Android 在安卓系统中,如何在“让”或“右”刷卡后重新刷卡到初始状态?

Android 在安卓系统中,如何在“让”或“右”刷卡后重新刷卡到初始状态?,android,Android,下面是我的代码。我能左右滑动。但问题是,一旦我向左或向右滑动,我就不能再向右或向左滑动,回到初始状态。例如,首先我将有文本视图列表,然后如果我向左滑动,那么我将得到一个图标,文本视图将消失。因此,现在我需要向右滑动以返回文本视图,并且时间图标应该消失。我该怎么做 public class MainActivity extends AppCompatActivity { private ArrayList countries = new ArrayList<>(

下面是我的代码。我能左右滑动。但问题是,一旦我向左或向右滑动,我就不能再向右或向左滑动,回到初始状态。例如,首先我将有文本视图列表,然后如果我向左滑动,那么我将得到一个图标,文本视图将消失。因此,现在我需要向右滑动以返回文本视图,并且时间图标应该消失。我该怎么做

   public class MainActivity extends AppCompatActivity {
        private ArrayList countries =  new ArrayList<>();
        private DataAdapter adapter;
        private RecyclerView recyclerView;
        private AlertDialog.Builder alertDialog;
        private EditText et_country;
        private int edit_position;
        private View view;
        private boolean add = false;
        private Paint p = new Paint();


        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);

            initViews();
        }

        private void initViews(){
            recyclerView = (RecyclerView)findViewById(R.id.card_recycler_view);
            recyclerView.setHasFixedSize(true);
            RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getApplicationContext());
            recyclerView.setLayoutManager(layoutManager);
            adapter = new DataAdapter(countries);
            recyclerView.setAdapter(adapter);
            initSwipe();

        }
        private void initSwipe(){
            final ItemTouchHelper.SimpleCallback simpleItemTouchCallback = new ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT ) {

                @Override
                public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {

                    return true;
                }

                @Override
                public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {

                    int position = viewHolder.getAdapterPosition();
                    if( direction == ItemTouchHelper.RIGHT) {
                        Toast.makeText(MainActivity.this, "right", Toast.LENGTH_SHORT).show();
                    } else {
                        Toast.makeText(MainActivity.this, "left", Toast.LENGTH_SHORT).show();
                    }
                }

                @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;

                        if(dX < 0) {
                            p.setColor(Color.parseColor("#FF0000"));
                            RectF background = new RectF((float) itemView.getRight() + dX, (float) itemView.getTop(),(float) itemView.getRight(), (float) itemView.getBottom());
                            c.drawRect(background,p);
                            icon = BitmapFactory.decodeResource(getResources(), R.drawable.selectedicon);
                            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);

                        } 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(getResources(), R.drawable.selectedicon);
                            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);

                        }
                    }
                    super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
                }
            };

            ItemTouchHelper itemTouchHelper = new ItemTouchHelper(simpleItemTouchCallback);
            itemTouchHelper.attachToRecyclerView(recyclerView);


