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I'm trying to use the method Gdx.input.isKeyJustPressed() to check if the Android BACK button was just pressed. I don't want to use the Gdx.input.isKeyPressed method to avoid multiple calls. Here is my code:

public void handleInput() {
    if(Gdx.input.isKeyJustPressed(Input.Keys.BACK)) {
         // show previous screen...
    }
}

public void update(float dt) {
    handleInput();
}

But unfortunately this doesn't work. Any ideas?

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  • \$\begingroup\$ This does work. Put a breakpoint inside handleInput() and see if the code is even reached, it's probably not and your missing a call to it somewhere deeper down the line. \$\endgroup\$
    – Madmenyo
    Jul 21 '15 at 15:22
  • \$\begingroup\$ @MennoGouw If I replace isKeyJustPressed() with isKeyPressed() it's working. The problem seems to be with the isKeyJustPressed() method. \$\endgroup\$
    – user50901
    Jul 21 '15 at 16:13
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Below code works for me, I get the message when pressing the back button.

if (Gdx.input.isKeyJustPressed(Input.Keys.BACK))
        {
            Gdx.app.log("Debug", "Back pressed!");
        }

Are you calling below method before the one above?

    Gdx.input.setCatchBackKey(true);
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  • \$\begingroup\$ I also called the setCatchBackKey(true). But it it doesn't work. I'm going to use the isKeyPressed() method and prevent multiple calls by saving the last key state and make only a call when the last key state is different from the current. \$\endgroup\$
    – user50901
    Jul 21 '15 at 21:56

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