RE: Blockchain - Analyse the Infineon Android Demo App - part a: Detect Card

Jan Cumps — Sun, 15 Mar 2020 15:27:24 GMT

an update on how the 3 action buttons are enabled or disabled:

There's a thread running that regularly calls this method:

[embed:dc8ab71f-3b98-42d9-b0f6-e21e02a0f8e2:3ef06e6b-9b7d-4651-b12d-db8be7f5e991:type=java&text=++++public+void+updateEuroPrice%28%29+throws+Exception+%7B%0A++++++++if+%28ethBalance+%3D%3D+null%29%0A++++++++++++return%3B%0A%0A%0A++++++++Log.d%28TAG%2C+%22reading+EUR%2FETH+price..%22%29%3B%0A++++++++TransactionPriceBean+transactionPriceBean+%3D+coinfinityClient.readEuroPriceFromApiSync%28%220%22%2C+%220%22%2C%0A++++++++++++++++ethBalance.getEther%28%29.toString%28%29%29%3B%0A++++++++Log.d%28TAG%2C+String.format%28%22reading+EUR%2FETH+price+finished%3A+%25s%22%2C+transactionPriceBean%29%29%3B%0A++++++++if+%28transactionPriceBean+%21%3D+null+%26%26+pubKeyString+%21%3D+null%29+%7B%0A++++++++++++this.runOnUiThread%28%28%29+-%3E+%7B%0A++++++++++++++++balance.setText%28String.format%28%22%25s%25s%22%2C+ethBalance.toString%28%29%2C%0A++++++++++++++++++++++++String.format%28Locale.ENGLISH%2C+%22%5CnEuro%3A+%25.2f%22%2C+transactionPriceBean.getPriceInEuro%28%29%29%29%29%3B%0A++++++++++++++++if+%28%21sendEthBtn.isEnabled%28%29%29+%7B%0A++++++++++++++++++++sendEthBtn.setEnabled%28true%29%3B%0A++++++++++++++++++++sendErc20Btn.setEnabled%28true%29%3B%0A++++++++++++++++++++votingBtn.setEnabled%28true%29%3B%0A++++++++++++++++%7D%0A++++++++++++++++displayOnUI%28GuiState.BALANCE_TEXT%29%3B%0A++++++++++++%7D%29%3B%0A++++++++%7D%0A++++%7D]

If it manages to contact the blockchain and has a known card id, the 3 function buttons are enabled:

[View:/resized-image/__size/369x413/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-eb9ab995-2e97-4ebf-aa9d-276dc82fc9b0/contentimage_5F00_193409.png:369:413]