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Overcoming the Challenges of Integrating an EPU...

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September 24, 2023
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Overcoming the Challenges of Integrating an EPUB Viewer into a Modern Android App

Epub is an open standard, digital publication format that is used to distribute electronic books. We can take use of some Epub SDKs to display an Epub Viewer in Android APP.

In a Modern Android APP, developers can use AndroidView in Compose to display Epub Viewer from a SDK. However, to make the Epub Viewer work smoothly and interact well with compose view (such as a controller composable above the viewer) still have much challenges.

In this talk, I will explain a modern android structure for importing an Epub Viewer. And also for other AndroidView components, how to avoid recomposition, handle data flow and other issues.

Intended Audience:
People Who
* Want to develop Epub viewers
* Want to develop AndroidView in Compose
* Have developed AndroidView in Compose beforehand
* Want know handling both AndroidView and Compose

Bing

September 24, 2023
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Transcript

  1. ʫ Ɣ ʴˡˢˣ˘ˡ˦˧˔ˡ˗˔˥˗˙ˢ˥˘ʵˢˢ˞˗˜˦˧˥˜˕˨˧˜ˢˡ Ɣ ˆ˨ˣˣˢ˥˧˘˗˕ˬ˔˪˜˗˘˥˔ˡ˚˘ˢ˙˗˘˩˜˖˘˦ Ɣ ˆ˨ˣˣˢ˥˧˙ˢ˥ʥ˧ˬˣ˘˦ˢ˙˟˔ˬˢ˨˧ ż ˅˘˙˟ˢ˪˔˕˟˘ʭ˧˘˫˧ʠ˕˔˦˘˗˕ˢˢ˞˦ ż

    ʹ˜˫˘˗ʭˣ˜˖˧˨˥˘ʠ˕˔˦˘˗˕ˢˢ˞˦ Ɣ ˁ˘˪˘˦˧˩˘˥˦˜ˢˡʦʡʦ˜˦˥˘˟˘˔˦˘˗ˢˡˀ˔ˬʥʨʟʥʣʥʦ ʸ˃ˈʵʼˡ˧˥ˢ˗˨˖˧˜ˢˡ ˊ˛˔˧˜˦ʸ˃ˈʵʲ
  2. ˆ˔˩˘˗˔˧˔˧ˢ˦˨˥˩˜˩˘ʴˣˣ ˖˟ˢ˦˨˥˘ Ɣ ʿ˔˦˧˥˘˔˗˜ˡ˗˘˫ Ɣ ʿ˔˦˧˦˘˧˧˜ˡ˚˩˔˟˨˘˦ Ɣ ʶ˔˖˛˘ ʤʦ 8,/D\HU

    'RPDLQ/D\HU 5HSRVLWRULHV ʷ˔˧˔ʿ˔ˬ˘˥ 5RRP'DWDEDVH ˆ˧˥˨˖˧˨˥˘ʼˡ˧˥ˢ˗˨˖˧˜ˢˡ ʷ˔˧˔ʿ˔ˬ˘˥
  3. Ɣ ʼˠˣˢ˥˧ʸ˃ˈʵˆʷʾ Ɣ ˅˘ˡ˗˘˥˜ˡ˚ʸ˃ˈʵ ˉ˜˘˪˘˥˔ˡ˗ˢ˧˛˘˥ ʶˢˠˣˢ˦˔˕˟˘˦ ʤʨ 'RPDLQ/D\HU 'DWD/D\HU (SXE9LHZHU

    &RPSRVDEOH 9LHZ0RGHO ˈʼʿ˔ˬ˘˥ (SXE6'. ˆ˧˥˨˖˧˨˥˘ʼˡ˧˥ˢ˗˨˖˧˜ˢˡ ˈʼʿ˔ˬ˘˥
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  6. ʥʩ Ɣ ˇ˛˘˨ˣ˗˔˧˘˕˟ˢ˖˞˖˔ˡ˕˘˥˨ˡˠ˨˟˧˜ˣ˟˘˧˜ˠ˘˦ʛˢˡ˧˛˘ˈʼ ˧˛˥˘˔˗˔˦˪˘˟˟ʜ˗˨˘˧ˢ˥˘˖ˢˠˣˢ˦˜˧˜ˢˡ Ɣ ˈ˦˘˜˧˙ˢ˥ ż ˂˕˦˘˥˩˘˦˧˔˧˘˖˛˔ˡ˚˘˦˪˛˜˖˛˖˔˨˦˘˧˛˘˪˛ˢ˟˘˩˜˘˪ ˥˘˖ˢˠˣˢ˦˘ Ɣ

