Android: Cropping an image after capture or picking from Gallery

Question

I am developing an application and as a part of that I need to crop an image after capture from camera or after picking it from gallery. I have a navigation drawer in my app and from which user can select an option to view his image (either camera or gallery). Whenever he clicks one of the options, a fragment will be called in which the rest is done (calling camera, clicking picture, getting the data and setting the image to the imageview). So, now I need to add the crop functionality for the image and I have used one of the cropping libraries available online which can be found here . Before trying it in my app, I have created a new android studio project and made a sample app in which the user can select camera by clicking a button and then cropping is done and the cropped image is set to the imageview on the screen. The project can be found here . Now, I tried to implement the same in my app but it doesn't work. Coming to the code, I have a navigation drawer class and then a fragment class. In my MainDrawerActivity (brief):

In the menu options:

if (id == R.id.nav_camera) { 
        Fragment_TouchImageView camFrag = (Fragment_TouchImageView) getSupportFragmentManager().findFragmentById(R.id.imageFragment);
        camFrag.startCamera();
    }
else if (id == R.id.nav_gallery) { 
        Fragment_TouchImageView galFrag = (Fragment_TouchImageView) getSupportFragmentManager().findFragmentById(R.id.imageFragment);
        galFrag.openGallery();
    }

Now, in my Fragment_TouchImageView.java (Fragment):

This is the entire code:

package com.example.shravan.watershed;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;

import com.soundcloud.android.crop.Crop;

import java.io.File;

public class Fragment_TouchImageView extends Fragment {

Uri imageUri;
private TouchImageView myTVF;
static final int REQUEST_IMAGE_CAPTURE = 10;
static final int PICK_IMAGE = 100;
private static Context context;
private static final String TAG = "Arunachala";

public Fragment_TouchImageView() {
    // Required empty public constructor
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View v = inflater.inflate(R.layout.fragment_fragment__touch_image_view, container, false);
    context= getActivity().getApplicationContext();
    myTVF = (TouchImageView) v.findViewById(R.id.img);
    myTVF.setImageBitmap(null);
    return v;
}

public void startCamera() {
    Intent i = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    startActivityForResult(i, REQUEST_IMAGE_CAPTURE);
}

public void openGallery() {
    Intent gallery = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.INTERNAL_CONTENT_URI);
    startActivityForResult(gallery, PICK_IMAGE);
}

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == Activity.RESULT_OK) {
        print("Camera requested");
        beginCrop(data.getData());
        print("Crop called and came to next line");
    }
    else if (requestCode == PICK_IMAGE  && resultCode == Activity.RESULT_OK)           {
        print("Gallery requested");
        beginCrop(data.getData());
        print("Crop called and came to next line");
    }
    else if (requestCode == Crop.REQUEST_CROP) {
        print("Crop.REQUEST_CROP called");
        handleCrop(resultCode, data);
        print("handleCrop called and came to next line");
    }
}

private void beginCrop(Uri source) {
    print("Crop has begun");
    Uri destination = Uri.fromFile(new File(context.getCacheDir(), "cropped"));
    Crop.of(source, destination).asSquare().start(getActivity());
    print("Crop has ended");
}

private void handleCrop(int resultCode, Intent result) {
    print("Came to handleCrop");
    if (resultCode == Activity.RESULT_OK) {
        print("RESULT OK");
        myTVF.setImageURI(Crop.getOutput(result));
    } else if (resultCode == Crop.RESULT_ERROR) {
        Toast.makeText(getActivity(), Crop.getError(result).getMessage(), Toast.LENGTH_SHORT).show();
    }
}

private void print(String s){
    Log.d(TAG, s);
}
}

So, I have given a series of Log tags to know the flow and here's the problem. Whenever I select the camera or gallery, it opens correctly and when I capture the image, beginCrop() is being called and when I select the required crop area and click Done., it does nothing. The flow is not going into this loop:

else if (requestCode == Crop.REQUEST_CROP) {
        print("Crop.REQUEST_CROP called");
        handleCrop(resultCode, data);
        print("handleCrop called and came to next line");
    }

The same works in a different sample application project without any problem.(It didn't have fragments)

Please help me figure this out!

Answer 1

几周前我在使用相同的库时遇到了相同的问题，所以问题是onActivityResult及其requestCode在片段中使用时，请尝试以这种方式调用Crop.of：

Crop.of(cropInputUri, cropOutputUri).asSquare().start(getContext(), Fragment.this, Crop.REQUEST_CROP);