9

带有复选框项目的微调器,有可能吗?

4

6 回答 6

9

试试这个

 <selva.spinner.multispinner android:id="@+id/multi_spinner" 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

Spinner1Activity.java

    package selva.spinner;

    import java.util.ArrayList;
    import java.util.List;
    import selva.spinner.multispinner.multispinnerListener;
    import android.app.Activity;
    import android.os.Bundle;

    public class Spinner1Activity extends Activity  implements multispinnerListener
    {

     @Override
     public void onCreate(Bundle savedInstanceState)
    {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    multispinner ms = (multispinner) findViewById(R.id.multi_spinner);
    List<String> list = new ArrayList<String>();
    list.add("one");
    list.add("two");
    list.add("three");
    list.add("four");
    list.add("five");
    list.add("six");
    list.add("seven");
    list.add("eight");
    list.add("nine");
    list.add("ten");
    ms.setItems(list, "select", this);

  }

@Override
public void onItemschecked(boolean[] checked)
{
    // TODO Auto-generated method stub

}
}

multispinner.java

 package selva.spinner;

 import java.util.List;
 import android.app.AlertDialog;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.DialogInterface.OnCancelListener;
 import android.content.DialogInterface.OnMultiChoiceClickListener;
 import android.util.AttributeSet;
 import android.widget.ArrayAdapter;
 import android.widget.Spinner;


public class multispinner extends Spinner implements
OnMultiChoiceClickListener, OnCancelListener 
{
      private List<String> listitems;
      private boolean[] checked;

      public multispinner(Context context) 
      {
          super(context);
      }

      public multispinner(Context arg0, AttributeSet arg1)
      {
          super(arg0, arg1);
      }

      public multispinner(Context arg0, AttributeSet arg1, int arg2) 
      {
          super(arg0, arg1, arg2);
      }

      @Override
      public void onClick(DialogInterface dialog, int ans, boolean isChecked)
      {
          if (isChecked)
              checked[ans] = true;
          else
              checked[ans] = false;
      }


    @Override
      public void onCancel(DialogInterface dialog)
      {

        String str="Selected values are: ";

            for (int i = 0; i < listitems.size(); i++)
            {
                        if (checked[i] == true)
                        {
                        str=str+"   "+listitems.get(i);
                        }

            }

                AlertDialog.Builder alert1 = new AlertDialog.Builder(getContext());

                alert1.setTitle("Items:");

                alert1.setMessage(str);

                alert1.setPositiveButton("Ok", null);

                alert1.show();


      }

      @Override
      public boolean performClick()
      {
          AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
          builder.setMultiChoiceItems(
                    listitems.toArray(new CharSequence[listitems.size()]), checked, this);
          builder.setPositiveButton("done",
                  new DialogInterface.OnClickListener()
          {

              @Override
              public void onClick(DialogInterface dialog, int which)
              {
                  dialog.cancel();
              }
          });
          builder.setOnCancelListener(this);
          builder.show();
          return true;
      }

      public void setItems(List<String> items, String allText,
              multispinnerListener listener)
      {
          this.listitems = items;

          checked = new boolean[items.size()];
          for (int i = 0; i < checked.length; i++)
              checked[i] =false;


          ArrayAdapter<String> adapter = new ArrayAdapter<String>(getContext(),
                  android.R.layout.simple_spinner_item, new String[] { allText });
          setAdapter(adapter);
        }

      public interface multispinnerListener 
      {
          public void onItemschecked(boolean[] checked);
      }

 }
于 2012-09-07T05:11:53.513 回答
6

这取决于你的意思。

如果你想要一个真正的 multi-select Spinner,那么 Android 中没有内置任何东西。

请注意,您可以控制Spinner下拉列表行中的内容,单选按钮除外。如果您想在行中放置复选框,请成为我的客人。它看起来很奇怪,对于触摸事件可能无法正常工作,不会删除单选按钮(AFAIK),并且与Spinner正常模式下的内容完全无关。因此,我不能推荐这种方法,但它是可行的。

