安卓控件拖动和点击事件冲突处理----可拖动的FloatingActionButton

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直接上代码，具体为什么自行百度吧。额。。就是这么任性？
/** * Created by ${davidMa} on 2017/5/23. * com.aochuang.megstar.widget * 描述： * 公司：aochuang01 */public class MyFloatActionButton extends FloatingActionButton {    int dx, dy;    private int lastx, lasty;//记录手指按下去的位置    private int startX, startY, endX, endY;    private long startTime = 0;    private long endTime = 0;    private boolean isclick;    public MyFloatActionButton(Context context) {        super(context, null);    }    public MyFloatActionButton(Context context, AttributeSet attrs) {        super(context, attrs, 0);    }    public MyFloatActionButton(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        init();    }    public void init() {        setSaveEnabled(true);    }    @Override    protected Parcelable onSaveInstanceState() {        LogUtils.d("onSaveInstanceState satrtX=" + startX);        Parcelable superState = super.onSaveInstanceState();        SavedState ss = new SavedState(superState);        ss.state = startX;        return ss;    }    @Override    protected void onRestoreInstanceState(Parcelable state) {        LogUtils.d("onRestoreInstanceState satrtX" + ((SavedState) state).state);        super.onRestoreInstanceState(state);    }    @Override    public boolean dispatchTouchEvent(MotionEvent event) {        switch (event.getAction()) {            case MotionEvent.ACTION_DOWN:// 获取手指第一次接触屏幕                dx = 0;                dy = 0;                isclick = false;//当按下的时候设置isclick为false，具体原因看后边的讲解                startTime = System.currentTimeMillis();                break;            case MotionEvent.ACTION_MOVE:// 手指在屏幕上移动对应的事件                int x = (int) event.getRawX();                int y = (int) event.getRawY();                // 获取手指移动的距离                dx = x - lastx;                dy = y - lasty;                setAlpha(0.5f);                int l = getLeft();                int r = getRight();                int t = getTop();                int b = getBottom();                LogUtils.d("上面的位置是" + (l + dx) + "右边的坐标是" + (t + dy));                // 更改在窗体的位置//确保位置显示在屏幕内                if ((l + dx) >= 0 && (t + dy) > 0 && (r + dx) <= UIUtils.screenWidthPixels() && (b + dy) <= UIUtils.screenHeightPixels())                    layout(l + dx, t + dy, r + dx, b + dy);                // 获取移动后的位置                lastx = (int) event.getRawX();                lasty = (int) event.getRawY();                if (Math.abs(dx) > 20 || Math.abs(dy) > 20) {                    LogUtils.d("Math.abs(dx)>20");                    event.setAction(MotionEvent.ACTION_CANCEL);                    return true;                }            case MotionEvent.ACTION_UP:// 手指离开屏幕对应事件                // 记录最后图片在窗体的位置                endTime = System.currentTimeMillis();                //当从点击到弹起小于半秒的时候,则判断为点击,如果超过则不响应点击事件                if ((endTime - startTime) > 0.1 * 1000L) {                    isclick = true;                } else {                    isclick = false;                }                lastx = (int) event.getRawX();                lasty = (int) event.getRawY();                System.out.println("执行顺序up");                setAlpha(1.0f);        }        if (isclick)            return true;        return super.dispatchTouchEvent(event);    }    static class SavedState extends BaseSavedState {        public static final Parcelable.Creator<SavedState> CREATOR                = new Parcelable.Creator<SavedState>() {            @Override            public SavedState createFromParcel(Parcel source) {                return new SavedState(source);            }            public SavedState[] newArray(int size) {                return new SavedState[size];            }        };        int state;        SavedState(Parcelable superState) {            super(superState);        }        private SavedState(Parcel in) {            super(in);            state = in.readInt();        }        @Override        public void writeToParcel(Parcel out, int flags) {            super.writeToParcel(out, flags);            out.writeInt(state);        }    }}
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