如何在android中修复tesseract的UnsatisfiedLinkError
[英]How to fix UnsatisfiedLinkError for tesseract in android
问题描述
i am trying to use "tesseract" for android i am using following libraries
我正在尝试为 android 使用“tesseract”我正在使用以下库
compile 'org.bytedeco.javacpp-presets:tesseract:3.04.01-1.3' compile 'org.bytedeco:javacpp:1.3.2'
i have the train data in assets.我有资产中的火车数据。
my source code if the main activity is following:如果主要活动如下，我的源代码：
package mr.t.mister.mr;
import android.app.Activity;
import android.content.Intent;
import android.content.res.AssetManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.media.ExifInterface;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import org.bytedeco.javacpp.lept.PIX;
import org.bytedeco.javacpp.tesseract.TessBaseAPI;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import static org.bytedeco.javacpp.lept.pixRead;
//import com.googlecode.tesseract.android.TessBaseAPI;
public class SimpleAndroidOCRActivity extends Activity {
public static final String PACKAGE_NAME = "com.datumdroid.android.ocr.simple";
public static final String DATA_PATH = Environment
.getExternalStorageDirectory().toString() + "/SimpleAndroidOCR/";
// You should have the trained data file in assets folder
// You can get them at:
// https://github.com/tesseract-ocr/tessdata
public static final String lang = "eng";
private static final String TAG = "SimpleAndroidOCR.java";
protected Button _button;
// protected ImageView _image;
protected EditText _field;
protected String _path;
protected boolean _taken;
protected static final String PHOTO_TAKEN = "photo_taken";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
String[] paths = new String[] { DATA_PATH, DATA_PATH + "tessdata/" };
for (String path : paths) {
File dir = new File(path);
if (!dir.exists()) {
if (!dir.mkdirs()) {
Log.v(TAG, "ERROR: Creation of directory " + path + " on sdcard failed");
return;
} else {
Log.v(TAG, "Created directory " + path + " on sdcard");
}
}
}
// lang.traineddata file with the app (in assets folder)
// You can get them at:
// http://code.google.com/p/tesseract-ocr/downloads/list
// This area needs work and optimization
if (!(new File(DATA_PATH + "tessdata/" + lang + ".traineddata")).exists()) {
try {
AssetManager assetManager = getAssets();
InputStream in = assetManager.open("tessdata/" + lang + ".traineddata");
//GZIPInputStream gin = new GZIPInputStream(in);
OutputStream out = new FileOutputStream(DATA_PATH
+ "tessdata/" + lang + ".traineddata");
// Transfer bytes from in to out
byte[] buf = new byte[1024];
int len;
//while ((lenf = gin.read(buff)) > 0) {
while ((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
}
in.close();
//gin.close();
out.close();
Log.v(TAG, "Copied " + lang + " traineddata");
} catch (IOException e) {
Log.e(TAG, "Was unable to copy " + lang + " traineddata " + e.toString());
}
}
// _image = (ImageView) findViewById(R.id.image);
_field = (EditText) findViewById(R.id.field);
_button = (Button) findViewById(R.id.button);
_button.setOnClickListener(new ButtonClickHandler());
_path = DATA_PATH + "/ocr.jpg";
}
public class ButtonClickHandler implements View.OnClickListener {
public void onClick(View view) {
Log.v(TAG, "Starting Camera app");
startCameraActivity();
}
}
// Simple android photo capture:
// http://labs.makemachine.net/2010/03/simple-android-photo-capture/
protected void startCameraActivity() {
File file = new File(_path);
Uri outputFileUri = Uri.fromFile(file);
final Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
startActivityForResult(intent, 0);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
Log.i(TAG, "resultCode: " + resultCode);
if (resultCode == -1) {
onPhotoTaken();
} else {
Log.v(TAG, "User cancelled");
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
outState.putBoolean(SimpleAndroidOCRActivity.PHOTO_TAKEN, _taken);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
Log.i(TAG, "onRestoreInstanceState()");
if (savedInstanceState.getBoolean(SimpleAndroidOCRActivity.PHOTO_TAKEN)) {
onPhotoTaken();
}
}
protected void onPhotoTaken() {
_taken = true;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 4;
Bitmap bitmap = BitmapFactory.decodeFile(_path, options);
try {
ExifInterface exif = new ExifInterface(_path);
int exifOrientation = exif.getAttributeInt(
ExifInterface.TAG_ORIENTATION,
ExifInterface.ORIENTATION_NORMAL);
Log.v(TAG, "Orient: " + exifOrientation);
int rotate = 0;
switch (exifOrientation) {
case ExifInterface.ORIENTATION_ROTATE_90:
rotate = 90;
break;
case ExifInterface.ORIENTATION_ROTATE_180:
rotate = 180;
break;
case ExifInterface.ORIENTATION_ROTATE_270:
rotate = 270;
break;
}
Log.v(TAG, "Rotation: " + rotate);
if (rotate != 0) {
// Getting width & height of the given image.
