AlertDialog MultiChoice沒有給我正確的選擇

Question

我正在嘗試使用動態數據構建多選AlertDialog。

好的，這一切都加載偉大等，但選擇是搞砸了。

這裏是我的代碼：

new AlertDialog.Builder(this) 
     .setTitle("Cities") 
     .setMultiChoiceItems(_options, _selections, new DialogInterface.OnMultiChoiceClickListener(){ 

       @Override 
       public void onClick(DialogInterface dialog, int clicked, boolean selected) { 
         Log.i("Database", _options[clicked] + " selected: " + selected); 
       } 

     }) 
     .setPositiveButton("OK", new DialogInterface.OnClickListener(){ 

       @Override 
       public void onClick(DialogInterface dialog, int clicked) { 
        switch(clicked) { 
         case DialogInterface.BUTTON_POSITIVE: 
          for(int i = 0; i < _options.length; i++){ 
           Log.i("Database", "id: " + _values[i] + " " + _options[i] + " selected: " + _selections[i]); 
          } 
          break; 
        } 
       } 
     }) 
     .create(); 

正如你可以在logcat中看到，我描述了我的問題：

** OPENED ALERTDIALOG VIA A BUTTON AND SELECTED THE FOLLOWING: ** 
07-12 16:06:51.347: I/Database(8034): Aveiro selected: true 
07-12 16:06:53.936: I/Database(8034): Coimbra selected: true 
07-12 16:07:00.116: I/Database(8034): Porto selected: true 

** AFTER PRESSING THE OK BUTTON, THIS SHOWS UP, WHICH IS CORRECT: ** 
07-12 16:07:02.826: I/Database(8034): id: 1 Aveiro selected: true 
07-12 16:07:02.826: I/Database(8034): id: 2 Coimbra selected: true 
07-12 16:07:02.826: I/Database(8034): id: 3 Porto selected: true 
07-12 16:07:02.826: I/Database(8034): id: 4 Minho selected: false 

** I CLICKED THE BUTTON TO START THE DIALOG AGAIN DE UNSELECTED THE FOLLOWING: ** 
07-12 16:07:07.087: I/Database(8034): Coimbra selected: false 

** AFTER PRESSING THE OK BUTTON, ALL SHOWS AS FALSE. 1 AND 3 SHOULD BE TRUE: ** 
07-12 16:07:08.097: I/Database(8034): id: 1 Aveiro selected: false 
07-12 16:07:08.097: I/Database(8034): id: 2 Coimbra selected: false 
07-12 16:07:08.097: I/Database(8034): id: 3 Porto selected: false 
07-12 16:07:08.097: I/Database(8034): id: 4 Minho selected: false 

Answer 1

編輯

想你的代碼，它是工作對於我來說足夠了。逐步完成並確保您的值是正確的。

這是我的測試應用程序。唯一的區別是我不知道_values是什麼，所以我把它拿出來了。

public class SandBoxActivity extends Activity { 

    private Button testButton; 

    private CharSequence[] _options = {"Aveiro", "Coimbra", "Porto", "Minho"}; 

    private boolean[] _selections = {true, true, true, false}; 

    private AlertDialog test; 

    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 

     test = new AlertDialog.Builder(this) 
     .setTitle("Cities") 
     .setMultiChoiceItems(_options, _selections, new DialogInterface.OnMultiChoiceClickListener(){ 

       @Override 
       public void onClick(DialogInterface dialog, int clicked, boolean selected) { 
         Log.i("Database", _options[clicked] + " selected: " + selected); 
       } 

     }) 
     .setPositiveButton("OK", new DialogInterface.OnClickListener(){ 

       @Override 
       public void onClick(DialogInterface dialog, int clicked) { 
        switch(clicked) { 
         case DialogInterface.BUTTON_POSITIVE: 
          for(int i = 0; i < _options.length; i++){ 
           Log.i("Database", "id: " + " " + _options[i] + " selected: " + _selections[i]); 
          } 
          break; 
        } 
       } 
     }) 
     .create(); 

     this.testButton = (Button) findViewById(R.id.color_button); 
     this.testButton.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       test.show(); 
      } 
     }); 
    } 
} 

---

舊帖子

.setMultiChoiceItems(_options, _selections, new DialogInterface.OnMultiChoiceClickListener(){ 

       @Override 
       public void onClick(DialogInterface dialog, int clicked, boolean selected) { 
         Log.i("Database", _options[clicked] + " selected: " + selected); 
       } 

     }) 

我沒有看到你實際處理，它被點擊的事實。我看到您正在向日志中打印它被點擊的內容，但是您並未改變在您的_selections陣列中選擇的事實。這可能是你的問題。

試試這個：

.setMultiChoiceItems(_options, _selections, new DialogInterface.OnMultiChoiceClickListener(){ 

       @Override 
       public void onClick(DialogInterface dialog, int clicked, boolean selected) { 
         _selections[clicked] = selected; 
         Log.i("Database", _options[clicked] + " selected: " + selected); 
       } 

     }) 

Answer 2

Silentw， 請仔細閱讀this

我們必須提供布爾數組每次它創建

另外需要更新你的代碼作爲選擇的選項如下

public void onClick(DialogInterface dialog, int clicked, boolean selected) 
{      
        if(!_selections[clicked]) 
         _selections[clicked] = true; 
        else 
         _selections[clicked]=false; 

         Log.i("Database", _options[clicked] + " selected: " + selected); 

}