如何獲取從哪個上下文菜單選項被選中的視圖？

Question

在我的應用程序中，我動態地創建了一些視圖，並且他們都註冊了相同的上下文菜單。

for(int j = 0; j < CELLS_IN_ROW; j++) { 
    MyView v = new MyView(); 
    ((Activity) context).registerForContextMenu(v); 
} 
/* ----------------------------------------------- */ 


    @Override 
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) { 
    super.onCreateContextMenu(menu, v, menuInfo); 

    MenuInflater menuInflater = getMenuInflater(); 
    menuInflater.inflate(R.menu.cell_context_menu, menu); 
} 

    @Override 
    public boolean onContextItemSelected(MenuItem item) { 
    switch (item.getItemId()) { 
     case R.id.myOption: 
      MyView viewClicked = ????? 

      doSomethingDependingOnView(viewClicked); 
      return true; 

     default: 
      return super.onContextItemSelected(item); 
    } 
} 

但是，當單擊菜單選項時，我想根據單擊哪個視圖打開上下文菜單來執行不同的操作。我怎樣才能做到這一點？

Answer 1

試試這個：

@Override 
public boolean onContextItemSelected(MenuItem item) { 
switch (item.getItemId()) { 
    case R.id.myOption: 

     AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo(); 
     MyView viewClicked = (MyView) info.targetView;  

     doSomethingDependingOnView(viewClicked); 
     return true; 

    default: 
     return super.onContextItemSelected(item); 
} 

Answer 2

不是最好的方法，但似乎工作只有一個：

// create a global variable 
Button clickedButton = null; 

// save the button 
@Override 
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) { 
    clickedButton = (Button) v; 
} 

// do something with the clickedButton 
@Override 
public boolean onContextItemSelected(MenuItem item) { 
    doSomethingDependingOnView(clickedButton); 
    return true; 
} 

Answer 3

你當你的onCreateContextMenu開始得益於其參數在您clickedView參考查看。

onCreateContextMenu（文本菜單釐米，查看視圖，ContextMenuInfo CMI）

所以你必須聲明查看的一些變量在您的活動（或片段）， 那麼你應該初始化一個在onCreateContextMenu和終於可以在onContextItemSelected

MyView viewClicked; 

@Override 
public void onCreateContextMenu(ContextMenu menu, 
          View view, // this is your clicked view 
          ContextMenu.ContextMenuInfo menuInfo) { 
super.onCreateContextMenu(menu, v, menuInfo); 

MenuInflater menuInflater = getMenuInflater(); 
menuInflater.inflate(R.menu.cell_context_menu, menu); 
viewClicked = view; // <---!!! 

}

@Override 
public boolean onContextItemSelected(MenuItem item) { 
switch (item.getItemId()) { 
    case R.id.myOption: 

     viewClicked.someMethod(); 

     doSomethingDependingOnView(viewClicked); 
     return true; 
    default: 
     return super.onContextItemSelected(item); 
} 

使用

}