pageres.cpp ../../ccstruct/params_training_featdef.cpp ../../ccstruct/pdblock.cpp ../../ccstruct/points.cpp ../../ccstruct/polyaprx.cpp ../../ccstruct/polyblk.cpp ../../ccstruct/publictypes.cpp ../../ccstruct/quadlsq.cpp ../../ccstruct/quspline.cpp ../../ccstruct/ratngs.cpp ../../ccstruct/rect.cpp ../../ccstruct/rejctmap.cpp ../../ccstruct/seam.cpp ../../ccstruct/split.cpp ../../ccstruct/statistc.cpp ../../ccstruct/stepblob.cpp ../../ccstruct/vecfuncs.cpp ../../ccstruct/werd.cpp ../../ccutil/ambigs.cpp ../../ccutil/basedir.cpp ../../ccutil/bits16.cpp ../../ccutil/bitvector.cpp ../../ccutil/ccutil.cpp ../../ccutil/clst.cpp ../../ccutil/elst2.cpp ../../ccutil/elst.cpp ../../ccutil/errcode.cpp ../../ccutil/globaloc.cpp ../../ccutil/indexmapbidi.cpp ../../ccutil/mainblk.cpp ../../ccutil/memry.cpp ../../ccutil/params.cpp ../../ccutil/scanutils.cpp ../../ccutil/serialis.cpp ../../ccutil/strngs.cpp ../../ccutil/tessdatamanager.cpp ../../ccutil/tprintf.cpp ../../ccutil/unicharcompress.cpp ../../ccutil/unichar.cpp ../../ccutil/unicharmap.cpp ../../ccutil/unicharset.cpp ../../ccutil/unicodes.cpp ../../ccutil/universalambigs.cpp ../../classify/adaptive.cpp ../../classify/adaptmatch.cpp ../../classify/blobclass.cpp ../../classify/classify.cpp ../../classify/cluster.cpp ../../classify/clusttool.cpp ../../classify/cutoffs.cpp ../../classify/errorcounter.cpp ../../classify/featdefs.cpp ../../classify/float2int.cpp ../../classify/fpoint.cpp ../../classify/intfeaturedist.cpp ../../classify/intfeaturemap.cpp ../../classify/intfeaturespace.cpp ../../classify/intfx.cpp ../../classify/intmatcher.cpp ../../classify/intproto.cpp ../../classify/kdtree.cpp ../../classify/mastertrainer.cpp ../../classify/mf.cpp ../../classify/mfdefs.cpp ../../classify/mfoutline.cpp ../../classify/mfx.cpp ../../classify/normfeat.cpp ../../classify/normmatch.cpp ../../classify/ocrfeatures.cpp ../../classify/outfeat.cpp ../../classify/picofeat.cpp ../../classify/protos.cpp ../../classify/sampleiterator.cpp ../../classify/shapeclassifier.cpp ../../classify/shapetable.cpp ../../classify/tessclassifier.cpp ../../classify/trainingsample.cpp ../../classify/trainingsampleset.cpp ../../cutil/bitvec.cpp ../../cutil/callcpp.cpp ../../cutil/cutil_class.cpp ../../cutil/cutil.cpp ../../cutil/danerror.cpp ../../cutil/efio.cpp ../../cutil/emalloc.cpp ../../cutil/oldlist.cpp ../../cutil/structures.cpp ../../dict/context.cpp ../../dict/dawg_cache.cpp ../../dict/dawg.cpp ../../dict/dict.cpp ../../dict/hyphen.cpp ../../dict/permdawg.cpp ../../dict/stopper.cpp ../../dict/trie.cpp ../../textord/alignedblob.cpp ../../textord/baselinedetect.cpp ../../textord/bbgrid.cpp ../../textord/blkocc.cpp ../../textord/blobgrid.cpp ../../textord/ccnontextdetect.cpp ../../textord/cjkpitch.cpp ../../textord/colfind.cpp ../../textord/colpartition.cpp ../../textord/colpartitiongrid.cpp ../../textord/colpartitionset.cpp ../../textord/devanagari_processing.cpp ../../textord/drawedg.cpp ../../textord/drawtord.cpp ../../textord/edgblob.cpp ../../textord/edgloop.cpp ../../textord/equationdetectbase.cpp ../../textord/fpchop.cpp ../../textord/gap_map.cpp ../../textord/imagefind.cpp ../../textord/linefind.cpp ../../textord/makerow.cpp ../../textord/oldbasel.cpp ../../textord/pithsync.cpp ../../textord/pitsync1.cpp ../../textord/scanedg.cpp ../../textord/sortflts.cpp ../../textord/strokewidth.cpp ../../textord/tabfind.cpp ../../textord/tablefind.cpp ../../textord/tablerecog.cpp ../../textord/tabvector.cpp ../../textord/textlineprojection.cpp ../../textord/textord.cpp ../../textord/topitch.cpp ../../textord/tordmain.cpp ../../textord/tospace.cpp ../../textord/tovars.cpp ../../textord/underlin.cpp ../../textord/wordseg.cpp ../../textord/workingpartset.cpp ../../viewer/scrollview.cpp ../../viewer/svmnode.cpp ../../viewer/svpaint.cpp ../../viewer/svutil.cpp ../../wordrec/associate.cpp ../../wordrec/chop.cpp ../../wordrec/chopper.cpp ../../wordrec/drawfx.cpp ../../wordrec/findseam.cpp ../../wordrec/gradechop.cpp ../../wordrec/language_model.cpp ../../wordrec/lm_consistency.cpp ../../wordrec/lm_pain_points.cpp ../../wordrec/lm_state.cpp ../../wordrec/outlines.cpp ../../wordrec/params_model.cpp ../../wordrec/pieces.cpp ../../wordrec/plotedges.cpp ../../wordrec/render.cpp ../../wordrec/segsearch.cpp ../../wordrec/tface.cpp ../../wordrec/wordclass.cpp ../../wordrec/wordrec.cpp
Android NDK: LOCAL_MODULE definition in jni/Android.mk must not contain space    
/home/m/android-ndk-r16b/build/core/build-shared-library.mk:23: *** Android NDK: Please correct error. Aborting    .  Stop.

