如何在android中滑動時隱藏/顯示listview項目上的隱藏組件？

Question

這就是我所做的。 當你滑動listview的項目時，我已經在listview的項目上顯示隱藏的組件現在我需要在其他項目被刷或滾動listview時再次隱藏組件。

public class MainActivity extends Activity { 

    ListView lstView1; 
    ArrayList<HashMap<String, String>> MyArrList; 
    GestureDetector gestureDetector; 
    View.OnTouchListener gestureListener; 

    private static final int SWIPE_MIN_DISTANCE = 120; 
    private static final int SWIPE_MAX_OFF_PATH = 250; 
    private static final int SWIPE_THRESHOLD_VELOCITY = 100; 

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

     MyArrList = new ArrayList<HashMap<String, String>>(); 
     HashMap<String, String> map; 

     /*** Rows 1 ***/ 
     map = new HashMap<String, String>(); 
     map.put("ImageID", "1"); 
     map.put("ImageDesc", "Sea View1"); 
     map.put("ImagePath", "pic_a"); 
     map.put("status", "false"); 
     MyArrList.add(map); 

     /*** Rows 2 ***/ 
     map = new HashMap<String, String>(); 
     map.put("ImageID", "2"); 
     map.put("ImageDesc", "Sea View2"); 
     map.put("ImagePath", "pic_b"); 
     map.put("status", "false"); 
     MyArrList.add(map); 

     /*** Rows 3 ***/ 
     map = new HashMap<String, String>(); 
     map.put("ImageID", "3"); 
     map.put("ImageDesc", "Sea View 3"); 
     map.put("ImagePath", "pic_c"); 
     map.put("status", "false"); 
     MyArrList.add(map); 

     /*** Rows 4 ***/ 
     map = new HashMap<String, String>(); 
     map.put("ImageID", "4"); 
     map.put("ImageDesc", "Sea View 4"); 
     map.put("ImagePath", "pic_d"); 
     map.put("status", "false"); 
     MyArrList.add(map); 

     // listView1 
     lstView1 = (ListView) findViewById(R.id.listView1); 

     lstView1.setAdapter(new ImageAdapter(this)); 
     // lstView1.setEnabled(false); 

     gestureDetector = new GestureDetector(new MyGestureDetector()); 
     gestureListener = new View.OnTouchListener() { 
      public boolean onTouch(View v, MotionEvent event) { 
       if (gestureDetector.onTouchEvent(event)) { 
        return true; 
       } 
       return false; 
      } 
     }; 
     lstView1.setOnTouchListener(gestureListener); 
     //lstView1.setOnScrollListener(l) 
    } 

    class MyGestureDetector extends SimpleOnGestureListener { 
     @Override 
     public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, 
       float velocityY) { 
      try { 
       if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH) 
        return false; 
       // right to left swipe 
       if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE 
         && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) { 

        int pos = YourSlideRightToLeft(lstView1.pointToPosition(
          (int) e1.getX(), (int) e1.getY())); 
        MyArrList.get(pos).put("status", "true"); 
        ((BaseAdapter) lstView1.getAdapter()) 
          .notifyDataSetChanged(); 

       } else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE 
         && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) { 
        // left to right swipe 
        YourSlideLeftToRight(lstView1.pointToPosition(
          (int) e1.getX(), (int) e1.getY())); 
        int pos = YourSlideRightToLeft(lstView1.pointToPosition(
          (int) e1.getX(), (int) e1.getY())); 
        MyArrList.get(pos).put("status", "true"); 
        ((BaseAdapter) lstView1.getAdapter()) 
          .notifyDataSetChanged(); 

       } 
      } catch (Exception e) { 
       // nothing 
       return true; 
      } 

      return true; 

     } 
    } 

    // Command for Slide Right to Left (<-----) 
    public int YourSlideRightToLeft(int position) { 
     Toast.makeText(
       MainActivity.this, 
       "<-- Your Slide Right to Left ImgID = " 
         + MyArrList.get(position).get("ImageID"), 
       Toast.LENGTH_SHORT).show(); 
     return position; 
    } 

    // Command for Slide Left to Right (<-----) 
    public int YourSlideLeftToRight(int position) { 
     Toast.makeText(
       MainActivity.this, 
       "---> Your Slide Left to Right ImgID = " 
         + MyArrList.get(position).get("ImageID"), 
       Toast.LENGTH_SHORT).show(); 
     return position; 
    } 

    public class ImageAdapter extends BaseAdapter { 
     private Context context; 

     public ImageAdapter(Context c) { 
      // TODO Auto-generated method stub 
      context = c; 
     } 

     public int getCount() { 
      // TODO Auto-generated method stub 
      return MyArrList.size(); 
     } 

     public Object getItem(int position) { 
      // TODO Auto-generated method stub 
      return position; 
     } 

     public long getItemId(int position) { 
      // TODO Auto-generated method stub 
      return position; 
     } 

     public View getView(final int position, View convertView, 
       ViewGroup parent) { 
      // TODO Auto-generated method stub 

      LayoutInflater inflater = (LayoutInflater) context 
        .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 

      if (convertView == null) { 
       convertView = inflater.inflate(R.layout.activity_column, null); 
      } 

      // ColImage 
      ImageView imageView = (ImageView) convertView 
        .findViewById(R.id.ColImgPath); 
      imageView.getLayoutParams().height = 80; 
      imageView.getLayoutParams().width = 80; 
      imageView.setScaleType(ImageView.ScaleType.CENTER_CROP); 
      imageView.setPadding(5, 5, 5, 5); 
      int ResID = context.getResources().getIdentifier(
        MyArrList.get(position).get("ImagePath"), "drawable", 
        context.getPackageName()); 
      imageView.setImageResource(ResID); 

      // ColImgID 
      TextView txtPosition = (TextView) convertView 
        .findViewById(R.id.ColImgID); 
      txtPosition.setPadding(10, 0, 0, 0); 
      txtPosition.setText(MyArrList.get(position).get("ImageID") + "."); 

      // ColPicname 
      TextView txtPicName = (TextView) convertView 
        .findViewById(R.id.ColImgDesc); 
      txtPicName.setPadding(5, 0, 0, 0); 
      txtPicName.setText(MyArrList.get(position).get("ImageDesc")); 
      String value = MyArrList.get(position).get("status"); 
      if (value.contentEquals("true")) { 
       ((TableRow) convertView.findViewById(R.id.tableRow4)) 
         .setVisibility(View.VISIBLE); 
       ((Button) convertView.findViewById(R.id.btn)).setTag(Integer 
         .valueOf(position)); 
       ((ToggleButton) convertView.findViewById(R.id.tg)) 
         .setTag(Integer.valueOf(position)); 
      } else { 
       ((LinearLayout) convertView.findViewById(R.id.tableRow4)) 
         .setVisibility(View.GONE); 
      } 

      return convertView; 

     } 

    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     getMenuInflater().inflate(R.menu.activity_main, menu); 
     return true; 
    } 

} 

Answer 1

這個'SwipeToDismissUndoList' code可能會幫助你。