2013-01-08 116 views
2

我正在開發和Android應用程序拍照並OCR它。
我有時和某個沒有得到這個錯誤不改變我的代碼,Android位圖致命信號11(SIGSEGV)

出現錯誤:01-08 20:41:59.940: A/libc(10967): Fatal signal 11 (SIGSEGV) at 0x00000000 (code=1)

我有裁剪圖像,讓用戶突出顯示文本的方法:

private void performCrop(){ 

    File file = new File(_path); 
    Uri outputFileUri = Uri.fromFile(file); 

    try{ 

     //call the standard crop action intent (the user device may not support it) 
     Intent cropIntent = new Intent("com.android.camera.action.CROP"); 
     cropIntent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri); 
     //indicate image type and Uri 
     cropIntent.setDataAndType(picUri, "image/*"); 
     //set crop properties 
     cropIntent.putExtra("crop", "true"); 
     //indicate aspect of desired crop 
     cropIntent.putExtra("aspectX", 5); 
     cropIntent.putExtra("aspectY", 1); 
     //indicate output X and Y 
     cropIntent.putExtra("outputX", 500); 
     cropIntent.putExtra("outputY", 100); 
     //retrieve data on return 
     cropIntent.putExtra("return-data", true); 
     //start the activity - we handle returning in onActivityResult 
     startActivityForResult(cropIntent, 2); 

    }catch(ActivityNotFoundException anfe){ 
     //display an error message 
     String errorMessage = "Whoops - your device doesn't support the crop action!"; 
     Toast toast = Toast.makeText(this, errorMessage, Toast.LENGTH_SHORT); 
     toast.show(); 
    } catch (Exception ex) { 
     Log.v(TAG, ex.toString()); 
    } 
} 

這裏是做方法OCR:

protected void onPhotoTaken() { 
    _taken = true; 

    BitmapFactory.Options options = new BitmapFactory.Options(); 
    options.inSampleSize = 2; 

    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(); 

    // 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. 
} 
+0

任何人都不能給我一個提示? –

回答

1

一個建議是ExifInterface初始化問題。

ExifInterface的構造函數有一個嚴重的錯誤。 它不會檢查參數文件名字符串是否爲null,也不會拋出異常,因此將JNI結果碰撞到SIGSEGV。

下面的文章將幫助你(對不起,這個職位是在日本...) http://alpha.mixi.co.jp/2013/11572/ http://alpha.mixi.co.jp/images/android-compat-jni-crash-exif.png

所以,你應該初始化ExifInterface對象之前檢查_path值。

+0

爲我節省了很多時間 – Bojan

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