Question

I m trying to use Jetpack Compose in my existing AndroidTV App. I need to make a button with microphone icon which will change its color if it s focused. Like this^

重点

一、导言

<androidx.compose.ui.platform.ComposeView
    android:id="@+id/micBtn"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"/>

在这里,我把该守则一分为二。

binding.micBtn.setContent {
    var buttonResId by remember { mutableStateOf(R.drawable.speech_recognition_button_unfocused) }
    IconButton(
        modifier = Modifier
            .size(60.dp)
            .onFocusChanged {
                buttonResId = if (it.is重点) {
                    R.drawable.speech_recognition_button_focused
                } else {
                    R.drawable.speech_recognition_button_unfocused
                }
            },
        onClick = onClick,
    ) {
        Icon(
            painter = painterResource(id = buttonResId),
            contentDescription = null,
            tint = Color.Unspecified,
        )
    }
}

Looks good, right? The problem is when I try to focus on this button focus first goes to AndroidComposeView item (according to my GlobalFocusListener). And only my second action (click, D-Pad navigation) makes my content focused.

So, for some reason internal AndroidComposeView steals focus from my Content

是否有办法防止这种行为? 我只需要关注我的内容,而不是<代码”。 AndersComposeView summaryper.

Answer 1

这是一个众所周知的问题,将重点从意见书外移到意见书内,需要用户提供2个投入,而不是仅仅提供1个投入:

你们可以发挥延伸功能,利用用户提供的1份投入,将重点转移到儿童身上。

fun ComposeView.setFocusableContent(content: @Composable () -> Unit) {
    isFocusable = true
    isFocusableInTouchMode = true
    val focusRequester = FocusRequester()

    onFocusChangeListener = View.OnFocusChangeListener { _, hasFocus ->
        if (hasFocus) focusRequester.requestFocus()
    }

    setContent {
        Box(modifier = Modifier.focusRequester(focusRequester).focusGroup()) {
            content.invoke()
        }
    }
}

使用相当简单。现在,你可以使用<条码>,而不是使用<条码>。

binding.micBtn.setFocusableContent {
  // ...
}

Unrelated to the question

To react to focus changes in your component, you can make use of IconButton from androidx.tv.material3 library. By default, it changes color when the button is focused and it is easy to change the colors for different states (focused, pressed, etc.) using the colors parameter.

使用:

androidx.tv.material3.IconButton(onClick = { }) {
    Icon(
        Icons.Filled.Mic, 
        contentDescription = "Mic"
    )
}

Unrelated to the question

友情链接