How to manually specified the next view id for a particular direction in android?

Question

what is the method or config for manually specified the next view for a particular direction in android?

For Example I have three buttons:

button1 button2 button3

Normally, when I click right direction, I want to change focus from button1 to button2, then button3, but if I have a strange requirement:I want to change focus from button1 to button3, then chage to button2.

A more common requirement is that when the focus is in button3, I want change focus to button1 when right direction is clicked!

how can I meet these requirement?

Answer 1

Did you try android view's nextFocusRight/Left/Up/Down properties?

<Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:nextFocusRight="@+id/button2" />

<Button
    android:id="@+id/button2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

<Button
    android:id="@+id/button3"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:nextFocusRight="@id/button1" />

You can set these properties in Java code.

    Button button1 = (Button) findViewById(R.id.button1);
    Button button2 = (Button) findViewById(R.id.button2);
    Button button3 = (Button) findViewById(R.id.button3);

    button3.setNextFocusRightId(R.id.button1);