How to implement a search function in my Android pdf reader app?

Question

I am willing to add search functionality to my pdf reader.I dont know how do i achieve this functionality.Any help would be appreciated. Note:I am using third party library to read the pdf file. Here is the library link: https://github.com/barteksc/AndroidPdfViewer

Is it possible to implement search functionality using this library?If not then what should be the other approach(like any java library or java code for achieving this).

score 1 · Answer 1 · answered Mar 11 '21 at 16:44

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After doing some investigation about the library you provided, I found out that there have been multiple users requesting the search functionality inside of the library.

I am not familiar with the library in any way, however, if there was a way to get the text of the pdf, you can search using an EditText with a addTextChangedListener, which will iterate through the entire text of the pdf searching for the text entered.

answered Mar 11 '21 at 16:44

Sanjid Chowdhury

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The problem is that the library convert the pdf into bitmap form and then load it so i think this will not work. – Knowledge hub Mar 11 '21 at 17:42
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You can try converting the bitmap to text. See https://stackoverflow.com/questions/37287910/how-to-extract-text-from-image-android-app After conversion you can try to search for a word and maybe scroll to that specific word or highlight it – Sanjid Chowdhury Mar 11 '21 at 17:58
Thanks alot.I will try it out.Just one question is firebase ml kit free or licensed. – Knowledge hub Mar 11 '21 at 18:13
iirc it is free – Sanjid Chowdhury Mar 11 '21 at 19:42
Dont you think that library just extract the text from bitmap,it does not convert the bitmap to text form. – Knowledge hub Mar 12 '21 at 08:05

How to implement a search function in my Android pdf reader app?

1 Answers1