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  8. Ɣ ʷ˜˦ˣˢ˦˔˕˟˘ʸ˙˙˘˖˧ ż ʿ˜˙˘˖ˬ˖˟˘˔˪˔˥˘˙˨ˡ˖˧˜ˢˡ Ɣ ʿ˔˨ˡ˖˛˘˗ʸ˙˙˘˖˧ ż ʸ˩˘ˡ˧˛˔ˡ˗˟˘˥ ż ˃˔˥˧˜˔˟˩˜˘˪˖˛˔ˡ˚˘˦

    ʥʬ ʼˠˣ˟˘ˠ˘ˡ˧˔˧˜ˢˡ˔ˡ˗ʶ˛˔˟˟˘ˡ˚˘˦ ʴˡ˗˥ˢ˜˗ˉ˜˘˪ ˈˡ˗˘˥˦˧˔ˡ˗˜ˡ˚ˢ˧˛˘˥ˆ˜˗˘ʠ˘˙˙˘˖˧˦
  9. ʦʣ 'LVSRVDEOH(IIHFW OLIHF\FOH2ZQHU ^ YDOREVHUYHU /LIHF\FOH(YHQW2EVHUYHU^BHYHQW! ZKHQ HYHQW ^ /LIHF\FOH(YHQW21B67$57!

    YLHZHU5HIJHW "DFWLYLW\6WDWH 6N\$FWLYLW\6WDWH6WDUWHG ª ` ` OLIHF\FOH2ZQHUOLIHF\FOHDGG2EVHUYHU REVHUYHU RQ'LVSRVH^ OLIHF\FOH2ZQHUOLIHF\FOHUHPRYH2EVHUYHU REVHUYHU ` `
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  12. 9LHZ0RGHO ʧʣ ˆ˧˔˧˘ ˈʼʼˡˣ˨˧ ˃˟˨˦ʭʴʶ˟˘˔˥ˆ˧˥˨˖˧˨˥˘˜ˡˆ˔ˠˣ˟˘ʴˣˣ ˈʼʼˡˣ˨˧ ˆ˧˔˧˘ Ɣ ʶˢˡ˧˥˔˖˧ ż

    ʶ˟˘˔˥˟˜˦˧ˢ˙ˈʼ˜ˡˣ˨˧ ˔ˡ˗˦˧˔˧˘ Ɣ ʸ˩˘ˡ˧ʻ˔ˡ˗˟˘˥ ż ʶˢˠˠˢˡ˙˨ˡ˖˧˜ˢˡ˧ˢ ˦˖˛˘˗˨˟˘ʙ˖ˢˡ˦˨ˠ˘ ˘˩˘ˡ˧˦ 8,(OHPHQW ˈʼʿ˔ˬ˘˥ (YHQW+DQGOHU &RQWUDFW
  13. ʧʥ ʴ˖ˢˠˣ˟˘˧˘ʸˣ˨˕ʴˣˣ˛˔˦ ʨ˱ʤʣ˧˜ˠ˘˦˦˧˔˧˘˧˛˔ˡ˕˘˟ˢ˪Ϩ ˜˦ʿˢ˔˗˜ˡ˚ ˘˥˥ˢ˥ ˜˦ʹ˜˫˘˗˂˥˅˘˙˟ˢ˪˔˕˟˘ʿ˔ˬˢ˨˧ ˕ˢˢ˞˃˔˧˛ ˜ˡ˜˧˜˔˟˃ˢ˦˜˧˜ˢˡʵˢˢ˞ ˕ˢˢ˞ʶˢ˗˘ ˙ˢˡ˧ˆ˜˭˘

