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Custom view object using up full height of screen even when layout_height is set to wrap_content

开发者 https://www.devze.com 2023-01-10 17:38 出处:网络
I created an object that extends android.view.View, overriding draw() and have it displaying on the screen. To put you in the picture, it is a display of digits to represent a game score. It\'s displa

I created an object that extends android.view.View, overriding draw() and have it displaying on the screen. To put you in the picture, it is a display of digits to represent a game score. It's displaying correctly horizontally, however, it is taking up the full height开发者_StackOverflow社区 of the screen - pushing all other elements off the screen.

I've put layout_height="wrap_content" in the xml, but it has no effect.

Does anyone know what I am doing wrong?


I've figured it out...

I was supposed to override onDraw() but that wasn't what caused the problem.

The main thing was, I needed to override onMeasure() like this:

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    setMeasuredDimension(DIGIT_WIDTH * getNumberOfDigits(), DIGIT_HEIGHT);
}

DIGIT_WIDTH and DIGIT_HEIGHT are constants set to the dimensions of each digit image I used. getNumberOfDigits() is just a getter for a custom property set from the xml attributes.

Hope that helps anyone else coming across this.

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