Question

I m developing an app with a QR scanner.

我有三项活动:“Skatte”指另一个称为“Skat1”的活动。 “Skat1”包含一台QR扫描仪。当你发现并取得积极结果时,它开始征收第三次称为“Skat1Resultat”的提税。

My problem is that I need to close the "Skat1" activity completely (or at least just make it impossible to enter) when you have scanned a QR code, which means that I also need to make the button on "Skatte" which refers to "Skat1" unclickable.

我已经读过背景服务、深层和意图,但我仍然可以说明如何做。我发现一部法典,可以在你扫描时改变关于第三项活动的文本,但我需要用一个纽州或一个可点击的文本。

This is the code for when a QR code has been scanned and it moves from "Skat1" to "Skat1Resultat".

public void onActivityResult(int requestCode, int resultCode, Intent intent) {
 if (requestCode == 0) {
 if (resultCode == RESULT_OK) {
 String contents = intent.getStringExtra("SCAN_RESULT");
 String format = intent.getStringExtra("SCAN_RESULT_FORMAT");
 // Handle successful scan

  Toast toast = Toast.makeText(Skat1.this, contents, 9000);
  toast.show(); 
  startActivity(new Intent(Skat1.this, Skat1Resultat.class));
  finish();
  } 


} else if (resultCode == RESULT_CANCELED) {

 }

我在结束发言的同时,可以做这项工作并结束活动(我也曾与Destroy一道尝试过),但当你点击“Skatte”时,仍然有可能进入活动。

Answer 1

You can use a static boolean flag with value false. Set it to true when you get "resultCode == RESULT_OK"

If the flag is false then the button is clickable If the flag is true then the button is not clickable.

if(flag)
{
button.setClickable(false);
}
else
{
button.setClickable(true);
}

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