Wie verstecken/zeigen Sie versteckte Komponenten auf Elemente der Listenansicht beim Streichen in Android?

Question

Das habe ich gemacht. Ich habe die versteckten Komponenten auf dem Element der Listenansicht angezeigt, wenn Sie das Element der Listenansicht jetzt wischen Ich muss die Komponenten wieder ausblenden, wenn ein anderes Element kopiert wird oder die Listenansicht gescrollt wird.

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

Diese 'SwipeToDismissUndoList' code könnte Ihnen helfen.