带有复选框项目的微调器,是否可以?
答案 0 :(得分:6)
这取决于你的意思。
如果你想要一个真正的多选Spinner
,那么Android中没有内置的东西。
请注意,您可以控制下拉列表的Spinner
行中的内容,但单选按钮除外。如果您想在行中添加复选框,请成为我的访客。它看起来很奇怪,可能无法正常处理触摸事件,也不会删除单选按钮(AFAIK),并且在正常模式下与Spinner
的内容完全无关。因此,我不推荐这种方法,但它是可行的。
可以从Android开源项目获得Spinner
的源代码,因此欢迎您克隆它并开发MultiSelectSpinner
或其他内容。
答案 1 :(得分:6)
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);
}
}
答案 2 :(得分:3)
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);
}
}
然后在你的布局.xml:
<xxx.xx.gui.MultiSpinner android:id="@+id/SpinnerCollegues"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:prompt="@string/university"/>
答案 3 :(得分:2)
您可以使用复选框创建ListView。您甚至可以将其添加到对话框中。这基本上都是一个微调器。
答案 4 :(得分:2)
实施了MultiSpinner,你可以在AndroidArsenal上找到它
找到它如果你添加一个提示,看起来不错: android:提示=&#34;选择......&#34;
答案 5 :(得分:0)
我创建了一个动态填充的Spinner,通过内容解析器获取Sqlite数据库查询的内容,关闭时它是一个Image而不是text,它显示了所选的内容,并且它非常简单: - )
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,是什么让它显示它的选择是这一行,它将填充值并将radioCheckbox放在右侧,列表中的顶部/第一个元素将被预选。
adapter.setDropDownViewResource(android.R.layout.simple_list_item_single_choice);
还有其他几种预定义的布局非常好用
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(而不是选择的是什么),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。它做了什么,如果它是否是旋转器的初始化,它会用布尔值跟踪。如果有真正的点击,我们提取信息并通过控制器更新另一个UI元素(也可能是一个回调)如果Clicked元素是StandardSelected元素我设置SpinnerImage未选中,如果它的其他,那么我设置的标准元素选择了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));
}
}
}