Can I declare android:id as array in Android?

Question

I have this code.

rele[0] = new ReleController(findViewById(R.id.button1), 1, this);
rele[1] = new ReleController(findViewById(R.id.button2), 2, this);
rele[2] = new ReleController(findViewById(R.id.button3), 3, this);
rele[3] = new ReleController(findViewById(R.id.button4), 4, this);

And my button layout looks like:

<LinearLayout style="@style/CoreLayout">

    <ImageButton
        android:id="@+id/button1"
        style="@style/Button.Blue"
        android:src="@mipmap/ic_arrow_left" />

    <ImageButton
        android:id="@+id/button2"
        style="@style/Button.Green"
        android:src="@mipmap/ic_arrow_right"/>
</LinearLayout>

<LinearLayout style="@style/CoreLayout">

    <ImageButton
        android:id="@+id/button3"
        style="@style/Button.Yellow"
        android:src="@mipmap/ic_arrow_up"/>

    <ImageButton
        android:id="@+id/button4"
        style="@style/Button.Purple"
        android:src="@mipmap/ic_arrow_down"/>
</LinearLayout>

I am trying to figure if there is a way to do something like this:

for(int i = 0; i < 4; i++)
{
  rele[i] = new ReleController(findViewById(R.id.button[i+1]), i+1, this);
}

In real, I have 8 buttons, so it is really annoying to write all these lines for all buttons.

I am wondering if the button IDs can be declared as array like this:

android:id="@+id/button[1]"
android:id="@+id/button[2]"
android:id="@+id/button[3]"
...

Thank you for all your answers.

Maybe you mean something like this stackoverflow.com/questions/15642104/… [Check the most valued answer] — RubioRic
– RubioRic, Commented Aug 17, 2016 at 8:48

babadaba · Accepted Answer · 2016-08-17 08:49:16Z

7

You can use an array to store the id of views. Just declare your array like this:

int[] buttonId = new int[] { R.id.button1, R.id.button2, R.id.button3, R.id.button4 }

Then iterate through it.

answered Aug 17, 2016 at 8:49

babadaba

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2 Comments

Martin Pohorský Over a year ago

If the functionality what I was looking for is not implemented in Android, this is the best option. Thank you really much. Shame on me I have not figured this myself :).

babadaba Over a year ago

If it's too annoying to "write all these lines" have a look at ButterKnife. It often saves alot of typing when finding and binding views. jakewharton.github.io/butterknife

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