问题描述
关注这个问题 RecyclerView ItemTouchHelper Buttons on Swipe （不一样）。我想在每一侧添加按钮。
该链接的官方答案仅适用于一侧。
我尝试过的：
public abstract class SwipeHelper extends itemtouchhelper.SimpleCallback {
public static final int BUTTON_WIDTH = 125;
private RecyclerView recyclerView;
private List<UnderlayButton> buttons;
private GestureDetector gestureDetector;
private GestureDetector gestureDetector2;
private int swipedPos = -1;
private float swipeThreshold = 0.5f;
private Map<Integer,List<UnderlayButton>> buttonsBuffer;
private Queue<Integer> recoverQueue;
private GestureDetector.SimpleOnGestureListener gestureListener = new GestureDetector.SimpleOnGestureListener(){
@Override
public boolean onSingleTapConfirmed(MotionEvent e) {
for (UnderlayButton button : buttons){
if(button.onClick(e.getX(),e.getY()))
break;
}
return true;
}
};
private GestureDetector.SimpleOnGestureListener gestureListener2 = new GestureDetector.SimpleOnGestureListener(){
@Override
public boolean onSingleTapConfirmed(MotionEvent e) {
for (UnderlayButton button : buttons){
if(button.onClick2(e.getX(),e.getY()))
break;
}
return true;
}
};
private View.OnTouchListener onTouchListener = new View.OnTouchListener() {
@Override
public boolean onTouch(View view,MotionEvent e) {
if (swipedPos < 0) return false;
Point point = new Point((int) e.getRawX(),(int) e.getRawY());
RecyclerView.ViewHolder swipedViewHolder = recyclerView.findViewHolderForAdapterPosition(swipedPos);
View swipedItem = swipedViewHolder.itemView;
Rect rect = new Rect();
swipedItem.getGlobalVisibleRect(rect);
if (e.getAction() == MotionEvent.ACTION_DOWN || e.getAction() == MotionEvent.ACTION_UP ||e.getAction() == MotionEvent.ACTION_MOVE) {
if (rect.top < point.y && rect.bottom > point.y) {
gestureDetector.onTouchEvent(e);
gestureDetector2.onTouchEvent(e);
}
//else if(rect.top > point.y && rect.bottom < point.y){ }
else {
recoverQueue.add(swipedPos);
swipedPos = -1;
recoverSwipedItem();
}
}
return false;
}
};
public SwipeHelper(Context context,RecyclerView recyclerView) {
super(0,itemtouchhelper.LEFT | itemtouchhelper.RIGHT);
this.recyclerView = recyclerView;
this.buttons = new ArrayList<>();
this.gestureDetector = new GestureDetector(context,gestureListener);
this.gestureDetector2 = new GestureDetector(context,gestureListener2);
this.recyclerView.setonTouchListener(onTouchListener);
buttonsBuffer = new HashMap<>();
recoverQueue = new LinkedList<Integer>(){
@Override
public boolean add(Integer o) {
if (contains(o))
return false;
else
return super.add(o);
}
};
attachSwipe();
}
@Override
public boolean onMove(RecyclerView recyclerView,RecyclerView.ViewHolder viewHolder,RecyclerView.ViewHolder target) {
return false;
}
@Override
public void onSwiped(RecyclerView.ViewHolder viewHolder,int direction) {
int pos = viewHolder.getAdapterPosition();
if (swipedPos != pos)
recoverQueue.add(swipedPos);
swipedPos = pos;
if (buttonsBuffer.containsKey(swipedPos))
buttons = buttonsBuffer.get(swipedPos);
else
buttons.clear();
buttonsBuffer.clear();
swipeThreshold = 0.5f * buttons.size() * BUTTON_WIDTH;
recoverSwipedItem();
}
@Override
public float getSwipeThreshold(RecyclerView.ViewHolder viewHolder) {
return swipeThreshold;
}
@Override
public float getSwipeEscapeVeLocity(float defaultValue) {
return 0.1f * defaultValue;
}
@Override
public float getSwipeVeLocityThreshold(float defaultValue) {
return 5.0f * defaultValue;
}
@Override
public void onChildDraw(Canvas c,RecyclerView recyclerView,float dX,float dY,int actionState,boolean isCurrentlyActive) {
int pos = viewHolder.getAdapterPosition();
