Can I add array to android buttons?

Question

My button is:

  <Button
      android:text=""
      android:id="@+id/b1"
      android:gravity="center_horizontal"
      android:layout_width="100dp"
      android:layout_height="100dp"
      android:background="@drawable/the_border"
      android:textSize="75sp"/>

And I have many of them (b0, b1, b2)...

My java:

    for(int index = 0; index < 9; index++)
    {
        places[index] = (Button) findViewById(R.id.b + index);
        places[index].setOnClickListener(this);
    }

How could I do this? findViewById(R.id.b + index) needs to be changed. Is it possible? Thanks

Seva Alekseyev · Accepted Answer · 2012-01-06 20:07:49Z

1

Use the tag property to give them sequential tags of 0, 1, 2, etc., then findViewWithTag() in a loop to build an array. Note that tag is a string, it's not numeric.

answered Jan 6, 2012 at 20:07

Seva Alekseyev

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Comments

StErMi · Accepted Answer · 2012-01-06 20:13:07Z

0

In that way you are not adding that buttons at the layout.

1) you cannot give to those buttons (or container/element in general) the same ID. An id is an unique identifier so it has to be unique 2) findViewById will search into the layout three to find an element with that id. If that element don't exist (you are not adding them to the layout) it will fail with a nullpointerexception.

What you have to do is to create Buttons from your java code and add them to a container (for example a LinearLayout).

So you do a findViewById and look for the container, then you add View (the button) to that container.

Do you need a code example?

answered Jan 6, 2012 at 20:13

StErMi

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