如何包裝ActionBarSherlock導航微調器中的文本內容

Question

我想包裝我的ActionBar導航微調器（我使用ActionBar Sherlock）的文本內容。看起來我的微調控制器獲得了下拉列表中包含的項目的寬度。

如何讓微調器中的選定項目根據其寬度「包裝」？在GMaps行動欄微調器中可以找到一個例子。

Answer 1

UPDATE：

這裏下載我的示例項目：Spinner width test (Dropbox folder) （它包含在這個答案提供了兩種解決方案）。

由於字符的字距（字母間距）是取決於文本不同，微調的寬度也改變寬度我postet更早（下）的答案

所以不是串稱號，只需設定的TextView的寬度像素這樣的：

textView.setWidth(200); 

• 現在文本將被截斷，結束時用「..」。

• 旋轉器的寬度保持相同的大小。

• 您可以在下拉列表和整流器

• 你仍然需要一個定製SpinnerAdapter設置不同的寬度，但你並不需要一個定製
  SpinnerItem類，只是給適配器的String [ ]數組。

spinner.setAdapter（新 TruncatedSpinnerAdapter（字符串數組））; //字符串[]

在TruncatedSpinnerAdapter：

public class TruncatedSpinnerAdapter implements SpinnerAdapter { 

    String[] spinnerItem; 

    public TruncatedSpinnerAdapter(String[] spinnerItem) { 
     this.spinnerItem = spinnerItem; 
    } 

// ...more required interface callbacks here... 

    /** 
    * Returns the View that is shown when a spinner item is selected. 
    */ 
    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     View view = getLayoutInflater().inflate(
       android.R.layout.simple_spinner_item, null); 
     TextView textView = (TextView) view.findViewById(android.R.id.text1); 
     textView.setText(spinnerItem[position]); 
     //Set the width of the TextView in pixel. 
     //the text will now get truncated and ending with ".." 
     textView.setWidth(200); 
     return textView; 
    } 

答案之前更新：

您可以通過創建一個自定義SpinnerAdapter來包裝文本類型，您可以在其中控制在Spinner視圖和Spinner下拉視圖中顯示的文本的長度。

/** 
    * A SpinnerItemAdapter to handle SpinnerItem Objects, 
    * displays the ArrayList of SpinnerItem Objects. 
    */ 
    public class SpinnerItemAdapter implements SpinnerAdapter{ 

     /** 
     * The internal data, ArrayList of SpinnerItem Objects. 
     */ 
     SparseArray<SpinnerItem> spinnerItem; 

     public SpinnerItemAdapter(SparseArray<SpinnerItem> spinnerItem){ 
      this.spinnerItem = spinnerItem; 
     } 

     /** 
     * Returns the Size 
     */ 
     @Override 
     public int getCount() { 
      return spinnerItem.size(); 
     } 
     /** 
     * Returns a SpinnerItem Object at the specified position. 
     */ 
     @Override 
     public Object getItem(int position) { 
      return spinnerItem.valueAt(position); 
     } 


// ...more required interface callbacks here... 


     /** 
     * Views displayed when the Spinner is clicked, the drop 
     * down list of spinner items. 
     */ 
     @Override 
     public View getDropDownView(int position, View convertView, 
       ViewGroup parent) { 
      View view=getLayoutInflater().inflate(android.R.layout.simple_spinner_dropdown_item, null); 
      TextView v=(TextView)view.findViewById(android.R.id.text1); 
      v.setText(spinnerItem.valueAt(position).getDropDownTitle());  
      return v; 
     } 
     /** 
     * Returns the View that is shown when a spinner item is selected. 
     */ 
     @Override 
     public View getView(int position, View convertView, ViewGroup parent) { 
      View view=getLayoutInflater().inflate(android.R.layout.simple_spinner_item, null); 
      TextView v=(TextView)view.findViewById(android.R.id.text1); 
      v.setText(spinnerItem.valueAt(position).getShortTitle()); 
      return v; 
     } 

    } 

填充自定義SpinnerItem類，它並返回一個短標題微調查看適配器。

class SpinnerItem { 

    // SpinnerItem fields, including variable of type SpinnerItem 
    public String title = ""; 
    // sets the width of the spinnerItem 
    public int titleLength = 10;//default value 
    public int titleDropDownLength = 20; 

    public long id; 

    // SpinnerItem methods() 

    /** 
    * Title with max characters displayed, set by titleLength; 
    * 
    * @return title of the spinnerItem. 
    */ 
    public CharSequence getShortTitle() { 
     if (title.length() == 0) 
      return "?";// 
     else if (title.length() > 0 && title.length() <= titleLength) { 
      return title; 
     } else { 
      String shortTile = title.substring(0, titleLength).trim() + ".."; 
      return shortTile; 
     } 
    } 

    public CharSequence getDropDownTitle() { 
     if (title.length() == 0) 
      return "?";// 
     else if (title.length() > 0 && title.length() <= titleDropDownLength) { 
      return title; 
     } else { 
      String shortTile = title.substring(0, titleDropDownLength).trim() + ".."; 
      return shortTile; 
     } 
    } 
} 

與SpinnerItem類可以控制通過在創建對象SpinnerItem設定MAX標題長度在噴絲項目視圖中顯示的標題的長度。

//Create an ArrayList for the Adapter with SpinnerItems 
     SparseArray<SpinnerItem> spinnerItems = new SparseArray<SpinnerItem>(); 

     //Some dummy Cheese titles for the spinner items 
     String[] sCheeseStrings = { 
       "Abbaye de Belloc", "Abbaye du Mont des Cats", "Abertam", "Abondance", "Ackawi", 
       "Acorn", "Adelost", "Affidelice au Chablis", "Afuega'l Pitu", "Airag", "Airedale"}; 

     for (int i = 0; i < sCheeseStrings.length; i++) { 
      SpinnerItem spinnerItem= new SpinnerItem(); 
      spinnerItem.title=sCheeseStrings[i]; 
      spinnerItem.id=i; 
      spinnerItem.titleLength=MAX_TITLE_LENGTH; 
      spinnerItem.titleDropDownLength=MAX_DROP_DOWN_TITLE_LENGTH; 
      spinnerItems.append(i, spinnerItem); 
     } 
     spinnerAdapter = new SpinnerItemAdapter(spinnerItems); 

然後spinnerAdapter添加到微調

spinner.setAdapter(spinnerAdapter); 

動作條：在微調實例menu.xml文件

 // For API below 11 use ActionBar Sherlock with Android Support Library 
//  getSupportMenuInflater().inflate(R.menu.activity_menu, menu); 
     // For API above 11 
     getMenuInflater().inflate(R.menu.activity_menu, menu); 
     spinner_menu = (Spinner) menu.findItem(R.id.menu_spinner).getActionView(); 
     spinner_menu.setAdapter(spinnerAdapter); 

Answer 2

其實Android將嘗試調用getView（）的所有項目，並設置寬度最寬的旋轉器寬度。請在其他線程中參考我的解決方案。 https://stackoverflow.com/a/15356679/2159849