float translationX = dX;
View itemView = viewHolder.itemView;
if (pos < 0){
swipedPos = pos;
return;
}
if(actionState == itemtouchhelper.ACTION_STATE_SWIPE){
if(dX < 0) {
List<UnderlayButton> buffer = new ArrayList<>();
if (!buttonsBuffer.containsKey(pos)){
instantiateUnderlayButton(viewHolder,buffer);
buttonsBuffer.put(pos,buffer);
}
else {
buffer = buttonsBuffer.get(pos);
}
translationX = dX * buffer.size() * BUTTON_WIDTH / itemView.getWidth();
drawButtons(c,itemView,buffer,pos,translationX);
}
if(dX > 0) {
List<UnderlayButton> buffer = new ArrayList<>();
if (!buttonsBuffer.containsKey(pos)){
instantiateUnderlayButton(viewHolder,translationX);
}
}
super.onChildDraw(c,recyclerView,viewHolder,translationX,dY,actionState,isCurrentlyActive);
}
private synchronized void recoverSwipedItem(){
while (!recoverQueue.isEmpty()){
int pos = recoverQueue.poll();
if (pos > -1) {
recyclerView.getAdapter().notifyItemChanged(pos);
}
}
}
private void drawButtons(Canvas c,View itemView,List<UnderlayButton> buffer,int pos,float dX) {
float right = itemView.getRight();
float left = itemView.getLeft();
float dButtonWidth = (-1) * dX / buffer.size();
for (UnderlayButton button : buffer) {
if (dX < 0) {
left = right - dButtonWidth;
button.onDraw(
c,new RectF(
left,itemView.getTop(),right,itemView.getBottom()
),dX
);
right = left;
} else if (dX > 0) {
right = left - dButtonWidth;
button.onDraw(c,new RectF(
right,left,dX
);
left = right;
}
}
}
public void attachSwipe(){
itemtouchhelper itemtouchhelper = new itemtouchhelper(this);
itemtouchhelper.attachToRecyclerView(recyclerView);
}
public abstract void instantiateUnderlayButton(RecyclerView.ViewHolder viewHolder,List<UnderlayButton> underlayButtons);
public static class UnderlayButton {
private String text;
private int imageResId;
private int color;
private UnderlayButtonClickListener clickListener;
private String text2;
private int imageResId2;
private int color2;
private UnderlayButtonClickListener2 clickListener2;
private RectF clickRegion;
private RectF clickRegion2;
private int pos;
public UnderlayButton(String text,int imageResId,int color,UnderlayButtonClickListener clickListener,String text2,int imageResId2,int color2,UnderlayButtonClickListener2 clickListener2) {
this.text = text;
this.imageResId = imageResId;
this.color = color;
this.clickListener = clickListener;
this.text2 = text2;
this.imageResId2 = imageResId2;
this.color2 = color2;
this.clickListener2 = clickListener2;
}
public boolean onClick(float x,float y){
if (clickRegion != null && clickRegion.contains(x,y)){
clickListener.onClick(pos);
return true;
}
return false;
}
public boolean onClick2(float x,float y){
if (clickRegion2 != null && clickRegion2.contains(x,y)){
clickListener2.onClick(pos);
return true;
}
return false;
}
public void onDraw(Canvas c,RectF rect,float dX) {
Paint p = new Paint();
// Draw background
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
if (dX < 0) {
//Boton derecho
c.drawRect(rect,p);
p.setColor(color);
}
else{
//Boton Izquierdo
p.setColor(color2);
c.drawRect(rect,p);
}
clickRegion = rect;
clickRegion2 = rect;
this.pos = pos;
}
}
}
public interface UnderlayButtonClickListener {
void onClick(int pos);
}
public interface UnderlayButtonClickListener2 {
void onClick(int pos);
}}
我尝试向“UnderlayButton”类添加更多参数，因为在我尝试分别使用这两个类之前，它给我带来了 OnClickListener 问题。
所以我发现的最好方法是在“UnderlayButton”类中添加额外的参数。不过，它对我不起作用。
有人可以帮我吗。
解决方法
暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！
如果你已经找到好的解决方法，欢迎将解决方案带上本链接一起发送给小编。
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