See the Spinners guide.
* * @attr ref android.R.styleable#Spinner_dropDownHorizontalOffset * @attr ref android.R.styleable#Spinner_dropDownSelector * @attr ref android.R.styleable#Spinner_dropDownVerticalOffset * @attr ref android.R.styleable#Spinner_dropDownWidth * @attr ref android.R.styleable#Spinner_gravity * @attr ref android.R.styleable#Spinner_popupBackground * @attr ref android.R.styleable#Spinner_prompt * @attr ref android.R.styleable#Spinner_spinnerMode */ @Widget public class Spinner extends AbsSpinner implements OnClickListener { private static final String TAG = "Spinner"; // Only measure this many items to get a decent max width. private static final int MAX_ITEMS_MEASURED = 15; /** * Use a dialog window for selecting spinner options. */ public static final int MODE_DIALOG = 0; /** * Use a dropdown anchored to the Spinner for selecting spinner options. */ public static final int MODE_DROPDOWN = 1; /** * Use the theme-supplied value to select the dropdown mode. */ private static final int MODE_THEME = -1; private SpinnerPopup mPopup; private DropDownAdapter mTempAdapter; int mDropDownWidth; private int mGravity; private boolean mDisableChildrenWhenDisabled; private Rect mTempRect = new Rect(); /** * Construct a new spinner with the given context's theme. * * @param context The Context the view is running in, through which it can * access the current theme, resources, etc. */ public Spinner(Context context) { this(context, null); } /** * Construct a new spinner with the given context's theme and the supplied * mode of displaying choices.mode may be one of
* {@link #MODE_DIALOG} or {@link #MODE_DROPDOWN}.
*
* @param context The Context the view is running in, through which it can
* access the current theme, resources, etc.
* @param mode Constant describing how the user will select choices from the spinner.
*
* @see #MODE_DIALOG
* @see #MODE_DROPDOWN
*/
public Spinner(Context context, int mode) {
this(context, null, com.android.internal.R.attr.spinnerStyle, mode);
}
/**
* Construct a new spinner with the given context's theme and the supplied attribute set.
*
* @param context The Context the view is running in, through which it can
* access the current theme, resources, etc.
* @param attrs The attributes of the XML tag that is inflating the view.
*/
public Spinner(Context context, AttributeSet attrs) {
this(context, attrs, com.android.internal.R.attr.spinnerStyle);
}
/**
* Construct a new spinner with the given context's theme, the supplied attribute set,
* and default style.
*
* @param context The Context the view is running in, through which it can
* access the current theme, resources, etc.
* @param attrs The attributes of the XML tag that is inflating the view.
* @param defStyle The default style to apply to this view. If 0, no style
* will be applied (beyond what is included in the theme). This may
* either be an attribute resource, whose value will be retrieved
* from the current theme, or an explicit style resource.
*/
public Spinner(Context context, AttributeSet attrs, int defStyle) {
this(context, attrs, defStyle, MODE_THEME);
}
/**
* Construct a new spinner with the given context's theme, the supplied attribute set,
* and default style. mode may be one of {@link #MODE_DIALOG} or
* {@link #MODE_DROPDOWN} and determines how the user will select choices from the spinner.
*
* @param context The Context the view is running in, through which it can
* access the current theme, resources, etc.
* @param attrs The attributes of the XML tag that is inflating the view.
* @param defStyle The default style to apply to this view. If 0, no style
* will be applied (beyond what is included in the theme). This may
* either be an attribute resource, whose value will be retrieved
* from the current theme, or an explicit style resource.
* @param mode Constant describing how the user will select choices from the spinner.
*
* @see #MODE_DIALOG
* @see #MODE_DROPDOWN
*/
public Spinner(Context context, AttributeSet attrs, int defStyle, int mode) {
super(context, attrs, defStyle);
TypedArray a = context.obtainStyledAttributes(attrs,
com.android.internal.R.styleable.Spinner, defStyle, 0);
if (mode == MODE_THEME) {
mode = a.getInt(com.android.internal.R.styleable.Spinner_spinnerMode, MODE_DIALOG);
}
switch (mode) {
case MODE_DIALOG: {
mPopup = new DialogPopup();
break;
}
case MODE_DROPDOWN: {
DropdownPopup popup = new DropdownPopup(context, attrs, defStyle);
mDropDownWidth = a.getLayoutDimension(
com.android.internal.R.styleable.Spinner_dropDownWidth,
ViewGroup.LayoutParams.WRAP_CONTENT);
popup.setBackgroundDrawable(a.getDrawable(
com.android.internal.R.styleable.Spinner_popupBackground));
final int verticalOffset = a.getDimensionPixelOffset(
com.android.internal.R.styleable.Spinner_dropDownVerticalOffset, 0);
if (verticalOffset != 0) {
popup.setVerticalOffset(verticalOffset);
}
final int horizontalOffset = a.getDimensionPixelOffset(
com.android.internal.R.styleable.Spinner_dropDownHorizontalOffset, 0);
if (horizontalOffset != 0) {
popup.setHorizontalOffset(horizontalOffset);
}
mPopup = popup;
break;
}
}
mGravity = a.getInt(com.android.internal.R.styleable.Spinner_gravity, Gravity.CENTER);
mPopup.setPromptText(a.getString(com.android.internal.R.styleable.Spinner_prompt));
mDisableChildrenWhenDisabled = a.getBoolean(
com.android.internal.R.styleable.Spinner_disableChildrenWhenDisabled, false);
a.recycle();
// Base constructor can call setAdapter before we initialize mPopup.