    ˜˦ˆ˛ˢ˪ʶˢˡ˧˥ˢ˟˟˘˥ ˜˦ˇ˂ʶˉ˜˦˜˕˟˘ ˖˨˥˥˘ˡ˧ʼˡ˗˘˫ ˇˢ˧˔˟˃˔˚˘ ˆ˛ˢ˪ˇˢ˔˦˧ ˅˘ˤ˨˘˦˧ʽ˨ˠˣˇˢ˃˔˚˘ ˅˘ˤ˨˘˦˧ʽ˨ˠˣˇˢʼˡ˗˘˫
  14. ʧʦ ʴ˖ˢˠˣ˟˘˧˘ʸˣ˨˕ʴˣˣ˛˔˦ ʨ˱ʤʣ˧˜ˠ˘˦˦˧˔˧˘˧˛˔ˡ˕˘˟ˢ˪Ϩ ˜˦ʿˢ˔˗˜ˡ˚ ˘˥˥ˢ˥ ˜˦ʹ˜˫˘˗˂˥˅˘˙˟ˢ˪˔˕˟˘ʿ˔ˬˢ˨˧ ˕ˢˢ˞˃˔˧˛ ˜ˡ˜˧˜˔˟˃ˢ˦˜˧˜ˢˡʵˢˢ˞ ˕ˢˢ˞ʶˢ˗˘ ˙ˢˡ˧ˆ˜˭˘

    ˜˦ˆ˛ˢ˪ʶˢˡ˧˥ˢ˟˟˘˥ ˜˦ˇ˂ʶˉ˜˦˜˕˟˘ ˖˨˥˥˘ˡ˧ʼˡ˗˘˫ ˇˢ˧˔˟˃˔˚˘ ˆ˛ˢ˪ˇˢ˔˦˧ ˅˘ˤ˨˘˦˧ʽ˨ˠˣˇˢ˃˔˚˘ ˅˘ˤ˨˘˦˧ʽ˨ˠˣˇˢʼˡ˗˘˫ ʻˢ˪˧ˢˠ˔ˡ˔˚˘˧˛˘ˠʲ
  15. ʧʧ ʵ˔˖˞˧ˢ˖˛˘˖˞ˢ˨˥˚ˢ˔˟˦Ϩ Ɣ ˆ˜ˡ˚˟˘˦ˢ˨˥˖˘ˢ˙˧˥˨˧˛ Ɣ ˈˡ˜˗˜˥˘˖˧˜ˢˡ˔˟ʷ˔˧˔ʹ˟ˢ˪ʛˈʷʹʜ Ɣ ˆ˘ˣ˔˥˔˧˜ˢˡˢ˙˖ˢˡ˖˘˥ˡ˦ Ɣ ʵ˘˦˧˃˥˔˖˧˜˖˘ʛ˥˘˙˘˥ʜ

    ż ˌˢ˨˦˛ˢ˨˟˗˛ˢ˜˦˧ˈʼ˦˧˔˧˘˧ˢ˧˛˘˟ˢ˪˘˦˧˖ˢˠˠˢˡ˔ˡ˖˘˦˧ˢ˥ ˕˘˧˪˘˘ˡ˔˟˟˧˛˘˖ˢˠˣˢ˦˔˕˟˘˦˧˛˔˧˥˘˔˗˔ˡ˗˪˥˜˧˘˜˧ʡ ż ˌˢ˨˦˛ˢ˨˟˗˞˘˘ˣ˦˧˔˧˘˖˟ˢ˦˘˦˧˧ˢ˪˛˘˥˘˜˧˜˦˖ˢˡ˦˨ˠ˘˗ʡ
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    Ɣ ˆ˧˔˧˘˪˜˧˛ˈʼ˦˖ˢˣ˘ ż ʼ˦ˢ˟˔˧˘˗˜ˡˈʼ˘˟˘ˠ˘ˡ˧ ˦˖ˢˣ˘ ż ˆ˜ˠˣ˟˘ ż ˊ˜˧˛˦˜ˠˣ˟˘ˈʼ˟ˢ˚˜˖ 3ODLQ6WDWH+ROGHU 9LHZ0RGHO ʼˠˣ˟˘ˠ˘ˡ˧˔˧˜ˢˡ˔ˡ˗ʶ˛˔˟˟˘ˡ˚˘˦ ˆˢ˟˨˧˜ˢˡ
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  23. ʨʧ #6WDEOH FODVV%RRN9LHZHU6WDWH'DWD^ YDULV72&9LVLEOH%RROHDQE\PXWDEOH6WDWH2I IDOVH  FRPSDQLRQREMHFW^ YDO6DYHU UXQ^` `

