Android customization can drag view, interface rendering refresh will not automatically return to the start position

Take a custom ImageView example:

/*** Can be dragged ImageView* Created by admin on 2017/2/21. */public class Floatingimageview extends imageview{public Floatingimageview (context context) {super (context);    } public Floatingimageview (context context, AttributeSet Attrs) {Super (context, attrs); } public Floatingimageview (context context, AttributeSet attrs, int defstyleattr) {Super (context, Attrs, defsty    LEATTR); } @TargetApi (Build.version_codes.LOLLIPOP) Public Floatingimageview (context context, AttributeSet attrs, int defstyleattr, int defstyleres) {Super (conte    XT, Attrs, Defstyleattr, defstyleres);    } int StartX;    int starty;    int left;    int top;    int[] temp = new int[]{0, 0};        @Override public boolean ontouchevent (Motionevent event) {Boolean ismove = false;        int x = (int) event.getrawx ();        int y = (int) Event.getrawy (); Switch (event.getaction ()) {case Motionevent.Action_down://Touch down so check if the StartX = x;                Starty = y;                TEMP[0] = (int) event.getx ();                TEMP[1] = Y-gettop ();            Break Case Motionevent.Action_move://Touch drag with the ball left = x-temp[0];                top = y-temp[1];                if (left < 0) {//The control of the Ieft border does not exceed the leftmost = 0;            } layout (left, top, left + getwidth (), Top + getheight ());//free drag to break; Case Motionevent.action_up: if (Math.Abs (X-STARTX) > 2 | |                    Math.Abs (Y-starty) > 2) {//To determine whether to move, then a certain range is not a move, to resolve the triggering event conflict//will drag the last position to set down, otherwise the page refresh after rendering the button will automatically return to the original position                    Note The parent container relativelayout.layoutparams LP = (relativelayout.layoutparams) getlayoutparams ();                    Lp.setmargins (left, top,0,0);                    SETLAYOUTPARAMS (LP);                 OK is drag ismove = true;        } break; } return Ismove?     True:super.onTouchEvent (event); }}

Android customization can drag view, interface rendering refresh will not automatically return to the start position