Create window display in Android:service

Windowmanager.layoutparams:

int type_system_alert window Type:system window, such as Low power alert. (System form, such as lower battery warning prompt box)
int type_system_overlay Window type:system OVERLAY windows, which need to being displayed on top of everything Els E. (System overlay form, which needs to be displayed in the top)

The difference between Type_system_alert and Type_system_overlay

System_alert window can get focus, response action

When the System_overlay window is displayed, the focus is on the activity behind, and you can still manipulate the activity behind it.

The appropriate permission is required in the manifest file manifest

<uses-permission android:name= "Android.permission.SYSTEM_ALERT_WINDOW"/>
<uses-permission android:name= "Android.permission.SYSTEM_OVERLAY_WINDOW"/>

The following two ways of displaying windows do not fire the OnPause () event of the current activity.

1. seivece Create a form

1 Private voidShowsystemdialog () {2     /*Create UI Dialog*/   3View v = view.inflate (Mcontext, R.layout.serveice_dialog,NULL); 4Alertdialog.builder Alertdialog =NewAlertdialog.builder (Mcontext); 5 Alertdialog.setview (v); 6Dialog =alertdialog.create (); 7 Dialog.getwindow (). SetType (WindowManager.LayoutParams.TYPE_SYSTEM_ALERT); 8     //Dialog.getwindow (). SetType (WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY); 9 dialog.show (); Ten     Note dialog After the Show method is executed, you can adjust the size of the dialog and update the data * * * * One     /*set Size & POS*/   AWindowmanager.layoutparams LP =Dialog.getwindow (). GetAttributes ();  -WindowManager WM =(WindowManager) Getsystemservice (Window_service);  -Display display =Wm.getdefaultdisplay ();  the     if(Display.getheight () >display.getwidth ()) {   -         //lp.height = (int) (Display.getheight () * 0.5);  -Lp.width = (int) (Display.getwidth () * 1.0);  -}Else {   +         //lp.height = (int) (Display.getheight () * 0.75);  -Lp.width = (int) (Display.getwidth () * 0.5);  +     }   A D.getwindow (). SetAttributes (LP);  at            -     /*Update UI Data*/   -LV =(ListView) D.getwindow (). Findviewbyid (R.id.listview);  -Simpleadapter adapter =NewSimpleadapter (Mcontext, Getlistdata (), R.layout.list_item, -                             Newstring[]{"Item_text", "item_img"},                 -                             New int[]{r.id.item_text, r.id.item_img}];  in Lv.setadapter (adapter);  -            to     /*Set Listener*/   +Lv.setonitemclicklistener (NewOnitemclicklistener () { -          Public voidOnitemclick (adapterview<?> Parent, view view,intPos, the                 LongID) { * D.dismiss ();  $         }  Panax Notoginseng     });  -        the}

2. Directly use Windowmanager.addview () to display the window directly in the background

1Layoutinflater Inflater =(Layoutinflater) Getsystemservice (context.layout_inflater_service);2Mdesktoplayout = Inflater.inflate (R.layout.volume_panel,NULL);3  //Get System Form4Mwindowmanager =(WindowManager) Getapplicationcontext (). Getsystemservice (Window_service);5  //layout styles for forms6Mlayoutparams =Newwindowmanager.layoutparams ();7  //Set the form display Type ――type_system_alert (System tip)8Mlayoutparams.type =WindowManager.LayoutParams.TYPE_SYSTEM_ALERT;9  //set the form focus and touch:Ten  //flag_not_focusable (Cannot get key input focus) OneMlayoutparams.flags =WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE; A  //Set the display mode -Mlayoutparams.format =pixelformat.rgba_8888; -  //to set the alignment method themlayoutparams.gravity = Gravity.top |Gravity.left; -  //Set form width and height -Mlayoutparams.width =WindowManager.LayoutParams.WRAP_CONTENT; -Mlayoutparams.height =WindowManager.LayoutParams.WRAP_CONTENT; +  //set the position of the form to display otherwise in the center of the screen -Mlayoutparams.x = 50; +Mlayoutparams.y = 50; AMwindowmanager.addview (Mdesktoplayout, mlayoutparams);

Create window display in Android:service