An Android Helper for getting a Picture from the Camera or Gallery. Implemented using a headless fragment.

ImagePickerHelper.java

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ResolveInfo;
import android.content.res.AssetFileDescriptor;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.media.ExifInterface;
import android.net.Uri;
import android.os.Bundle;
import android.os.Parcelable;
import android.provider.MediaStore;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.View;

import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.List;

/**
 * Created by Alex Nitu on 5/26/2016.
 * 
 * HOW TO USE:
 * Call showImagePicker(PictureSelectedCallback) to get a picture
 */
public class ImagePickerHelper extends Fragment {

    public static final String TAG = ImagePickerHelper.class.getSimpleName();

    private static final String TEMP_IMAGE_NAME = "tempImage";

    private static final int DEFAULT_MIN_WIDTH_QUALITY = 400;

    public static final int SELECT_PICTURE_REQUEST_CODE = 0;

    public static int minWidthQuality = DEFAULT_MIN_WIDTH_QUALITY;

    private PictureSelectedCallback mCallback;

    public static ImagePickerHelper newInstance() {
        return new ImagePickerHelper();
    }

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setRetainInstance(true);
    }

    @Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch (requestCode) {
            case SELECT_PICTURE_REQUEST_CODE:
                if (resultCode == Activity.RESULT_OK) {
                    Bitmap bitmap = getImageFromResult(getActivity(), resultCode, data);
                    if (mCallback != null) {
                        mCallback.onPictureSelected(bitmap);
                    }
                } else {
                    //TODO get error from Intent
                    mCallback.onError(null);
                }
                break;
            default:
                super.onActivityResult(requestCode, resultCode, data);
                break;
        }
    }

    /*
    *call this with a PictureSelectedCallback to get a picture
    */
    public void showImagePicker(PictureSelectedCallback callback) {
        mCallback = callback;
        //TODO permissions
//        if (!PermissionHelper.hasWriteStoragePermission(getActivity())) {
//            PermissionHelper.requestWriteStoragePermission(getActivity());
//            return;
//        }
        Intent chooseImageIntent = getPickImageIntent(getActivity());
        startActivityForResult(chooseImageIntent, SELECT_PICTURE_REQUEST_CODE);
    }

    public static Intent getPickImageIntent(Context context) {
        Intent chooserIntent = null;

        List<Intent> intentList = new ArrayList<>();

        Intent pickIntent = new Intent(Intent.ACTION_PICK,
                android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
        Intent takePhotoIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        takePhotoIntent.putExtra("return-data", true);
        takePhotoIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(getTempFile(context)));
        intentList = addIntentsToList(context, intentList, pickIntent);
        intentList = addIntentsToList(context, intentList, takePhotoIntent);

        if (intentList.size() > 0) {
            chooserIntent = Intent.createChooser(intentList.remove(intentList.size() - 1), "Pick image");
            chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, intentList.toArray(new Parcelable[]{}));
        }

        return chooserIntent;
    }

    private static List<Intent> addIntentsToList(Context context, List<Intent> list, Intent intent) {
        List<ResolveInfo> resInfo = context.getPackageManager().queryIntentActivities(intent, 0);
        for (ResolveInfo resolveInfo : resInfo) {
            String packageName = resolveInfo.activityInfo.packageName;
            Intent targetedIntent = new Intent(intent);
            targetedIntent.setPackage(packageName);
            list.add(targetedIntent);
            Log.d(TAG, "Intent: " + intent.getAction() + " package: " + packageName);
        }
        return list;
    }


    public static Bitmap getImageFromResult(Context context, int resultCode,
                                            Intent imageReturnedIntent) {
        Log.d(TAG, "getImageFromResult, resultCode: " + resultCode);
        Bitmap bm = null;
        File imageFile = getTempFile(context);
        if (resultCode == Activity.RESULT_OK) {
            Uri selectedImage;
            boolean isCamera = (imageReturnedIntent == null ||
                    imageReturnedIntent.getData() == null ||
                    imageReturnedIntent.getData().toString().contains(imageFile.toString()));
            if (isCamera) {     /** CAMERA **/
                selectedImage = Uri.fromFile(imageFile);
            } else {            /** ALBUM **/
                selectedImage = imageReturnedIntent.getData();
            }
            Log.d(TAG, "selectedImage: " + selectedImage);

