Android 簡單實現Activity介面變暗效果
阿新 • • 發佈:2019-01-10
效果圖:
程式碼實現如下:
private void dimBackground(final float from, final float to) {
final Window window = getWindow();
ValueAnimator valueAnimator = ValueAnimator.ofFloat(from, to);
valueAnimator.setDuration(500);
valueAnimator.addUpdateListener(new AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
WindowManager.LayoutParams params = window.getAttributes();
params.alpha = (Float) animation.getAnimatedValue();
window.setAttributes(params);
}
});
valueAnimator.start();
}
變亮
dimBackground(0.5f,1.0f);
變暗
dimBackground(1.0f,0.5f);