// Finish setting things up if this happened.
if (mTempAdapter != null) {
mPopup.setAdapter(mTempAdapter);
mTempAdapter = null;
}
}
/**
* Set the background drawable for the spinner's popup window of choices.
* Only valid in {@link #MODE_DROPDOWN}; this method is a no-op in other modes.
*
* @param background Background drawable
*
* @attr ref android.R.styleable#Spinner_popupBackground
*/
public void setPopupBackgroundDrawable(Drawable background) {
if (!(mPopup instanceof DropdownPopup)) {
Log.e(TAG, "setPopupBackgroundDrawable: incompatible spinner mode; ignoring...");
return;
}
((DropdownPopup) mPopup).setBackgroundDrawable(background);
}
/**
* Set the background drawable for the spinner's popup window of choices.
* Only valid in {@link #MODE_DROPDOWN}; this method is a no-op in other modes.
*
* @param resId Resource ID of a background drawable
*
* @attr ref android.R.styleable#Spinner_popupBackground
*/
public void setPopupBackgroundResource(int resId) {
setPopupBackgroundDrawable(getContext().getResources().getDrawable(resId));
}
/**
* Get the background drawable for the spinner's popup window of choices.
* Only valid in {@link #MODE_DROPDOWN}; other modes will return null.
*
* @return background Background drawable
*
* @attr ref android.R.styleable#Spinner_popupBackground
*/
public Drawable getPopupBackground() {
return mPopup.getBackground();
}
/**
* Set a vertical offset in pixels for the spinner's popup window of choices.
* Only valid in {@link #MODE_DROPDOWN}; this method is a no-op in other modes.
*
* @param pixels Vertical offset in pixels
*
* @attr ref android.R.styleable#Spinner_dropDownVerticalOffset
*/
public void setDropDownVerticalOffset(int pixels) {
mPopup.setVerticalOffset(pixels);
}
/**
* Get the configured vertical offset in pixels for the spinner's popup window of choices.
* Only valid in {@link #MODE_DROPDOWN}; other modes will return 0.
*
* @return Vertical offset in pixels
*
* @attr ref android.R.styleable#Spinner_dropDownVerticalOffset
*/
public int getDropDownVerticalOffset() {
return mPopup.getVerticalOffset();
}
/**
* Set a horizontal offset in pixels for the spinner's popup window of choices.
* Only valid in {@link #MODE_DROPDOWN}; this method is a no-op in other modes.
*
* @param pixels Horizontal offset in pixels
*
* @attr ref android.R.styleable#Spinner_dropDownHorizontalOffset
*/
public void setDropDownHorizontalOffset(int pixels) {
mPopup.setHorizontalOffset(pixels);
}
/**
* Get the configured horizontal offset in pixels for the spinner's popup window of choices.
* Only valid in {@link #MODE_DROPDOWN}; other modes will return 0.
*
* @return Horizontal offset in pixels
*
* @attr ref android.R.styleable#Spinner_dropDownHorizontalOffset
*/
public int getDropDownHorizontalOffset() {
return mPopup.getHorizontalOffset();
}
/**
* Set the width of the spinner's popup window of choices in pixels. This value
* may also be set to {@link android.view.ViewGroup.LayoutParams#MATCH_PARENT}
* to match the width of the Spinner itself, or
* {@link android.view.ViewGroup.LayoutParams#WRAP_CONTENT} to wrap to the measured size
* of contained dropdown list items.
*
* Only valid in {@link #MODE_DROPDOWN}; this method is a no-op in other modes.
