Question

我在查找从RelativeLayout中心转换ImageView的解决方案时遇到问题，其方式是ImageView的左上角保留在布局的左上角。大多数选项都将ImageView的中心转换为参考和/或在所有屏幕尺寸上都不能正常工作。

到目前为止，这是最好的选项，除了ImageView的中心位于布局的左上角（0,0）这一事实：

TranslateAnimation anim = new TranslateAnimation(
    TranslateAnimation.RELATIVE_TO_PARENT,0.0f,
    TranslateAnimation.RELATIVE_TO_PARENT,-0.5f,
    TranslateAnimation.RELATIVE_TO_PARENT,0.0f,
    TranslateAnimation.RELATIVE_TO_PARENT,-0.5f
);
anim.setFillAfter(true);
anim.setDuration(1000);

image.startAnimation(anim);

Answer 1

您可以尝试使用TranslateAnimation.ABSOLUTE。通过这种方式，您可以更精确地计算增量值。

RelativeLayout relativeLayout = (RelativeLayout) findViewById(<R.id of your relative layout id>);
ImageView imageView = (ImageView) findViewById(<R.id of your image view id>);

int deltaX = (relativeLayout.getWidth() / 2) - (imageView.getWidth() / 2);
int deltaY = (relativeLayout.getHeight() / 2) - (imageView.getHeight() / 2);

TranslateAnimation anim = new TranslateAnimation(
    TranslateAnimation.ABSOLUTE, 0.0f, 
    TranslateAnimation.ABSOLUTE, -deltaX,
    TranslateAnimation.ABSOLUTE, 0.0f,
    TranslateAnimation.ABSOLUTE, -deltaY
);
anim.setFillAfter(true);
anim.setDuration(1000);

image.startAnimation(anim);

将ImageView转换为左上角

1 个答案: