我认为我的路径有问题，但我不知道是什么。如果相关，我正在 Nexus 7 上进行测试。以下示例我尝试将 tessdata 文件夹复制到 SD 卡，但它一直告诉我无法复制找不到文件。我不太明白为什么。（我将 tesseract 项目作为库，并将 tessdata 文件夹复制到资产中）。感谢所有帮助！
代码：
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
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.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
import com.googlecode.tesseract.android.TessBaseAPI;
public class MainActivity extends Activity {
private static ImageView imageView;
// protected static Bitmap bit;
protected static Bitmap mImageBitmap;
// protected static String DATA_PATH;
public static final String STORAGE_PATH = Environment.getExternalStorageDirectory().toString() + "/rjb";
protected static String tesspath = STORAGE_PATH + "/tessdata";
protected static String savepath = null;
protected static String TAG = "OCR";
protected static String lang = "eng";
// main method
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// This is my image view for to show the image with
imageView = (ImageView) this.findViewById(R.id.imageView1);
// this is the take a photo button
Button photoButton = (Button) this.findViewById(R.id.button1);
//check if the rjb directory is there
//make it if its not
createmydir();
//if (!(new File(STORAGE_PATH + File.separator + "tessdata" + File.separator + lang + ".traineddata")).exists()) {
try {
AssetManager assetManager = this.getAssets();
//open the asset manager and open the traineddata path
InputStream in = assetManager.open("tessdata/eng.traineddata");
OutputStream out = new FileOutputStream(tesspath + "/eng.traineddata");
byte[] buf = new byte[8024];
int len;
while ((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
}
in.close();
out.close();
} catch (IOException e) {
android.util.Log.e(TAG, "Was unable to copy " + lang
+ " traineddata " + e.toString());
android.util.Log.e(TAG, "IM PRINTING THE STACK TRACE");
e.printStackTrace();
}
//} else {
processImage(STORAGE_PATH + File.separator + "savedAndroid.jpg");
//}
photoButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// CALL THE PICTURE (this works)
dispatchTakePictureIntent(0);
}
});
}
private void createmydir() {
File t = new File(STORAGE_PATH);
if(t.exists()) {
Toast.makeText(getApplicationContext(), "IM TOASTIN CAUSE IT EXISTS", Toast.LENGTH_LONG).show();
}
else {
t.mkdirs();
Toast.makeText(getApplicationContext(), "IM TOASTIN CUZ I MADE IT EXIST", Toast.LENGTH_LONG).show();
}
}
private void handleSmallCameraPhoto(Intent intent) {
Bundle extras = intent.getExtras();
mImageBitmap = (Bitmap) extras.get("data");
imageView.setImageBitmap(mImageBitmap);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 4;
saveImageAndroid(mImageBitmap);
Bitmap bitmap = BitmapFactory.decodeFile(savepath, options);
ExifInterface exif;
try {
exif = new ExifInterface(savepath);
int exifOrientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION,ExifInterface.ORIENTATION_NORMAL);
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;
}
if (rotate != 0) {
int w = bitmap.getWidth();
int h = bitmap.getHeight();
// Setting pre rotate
Matrix mtx = new Matrix();
mtx.preRotate(rotate);
// Rotating Bitmap & convert to ARGB_8888, required by tess
bitmap = Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, false);
bitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true);
}
// DATA_PATH = getDataPath();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
handleSmallCameraPhoto(data);
}
// write bitmap to storage
// saves it as savedandroid.jpg
// saves location in savepath
private void saveImageAndroid(final Bitmap passedBitmap) {
try {
savepath = STORAGE_PATH + File.separator + "savedAndroid.jpg";
FileOutputStream mFileOutStream = new FileOutputStream(savepath);
passedBitmap.compress(Bitmap.CompressFormat.JPEG, 100,mFileOutStream);
mFileOutStream.flush();
mFileOutStream.close();
} catch (Exception e) {
e.printStackTrace();
}
}
private void dispatchTakePictureIntent(int actionCode) {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(takePictureIntent, actionCode);
}
private void processImage(final String filePath) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 2;
options.inPurgeable = true;
Bitmap bitmap = BitmapFactory.decodeFile(filePath, options);
if (bitmap != null) {
/*
* was for rotating but no longer needed int width =
* bitmap.getWidth(); int height = bitmap.getHeight(); Matrix matrix
* = new Matrix(); matrix.postRotate(rotation); bitmap =
* Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, false);
* bitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true);
*/
TessBaseAPI baseApi = new TessBaseAPI();
baseApi.setDebug(true);
baseApi.init(STORAGE_PATH, "eng");
baseApi.setPageSegMode(100);
baseApi.setPageSegMode(7);
baseApi.setImage(bitmap);
String recognizedText = baseApi.getUTF8Text();
android.util.Log.i(TAG, "recognizedText: 1 " + recognizedText);
baseApi.end();
if (lang.equalsIgnoreCase("eng")) {
recognizedText = recognizedText
.replaceAll("[^a-zA-Z0-9]+", " ");
}
android.util.Log.i(TAG,
"recognizedText: 2 " + recognizedText.trim());
}
}
}