源代码Spinner可从 Android 开源项目中获得,因此欢迎您克隆它并开发一个MultiSelectSpinner或一些东西。

于 2010-04-21T11:58:06.980 回答
4

您可以使用 multiSpinner:

import java.util.List;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnCancelListener;
import android.content.DialogInterface.OnMultiChoiceClickListener;
import android.util.AttributeSet;
import android.widget.ArrayAdapter;
import android.widget.Spinner;

public class MultiSpinner extends Spinner implements OnMultiChoiceClickListener, OnCancelListener {

    private List<String> items;
    private boolean[] selected;
    private String defaultText;
    private MultiSpinnerListener listener;

    public MultiSpinner(Context context) {
    super(context);
}

public MultiSpinner(Context arg0, AttributeSet arg1) {
    super(arg0, arg1);
}

public MultiSpinner(Context arg0, AttributeSet arg1, int arg2) {
    super(arg0, arg1, arg2);
}

@Override
public void onClick(DialogInterface dialog, int which, boolean isChecked) {
    if (isChecked)
        selected[which] = true;
    else
        selected[which] = false;
}

@Override
public void onCancel(DialogInterface dialog) {
    // refresh text on spinner
    StringBuffer spinnerBuffer = new StringBuffer();
    boolean someUnselected = false;
    for (int i = 0; i < items.size(); i++) {
        if (selected[i] == true) {
            spinnerBuffer.append(items.get(i));
            spinnerBuffer.append(", ");
        } else {
            someUnselected = true;
        }
    }
    String spinnerText;
    if (someUnselected) {
        spinnerText = spinnerBuffer.toString();
        if (spinnerText.length() > 2)
            spinnerText = spinnerText.substring(0, spinnerText.length() - 2);
    } else {
        spinnerText = defaultText;
    }
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(getContext(),
            android.R.layout.simple_spinner_item,
            new String[] { spinnerText });
    setAdapter(adapter);
    listener.onItemsSelected(selected);
}

@Override
public boolean performClick() {
    AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
    builder.setMultiChoiceItems(
            items.toArray(new CharSequence[items.size()]), selected, this);
    builder.setPositiveButton(R.string.ok,
            new DialogInterface.OnClickListener() {

                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.cancel();
                }
            });
    builder.setOnCancelListener(this);
    builder.show();
    return true;
}

public void setItems(List<String> items, String allText,
    MultiSpinnerListener listener) {
    this.items = items;
    this.defaultText = allText;
    this.listener = listener;

    // all selected by default
    selected = new boolean[items.size()];
    for (int i = 0; i < selected.length; i++)
        selected[i] = true;

    // all text on the spinner
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(getContext(),
            android.R.layout.simple_spinner_item, new String[] { allText });
    setAdapter(adapter);
}

public interface MultiSpinnerListener {
    public void onItemsSelected(boolean[] selected);
}

}

然后在您的布局 .xml 中:

<xxx.xx.gui.MultiSpinner android:id="@+id/SpinnerCollegues"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" 
    android:prompt="@string/university"/>
于 2012-03-15T09:59:46.583 回答
2

您可以只创建一个带有复选框的 ListView。您甚至可以将其添加到对话框中。这基本上就是一个微调器。

于 2010-04-21T13:57:15.617 回答
2

实现了一个MultiSpinner,你可以在 AndroidArsenal 上找到它

可以在Maven 存储库中找到它

如果你添加一个提示,看起来不错: android:hint="Choose ..."