int w = bitmap.getWidth();
int h = bitmap.getHeight();
// Setting pre rotate
Matrix mtx = new Matrix();
mtx.preRotate(rotate);
// Rotating Bitmap
bitmap = Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, false);
}
// Convert to ARGB_8888, required by tess
bitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true);
} catch (IOException e) {
Log.e(TAG, "Couldn't correct orientation: " + e.toString());
}
// _image.setImageBitmap( bitmap );
Log.v(TAG, "Before baseApi");
TessBaseAPI baseApi = new TessBaseAPI();
//baseApi.setDebug(true);
//baseApi.Init()
baseApi.Init(DATA_PATH, lang);
PIX image = pixRead(_path);
//PIX image = pixRead(args.length > 0 ? args[0] : "/usr/src/tesseract/testing/phototest.tif");
baseApi.SetImage(image);
String recognizedText = baseApi.GetUTF8Text().getString(); //baseApi.getUTF8Text();
baseApi.End();
// You now have the text in recognizedText var, you can do anything with it.
// We will display a stripped out trimmed alpha-numeric version of it (if lang is eng)
// so that garbage doesn't make it to the display.
Log.v(TAG, "OCRED TEXT: " + recognizedText);
if ( lang.equalsIgnoreCase("eng") ) {
recognizedText = recognizedText.replaceAll("[^a-zA-Z0-9]+", " ");
}
recognizedText = recognizedText.trim();
if ( recognizedText.length() != 0 ) {
_field.setText(_field.getText().toString().length() == 0 ? recognizedText : _field.getText() + " " + recognizedText);
_field.setSelection(_field.getText().toString().length());
}
// Cycle done.
}
// www.Gaut.am was here
// Thanks for reading!
}
when i try to start tesseract, App crashes.当我尝试启动 tesseract 时，应用程序崩溃。 i get following things:我得到以下内容：
05-09 20:18:09.187 26906-26906/mr.t.mister.mr E/AndroidRuntime: FATAL EXCEPTION: main
Process: mr.t.mister.mr, PID: 26906
java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/mr.t.mister.mr-2/base.apk", zip file "/data/app/mr.t.mister.mr-2/split_lib_dependencies_apk.apk", zip file "/data/app/mr.t.mister.mr-2/split_lib_slice_0_apk.apk", zip file "/data/app/mr.t.mister.mr-2/split_lib_slice_1_apk.apk", zip file "/data/app/mr.t.mister.mr-2/split_lib_slice_2_apk.apk", zip file "/data/app/mr.t.mister.mr-2/split_lib_slice_3_apk.apk", zip file "/data/app/mr.t.mister.mr-2/split_lib_slice_4_apk.apk", zip file "/data/app/mr.t.mister.mr-2/split_lib_slice_5_apk.apk", zip file "/data/app/mr.t.mister.mr-2/split_lib_slice_6_apk.apk", zip file "/data/app/mr.t.mister.mr-2/split_lib_slice_7_apk.apk", zip file "/data/app/mr.t.mister.mr-2/split_lib_slice_8_apk.apk", zip file "/data/app/mr.t.mister.mr-2/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]] couldn't find "libjnilept.so"
at java.lang.Runtime.loadLibrary(Runtime.java:366)
at java.lang.System.loadLibrary(System.java:988)
at org.bytedeco.javacpp.Loader.loadLibrary(Loader.java:963)
at org.bytedeco.javacpp.Loader.load(Loader.java:764)
at org.bytedeco.javacpp.Loader.load(Loader.java:671)
at org.bytedeco.javacpp.lept.<clinit>(lept.java:10)
at java.lang.Class.classForName(Native Method)
at java.lang.Class.forName(Class.java:309)
at org.bytedeco.javacpp.Loader.load(Loader.java:726)
at org.bytedeco.javacpp.Loader.load(Loader.java:671)
at org.bytedeco.javacpp.tesseract$TessBaseAPI.<clinit>(tesseract.java:3648)
at mr.t.mister.mr.SimpleAndroidOCRActivity.onPhotoTaken(SimpleAndroidOCRActivity.java:214)
at mr.t.mister.mr.SimpleAndroidOCRActivity.onActivityResult(SimpleAndroidOCRActivity.java:138)
at android.app.Activity.dispatchActivityResult(Activity.java:6192)
at android.app.ActivityThread.deliverResults(ActivityThread.java:3570)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3617)