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  27. ʩʧ Ɣ (38%6'. ż 0DLQWDLQVRQHLQGH[YDOXHLQVLGH Ɣ 6WDWH+ROGHU ż +DQGOHVLQGH[VWDWHV\QFZLWK6'.¶VYDOXH Ɣ

    8,HOHPHQWV ż (38%9LHZHU ż &RPSRVDEOH6HHNEDU ʸ˫˔ˠˣ˟˘ʭʶ˨˥˥˘ˡ˧ʼˡ˗˘˫
  28. ʩʩ ˈ˦˘ʶ˔˦˘ʥʭˈ˦˘˥ʴ˗˝˨˦˧˦˃˥ˢ˚˥˘˦˦ˊ˜˧˛˜ˡˆ˘˘˞˕˔˥ (38%9LHZHU 6HHNEDU 6'. 6WDWH+ROGHU LQGH[ VWDWHLQGH[ ʦʡʴ˃ʼ˖˔˟˟ʟ˝˨ˠˣˇˢʛʡʡʡʜ ʧʡˆʷʾ˜ˡ˗˘˫˖˛˔ˡ˚˘

    ʨʡʿ˜˦˧˘ˡ˘˥˧˥˜˚˚˘˥˘˗ʟ ʠʱ˨ˣ˗˔˧˘˦˧˔˧˘ ʩʡˈʼˢ˕˦˘˥˩˘˦ ˦˧˔˧˘˖˛˔ˡ˚˘ ʥʡˈʼʸ˩˘ˡ˧˧˥˜˚˚˘˥˘˗ʭ ˅˘ˤ˨˘˦˧˃˔˚˜ˡ˚ ʤʡˈ˦˘˥˗˥˔˚˦ˣ˥ˢ˚˥˘˦˦ ʠʱˢˡˆ˘˘˞˕˔˥ʶ˛˔ˡ˚˘ʹ˜ˡ˜˦˛˘˗ˮ˰
  29. Ɣ ʶˢˠˣˢ˦˔˕˟˘ ż ʶˢˡ˙˜˚˨˥˘ˀ˔ˡ˜˙˘˦˧ʖ˔ˡ˗˥ˢ˜˗ʭ˖ˢˡ˙˜˚ʶ˛˔ˡ˚˘˦˧ˢ ˔˩ˢ˜˗ʸ˃ˈʵˉ˜˘˪˘˥˥˘˦˧˔˥˧˗˨˥˜ˡ˚˥ˢ˧˔˧˜ˢˡ Ɣ ʹˢˡ˧ˆ˧ˬ˟˘ ż ˁˢ˧˘ʽ˔ˣ˔ˡ˘˦˘˙ˢˡ˧˦˧ˬ˟˘˖˔ˡ˕˘˧˥˜˖˞ˬ Ɣ

    ʻ˔ˡ˗˟˘ʿ˔˥˚˘ʵˢˢ˞ʹ˜˟˘ ż ˀ˔˞˘˨˦˘ˢ˙ʶ˔˖˛˘ ż ˆ˞˜ˣ˟ˢˡ˚ʠ˧˜ˠ˘ʴˡ˔˟ˬ˦˜˦˜˙ˡ˘˘˗˘˗ ʪʣ ˂˧˛˘˥ˇ˜ˣ˦˔ˡ˗ʴ˗˩˔ˡ˖˘˗ʹ˘˔˧˨˥˘˦ ʴ˕ˢ˨˧ˇ˜ˣ˦