Android开发学习笔记之改变对话框的透明度

AlertDialog alertDialog = new AlertDialog.Builder(this)

.setMessage("透明度对话框").setPositiveButton("确定", null).create();

Window window = alertDialog.getWindow();

WindowManager.LayoutParams lp = window.getAttributes();

lp.alpha = 0.7f; //alpha属性的范围0.0f~1.0f, 默认1.0f不透明

window.setAttributes(lp);

alertDialog.show();