        }


    }
public类MainActivity扩展了AppCompatActivity{
私有ArrayList国家/地区=新ArrayList();
专用数据适配器;
私人回收站;
私有AlertDialog.Builder AlertDialog;
国家私人编辑部;
私人编辑职位;
私人视野;
私有布尔加法=false;
专用油漆p=新油漆();
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initViews();
}
私有void initViews(){
recyclerView=(recyclerView)findViewById(R.id.card\u recycler\u视图);
recyclerView.setHasFixedSize(true);
RecyclerView.LayoutManager LayoutManager=新的LinearLayoutManager(getApplicationContext());
recyclerView.setLayoutManager(layoutManager);
适配器=新数据适配器(国家/地区);
recyclerView.setAdapter(适配器);
initSwipe();
}
私有void initSwipe(){
final ItemTouchHelper.SimpleCallback simpleItemTouchCallback=新建ItemTouchHelper.SimpleCallback(0,ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT){
@凌驾
公共布尔onMove(RecyclerView RecyclerView、RecyclerView.ViewHolder ViewHolder、RecyclerView.ViewHolder目标){
返回true;
}
@凌驾
公共空间(RecyclerView.ViewHolder ViewHolder,int方向){
int position=viewHolder.getAdapterPosition();
if(direction==ItemTouchHelper.RIGHT){
Toast.makeText(MainActivity.this,“right”,Toast.LENGTH_SHORT.show();
}否则{
Toast.makeText(MainActivity.this,“left”,Toast.LENGTH_SHORT.show();
}
}
@凌驾
public void onChildraw(画布c、RecyclerView RecyclerView、RecyclerView.ViewHolder ViewHolder、float dX、float dY、int actionState、boolean isCurrentlyActive){
位图图标;
如果(actionState==ItemTouchHelper.ACTION\u STATE\u SWIPE){
View itemView=viewHolder.itemView;
浮动高度=(float)itemView.getBottom()-(float)itemView.getTop();
浮动宽度=高度/3;
if(dX<0){
p、 setColor(Color.parseColor(#FF0000”);
RectF background=new RectF((float)itemView.getRight()+dX,(float)itemView.getTop(),(float)itemView.getRight(),(float)itemView.getBottom());
c、 drawRect(背景,p);
icon=BitmapFactory.decodeResource(getResources(),R.drawable.selectedicon);
RectF icon_dest=new RectF((float)itemView.getRight()-2*width,(float)itemView.getTop()+width,(float)itemView.getRight()-width,(float)itemView.getBottom()-width);
c、 drawBitmap(图标,null,图标,p);
}否则{
p、 setColor(Color.parseColor(#D32F2F”);
RectF background=new RectF((float)itemView.getRight()+dX,(float)itemView.getTop(),(float)itemView.getRight(),(float)itemView.getBottom());
c、 drawRect(背景,p);
icon=BitmapFactory.decodeResource(getResources(),R.drawable.selectedicon);
RectF icon_dest=new RectF((float)itemView.getRight()-2*width,(float)itemView.getTop()+width,(float)itemView.getRight()-width,(float)itemView.getBottom()-width);
c、 drawBitmap(图标,null,图标,p);
}
}
super.onchildraw(c、recyclerView、viewHolder、dX、dY、actionState、isCurrentlyActive);
}
};
ItemTouchHelper ItemTouchHelper=新的ItemTouchHelper(simpleItemTouchCallback);
itemTouchHelper.attachToRecyclerView(recyclerView);
}
}
if(dX<0){
p、 setColor(Color.parseColor(#FF0000”);
RectF background=new RectF((float)itemView.getRight()+dX,(float)itemView.getTop(),(float)itemView.getRight(),(float)itemView.getBottom());
c、 drawRect(背景,p);
icon=BitmapFactory.decodeResource(getResources(),R.drawable.selectedicon);
RectF icon_dest=new RectF((float)itemView.getRight()-2*width,(float)itemView.getTop()+width,(float)itemView.getRight()-width,(float)itemView.getBottom()-width);
c、 drawBitmap(图标,null,图标,p);
dX=0;
} 
上述代码适用于向左滑动,然后向右滑动以返回初始状态。

if(dX<0){
p、 setColor(Color.parseColor(#FF0000”);
RectF background=new RectF((float)itemView.getRight()+dX,(float)itemView.getTop(),(float)itemView.getRight(),(float)itemView.getBottom());
c、 drawRect(背景,p);
     @Override
                    public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {

                        return true;
                    }

    change it to return false

@Override
                    public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {

                        return false;
                    }
 if(dX < 0) {
                            p.setColor(Color.parseColor("#FF0000"));
                            RectF background = new RectF((float) itemView.getRight() + dX, (float) itemView.getTop(),(float) itemView.getRight(), (float) itemView.getBottom());
                            c.drawRect(background,p);
                            icon = BitmapFactory.decodeResource(getResources(), R.drawable.selectedicon);
                            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);
                            dX = 0;

                        }