Passing parameter from a button to android:onClick method

Question

Hi I have something like this (3 buttons) in my activity xml pointing to same method:

 <Button
        android:id="@+id/Button_1"
        android:onClick="printNo"
        android:text="@string/Button_1" />
 <Button
        android:id="@+id/Button_2"
        android:onClick="printNo"
        android:text="@string/Button_2" />

 <Button
        android:id="@+id/Button_3"
        android:onClick="printNo"
        android:text="@string/Button_3" />

Is there any way I could determine which button was pressed while in the printNo method ?

why you are using this way.. Also possible to call in java file dynamically.. — Hardik Joshi, Oct 04 '12 at 12:32

Vic Vuci · Accepted Answer · 2015-10-15T19:12:49.330

35

public void printNo( View v ) {
    switch (v.getId()) {
    case (R.id.Button_1):
        //stuff
    break;
    case (R.id.Button_2):
        //stuff
    break;
    case (R.id.Button_3):
        //stuff
    break;
}

edited Oct 15 '15 at 19:12

answered Oct 04 '12 at 12:33

Vic Vuci

6,993
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score 15 · Answer 2 · answered Oct 04 '12 at 12:39

15

As @user1106018 said - you can use tag in xml like that:

<Button android:onClick="f" android:tag="0"/>

Then it is really simple to get this tag in this way:

public void f(View v) {
    String value =  v.getTag(); 
}

answered Oct 04 '12 at 12:39

Kamil Lelonek

14,592
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Just missing a cast since getTag() returns an Object not a String – Maks Jan 08 '17 at 23:12
1

or `Integer.parseInt((String)v.getTag())` for an integer – omikes Feb 06 '19 at 21:29

score 14 · Answer 3 · edited Oct 04 '12 at 12:36

14

Simply switch over the ID:

public void printNo(View v){
    switch (v.getId()){
    case R.id.Button_1:
        break;
    case R.id.Button_2:
        break;
    case R.id.Button_3:
        break;
}

edited Oct 04 '12 at 12:36

Gilles 'SO- stop being evil'

104,111
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answered Oct 04 '12 at 12:32

Aamir Shah

4,473
8
21
28

score 6 · Answer 4 · edited Oct 04 '12 at 14:29

6

Working in my end

public void printNo(View v) {

switch (v.getId()) {

    case R.id.Button_1:
    break;

    case R.id.Button_2:
    break;

    case R.id.Button_3:
    break;
}

edited Oct 04 '12 at 14:29

pocmo

660
6
24

answered Oct 04 '12 at 12:33

user1693775

126
3

score 1 · Answer 5 · answered Oct 04 '12 at 12:34

1

In xml add tag, np with name of button.

public void printNo(View V){
    view.getTag();
    // now you can recognize view with getTag()
}

Passing parameter from a button to android:onClick method

5 Answers5