            bm = getImageResized(context, selectedImage);
            int rotation = getRotation(context, selectedImage, isCamera);
            bm = rotate(bm, rotation);
        }
        return bm;
    }

    private static File getTempFile(Context context) {
        File imageFile = new File(context.getExternalCacheDir(), TEMP_IMAGE_NAME);
        imageFile.getParentFile().mkdirs();
        return imageFile;
    }

    private static Bitmap decodeBitmap(Context context, Uri theUri, int sampleSize) {
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inSampleSize = sampleSize;

        AssetFileDescriptor fileDescriptor = null;
        try {
            fileDescriptor = context.getContentResolver().openAssetFileDescriptor(theUri, "r");
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }

        Bitmap actuallyUsableBitmap = BitmapFactory.decodeFileDescriptor(
                fileDescriptor.getFileDescriptor(), null, options);

        Log.d(TAG, options.inSampleSize + " sample method bitmap ... " +
                actuallyUsableBitmap.getWidth() + " " + actuallyUsableBitmap.getHeight());

        return actuallyUsableBitmap;
    }

    /**
     * Resize to avoid using too much memory loading big images (e.g.: 2560*1920)
     **/
    private static Bitmap getImageResized(Context context, Uri selectedImage) {
        Bitmap bm = null;
        int[] sampleSizes = new int[]{5, 3, 2, 1};
        int i = 0;
        do {
            bm = decodeBitmap(context, selectedImage, sampleSizes[i]);
            Log.d(TAG, "resizer: new bitmap width = " + bm.getWidth());
            i++;
        } while (bm.getWidth() < minWidthQuality && i < sampleSizes.length);
        return bm;
    }


    private static int getRotation(Context context, Uri imageUri, boolean isCamera) {
        int rotation;
        if (isCamera) {
            rotation = getRotationFromCamera(context, imageUri);
        } else {
            rotation = getRotationFromGallery(context, imageUri);
        }
        Log.d(TAG, "Image rotation: " + rotation);
        return rotation;
    }

    private static int getRotationFromCamera(Context context, Uri imageFile) {
        int rotate = 0;
        try {

            context.getContentResolver().notifyChange(imageFile, null);
            ExifInterface exif = new ExifInterface(imageFile.getPath());
            int orientation = exif.getAttributeInt(
                    ExifInterface.TAG_ORIENTATION,
                    ExifInterface.ORIENTATION_NORMAL);

            switch (orientation) {
                case ExifInterface.ORIENTATION_ROTATE_270:
                    rotate = 270;
                    break;
                case ExifInterface.ORIENTATION_ROTATE_180:
                    rotate = 180;
                    break;
                case ExifInterface.ORIENTATION_ROTATE_90:
                    rotate = 90;
                    break;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return rotate;
    }

    public static int getRotationFromGallery(Context context, Uri imageUri) {
        int result = 0;
        String[] columns = {MediaStore.Images.Media.ORIENTATION};
        Cursor cursor = null;
        try {
            cursor = context.getContentResolver().query(imageUri, columns, null, null, null);
            if (cursor != null && cursor.moveToFirst()) {
                int orientationColumnIndex = cursor.getColumnIndex(columns[0]);
                result = cursor.getInt(orientationColumnIndex);
            }
        } catch (Exception e) {
            //Do nothing
        } finally {
            if (cursor != null) {
                cursor.close();
            }
        }//End of try-catch block
        return result;
    }


    private static Bitmap rotate(Bitmap bm, int rotation) {
        if (rotation != 0) {
            Matrix matrix = new Matrix();
            matrix.postRotate(rotation);
            Bitmap bmOut = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(), bm.getHeight(), matrix, true);
            return bmOut;
        }
        return bm;
    }

    public interface PictureSelectedCallback {

        void onPictureSelected(Bitmap bitmap);

        void onError(Throwable throwable);
    }
}