android_dpad_detector

A widget to respond to Android DPad key event. Note that this widget is only for Android TV apps, it only helps solve some annoying problems when adapting your apps for Andoird TV platform.

How to use it?

Simple enough. Just wrap a whatever widget you want with AndroidDPadDetector. For example, I want to make a TextButton respond to DPad Select event, I could write like this:

DPadDetector(
  onTap: () {
    /// On Android TV, this will respond when DPad "Select" button is pressed.
    /// On Android mobile phones, this will be the equal to `onTap` event.
  },
  onMenuTap: () {
    /// On Android TV, this will respond when DPad "MenuContext" button is pressed.
    /// On Android mobile phones, this will be equal to `onLongTap` event.
  },
  child: TextButton(...),
)

When there are complex focusable widgets in your page, for example: TextFormField, the normal FocusGroup will be behave abnormally. In that situation, you could use DPadFocusGroup. DPadFocusGroup helps you manage your FocusNodes in a List order you have just passed to this Widget. For example, if you want to manage the FocusNodes in your specified order in a group of child widgets including TextFormField, you could code like this:

List<FocusNode> focusNodeList = [
  FocusNode(),
  FocusNode(),
  FocusNode(),
];

/// ignored code...

DPadFocusGroup(
	focusNodeList: focusNodeList,
  children: [
    /// ①
    TextFormField(
    	focusNode: focusNodeList[0],
    ),
    /// ②
    DPadDetector(
      focusNode: focusNodeList[1],
      child: Text("text"),
    ),
    /// ③
    TextFormField(
    	focusNode: focusNodeList[2],
    ),
  ],
);

If you code like that, when you press →, ↓ on your DPad continually, your FocusNode will change like this: ①→②→③→①...

When you press ←, ↑ on your DPad continually, your FocusNode will change like this: ①→③→②→①...