Android remains at the top of the floating window

Today, we found that some software can display some floating small windows on the android desktop. After some searches, we finally found a solution,CodeAs follows:

 

 

Floatingfunc. Java

 

Package hrxcframe. Comm;

Import Android. App. activity;
Import Android. content. context;
Import Android. Graphics. rect;
Import Android. Test. R;
Import Android. util. log;
Import Android. View. gravity;
Import Android. View. layoutinflater;
Import Android. View. motionevent;
Import Android. View. view;
Import Android. View. window;
Import Android. View. windowmanager;
Import Android. View. windowmanager. layoutparams;

/**
* The floating menu is always displayed at the top of the android screen.
*
* @ Author liujl V1.0 you need to add <uses-Permission
* Android: Name = "android. Permission. system_alert_window"
*/> <! -- System pop-up window permission --> permission, otherwise an error will be reported
*/
Public class floatingfunc {
/**
* X coordinates of floating windows on the screen
*/
Private Static float x = 0;
/**
* Y coordinates of floating windows on the screen
*/
Private Static float y = 200;
/**
* Screen touch status, not used for the moment
*/
Private Static float state = 0;
/**
* Start position of the mouse touch
*/
Private Static float mtouchstartx = 0;
/**
* Mouse touch end position
*/
Private Static float mtouchstarty = 0;
/**
* Windows Window Manager
*/
Private Static windowmanager WM = NULL;

/**
* Floating display object
*/
Private Static view floatingviewobj = NULL;

/**
* Parameter setting class
*/
Public static windowmanager. layoutparams Params = new windowmanager. layoutparams ();
Public static int tool_bar_high = 0;
/**
* Objects to be displayed at the beginning of the window
*/
Private Static view view_obj = NULL;

/**
* Method to display at the beginning of the window
*
* @ Param Context
* Call the context getapplicationcontext () object ()
* @ Param window
* Call the window getwindow () object ()
* @ Param floatingviewobj
* Floating object view to be displayed
*/
Public static void show (context, window, view floatingviewobj ){
// Load the sample code of the style in the XML file
// ******************************** Start ***** *********************
// Layoutinflater Inflater =
// Layoutinflater. From (getapplicationcontext ());
// View = Inflater. Inflate (R. layout. topframe, null );
// WM =
// (Windowmanager) Context. getapplicationcontext (). getsystemservice (context. window_service );
// Load the sample code of the style in the XML file
// ********************************* End **** ***********************
//
// Close the floating display object and then display it again
Close (context );
Floatingfunc. floatingviewobj = floatingviewobj;

View_obj = floatingviewobj;
Rect frame = new rect ();
// This sentence is the key to display it on the top layer
// Getwindow ()
Window. getdecorview (). getwindowvisibledisplayframe (FRAME );
Tool_bar_high = frame. Top;

WM = (windowmanager) Context // getapplicationcontext ()
. getsystemservice (activity. window_service);
Params. type = windowmanager. layoutparams. type_system_alert
| windowmanager. layoutparams. type_system_overlay;
Params. flags = layoutparams. flag_not_touch_modal
| layoutparams. flag_not_focusable;

// Set the long and wide data of the floating window
Params. width = windowmanager. layoutparams. wrap_content;
Params. Height = windowmanager. layoutparams. wrap_content;
// Sets the transparency.
Params. Alpha = 80;
// Set the internal text alignment
Params. Gravity = gravity. Left | gravity. Top;

// Set the initial values of X and Y to the starting point in the upper left corner of the screen
Params. x = (INT) X;
Params. Y = (INT) y;
// TV = new mytextview (topframe. This );
WM. addview (floatingviewobj, Params );

}

/**
* Follow whom to move
*
* @ Param event
* Event object
* @ Param View
* Pop-up object instance (view)
* @ Return
*/
Public static Boolean ontouchevent (motionevent event, view ){

// Obtain the coordinates of the relative screen, that is, starting from the upper-left corner of the screen
X = event. getrawx ();
Y = event. getrawy ()-25; // 25 indicates the height of the system status bar.
Log. I ("currp", "currx" + x + "=== Curry" + Y); // debug information
Switch (event. getaction ()){
Case motionevent. action_down:
State = motionevent. action_down;
// Pantime ();
// Obtain the coordinates of the relative view, that is, the upper-left corner of the view is the origin.
Mtouchstartx = event. getx ();
Mtouchstarty = event. Gety ();
Log. I ("startp", "startx" + mtouchstartx + "=== starty"
+ Mtouchstarty); // debug information

Break;
Case motionevent. action_move:
State = motionevent. action_move;
Updateviewposition (View );
Break;

Case motionevent. action_up:
State = motionevent. action_up;
Updateviewposition (View );
Mtouchstartx = mtouchstarty = 0;
Break;
}
Return true;
}

/**
* Disable floating display objects
*/
Public static void close (context ){

If (view_obj! = NULL & view_obj.isshown () {
windowmanager WM = (windowmanager) Context
. getsystemservice (activity. window_service);
WM. removeview (view_obj);
}< BR >}

/**
* Update the position of the pop-up window
*/
Private Static void updateviewposition (view ){
// Update the floating window position Parameter
Params. x = (INT) (X-mtouchstartx );
Params. Y = (INT) (Y-mtouchstarty );
WM. updateviewlayout (floatingfunc. floatingviewobj, Params );
}

}

 

 

 

Test code, which can be placed in any activity code. You can drag it by hand.

 

Final textview TV = new textview (getapplicationcontext ());
TV. settext ("http://www.my400800.cn ");
View. setontouchlistener (New View. ontouchlistener (){

@ Override
Public Boolean ontouch (view arg0, motionevent arg1 ){
Floatingfunc. ontouchevent (arg1, TV );
Return true;
}
});

 

 

The effect is as follows:

 

Note:

 

Must be added in androidmanifest. xml

<Uses-Permission Android: Name = "android. Permission. system_alert_window"/>

System permission. Otherwise, an error occurs .............