No implementation found for boolean com.gjmm.parent.crop.task.BitmapCropTask.cropCImg

[gjmm123]

最后调用cropAndSaveImage方法时提示No implementation found for boolean com.gjmm.parent.crop.task.BitmapCropTask.cropCImg(java.lang. String, java.lang. String, int, int, int, int, float, float, int, int, int, int) (tried Java_com_gjmm_parent_crop_task_BitmapCropTask_cropCImg and Java_com_gjmm_parent_crop_task_BitmapCropTask_cropCImg__Ljava_lang_String_2Ljava_lang_String_2IIIIFFIIII)，why?

[shahzadafridi]

I have spent almost hours and hours to figure this problem, at last, I found a solution for it:

I have shifted this library module to another module in my project and I removed this below line at initially it was giving error so I thought It's not needed then removed

public class BitmapCropTask extends AsyncTask<Void, Void, Throwable> {

   private static final String TAG = "BitmapCropTask";
   
   //Don't drop below lines It's mandatory
   static {
       System.loadLibrary("ucrop");
   }
   
   ....

Later on, I realized that I removed these lines so I reverted back and It works fine.

With this line, It loads the script which is placed in the Jni directory so If It's not loaded then it throws this error.

[mans17312]

Have any one solved this issue. I want to customize the cropper. But I have the same issue. I think its due to package name?

[Ehtisham95]

So, finally I found the culprit!

In my case I copied all of the files of the library to a module (To change the UI a bit and remove startActivityForResult() ) and renamed the module to other than "com.yalantis.ucrop".

While Cropping the image, this library picks up the function cropCImg(...) from a "C++" file named uCrop.cpp located in jni folders and in that file the header .h file and the function is defined as JNIEXPORT jboolean JNICALL Java_com_yalantis_ucrop_task_BitmapCropTask_cropCImg. These files are shown in the image.

Issue Since my module was renamed so it did not find the function "Java_com_yalantis_ucrop_task_BitmapCropTask_cropCImg".

Resolution:

1. Either change the names from "com_yalantis_ucrop" to your own module name e.g. "com_something_something" in the header com_yalantis_ucrop_task_BitmapCropTask.h and uCrop.cpp file.
2. OR rename the the module name back to "com.yalantis.ucrop".