android 实现表格上下滑，左右滑，并且标题也跟着滑

android 实现表格上下滑，左右滑，并且标题也跟着滑

效果图

思路

图片

滑动方式主要是两个RecyclerView联动和HorizontalScrollView随RecyclerView滑动。

关键是把滑动事件交给SingleOrientationView去处理。在SingleOrientationView的dispatchTouchEvent方法中，将手指滑动的路径模拟成单一方向（水平或竖直）的滑动事件，将此事件交给RecyclerView去处理。

SingleOrientationView的代码如下：

public class SingleOrientationView extends FrameLayout {

private int mScaledTouchSlop;
private float startX;
private float startY;
private float currentX;
private float currentY;
/**
* 0: 默认   1：水平    2：竖直
* */
private int type = 0;
private View[] mViews;

public SingleOrientationView(Context context) {
super(context);
initTouchSlop(context);
}

public SingleOrientationView(Context context, AttributeSet attributeSet) {
super(context, attributeSet);
initTouchSlop(context);
}

public SingleOrientationView(Context context, AttributeSet attributeSet, int defStyleAttr) {
super(context, attributeSet, defStyleAttr);
initTouchSlop(context);
}

@RequiresApi(api = 21)
public SingleOrientationView(Context context, AttributeSet attributeSet, int defStyleAttr, int defStyleRes) {
super(context, attributeSet, defStyleAttr, defStyleRes);
initTouchSlop(context);
}

private void initTouchSlop(Context context) {
this.mScaledTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
}

private MotionEvent getMotionEvent(MotionEvent motionEvent) {
if (type == 1)
return MotionEven
4000
t.obtain(motionEvent.getDownTime(),
motionEvent.getEventTime(), motionEvent.getAction(), motionEvent.getX(), currentY, motionEvent.getMetaState());
else
return MotionEvent.obtain(motionEvent.getDownTime(),
motionEvent.getEventTime(), motionEvent.getAction(), currentX, motionEvent.getY(), motionEvent.getMetaState());
}

public boolean dispatchTouchEvent(MotionEvent motionEvent) {
MotionEvent targetMotionEvent = null;
switch (motionEvent.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
startX = motionEvent.getX();
startY = motionEvent.getY();
targetMotionEvent = motionEvent;
break;
case MotionEvent.ACTION_MOVE:
if(type == 0){
currentX = motionEvent.getX();
currentY = motionEvent.getY();
float f1 = currentX - startX;
float f2 = currentY - startY;
if(Math.abs(f1) > mScaledTouchSlop || Math.abs(f2) > mScaledTouchSlop){
if (Math.abs(f1) > Math.abs(f2)){
type = 1;
targetMotionEvent = getMotionEvent(motionEvent);
} else {
type = 2;
targetMotionEvent = getMotionEvent(motionEvent);
}
}else {
targetMotionEvent = motionEvent;
}
}else if(type == 1){
targetMotionEvent = getMotionEvent(motionEvent);
}else {
targetMotionEvent = getMotionEvent(motionEvent);
}
break;
case MotionEvent.ACTION_UP:
type = 0;
targetMotionEvent = motionEvent;
break;
case MotionEvent.ACTION_CANCEL:
type = 0;
targetMotionEvent = motionEvent;
break;
default:
}
for(int i = 0; i < mViews.length; i++){
mViews[i].dispatchTouchEvent(targetMotionEvent);
}
return true;
}

public void SyncViews(View[] views) {
this.mViews = views;
}
}

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