Resize scratchview programatically

[maneca]

Hello,

First of all, thank you for the work you have made by creating this library. It is great!

I have an issue. I have been trying to resize the view that holds the image to scratch but I cannot reset the values for the height or the width. I can reset the margins but I can't resize it. Can you help me?

Here is my code:

RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
float y_factor = (float) ((double) height)/720;
float x_factor = (float) ((double) width)/1196;
ImageMargins next_image_margins = margins[next_image];

params.setMargins(Math.round((next_image_margins.getLeft()) * x_factor),Math.round((next_image_margins.getTop()) * y_factor),Math.round((next_image_margins.getRight()) * x_factor),Math.round((next_image_margins.getBottom()) * y_factor));

to_erase.setLayoutParams(params);
to_erase.getLayoutParams().height = 2000;
to_erase.getLayoutParams().width = 500;

to_erase.requestLayout();
to_erase.setScratchAll(false);
updatePercentage(0f);

[winsontan520]

I think you should setLayoutParam after setting height and width

android.view.ViewGroup.LayoutParams layoutParam = scratchView.getLayoutParams();
layoutParam.height=2000;
layoutParam.width=500;
scratchView.setLayoutParams(layoutParam);

[maneca]

Hello winsontan520.

Thanks for your reply :)

I have tried that but it did not work. I must be doing something very stupid... :/

[maneca]

Hi @winsontan520,

I managed to solve this issue by re-defining the drawable:

Drawable dr = getResources().getDrawable(R.drawable.imagem_jj);
Bitmap bitmap = ((BitmapDrawable) dr).getBitmap();

Drawable d = new BitmapDrawable(getResources(),
Bitmap.createScaledBitmap(bitmap,Math.round(sizes[next_image].getWidth()*x_factor), Math.round(sizes[next_image].getHeight()*y_factor), true));

to_erase.setScratchDrawable(d);
to_erase.setLayoutParams(params);

On another topic, I noticed that sometimes, when I pass the finger over the image I want to scratch, nothing happens. From my tests, it appears that the issue is with the Android API, mainly the onTouch method.

Did you notice this also?

[winsontan520]

it was designed as scratch to reveal but not touch to reveal, mean you need to touch and drag it to reveal. On 4 Sep, 2015 10:28 pm, "Joao Ferreira" [email protected] wrote:

Hi winsontan520,

I managed to solve this issue by re-defining the drawable:

Drawable dr = getResources().getDrawable(R.drawable.imagem_jj); Bitmap bitmap = ((BitmapDrawable) dr).getBitmap();

Drawable d = new BitmapDrawable(getResources(), Bitmap.createScaledBitmap(bitmap,Math.round(sizes[next_image].getWidth()_x_factor), Math.round(sizes[next_image].getHeight()_y_factor), true));

to_erase.setScratchDrawable(d); to_erase.setLayoutParams(params);

On another topic, I noticed that sometimes, when I pass the finger over the image I want to scratch, nothing happens. From my tests, it appears that the issue is with the Android API, mainly the onTouch method.

Did you notice this also?

— Reply to this email directly or view it on GitHub https://github.com/winsontan520/Android-WScratchView/issues/18#issuecomment-137750600 .

[maneca]

@winsontan520

I know that but sometimes when I scratch the image nothing happens. I tested in different smartphones and it happens in all of them but as I said is not always, only sometimes.

Does this also happen to you?

[gilbert1991]

Hi Joao,

Test it in release apk.

2015-09-05 10:26 GMT-04:00 Joao Ferreira [email protected]:

@winsontan520 https://github.com/winsontan520

I know that but sometimes when I scratch the image nothing happens. I tested in different smartphones and it happens in all of them but as I said is not always, only sometimes.

Does this also happen to you?

— Reply to this email directly or view it on GitHub https://github.com/winsontan520/Android-WScratchView/issues/18#issuecomment-137960189 .

[maneca]

Hi @gilbert1991

I have tested it and it also happened. I think that it may not have to be with the library itself but with the Android API. I am just asking to see if this is something that you are aware of.

[gilbert1991]

I met this in debug mode but not release versions. Sometimes just delayed reveal so try smaller revealSize.

[maneca]

I also noticed the delayed reveal but that for me is not a "problem".

What is happening is that nothing happens when I scratch. I tried to debug it and the onTouch method that you use on your library, in the situations where nothing happens, it does not recognize the touch on the screen.

[gilbert1991]

See if onTouch was called or override. Otherwise should be devices problem

[maneca]

OnTouch is not called when this issue happens.

[maneca]

Hello again @gilbert1991,

we have discovered why this is happening. If the user's first touch is not on the image that he wants to erase then his movements are not recognized and t ans even though he can pass with his finger over the image, nothing is scratched.

I am trying to figure out a way to overcome this.