當活動實現OnTOuchListener時調度點擊ListView

Question

我的活動實現了OnTouchListener，它內部有一個ListView。 當用戶觸摸ListView時，我需要將ClickEvent分派給具有OnItemClickListener處理程序的ListView。

我該怎麼做？

編輯：ListView控件的

每個列表項具有的onTouchEvent處理程序。 ListView有onItemClick處理程序。

@Override 
    public boolean onTouch(View view, MotionEvent event) { 
     float actionUpX; 

     switch(event.getAction()){ 

     case MotionEvent.ACTION_DOWN: 
      actionDownX = event.getX(); 
      break; 

     case MotionEvent.ACTION_UP: 
      actionUpX = event.getX(); 

      mFlipper = (ViewFlipper) view.findViewById(R.id.view_listitem_flipper); 


      if(actionDownX < actionUpX){ 
       // |---> 
       mFlipper.showNext();     
      } else if(actionDownX > actionUpX){ 
       // <---| 
       mFlipper.showPrevious(); 
      } else { 
        //Click 
        //Need to dispatch itemClickEvent to ListView 

        //view.performClick(); this line causes StackOverflowException 
        } 
      break; 
     } 
     return true; 
    } 

@Override 
public void onItemClick(AdapterView<?> parent, View view, int position, 
     long id) { 
    //Need do an action using position of view 

} 

我的列表項是ViewFlipper，當用戶觸摸和拖拽項目，ViewFlipper需要執行 showNext或ShowPrevious和單一的點擊已經通過onItemClick

Answer 1

如果你希望能夠單擊一個項目在列表中，有一些事情發生，你需要做類似如下：

public class YourClass extends ListActivity { 
    //Your Variables 
    ArrayList<Type> yourlist; 
    YourAdapterClass adapter; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     yourlist = new ArrayList<Type>(); 
     this.adapter = new YourAdapterClass(this, R.layout.row, yourlist); 
     setListAdapter(this.adapter); 

     //you might be able to see if the below works instead of overriding 
     //the OnListItemClickListener farther below 
     ListView lv = getListView(); 

     lv.setOnItemClickListener(new OnItemClickListener() { 
      public void onItemClick(AdapterView<?> parent, View view, 
            int position, long id) { 
       Log.i("testy", "I Clicked on Row " + position + " and it worked!"); 
      } 
     }); 
    } 

    @Override 
    /** 
    * When the user selects an item in the list, do an action 
    * @param ListView l 
    * @param View v 
    * @param int position 
    * @param long id 
    */ 
    protected void onListItemClick(ListView l, View v, int position, long id) { 
     super.onListItemClick(l, v, position, id); 

     final int index = position; 

     //You can add whatever you want to happen when you click here 

     Log.i("testy", "I Clicked on Row " + index + " and this overriding worked!"); 

    } 

//other methods can go here for you list 


} 

您還需要一個適配器類（在我的例子我適配器類被稱爲YourAdapterClass），則可以使這個私有類在ListActivty或類似下面的它自己的Java文件一個完全新的類：定製

public class YourAdapterClass extends ArrayAdapter { 
     protected ArrayList items; 

     public YourAdapterClass(Context context, int textViewResourceId, ArrayList items) { 
      super(context, textViewResourceId, items); 
      this.items = items; 
     } 

     @Override 
     public View getView(int position, View convertView, ViewGroup parent) { 
      View v = convertView; 

      if(v == null) { 
       LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
       v = vi.inflate(R.layout.row, null); 
      } 

      //do stuff to your list view row if it is a custom row with multiple 
      //components like text views, image views etc. 

      return v; 


     } 
} 

通常這種方式用於自定義列表視圖（列表做成行，但你可以ñ使用它的正常看法以及）

希望這可以幫助你至少開始在正確的方向。

祝你好運。

（這是一個答案，我基本放棄了與此類似Custom ListVIew and onclick另一個線程）

Answer 2

來處理也許你的活動並不需要實現OnTouchListener？讓ListView處理觸摸事件。如果這不適合你，那麼在處理它之前考慮將觸摸事件傳遞給超類。這應該正確地發送事件或告訴你是否沒有人處理它。