Question

我需要帮助... :-) 我的ListView有一个自定义适配器。这些项目是TextViews。我希望能够在每个TextView上处理onSingleTap，onFling和所有其他事件。但只有onDown事件有效！其他所有人都不要！我不明白为什么。在我的其他活动中，TextViews不是ListView的一部分，一切正常......

这就是我所拥有的：

public class ListViewAdapter extends BaseAdapter{
 ...
 private GestureDetector txtProductGD;
 private View.OnTouchListener txtProductGL;
 ...

 public ListViewAdapter(Context context, ArrayList<Product> products) {
  ...
  txtProductGL = new View.OnTouchListener() {
   public boolean onTouch(View v, MotionEvent event) {
    txtProductGD = new GestureDetector(new txtProductGestureDetector((TextView) v));

    return txtProductGD.onTouchEvent(event);
   }
  };
  ...
 }

 public View getView(int position, View convertView, ViewGroup parent) {
 ...
 view = inflater.inflate(R.layout.listview_item, null);

 TextView textView = (TextView) view.findViewById(R.id.txtProduct);

 textView.setOnTouchListener(txtProductGL);
 ...
 }

 private class txtProductGestureDetector extends SimpleOnGestureListener {

  private TextView textView;

  public txtProductGestureDetector(TextView textView) {
   this.textView = textView;
  }

  public boolean onDown (MotionEvent e) {
   textView.setText("onDown..."); // IT WORKS!
   return false; 
  }

  public boolean onSingleTapConfirmed (MotionEvent e) {
   textView.setText("onSingleTapConfirmed..."); // IT DOESN'T WORK!
   return false;
  }

  // ALL OTHER METHODS ARE ALSO DON'T WORK!..       
 }                  
}

Answer 1

我不知道您是否使用自定义类txtProductGestureDetector是出于其他原因，但如果您只想覆盖特定视图的方法，请尝试以下操作：

TextView textView = (TextView) view.findViewById(R.id.txtProduct);
textView.setOnTouchListener(new OnTouchListener() {
    public boolean onTouch(View v, MotionEvent event) {
        switch(event.getAction()) {
            case (MotionEvent.ACTION_DOWN) :
                Log.d(DEBUG_TAG,"Action was DOWN");
                return true;
            case (MotionEvent.ACTION_MOVE) :
                Log.d(DEBUG_TAG,"Action was MOVE");
                return true;
            case (MotionEvent.ACTION_UP) :
                Log.d(DEBUG_TAG,"Action was UP");
                return true;
            case (MotionEvent.ACTION_CANCEL) :
                Log.d(DEBUG_TAG,"Action was CANCEL");
                return true;     
            default : 
                return true;
            }            
        }
});

可以将其放在getView方法中，并将touchListener指定给textView。

OnFling和其他方法不适用于ListView中的TextView

1 个答案: