android dialog translucent background disappears

Recently, encountered a dialog translucent background disappears problem, background requirements are custom dialog implement warning prompt box:

Initialize Warning Popup alertdialog = new Empalertview (context, utils.getidbyname (context, "style", "Alert_style")); Alertdialog.setcanceledontouchoutside (FALSE); Layoutinflater Inflater = (layoutinflater) context.getsystemservice (context.layout_inflater_service); LAYOUT = Inflater.inflate (Utils.getidbyname (Context, "layout", "Alertview"), null); Layout.setlayoutparams (New Layoutparams ( Layoutparams.match_parent, layoutparams.wrap_content));//Set translucent background window window = Alertdialog.getwindow (); Windowmanager.layoutparams LP = Window.getattributes (); Lp.alpha = 0.9f;window.setattributes (LP); Alertdialog.setcontentview (layout);

Make the page operation and user prompt, all show normal,

When you press the power button on the screen and light up the screen again, it turns out that the dialog translucent gray background disappears ...

Workaround: Set Window.addflags (WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED) and modify the following:

Initialize Warning Popup alertdialog = new Empalertview (context, utils.getidbyname (context, "style", "Alert_style")); Alertdialog.setcanceledontouchoutside (FALSE); Layoutinflater Inflater = (layoutinflater) context.getsystemservice (context.layout_inflater_service); LAYOUT = Inflater.inflate (Utils.getidbyname (Context, "layout", "Alertview"), null); Layout.setlayoutparams (New Layoutparams ( Layoutparams.match_parent, layoutparams.wrap_content)); window window = Alertdialog.getwindow (); Windowmanager.layoutparams LP = Window.getattributes (); Lp.alpha = 0.9f;window.setattributes (LP);//prevent pressing and re-opening the screen power, The original darkening background turns white window.addflags (WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED); Alertdialog.setcontentview (layout) ;

Android dialog translucent background disappears