Screen Resize by use of finger pinches

[Marco Valdo]

Hi,  we are in the final phase of the development of an educational app in a school. We need to be able to enlarge the screen size (zoom) to better read information/ see images by use of finger pinches. Going thru tutorials and docs we have been unable to locate the procedures to do that. Can anybody help us?

Thank you in advance.

[Scott Ferguson]

You can use finger pinches in the WebViewer.

That would mean that you need the information in an html document which supports text and images.

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Scott

[Taifun]

Hi,  we are in the final phase of the development of an educational app in a school.

normally this is something you test first before starting development...

 

We need to be able to enlarge the screen size (zoom) to better read information/ see images by use of finger pinches. 

only the webviewer can do this

probably this can help:  http://puravidaapps.com/label.php

How to use the Webviewer to zoom images in and out

Taifun

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Trying to push the limits of App Inventor! Snippets and Tutorials from Pura Vida Apps by Taifun.                

[Marco Valdo]

Thank you Scott and Taifun! I will try your suggestions.

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Alberto

[Marco Valdo]

By using this method described at   http://puravidaapps.com/snippets1.php#zoom :

During development, you have to use the development path to the image.

file:///mnt/sdcard/AppInventor/assets/whalestail.jpg

Before packaging the app, use the production path.

file:///android_asset/whalestail.jpg

(including the block call to url file:///mnt/sdcard/AppInventor/assets/whalestail.jpg (during development) and file:///android_asset/whalestail.jpg (before build and testing).  I constantly get the error Web Page unavailable. The good news is that the zoom function is there. I have got a wifi/3G connection available, am testing the apk on the device and using AI2. Thank you for any suggestions.

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Alberto

[Taifun]

you might want to provide a screenshot of your relevant blocks

[Marco Valdo]

Sure! (pls see attchmt)

 

[Taifun]

did you upload the file bernardostrozzilacuoca.jpeg as asset into your App Inventor project? 

Note: the file names are case sensitive.
does it work neither in development nor after building your app?

which device are you using for the test?

Taifun

[Marco Valdo]

I have uploaded is as Media (that is I have uploaded  it in the AI2project/DB). The doubt I have when I saw  in the path 'assets' is that I should do something else, may be this is my mistake... 

- Thank you for the case sensitive hint (anyhow i copy&paste filenames).

- it does not

- a sony xperia phone (android v.4.0.4) and a google tablet (android v.4.4.2)

Thank you for your support.

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Alberto

[Taifun]

I have uploaded is as Media

that's fine

you might want to provide a screenshot of your Media (see my screenshot) and a screenshot of the error message

Taifun

[Marco Valdo]

Here you go!

the android screenshot refers to another screen I attempted to apply the zoom feature (the error wording is the same). Since the error msg is in Italian, translation is: Web page not available: web page at address file:///mnt... could be not available or was moved to another address. Some suggestions: Check that that data connection and signal are on. Reload webpage later. View the cache copy of the web page on google. 

Please not that data connection is on (I put apk on my dropbox, download it on my phone and install it on the phone) 

Thanks. 

[Taifun]

from screenshot 1 the file which was not found is called PRIMAPAGIN.jpg

but in the thread you were talking about the file bernardostrozzilacuoca.jpeg and this file we also can see in the media assets screenshot...

so I would try to open bernardostrozzilacuoca.jpeg with the webviewer instead of PRIMAPAGIN.jpeg...

Taifun

[Marco Valdo]

The android screenshot is just to show the wording. It appears every time I try to implement zoom on different screens (if it works I would like to apply zoom to a dozen of screens :-) ) and heppemed also on PRIMAPAGIN. In any case, please find attached  PRIMAPAGIN_ZOOMPROBLEM.png that demonstrates that PRIMAPAGIN belong to the Media set of the same project. Thanks.

[Taifun]

ok, as asset you have a file called PRIMAPAGIN.JPEG and you are trying to call  PRIMAPAGIN.jpeg with the webviewer

Do you see the difference? The names are case sensitive...

Taifun

[Marco Valdo]

I do :-) . Filename to me is Filename (no extension), that's why I did not realize it at once (in fact for PRIMAPAGIN I copy and pasted from a txt in which I had written manually...). 

It works!

Thank you, Taifun!!!

[Marco Valdo]