hide show button in android conditionally

Question

I'm a newbie on android. can you help me with this? I want to hide or show a button in a layout, but not when it is clicked. I mean, when the layout appears, the button is showed or hidden, depending on an if condition in java.

the xml is:

<Button
    android:layout_width="@dimen/icon_width1"
    android:layout_height="@dimen/icon_width1"
    android:id = "@+id/button1"

    android:background="@drawable/facebook"
    android:paddingRight="@dimen/space_1"
    android:onClick="browser1"
    android:layout_gravity="center_horizontal"
    android:layout_marginLeft="10dp" 
/>

and in my DetailActivity.java I have a function

public void browser1(View view) {
    Intent browserIntent=new Intent(Intent.ACTION_VIEW,Uri.parse("http://www.twitter.com"));
    startActivity(browserIntent);
}

can someone help with this? Regards!

I'm not sure I understood, but maybe this can help: `button.setVisibility(View.INVISIBLE)` — Omar Aflak, Aug 14 '16 at 14:09
Does this answer your question? [How to hide a button programmatically?](https://stackoverflow.com/questions/6173400/how-to-hide-a-button-programmatically) — Josh Correia, Aug 14 '20 at 03:14

score 3 · Answer 1 · answered Aug 14 '16 at 16:27

3

@A.Omar First you have to define a button in your layout xml file like this

<Button
         android:layout_width="wrap_content"
         android:text="Test Button"
         android:id="@+id/testButtonId"
         android:layout_height="wrap_content" />

then in your activity class, in the onCreate method get your button pragmatically and set the visibility of button when the button layout appears. like this

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.mylayout);

    Button testButton=(Button)findViewById(R.id.testButtonId);
            if (testButton.getVisibility()==View.VISIBLE){
                testButton.setVisibility(View.GONE);
            }else {
                  testButton.setVisibility(View.VISIBLE);
            }

}

Note make sure you don'y have two onCreate method, othervise you will get the error onCreate method is already define.

answered Aug 14 '16 at 16:27

Muazzam A.

647
5
17

what happend if the code have a onCreated metod pre definided. ? – Nicolas Daniel Avalo Aug 14 '16 at 23:01
You will get an error onCreate Method is already define in your activity – Muazzam A. Aug 15 '16 at 05:14
this works fine, but in the conditional "if" i need to hide the button if a one textView button is empty. can you helpme to do the conditional? – Nicolas Daniel Avalo Aug 21 '16 at 13:49
Nicolas i did not understand your problem can explain more? – Muazzam A. Aug 21 '16 at 17:55
you can do some thing like that if(testButton.getText().equals("")){ testButton.setVisibility(View.GONE); } – Muazzam A. Aug 21 '16 at 18:24

score 1 · Answer 2 · answered Aug 14 '16 at 14:08

1

You'll have to use the ID assigned to the button in XML, to find it in your Java code, then you can show/hide it.

The code will look like this:

Button myButton = (Button) findViewById(R.id.button1);

So your onCreate() code in an Activity would look like this:

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.mylayout);

    Button myButton = (Button) findViewById(R.id.button1);

    if(shouldShowButton()) {
        myButton.setVisibility(View.VISIBLE);
    } else {
        myButton.setVisibility(View.GONE);
    }
}

answered Aug 14 '16 at 14:08

Moonbloom

7,738
3
26
38

Error:(649, 17) error: method onCreate(Bundle) is already defined in class DetailActivity. what sould i do? – Nicolas Daniel Avalo Aug 14 '16 at 15:50
this works fine, but in the conditional "if" i need to hide the button if a one textView button is empty. can you helpme to do the conditional?. Regards! – Nicolas Daniel Avalo Aug 21 '16 at 13:48
onCreate() is already defined.. No two onCreate() methods in a class – ChanX Jun 23 '20 at 03:00

hide show button in android conditionally

2 Answers2