android– 如何在视图寻呼机上拖动浮动 *** 作按钮

概述在这里,我有一个由多个片段共享的视图寻呼机,它们都包含在TABLayout中,如下所示<RelativeLayoutandroid:layout_width="match_parent"android:layout_height="match_parent"xmlns:app="http://schemas.android.com/apkes-auto"android:orientation="vertical&q

在这里,我有一个由多个片段共享的视图寻呼机,它们都包含在TABLayout中,如下所示

<relativeLayoutandroID:layout_wIDth="match_parent"androID:layout_height="match_parent"xmlns:app="http://schemas.androID.com/apk/res-auto"androID:orIEntation="vertical"xmlns:androID="http://schemas.androID.com/apk/res/androID">    <androID.support.v7.Widget.Toolbar    androID:ID="@+ID/toolbar"    androID:layout_wIDth="match_parent"    androID:layout_height="?attr/actionbarSize"    androID:background="#006699"    androID:TitleTextcolor="#FFFFFF"    app:popuptheme="@style/Apptheme.PopupOverlay" />    <androID.support.design.Widget.TabLayout    androID:ID="@+ID/tab_layout"    androID:layout_wIDth="match_parent"    androID:layout_height="wrap_content"    androID:layout_below="@+ID/toolbar"    androID:background="#006699"    androID:elevation="6dp"    androID:minHeight="?attr/actionbarSize"    androID:theme="@style/themeOverlay.AppCompat.Dark.Actionbar"/><androID.support.v4.vIEw.VIEwPager    androID:ID="@+ID/pager"    androID:layout_wIDth="match_parent"    androID:layout_height="fill_parent"    androID:layout_below="@ID/tab_layout"/><androID.support.design.Widget.floatingActionbuttonandroID:ID="@+ID/order_icon"androID:layout_wIDth="59dp"androID:layout_height="59dp"androID:visibility="visible"androID:layout_gravity="right|bottom"app:layout_anchor="@ID/pager"app:layout_anchorGravity="bottom|right|end"androID:src="@drawable/order_icon"androID:layout_alignBottom="@+ID/pager"androID:layout_alignParentRight="true"androID:layout_alignParentEnd="true" /></relativeLayout>

FAB由所有片段共享.我想在FAB上添加一个onLongClickListener,我可以通过它在布局上拖动按钮(包括vIEwPager).
我使用ontouchListener和MotionEvent对象完成了上述任务.
但是,我无法使用拖放API(释放拖动按钮后按钮消失).

这是代码：

    orderIcon = (floatingActionbutton)findVIEwByID(R.ID.order_icon);    orderIcon.setTag(IMAGEVIEW_TAG);    // Sets a long click Listener for the ImageVIEw    orderIcon.setonLongClickListener(new VIEw.OnLongClickListener() {     @OverrIDe     public boolean onLongClick(VIEw v) {         ClipData.Item item = new ClipData.Item((CharSequence) v                 .getTag());         String[] mimeTypes = { ClipDescription.MIMETYPE_TEXT_PLAIN };         ClipData clipData = ClipData.newPlainText("", "");         VIEw.DragShadowBuilder myShadow = new VIEw.DragShadowBuilder(vIEw);                             // Starts the drag         v.startDrag(clipData,myShadow,null,0);         return true;       }       });       orderIcon.setonDragListener(new VIEw.OnDragListener() {       @Suppresslint("NewAPI")       @OverrIDe       public boolean onDrag(VIEw v, DragEvent event) {         switch (event.getAction()) {             case DragEvent.ACTION_DRAG_STARTED:                 owner = (VIEwGroup) v.getParent();                 owner.removeVIEw(v);                 Log.d(msg, "Action is DragEvent.ACTION_DRAG_STARTED");                 break;             case DragEvent.ACTION_DRAG_ENTERED:                 Log.d(msg, "Action is DragEvent.ACTION_DRAG_ENTERED");                 float x = (int) event.getX();                 float y = (int) event.getY();                 break;             case DragEvent.ACTION_DRAG_EXITED:                  Log.d(msg, "Action is DragEvent.ACTION_DRAG_EXITED");                  x = (float) event.getX();                  y = (float) event.getY();                  v.setX(x);                  v.setY(y);                  owner.addVIEw(v);                  v.setVisibility(VIEw.VISIBLE);                  break;             case DragEvent.ACTION_DRAG_LOCATION:                 Log.d(msg, "Action is DragEvent.ACTION_DRAG_LOCATION");                 break;             case DragEvent.ACTION_DRAG_ENDED:                 Log.d(msg, "Action is DragEvent.ACTION_DRAG_ENDED");                 break;             case DragEvent.ACTION_DROP:                 Log.d(msg, "ACTION_DROP event");                 break;             default:                 break;           }         return true;        }     });

任何回复都将受到高度赞赏.先感谢您.

解决方法:

试试这个,

1)声明变量.

    float dX;    float dY;    int lastAction;

2)在java类中获取视图,

fab = (floatingActionbutton) findVIEwByID(R.ID.floatingActionbutton);

3)然后为您的视图编写以下代码,

fab.setontouchListener(new VIEw.OntouchListener() {            @OverrIDe            public boolean ontouch(VIEw vIEw, MotionEvent event) {                switch (event.getActionMasked()) {                    case MotionEvent.ACTION_DOWN:                        dX = vIEw.getX() - event.getRawX();                        dY = vIEw.getY() - event.getRawY();                        lastAction = MotionEvent.ACTION_DOWN;                        break;                    case MotionEvent.ACTION_MOVE:                        vIEw.setY(event.getRawY() + dY);                        vIEw.setX(event.getRawX() + dX);                        lastAction = MotionEvent.ACTION_MOVE;                        break;                    case MotionEvent.ACTION_UP:                        if (lastAction == MotionEvent.ACTION_DOWN)                            Toast.makeText(this, "Clicked!", Toast.LENGTH_SHORT).show();                        break;                        default:                        return false;                }                return true;            }        });

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