Dialog 设置透明度和背景亮度

设置透明度(貌似是dialog自身的透明度)

WindowManager.LayoutParams lp=dialog.getWindow().getAttributes();
lp.alpha=1.0f;
dialog.getWindow().setAttributes(lp);

alpha在0.0f到1.0f之间。1.0完全不透明,0.0f完全透明


设置黑暗度

WindowManager.LayoutParams lp=dialog.getWindow().getAttributes();
lp.dimAmount=1.0f;
dialog.getWindow().setAttributes(lp);
//dialog.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);

dimAmount在0.0f和1.0f之间,0.0f完全不暗,1.0f全暗

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