我有一个ListVIEw,它处于singleChoice模式.我想要的只是在侧面显示一个Radiobutton,当点击高亮显示它被选中时,当点击另一个时,一个人隐藏并且新一个被选中.
我查看了Mark的书,第8章,“用列表获得花哨”和他的RateList示例
但它并没有解决我的问题.
请帮我 .
解决方法:
编辑
值得一提的是我在列表项上有一个@R_404_5971@：有一个图标,一个标题,一个描述,然后是复选框或单选按钮(取决于它是单个还是多个选项列表).我的示例解决方案是由不少于三个不同部分描述的：
>自定义列表项目
>甜蜜温柔的爱：CheckablelinearLayout实现
> ListVIEw配置示例
还有奖金：
>示例Adapter :: getVIEw()实现.
那么,让我们接受魔术,不管吗？
Listitem.xml
<com.dbm.CheckablelinearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID" androID:layout_wIDth="match_parent" androID:layout_height="wrap_content" androID:orIEntation="horizontal"> <ImageVIEw androID:layout_wIDth="32dp" androID:layout_height="32dp" androID:ID="@+ID/myIcon" /> <linearLayout androID:layout_wIDth="match_parent" androID:layout_height="wrap_content" androID:layout_weight="1" androID:orIEntation="vertical"> <TextVIEw androID:layout_wIDth="match_parent" androID:layout_height="wrap_content" androID:textAppearance="@androID:style/TextAppearance.Medium" androID:textStyle="bold" androID:ellipsize="end" androID:ID="@+ID/myTitle" /> <TextVIEw androID:layout_wIDth="match_parent" androID:layout_height="wrap_content" androID:textAppearance="@androID:style/TextAppearance.Small" androID:textStyle="italic" androID:ellipsize="end" androID:ID="@+ID/myDescr" /> </linearLayout> <CheckedTextVIEw androID:layout_wIDth="wrap_content" androID:layout_height="wrap_content" androID:ID="@androID:ID/text1" /></com.dbm.CheckablelinearLayout>CheckablelinearLayout.java
public class CheckablelinearLayout extends linearLayout implements Checkable { private CheckedTextVIEw mCheckedTextVIEw; private final Drawable mCheckDrawable; private final Drawable mRadioDrawable; private boolean mIsChecked; /** * Constructor. * * @param context The context to operate in. * @param attrs The attributes defined in XML for this element. */ public CheckablelinearLayout(Context context, AttributeSet attrs) { super(context, attrs); TypedArray typedArray = null; // Cache the check Box drawable. typedArray = context.gettheme().obtainStyledAttributes(new int[] {androID.R.attr.ListChoiceIndicatorMultiple}); if ((typedArray != null) && (typedArray.length() > 0)) { mCheckDrawable = typedArray.getDrawable(0); } else { // Fallback if the target theme doesn't define a check Box drawable. // Perhaps an application specific drawable should be used instead of null. mCheckDrawable = null; } // Careful with resources like this, we don't need any memory leaks. typedArray.recycle(); // Cache the radio button drawable. typedArray = context.gettheme().obtainStyledAttributes(new int[] {androID.R.attr.ListChoiceIndicatorSingle}); if ((typedArray != null) && (typedArray.length() > 0)) { mRadioDrawable = typedArray.getDrawable(0); } else { // Fallback if the target theme doesn't define a radio button drawable. // Perhaps an application specific drawable should be used instead of null mRadioDrawable = null; } // Careful with resources like this, we don't need any memory leaks. typedArray.recycle(); mIsChecked = false; } /* * (non-Javadoc) * @see androID.Widget.Checkable#isChecked() */ public boolean isChecked() { return mIsChecked; } /* * (non-Javadoc) * @see androID.vIEw.VIEw#onAttachedToWindow() */ @OverrIDe protected voID onAttachedToWindow() { super.onAttachedToWindow(); // Check if there is a valID GUI element that can visualize the current check-state. if (mCheckedTextVIEw != null) { VIEwParent p = getParent(); // Check if the parent of this List item is a ListVIEw if (p instanceof ListVIEw) { int choiceMode = ((ListVIEw) p).getChoiceMode(); // DecIDe which check-state notation to visualize (check Box, radio button or none). switch (choiceMode) { case ListVIEw.CHOICE_MODE_MulTIPLE: mCheckedTextVIEw.setcheckmarkDrawable(mCheckDrawable); break; case ListVIEw.CHOICE_MODE_SINGLE: mCheckedTextVIEw.setcheckmarkDrawable(mRadioDrawable); break; default: mCheckedTextVIEw.setcheckmarkDrawable(null); break; } } } } /* * (non-Javadoc) * @see androID.vIEw.VIEw#onFinishInflate() */ @OverrIDe protected voID onFinishInflate() { super.onFinishInflate(); mCheckedTextVIEw = (CheckedTextVIEw) findVIEwByID(androID.R.ID.text1); } /* * (non-Javadoc) * @see androID.Widget.Checkable#setChecked(boolean) */ public voID setChecked(boolean checked) { mIsChecked = checked; if (mCheckedTextVIEw != null) { mCheckedTextVIEw.setChecked(mIsChecked); } } /* * (non-Javadoc) * @see androID.Widget.Checkable#toggle() */ public voID toggle() { setChecked(!mIsChecked); }}exampleListVIEw.xml
注意！如果您将androID：choiceMode属性设置为“multipleChoice”,则会自动获取复选框,如果您将其设置为“singleChoice”,则会自动获取复选框,前提是您使用上述实现.
<linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID" androID:layout_wIDth="match_parent" androID:layout_height="match_parent"> <ListVIEw androID:layout_wIDth="match_parent" androID:layout_height="wrap_content" androID:choiceMode="singleChoice" androID:ID="@+ID/myList" /></linearLayout>额外奖励：MyCustomAdapter :: getVIEw()
这个依赖于Cursor.当然,您将根据自己的需要实施它.
private final class VIEwHolder { public ImageVIEw iconVIEw; public TextVIEw TitleVIEw; public TextVIEw descriptionVIEw;}/* * (non-Javadoc) * @see androID.Widget.Adapter#getVIEw(int, androID.vIEw.VIEw, androID.vIEw.VIEwGroup) */public VIEw getVIEw(int position, VIEw convertVIEw, VIEwGroup parent) { VIEw vIEw = null; // Only do something if the requested position exists within the Cursor. if (mCursor.movetoposition(position)) { VIEwHolder vIEwHolder; vIEw = convertVIEw; if (vIEw == null) { // Create and initialize a new vIEw if not created already for this position. vIEw = mLayoutInflater.inflate(R.layout.Listitem, null); // Don't "find vIEw by ID" each and every time, but rather save a reference // to them and associate the references with the List item itself by storing // them in the List items "tag" attribute. When the vIEw is re-used later on, // you already have a reference to its vIEws and don't need to find them // again, which is a time-consuming operation. vIEwHolder = new VIEwHolder(); vIEwHolder.iconVIEw = (ImageVIEw) vIEw.findVIEwByID(R.ID.myIcon); vIEwHolder.TitleVIEw = (TextVIEw) vIEw.findVIEwByID(R.ID.myTitle); vIEwHolder.descriptionVIEw = (TextVIEw) vIEw.findVIEwByID(R.ID.myDescr); vIEw.setTag(vIEwHolder); } else { // Get the references to the vIEws for this, already existing List item. vIEwHolder = (VIEwHolder) vIEw.getTag(); } // Create a bitmap from the byte array in the database. byte[] buffer = mCursor.getBlob(mIconColumnIndex); Bitmap icon = null; // Try to decode the byte array if it exists. if (buffer != null) { icon = BitmapFactory.decodeByteArray(buffer, 0, buffer.length); } // Update the vIEws with new data. vIEwHolder.iconVIEw.setimageBitmap(icon); String Title = mCursor.getString(mTitleColumnIndex); vIEwHolder.TitleVIEw.setText(Title); String description = mCursor.getString(mDescriptionColumnIndex); vIEwHolder.descriptionVIEw.setText(description); } // Return a vIEw showing the correct data for the item at 'position'. return vIEw;}原始答案：
我可以建议这个链接：
http://tokudu.com/2010/android-checkable-linear-layout/
当我处于你的确切位置时,我自己非常高兴:-)如果还有什么不清楚的地方,请随时指出你的问题,我很乐意帮助或协助进一步的代码示例(正如前面提到的那样：几天前我一直在你的位置.
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