``
How can I fix this?`

[wenfeifeifei]

I have the same problem。Did you solve this problem?
Thanks~

[duanju]

same error

[amitdo]

https://github.com/tesseract-ocr/tesseract/wiki/User-Projects-%E2%80%93-3rdParty#mobile

[JamesZhang-Nauto]

Does anybody know what READONLY/google3/mobile/build/common.mk is? It looks like it needs to be downloaded from somewhere else?

[zdenop]

@duanju , @rezaee : can you provide information how did you tried make android build?
There are other experiences that it is possible to compile tesseract for android.

@Jingzhe88 : I believe READONLY/google3/mobile/build/common.mk is some internal google file, not needed for tesseract build.

[alexcohn]

I have fixed this in my fork, which uses Tesseract 4.0. The executable is built with CMake in Android Studio (or on command line). Here is my Windows command for arm64-v8a:

cmake -HD:\git\Tesseract4Android\tesseract4android\src\main\cpp
-BD:\git\Tesseract4Android\tesseract4android\.externalNativeBuild\cmake\debug\arm64-v8a
-DANDROID_ABI=arm64-v8a
-DANDROID_PLATFORM=android-16
-DCMAKE_LIBRARY_OUTPUT_DIRECTORY=D:\git\Tesseract4Android\tesseract4android\build\intermediates\cmake\debug\obj\arm64-v8a
-DCMAKE_BUILD_TYPE=Debug
-DANDROID_NDK=C:\local\Android\sdk\ndk-bundle
-DCMAKE_CXX_FLAGS=
-DCMAKE_TOOLCHAIN_FILE=C:\local\Android\sdk\ndk-bundle\build\cmake\android.toolchain.cmake
-DCMAKE_MAKE_PROGRAM=C:\local\Android\sdk\cmake\3.6.4111459\bin\ninja.exe
-GAndroid Gradle - Ninja

[stweil]

Is there anything which needs to be fixed in the Tesseract code base? If not, I suggest to close this issue.

Of course all relevant information how to build for Android can be added to the Tesseract Wiki.

[alexcohn]

Is there anything which needs to be fixed in the Tesseract code base? If not, I suggest to close this issue.

I would say, yes, there is. The android directory with all its files can (should) be deleted.

Of course all relevant information how to build for Android can be added to the Tesseract Wiki.

Should I add this info to Wiki?

[stweil]

Should I add this info to Wiki?

Yes, please. I suggest to add a new page for Android and refer to it from https://github.com/tesseract-ocr/tesseract/wiki/Compiling.

[alexcohn]

Will do, probably next week.

[alexcohn]

Actually, build for Android is so easy, it can be a short section in Compilation guide for various platforms.

Done.

[stweil]

It looks like the tess-two project is still based on Tesseract 3.05, or am I wrong? Is there support for the latest Tesseract (4.1 or newer), too?

[alexcohn]

@stweil see https://github.com/alexcohn/tess-two/tree/4.1. Here is what it says on my device:

./tesseract --version
tesseract 4.1.0
 leptonica-1.79.0
  libjpeg 9b : libpng 1.6.25 : zlib 1.2.8

The eurotext.png is OCRed correctly, but there are still some glitches:

• Error in pixReadMemTiff: function not present
• Error in pixReadMem: tiff: no pix returned
• Error in pixaGenerateFontFromString: pix not made
• Error in bmfCreate: font pixa not made
• Warning: Parameter not found: enable_new_segsearch

I will look into these in the next days, as well as running the Java tests.

[zdenop]

1. This has nothing to do with original reported issue.
2. Search for answer - it was discussed many times.

[alexcohn]

@zdenop I posted these 5 glitches not to hijack this thread for unrelated build issues, but as a "progresses report" for @stweil, to show that my tess-two fork is close to completing 4.1 support for Android.

[stweil]

Thank you, @alexcohn, for the information on the 4.1 branch of tess-two. The README in that branch still refers to Tesseract 3.05, so it needs an update, too.

[alexcohn]

That's what happens when you push work in progress ;)

[alexcohn]

Thank you, @alexcohn, for the information on the 4.1 branch of tess-two. The README in that branch still refers to Tesseract 3.05, so it needs an update, too.

Fixed.

[zdenop]

Closing as Android.mk does not exists in current code anymore.