when using imageView in camera

written by https://stackoverflow.com/questions/34504717/android-app-crashes-on-onactivityresult-while-using-camera-intent/34626655

Follow below steps in order to take picture from camera and display onto ImageView

1) Start Camera Intent

Uri fileUri;
String photoPath = "";

 private void startingCameraIntent()
    {
        String fileName = System.currentTimeMillis()+".jpg";
        ContentValues values = new ContentValues();
        values.put(MediaStore.Images.Media.TITLE, fileName);
        fileUri = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);

        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
        startActivityForResult(intent, YOUR_REQ_CODE);
    }

2) Callback onActivityResult Function

@Override
    public void onActivityResult(int requestCode, int resultCode, Intent data)
    {
        if (resultCode == Activity.RESULT_OK)
        {
            try
            {
                photoPath = getPath(fileUri);

                System.out.println("Image Path : " + photoPath);

                Bitmap b = decodeUri(fileUri);
                your_image_view.setImageBitmap(b);
            }
            catch(Exception e)
            {
                e.printStackTrace();
            }
        }
    }

3) decodeUri Function

private Bitmap decodeUri(Uri selectedImage) throws FileNotFoundException
    {
        BitmapFactory.Options o = new BitmapFactory.Options();

        o.inJustDecodeBounds = true;

        BitmapFactory.decodeStream(getContentResolver()
                                           .openInputStream(selectedImage), null, o);

        final int REQUIRED_SIZE = 72;

        int width_tmp = o.outWidth, height_tmp = o.outHeight;

        int scale = 1;

        while (true)
        {
            if (width_tmp / 2 < REQUIRED_SIZE || height_tmp / 2 < REQUIRED_SIZE)
            {
                break;
            }
            width_tmp /= 2;

            height_tmp /= 2;

            scale *= 2;
        }

        BitmapFactory.Options o2 = new BitmapFactory.Options();

        o2.inSampleSize = scale;

        Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver()
                                                           .openInputStream(selectedImage), null, o2);

        return bitmap;
    }

4) getPath of Image

@SuppressWarnings("deprecation")
    private String getPath(Uri selectedImaeUri)
    {
        String[] projection = { MediaStore.Images.Media.DATA };

        Cursor cursor = managedQuery(selectedImaeUri, projection, null, null,
                                     null);

        if (cursor != null)
        {
            cursor.moveToFirst();

            int columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);

            return cursor.getString(columnIndex);
        }

        return selectedImaeUri.getPath();
    }

Finally In Manifest define permission

 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

Note: If you are using marshmallow (Android 6.0) you have to set Permission checks before using camera app. You can read about Android Requesting Permissions at Run Time