弹出窗口中有多个按钮，试图保持井井有条

Question

我正在片段 Tab3Fragment 中实现一个弹出窗口，并希望保留弹出窗口代码，

 public void showPopup(View anchorView){
 } 

并尽可能地最小化 Tab3Fragment 中的其他地方以保持整洁。

目前 showPopup 看起来像这样，

public void showPopup(View anchorView) {    
    Button btnDismiss, btnFirstRecord, btnPreviousRecord, btnNextRecord, btnLastRecord;
    LayoutInflater layoutInflater = (LayoutInflater)getActivity().getSystemServi (Context.LAYOUT_INFLATER_SERVICE);
    View popupView = layoutInflater.inflate(R.layout.popup_layout, null);
    final PopupWindow popupWindow = new PopupWindow(popupView, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);    
    TextView tv = (TextView)popupView.findViewById(R.id.tv);
    tv.setText("Blah, blah, blah");

    btnDismiss = (Button)popupView.findViewById(R.id.btnDismissxml);
    btnFirstRecord = (Button)popupView.findViewById(R.id.btnFirstRecordxml);
    btnPreviousRecord = (Button)popupView.findViewById(R.id.btnPreviousRecordxml);
    btnNextRecord = (Button)popupView.findViewById(R.id.btnNextRecordxml);
    btnLastRecord = (Button)popupView.findViewById(R.id.btnLastRecordxml);

    popupWindow.setFocusable(true);
    int location[] = new int[2];
    anchorView.getLocationOnScreen(location);
    popupWindow.showAtLocation(anchorView, Gravity.CENTER, 0, 0);
    }   
}

问题： 有没有办法在 showPopup 中实现 onClick 方法 case-switch 语句来处理这个问题？也许像，

@Override
public void onClick(View v) {       
    switch (v.getId()) {
    case R.id.btnFirstRecordxml:
        //firstRecord(v);
        break;
    case R.id.btnPreviousRecordxml:
        //previousRecord(v);
        break;
    case R.id.btnNextRecordxml:
        //nextRecord(v);
        break;
    case R.id.btnLastRecordxml:
        //lastRecord(v);
        break;
    case R.id.btnDismissxml:
        //closePopup(v);
        break;  
    }}

其他解决方案比如把onClick放到popup_layout.xml中，

<Button
    android:id="@+id/btnFirstRecordxml"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/pszFirstRecordButton" 
    android:onClick="Tab3Fragment.firstRecord"/>

处理按钮点击将不胜感激。提前谢谢...

2014 年 11 月 23 日更新。 这是一个适用于 showPopup() 中多个按钮代码的解决方案。我将在弹出窗口中有几个按钮....

private void showPopup(){
    LayoutInflater layoutInflater = (LayoutInflater)getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);    
    View popupView = layoutInflater.inflate(R.layout.popup_layout, null);
    Button btnDismiss=(Button)popupView.findViewById(R.id.btnDismissxml);
    Button btnSaveRecord=(Button)popupView.findViewById(R.id.btnSaveRecordxml);
    final PopupWindow popupWindow=new PopupWindow(popupView,480,500,true);
    popupWindow.showAtLocation(popupView, Gravity.CENTER, 0, 40);                                   
//first button
    btnSaveRecord.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            saveRecord();
        }
    });
 //second button
    btnDismiss.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            popupWindow.dismiss();
        }
    });
}

有什么方法可以插入 case-switch 结构以允许 showPopup() 中的其他按钮代码？这将避免为每个按钮创建单独的 onClickListener-onClicks，如上所示。

Answer 1

像这样修改xml，在所有按钮中使用android:onClick="ClickEvent"这个格式

<Button
android:id="@+id/btnFirstRecordxml"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/pszFirstRecordButton" 
android:onClick="ClickEvent"/>
<Button
android:id="@+id/btnPreviousRecordxml"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/pszPreviousRecordButton" 
android:onClick="ClickEvent"/>

像这样使用点击功能，

public void clickEvent(View v)
{
    switch (v.getId()) {
case R.id.btnFirstRecordxml:
    //firstRecord(v);
    break;
case R.id.btnPreviousRecordxml:
    //previousRecord(v);
    break;
case R.id.btnNextRecordxml:
    //nextRecord(v);
    break;
case R.id.btnLastRecordxml:
    //lastRecord(v);
    break;
case R.id.btnDismissxml:
    //closePopup(v);
    break;  
}
}  

或者试试这个，

btn.setOnClickListener(btnaction); 为所有按钮设置这样的监听器，

 OnClickListener btnaction = new OnClickListener() {
   @Override
   public void onClick(View v) {
     //use the switch conditons...
   }
 };
btn1.setOnClickListener(btnaction);
btn2.setOnClickListener(btnaction);

Answer 2

public void showPopup(View anchorView) {    
    Button btnDismiss, btnFirstRecord, btnPreviousRecord, btnNextRecord, btnLastRecord;
    LayoutInflater layoutInflater = (LayoutInflater)getActivity().getSystemServi (Context.LAYOUT_INFLATER_SERVICE);
    View popupView = layoutInflater.inflate(R.layout.popup_layout, null);
    final PopupWindow popupWindow = new PopupWindow(popupView, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);    
    TextView tv = (TextView)popupView.findViewById(R.id.tv);
    tv.setText("Blah, blah, blah");

    btnDismiss = (Button)popupView.findViewById(R.id.btnDismissxml);
    btnFirstRecord = (Button)popupView.findViewById(R.id.btnFirstRecordxml);
    btnPreviousRecord = (Button)popupView.findViewById(R.id.btnPreviousRecordxml);
    btnNextRecord = (Button)popupView.findViewById(R.id.btnNextRecordxml);
    btnLastRecord = (Button)popupView.findViewById(R.id.btnLastRecordxml);

btnFirstRecord.setOnClickListener(new Listener());
btnPreviousRecord.setOnClickListener(new Listener());
btnNextRecord .setOnClickListener(new Listener());
btnLastRecord .setOnClickListener(new Listener()); 

    popupWindow.setFocusable(true);
    int location[] = new int[2];
    anchorView.getLocationOnScreen(location);
    popupWindow.showAtLocation(anchorView, Gravity.CENTER, 0, 0);
    }   
}


Class Listener implements OnClickListener
{
@Override
        public void onClick(View v) {
 switch (v.getId()) {
    case R.id.btnFirstRecordxml:
        //firstRecord(v);
        break;
    case R.id.btnPreviousRecordxml:
        //previousRecord(v);
        break;
    case R.id.btnNextRecordxml:
        //nextRecord(v);
        break;
    case R.id.btnLastRecordxml:
        //lastRecord(v);
        break;
    case R.id.btnDismissxml:
        //closePopup(v);
        break;  
    }

}

}