Android 在“回收器”视图中刷回后,无法清除“部分刷卡删除”按钮
我正在尝试在我的应用程序中创建类似gmail的滑动动作的存档 我能够在滑动时绘制图像和文本。但问题是在向后滑动后,删除按钮图像没有被删除 如何在滑回后删除删除按钮。我不知道我的代码有什么问题Android 在“回收器”视图中刷回后,无法清除“部分刷卡删除”按钮,android,android-recyclerview,recyclerview-layout,itemtouchhelper,Android,Android Recyclerview,Recyclerview Layout,Itemtouchhelper,我正在尝试在我的应用程序中创建类似gmail的滑动动作的存档 我能够在滑动时绘制图像和文本。但问题是在向后滑动后,删除按钮图像没有被删除 如何在滑回后删除删除按钮。我不知道我的代码有什么问题 class SwipeController extends Callback { private Paint p = new Paint(); private Context context; public SwipeController(Context context) {
class SwipeController extends Callback {
private Paint p = new Paint();
private Context context;
public SwipeController(Context context) {
this.context = context;
}
@Override
public int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
return makeMovementFlags(0, LEFT);
}
@Override
public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {
return false;
}
@Override
public int convertToAbsoluteDirection(int flags, int layoutDirection) {
Log.d("convertToDirection","convertToAbsoluteDirection Executed");
return super.convertToAbsoluteDirection(flags, layoutDirection);
}
@Override
public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {
int position = viewHolder.getAdapterPosition();
if (direction == ItemTouchHelper.LEFT){
//adapter.removeItem(position);remove item from adapter
}
}
@Override
public void onChildDraw(Canvas c, RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {
Bitmap icon;
if(actionState == ItemTouchHelper.ACTION_STATE_SWIPE){
View itemView = viewHolder.itemView;
float height = (float) itemView.getBottom() - (float) itemView.getTop();
float width = height / 3;
try{
if(dX > 0){
p.setColor(Color.parseColor("#388E3C"));
RectF background = new RectF((float) itemView.getLeft(), (float) itemView.getTop(), dX,(float) itemView.getBottom());
c.drawRect(background,p);
icon = BitmapFactory.decodeResource(context.getResources(), R.drawable.voicemaildelte);
RectF icon_dest = new RectF((float) itemView.getLeft() + width ,(float) itemView.getTop() + width,(float) itemView.getLeft()+ 2*width,(float)itemView.getBottom() - width);
c.drawBitmap(icon,null,icon_dest,p);
} else {
p.setColor(Color.parseColor("#D32F2F"));
RectF background = new RectF((float) itemView.getRight() + dX, (float) itemView.getTop(),(float) itemView.getRight(), (float) itemView.getBottom());
c.drawRect(background,p);
icon = BitmapFactory.decodeResource(context.getResources(), R.drawable.voicemaildelte);
RectF icon_dest = new RectF((float) itemView.getRight() - 2*width ,(float) itemView.getTop() + width,(float) itemView.getRight() - width,(float)itemView.getBottom() - width);
c.drawBitmap(icon,null,icon_dest,p);
}
}catch(Exception e){
e.printStackTrace();
}
}
super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
}
}
[找到了重新绘制它们的方法 isCurrentlyActive此变量表示视图持有者当前是否在用户的控制下,它返回true,因此仅当用户滑动视图持有者时才使用它来绘制按钮。
@Override
public void onChildDraw(Canvas c, RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {
Bitmap icon;
if(actionState == ItemTouchHelper.ACTION_STATE_SWIPE && isCurrentlyActive){
View itemView = viewHolder.itemView;
float height = (float) itemView.getBottom() - (float) itemView.getTop();
float width = height / 3;
try{
if(dX > 0){
p.setColor(Color.parseColor("#388E3C"));
RectF background = new RectF((float) itemView.getLeft(), (float) itemView.getTop(), dX,(float) itemView.getBottom());
c.drawRect(background,p);
icon = BitmapFactory.decodeResource(context.getResources(), R.drawable.voicemaildelte);
RectF icon_dest = new RectF((float) itemView.getLeft() + width ,(float) itemView.getTop() + width,(float) itemView.getLeft()+ 2*width,(float)itemView.getBottom() - width);
c.drawBitmap(icon,null,icon_dest,p);
} else {
p.setColor(Color.parseColor("#D32F2F"));
RectF background = new RectF((float) itemView.getRight() + dX, (float) itemView.getTop(),(float) itemView.getRight(), (float) itemView.getBottom());
c.drawRect(background,p);
icon = BitmapFactory.decodeResource(context.getResources(), R.drawable.voicemaildelte);
RectF icon_dest = new RectF((float) itemView.getRight() - 2*width ,(float) itemView.getTop() + width,(float) itemView.getRight() - width,(float)itemView.getBottom() - width);
c.drawBitmap(icon,null,icon_dest,p);
}
}catch(Exception e){
e.printStackTrace();
}
}
super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
}