我正在按照本教程将 tesseract 包含在我的 android 应用程序中。以下是我的活动代码：
package com.MyApp;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import com.googlecode.tesseract.android.TessBaseAPI;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
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.provider.MediaStore.Images.Media;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
public class OCRExample extends Activity {
protected Button _button;
protected ImageView _image;
protected TextView _field;
protected String _path;
protected boolean _taken;
protected static final String PHOTO_TAKEN = "photo_taken";
private static final int TAKE_PHOTO_CODE = 1;
public static final String PACKAGE_NAME = "com.datumdroid.android.ocr.simple";
public static final String DATA_PATH = Environment
.getExternalStorageDirectory().toString() + "/SimpleAndroidOCR/";
public static final String lang = "eng";
private static final String TAG = "SimpleAndroidOCR.java";
@Override
public void onCreate(Bundle savedInstanceState) {
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");
}
}
}
if (!(new File(DATA_PATH + "tessdata/" + lang + ".traineddata")).exists()) {
try {
AssetManager assetManager = getAssets();
InputStream in = assetManager.open("tessdata/eng.traineddata");
//GZIPInputStream gin = new GZIPInputStream(in);
OutputStream out = new FileOutputStream(DATA_PATH
+ "tessdata/eng.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());
}
}
super.onCreate(savedInstanceState);
setContentView(R.layout.ocrexample);
_image = ( ImageView ) findViewById( R.id.image );
_field = ( TextView ) findViewById( R.id.field );
_button = ( Button ) findViewById( R.id.button );
_path = DATA_PATH + "/ocr.jpg";
}
public void takepic(View v){
startCameraActivity();
}
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(OCRExample.PHOTO_TAKEN, _taken);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
Log.i(TAG, "onRestoreInstanceState()");
if (savedInstanceState.getBoolean(OCRExample.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(DATA_PATH, lang);
baseApi.setImage(bitmap);
String recognizedText = baseApi.getUTF8Text();
baseApi.end();
_field.setText(recognizedText); // Cycle done.
}
}
我收到以下错误：
07-17 14:22:49.124: E/AndroidRuntime(15702): FATAL EXCEPTION: main
07-17 14:22:49.124: E/AndroidRuntime(15702): java.lang.ExceptionInInitializerError
07-17 14:22:49.124: E/AndroidRuntime(15702): at com.MyApp.OCRExample.onPhotoTaken(OCRExample.java:210)
07-17 14:22:49.124: E/AndroidRuntime(15702): at com.MyApp.OCRExample.onActivityResult(OCRExample.java:134)
07-17 14:22:49.124: E/AndroidRuntime(15702): at android.app.Activity.dispatchActivityResult(Activity.java:4723)
07-17 14:22:49.124: E/AndroidRuntime(15702): at android.app.ActivityThread.deliverResults(ActivityThread.java:3175)
07-17 14:22:49.124: E/AndroidRuntime(15702): at android.app.ActivityThread.handleSendResult(ActivityThread.java:3222)
07-17 14:22:49.124: E/AndroidRuntime(15702): at android.app.ActivityThread.access$1100(ActivityThread.java:134)
07-17 14:22:49.124: E/AndroidRuntime(15702): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1263)
07-17 14:22:49.124: E/AndroidRuntime(15702): at android.os.Handler.dispatchMessage(Handler.java:99)
07-17 14:22:49.124: E/AndroidRuntime(15702): at android.os.Looper.loop(Looper.java:137)
07-17 14:22:49.124: E/AndroidRuntime(15702): at android.app.ActivityThread.main(ActivityThread.java:4697)
07-17 14:22:49.124: E/AndroidRuntime(15702): at java.lang.reflect.Method.invokeNative(Native Method)
07-17 14:22:49.124: E/AndroidRuntime(15702): at java.lang.reflect.Method.invoke(Method.java:511)
07-17 14:22:49.124: E/AndroidRuntime(15702): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:787)
07-17 14:22:49.124: E/AndroidRuntime(15702): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:554)
07-17 14:22:49.124: E/AndroidRuntime(15702): at dalvik.system.NativeStart.main(Native Method)
07-17 14:22:49.124: E/AndroidRuntime(15702): Caused by: java.lang.UnsatisfiedLinkError: Couldn't load lept: findLibrary returned null
07-17 14:22:49.124: E/AndroidRuntime(15702): at java.lang.Runtime.loadLibrary(Runtime.java:365)
07-17 14:22:49.124: E/AndroidRuntime(15702): at java.lang.System.loadLibrary(System.java:535)
07-17 14:22:49.124: E/AndroidRuntime(15702): at com.googlecode.tesseract.android.TessBaseAPI.<clinit>(TessBaseAPI.java:47)
我的项目缺少什么？我的代码中的第 210 行（发生错误的地方）是这样的：
TessBaseAPI baseApi = new TessBaseAPI();