Step1: First we have to add jcenter() repository to Project build.gradle

allprojects {
	    repositories {

		jcenter()
	    }
	}

Step2: Now add cropping library in our app build.gradle and synchronize the application.

    compile 'com.theartofdev.edmodo:android-image-cropper:2.2.+'

Step3: In our manifest file adding CropImageActivity under application tag

    <activity android:name="com.theartofdev.edmodo.cropper.CropImageActivity"/>

Step4: Initialize the onClick method to begin cropping and to start CropImageActivity

tvCropImage.setOnClickListener(new View.OnClickListener() {
       @Override
       public void onClick(View v) {

            v.startAnimation(AnimationUtils.loadAnimation(getActivity(), android.R.anim.fade_in));
            if (adapter.isAnySelected()) {
                File imgFile = new File(adapter.getPath());
                Intent intent = CropImage.activity(Uri.fromFile(imgFile))
                       .setGuidelines(CropImageView.Guidelines.ON)
                       .setAspectRatio(4,3)
                       .setFixAspectRatio(true)
                       .setCropShape(CropImageView.CropShape.RECTANGLE)
                       .getIntent(getContext());

                startActivityForResult(intent, CropImage.CROP_IMAGE_ACTIVITY_REQUEST_CODE);
            } else {

                Toast.makeText(getActivity(), "Please select images to crop.", Toast.LENGTH_SHORT).show();
            }
       }
});

Step5: To get the cropping result in our activity we have to override onActivityResult() method

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if (requestCode == CropImage.CROP_IMAGE_ACTIVITY_REQUEST_CODE) {

            CropImage.ActivityResult result = CropImage.getActivityResult(data);
            if (resultCode == Activity.RESULT_OK) {

                Uri resultUri = result.getUri();
            } else if (resultCode == CropImage.CROP_IMAGE_ACTIVITY_RESULT_ERROR_CODE) {

                Exception error = result.getError();
		Log.v("Exception error:",error.toString);
            }
        }
}