at android.app.ActivityThread.access$1300(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1352)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/mr.t.mister.mr-2/base.apk", zip file "/data/app/mr.t.mister.mr-2/split_lib_dependencies_apk.apk", zip file "/data/app/mr.t.mister.mr-2/split_lib_slice_0_apk.apk", zip file "/data/app/mr.t.mister.mr-2/split_lib_slice_1_apk.apk", zip file "/data/app/mr.t.mister.mr-2/split_lib_slice_2_apk.apk", zip file "/data/app/mr.t.mister.mr-2/split_lib_slice_3_apk.apk", zip file "/data/app/mr.t.mister.mr-2/split_lib_slice_4_apk.apk", zip file "/data/app/mr.t.mister.mr-2/split_lib_slice_5_apk.apk", zip file "/data/app/mr.t.mister.mr-2/split_lib_slice_6_apk.apk", zip file "/data/app/mr.t.mister.mr-2/split_lib_slice_7_apk.apk", zip file "/data/app/mr.t.mister.mr-2/split_lib_slice_8_apk.apk", zip file "/data/app/mr.t.mister.mr-2/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]] couldn't find "liblept.so"
at java.lang.Runtime.loadLibrary(Runtime.java:366)
at java.lang.System.loadLibrary(System.java:988)
at org.bytedeco.javacpp.Loader.loadLibrary(Loader.java:963)
at org.bytedeco.javacpp.Loader.load(Loader.java:752)
at org.bytedeco.javacpp.Loader.load(Loader.java:671)
at org.bytedeco.javacpp.lept.<clinit>(lept.java:10)
at java.lang.Class.classForName(Native Method)
at java.lang.Class.forName(Class.java:309)
at org.bytedeco.javacpp.Loader.load(Loader.java:726)
at org.bytedeco.javacpp.Loader.load(Loader.java:671)
at org.bytedeco.javacpp.tesseract$TessBaseAPI.<clinit>(tesseract.java:3648)
at mr.t.mister.mr.SimpleAndroidOCRActivity.onPhotoTaken(SimpleAndroidOCRActivity.java:214)
at mr.t.mister.mr.SimpleAndroidOCRActivity.onActivityResult(SimpleAndroidOCRActivity.java:138)
at android.app.Activity.dispatchActivityResult(Activity.java:6192)
at android.app.ActivityThread.deliverResults(ActivityThread.java:3570)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3617)
at android.app.ActivityThread.access$1300(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1352)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
05-09 20:18:09.282 26906-26919/mr.t.mister.mr I/art: Background partial concurrent mark sweep GC freed 798(72KB) AllocSpace objects, 2(91KB) LOS objects, 41% free, 1438KB/2MB, paused 14.815ms total 39.575ms
2 个解决方案
解决方案1
0 2017-05-09 15:35:55
Unsatisfied link error is produced when Android is not able to obtain a .so library.当 Android 无法获取 .so 库时，会产生 Unsatisfied link 错误。
Make sure that all your .so are under in their corresponding folder.确保您所有的 .so 都在其相应的文件夹下。 One or several of the followings -> https://developer.android.com/ndk/guides/abis.html?hl=es以下一项或多项 -> https://developer.android.com/ndk/guides/abis.html?hl=es
src
---main
------java
---------jnilibs
------------armeabi
------------arm64-v8a
------------...
It is possible you experiment the problem also if your device's processor does not match one of the abi you defined.如果您的设备的处理器与您定义的 abi 之一不匹配，您也可能会尝试该问题。
You can force your app to use a defined set of abis modifying build.gradle您可以强制您的应用程序使用一组定义的 abis 修改 build.gradle
defaultConfig {
....
ndk.abiFilters 'armeabi', 'arm64-v8a'
}
解决方案2
0 2021-02-13 04:40:23
I was having same issue.我有同样的问题。 When I included all the dependencies as below using *, it vanished.当我使用 * 包含如下所有依赖项时，它消失了。
import org.bytedeco.javacpp.*;
import org.bytedeco.leptonica.*;
import org.bytedeco.tesseract.*;
import static org.bytedeco.leptonica.global.lept.*;
import static org.bytedeco.tesseract.global.tesseract.*;
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