Question

我正在尝试使用动态数据构建多重Alertyialog。

好的，这些都是很好的加载等等，但选择很糟糕。

这是我的代码：

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();

正如您在LogCat中看到的，我描述了我的问题：

** 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

修改

尝试了你的代码，它对我来说很好。逐步完成它并确保您的值正确。

这是我的测试应用。唯一的区别是我不知道_values是什么，所以我把它拿出来了。

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(); } }); } }

旧帖子

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

我没有看到你实际上正在处理它被点击的事实。我看到您正在打印它所单击的日志，但您没有更改它在_selections数组中被选中的事实。这可能是你的问题。

试试这个：

.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，请阅读this

我们必须在每次创建时为所选选项提供布尔数组

同时更新您的代码如下

  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);

}

AlertDialog MultiChoice没有给我正确的选择

2 个答案: