可以拖拽的DragFloatImageView

public class DragFloatImageView extends AppCompatImageButton {

    private int parentHeight;
    private int parentWidth;
    private int lastX;
    private int lastY;
    private boolean isDrag;

    public DragFloatImageView(Context context) {
        super(context);
    }

    public DragFloatImageView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
    }

    public DragFloatImageView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        int rawX = (int) event.getRawX();
        int rawY = (int) event.getRawY();
        switch (event.getAction() & MotionEvent.ACTION_MASK) {
            case MotionEvent.ACTION_DOWN:
                setPressed(true);
                isDrag = false;
                getParent().requestDisallowInterceptTouchEvent(true);
                lastX = rawX;
                lastY = rawY;
                ViewGroup parent;
                if (getParent() != null) {
                    parent = (ViewGroup) getParent();
                    parentHeight = parent.getHeight();
                    parentWidth = parent.getWidth();
                }
                break;
            case MotionEvent.ACTION_MOVE:
                LogUtil.e("移动");
                if (parentHeight <= 0 || parentWidth == 0) {
                    isDrag = false;
                    break;
                } else {
                    isDrag = true;
                }
                int dx = rawX - lastX;
                int dy = rawY - lastY;
                //这里修复一些手机无法触发点击事件
                int distance = (int) Math.sqrt(dx * dx + dy * dy);
                if (distance < 3) {
                    isDrag = false;
                    break;
                }
                float x = getX() + dx;
                float y = getY() + dy;
                //检测是否到达边缘，左上右下
                x = x < 0 ? 0 : x > parentWidth - getWidth() ? parentWidth - getWidth() : x;
                y = getY() < 0 ? 0 : getY() + getHeight() > parentHeight ? parentHeight - getHeight() : y;
                setX(x);
                setY(y);
                lastX = rawX;
                lastY = rawY;
                break;
            case MotionEvent.ACTION_UP:
                if (!isNotDrag()) {
                    setPressed(false);
                    if (rawX >= parentWidth / 2) {
                        //靠右吸附
                       // ObjectAnimator oa = ObjectAnimator.ofFloat(this, "x", lastX, parentWidth - getWidth());
                        ObjectAnimator oa = ObjectAnimator.ofFloat(this, "x", getX(), parentWidth - getWidth());
                        oa.setInterpolator(new DecelerateInterpolator());
                        oa.setDuration(500);
                        oa.start();

                        /*animate().setInterpolator(new BounceInterpolator())
                                .setDuration(500)
                                .xBy(parentWidth - getWidth() - getX())
                                .start();*///弹几下得效果
                    } else {
                        //靠左吸附
                        ObjectAnimator oa = ObjectAnimator.ofFloat(this, "x", getX(), 0);
                        oa.setInterpolator(new DecelerateInterpolator());
                        oa.setDuration(500);
                        oa.start();

                    }
                }
                break;
        }
        return !isNotDrag() || super.onTouchEvent(event);
    }

    private boolean isNotDrag() {
        return !isDrag && (getX() == 0
                || (getX() == parentWidth - getWidth()));
    }

}

 

在xml使用

android:id="@+id/textView_inquire"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_marginBottom="12dp"
android:layout_marginRight="12dp"
android:background="@drawable/icon_company_inquire"
android:visibility="gone" />