Have to click a button twice for it to work in Android Studio

Question

So I am currently creating an app and one of the small things that have been bothering me is the fact that I have to click a button twice for it to work.

This is my code and I can't see anything wrong with it:

public void signUpButtonClickAction(View v){
    Button signUpButtonClick = (Button) findViewById(R.id.signUpButton);
    signUpButtonClick.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            startActivity(new Intent(MainActivity.this, Signup.class));
        }
    });
}

xml code for my button:

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/signUps"
    android:id="@+id/signUpButton"
    android:layout_marginBottom="38dp"
    android:layout_alignParentBottom="true"
    android:layout_centerHorizontal="true"
    android:onClick="signUpButtonClickAction"/>

It is probably a small fix but even I can't spot this bug

marktani · Accepted Answer · 2016-02-13T00:47:21.973

2

Solution

Remove the line android:onClick="signUpButtonClickAction" and add

Button signUpButtonClick = (Button) findViewById(R.id.signUpButton);
signUpButtonClick.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        startActivity(new Intent(MainActivity.this, Signup.class));
    }
});

to the onCreate method of your activity or the onCreateView method of your fragment.

Alternative Solution

Alternatively, change the code to this

public void signUpButtonClickAction(View v) { 
    startActivity(new Intent(MainActivity.this, Signup.class));
}

Explanation

The line android:onClick="signUpButtonClickAction" in the xml is causing an internal call to signUpButtonClick.setOnClickListener(), so you don't have to set up an onClickListener in the signUpButtonClickAction again.

Initializing multiple buttons

private void initializeButtons() {
    Button signUpButtonClick = (Button) findViewById(R.id.signUpButton);
    signUpButtonClick.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            startActivity(new Intent(MainActivity.this, Signup.class));
        }
    });

    Button anotherButton = (Button) findViewById(R.id.anotherButton);
    anotherButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Log.d("TAG", "Clicked on another button!");
        }
    });
}

Now simply call initializeButtons() from the onCreate method of your activity.

edited Feb 13 '16 at 00:47

answered Feb 12 '16 at 23:51

marktani

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Hi, why did you remove the `onClickListener`? I think it works otherwise but now I am confused as to why there is no listener :/ – Samuel Georgeszusz Feb 12 '16 at 23:54
What you were doing is to set a new onClickListener upon first click on the button. If you are using `android:onClick="signUpButtonClickAction"` in your xml, Android already sets the onClickListener internally to the method you specified - signUpButtonClickAction in this case. – marktani Feb 12 '16 at 23:58
@SamuelGeorgeszusz A listener is set by the framework and calls the method you mentioned in `android:onClick`. – Eugen Pechanec Feb 12 '16 at 23:58
@SamuelGeorgeszusz The line 'android:onClick="signUpButtonClickAction"' makes sure that your listener function is called when the signup button is clicked – chaitanya Feb 12 '16 at 23:58
I see. Thanks for the explaination - it makes sense. I never knew that the `android:onClick="signUpButtonClickAction"` makes a function call to listener. Now I know, and as you have explained it well and weren't rude therefore I have upvoted and accepted your answer :) – Samuel Georgeszusz Feb 13 '16 at 00:00
No problem, glad to help you out! I updated the post, and now list using `android:onClick` in the xml as the alternative solution, as I think manually setting the onClickListener is cleaner and less confusing. – marktani Feb 13 '16 at 00:03
Thanks, but what if I have multiple methods like `addUserButtonClickAction()`? Like how would I manually add the `onClickListener` to those? – Samuel Georgeszusz Feb 13 '16 at 00:06
Are you talking about initializing multiple buttons? What I usually do is to use a private helper function in `onCreate` that initializes every view element in my activity. – marktani Feb 13 '16 at 00:09
@mcwise do you mind please showing me an example of this private helper function in `onCreate`? Thanks – Samuel Georgeszusz Feb 13 '16 at 00:13
see my edit - did I correctly understand your question? – marktani Feb 13 '16 at 00:24

score 1 · Answer 2 · answered Feb 13 '16 at 00:00

The problem is that you are setting two times a onClick action. In your xml code you have just asign an onClick() to your button, you don't need to setOnClickListener() inside the signUpButtonClickAction(View v). You have two options:

Leave the xml file like it is and inside signUpButtonClickAction(View v) do :

public void signUpButtonClickAction(View v){
    startActivity(new Intent(MainActivity.this, Signup.class));
}

OR

Remove the onClick of your xml file:

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/signUps"
android:id="@+id/signUpButton"
android:layout_marginBottom="38dp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
/>

And do this in your Activity:

Button yourButton = (Button) findViewById(R.id.signUpButton);
yourButton.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        startActivity(new Intent(MainActivity.this, Signup.class));
    }
});

Thank you for answering my question. I will still upvote your answer as I have already accepted the previous answer. Just out of interest, how do I program a button so that it asks the user if they still want to go back? — Samuel Georgeszusz, Feb 13 '16 at 00:02
I am not sure if I understand your question, whatever action you would like to be carried out when a button is pressed you have to write it inside the onClick(). It will depend on what you are trying to do exactly, but just as an example, you can create a LinearLayout with visibility `View.GONE`, and when you click on the button you change the visibility of the LinearLayout to `View.VISIBLE` which contains two buttons, one for going back and another one for moving to the next activity, — Spirrow, Feb 13 '16 at 00:09

score 0 · Answer 3 · edited May 23 '17 at 10:29

The cause of the problem is : onclick() and onClickListener are literally the same! And you are implementing both, the end result is you'll need to press the button twice to start the Activity!

See this question for more info

FIX:

The solution to your problem is :

1:

public void signUpButtonClickAction(View v)
{
    startActivity(new Intent(MainActivity.this, Signup.class));
}

2:

Button signUpButtonClick = (Button) findViewById(R.id.signUpButton);
signUpButtonClick.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        startActivity(new Intent(MainActivity.this, Signup.class));
    }
});

score 0 · Answer 4 · answered Feb 13 '16 at 00:04

as mcwise said android:onClick="signUpButtonClickAction" and signUpButtonClick.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { startActivity(new Intent(MainActivity.this, Signup.class)); } }); does the same thing. so you have to go with one of them. Having the two is causing the problem

score 0 · Answer 5 · answered May 08 '20 at 16:04

For whom it may concern: I had the same issue but none of the solutions above solved it. For some reason I cannot understand, I had in my button this line of code:

android:textIsSelectable="true"

Deleting this attribute from the button makes it work.

This obviously made the first click to select the text, and the second click triggered the onClick button.

Have to click a button twice for it to work in Android Studio

5 Answers5

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