于 2017-04-19T18:29:28.450 回答
0

我创建了一个动态填充 Spinner,它通过内容解析器的 Sqlite 数据库查询获取其内容,关闭时它是图像而不是文本,它显示选择的内容,而且非常简单:-)

        spinnerFavorites = (SpinnerMultiSameClick) v.findViewById(R.id.guide_btn_favorites);
        spinnerFavorites.setOnItemSelectedListener(this);    
        ContentResolver resolver = activity.getContentResolver();
        String[] projection = new String[] { DataContract.Favorites.FAVORITES_ID, DataContract.Favorites.NAME };

        Cursor cursor = resolver.query(DataContract.Favorites.CONTENT_URI, projection, null, null, DataContract.Favorites.FAVORITES_ID +" ASC");
        if (cursor.getCount() > 0) {
            // create an array to specify which fields we want to display
            String[] from = new String[] { DataContract.Favorites.NAME, DataContract.Favorites.FAVORITES_ID };
            // create an array of the display item we want to bind our data
            // to
            int[] to = new int[] { android.R.id.text1, android.R.id.text2 };
            SimpleCursorAdapter adapter = new SimpleCursorAdapter(activity, R.layout.ghost_text, cursor, from, to,
                    SimpleCursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);

            // get reference to our spinner
            spinner.setAdapter(adapter);

            adapter.setDropDownViewResource(android.R.layout.simple_list_item_single_choice);


        } else {
            // TODO: Maybe button to make new favList               
            spinnerFavorites.setVisiblity(View.GONE);

        }

现在,它看起来像一个简单的 Spinner,使它显示其选择的是这一行,它将填充值并在右侧放置一个 radioCheckbox,列表中的顶部/第一个元素将被预先选择。

adapter.setDropDownViewResource(android.R.layout.simple_list_item_single_choice);

还有其他几个预定义的布局非常好用

  • simple_list_item_checked -> 显示一个 checkMark 而不是 RadioButton
  • simple_list_item_activated_1 或 2 -> 更改 BackgroundColor
  • simple_list_item_multiple_choice -> 带有复选标记的复选框

在这里完成的是我的布局,它显示了一个标记或未标记的图像(而不是选择了什么),因此我在 spinnerAdapter 中指定了 R.layout.ghost_text。

        <com.netstream.ch.tv.android.ui.program.guide.land.SpinnerMultiSameClick
        android:id="@+id/guide_btn_favorites"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="5dp"
        android:layout_marginRight="5dp"
        android:background="@drawable/icon_selector_guide_filter_favorites"
        android:clickable="true" />

这里我的 onItemSelecte 需要 OnItemSelectedListener 接口。它的作用是用布尔值跟踪它是否初始化微调器。如果有真正的点击,我们提取信息并在控制器上更新另一个 UI 元素(也可以是回调)如果 Clicked 元素是 StandardSelected 元素我设置 SpinnerImage 未选中,如果它的 sth 则我设置的标准元素选择的 spinnerImage。

@Override
public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {

    if (parent.getId() == R.id.guide_btn_favorites) {

        if (!AbsintheViewControllerFactory.getGuideController().isFavoriteListInitialisation()) {
            Cursor c = (Cursor) parent.getItemAtPosition(pos);
            String favid = c.getString(c.getColumnIndexOrThrow(DataContract.Favorites.FAVORITES_ID));
            String name = c.getString(c.getColumnIndexOrThrow(DataContract.Favorites.NAME));
            Log.d(TAG, "Set Filter to FavListId: " + favid + " by its name: " + name);
            if (favid.equalsIgnoreCase(GuideViewController.allChannelsFavoritesIdentifier)) {
                spinnerFavorites.setSelected(false);
            } else {
                spinnerFavorites.setSelected(true);
            }
            AbsintheViewControllerFactory.getGuideController().setFavourites(favid);

            guideInfoSelectedFavoriteList.setText(name);
        } else {
            AbsintheViewControllerFactory.getGuideController().setFavoriteListInitialisation(false);
            guideInfoSelectedFavoriteList.setText(getActivity().getResources().getString(R.string.FILTER_FAVORITE_ALL_CHANNELS));
        }
    }
}
于 2014-06-27T07:22:10.560 回答