* * @param pixels Width in pixels, WRAP_CONTENT, or MATCH_PARENT * * @attr ref android.R.styleable#Spinner_dropDownWidth */ public void setDropDownWidth(int pixels) { if (!(mPopup instanceof DropdownPopup)) { Log.e(TAG, "Cannot set dropdown width for MODE_DIALOG, ignoring"); return; } mDropDownWidth = pixels; } /** * Get the configured width of the spinner's popup window of choices in pixels. * The returned value may also be {@link android.view.ViewGroup.LayoutParams#MATCH_PARENT} * meaning the popup window will match the width of the Spinner itself, or * {@link android.view.ViewGroup.LayoutParams#WRAP_CONTENT} to wrap to the measured size * of contained dropdown list items. * * @return Width in pixels, WRAP_CONTENT, or MATCH_PARENT * * @attr ref android.R.styleable#Spinner_dropDownWidth */ public int getDropDownWidth() { return mDropDownWidth; } @Override public void setEnabled(boolean enabled) { super.setEnabled(enabled); if (mDisableChildrenWhenDisabled) { final int count = getChildCount(); for (int i = 0; i < count; i++) { getChildAt(i).setEnabled(enabled); } } } /** * Describes how the selected item view is positioned. Currently only the horizontal component * is used. The default is determined by the current theme. * * @param gravity See {@link android.view.Gravity} * * @attr ref android.R.styleable#Spinner_gravity */ public void setGravity(int gravity) { if (mGravity != gravity) { if ((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) == 0) { gravity |= Gravity.START; } mGravity = gravity; requestLayout(); } } /** * Describes how the selected item view is positioned. The default is determined by the * current theme. * * @return A {@link android.view.Gravity Gravity} value */ public int getGravity() { return mGravity; } @Override public void setAdapter(SpinnerAdapter adapter) { super.setAdapter(adapter); if (mPopup != null) { mPopup.setAdapter(new DropDownAdapter(adapter)); } else { mTempAdapter = new DropDownAdapter(adapter); } } @Override public int getBaseline() { View child = null; if (getChildCount() > 0) { child = getChildAt(0); } else if (mAdapter != null && mAdapter.getCount() > 0) { child = makeAndAddView(0); mRecycler.put(0, child); removeAllViewsInLayout(); } if (child != null) { final int childBaseline = child.getBaseline(); return childBaseline >= 0 ? child.getTop() + childBaseline : -1; } else { return -1; } } @Override protected void onDetachedFromWindow() { super.onDetachedFromWindow(); if (mPopup != null && mPopup.isShowing()) { mPopup.dismiss(); } } /** *A spinner does not support item click events. Calling this method * will raise an exception.
*Instead use {@link AdapterView#setOnItemSelectedListener}. * * @param l this listener will be ignored */ @Override public void setOnItemClickListener(OnItemClickListener l) { throw new RuntimeException("setOnItemClickListener cannot be used with a spinner."); } /** * @hide internal use only */ public void setOnItemClickListenerInt(OnItemClickListener l) { super.setOnItemClickListener(l); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); if (mPopup != null && MeasureSpec.getMode(widthMeasureSpec) == MeasureSpec.AT_MOST) { final int measuredWidth = getMeasuredWidth(); setMeasuredDimension(Math.min(Math.max(measuredWidth, measureContentWidth(getAdapter(), getBackground())), MeasureSpec.getSize(widthMeasureSpec)), getMeasuredHeight()); } } /** * @see android.view.View#onLayout(boolean,int,int,int,int) * * Creates and positions all views * */ @Override protected void onLayout(boolean changed, int l, int t, int r, int b) { super.onLayout(changed, l, t, r, b); mInLayout = true; layout(0, false); mInLayout = false; } /** * Creates and positions all views for this Spinner. * * @param delta Change in the selected position. +1 means selection is moving to the right, * so views are scrolling to the left. -1 means selection is moving to the left. */ @Override void layout(int delta, boolean animate) { int childrenLeft = mSpinnerPadding.left; int childrenWidth = mRight - mLeft - mSpinnerPadding.left - mSpinnerPadding.right; if (mDataChanged) { handleDataChanged(); } // Handle the empty set by removing all views if (mItemCount == 0) { resetList(); return; } if (mNextSelectedPosition >= 0) { setSelectedPositionInt(mNextSelectedPosition); } recycleAllViews(); // Clear out old views removeAllViewsInLayout(); // Make selected view and position it mFirstPosition = mSelectedPosition; View sel = makeAndAddView(mSelectedPosition); int width = sel.getMeasuredWidth(); int selectedOffset = childrenLeft; final int layoutDirection = getLayoutDirection(); final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection); switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) { case Gravity.CENTER_HORIZONTAL: selectedOffset = childrenLeft + (childrenWidth / 2) - (width / 2); break; case Gravity.RIGHT: selectedOffset = childrenLeft + childrenWidth - width; break; } sel.offsetLeftAndRight(selectedOffset); // Flush any cached views that did not get reused above mRecycler.clear(); invalidate(); checkSelectionChanged(); mDataChanged = false; mNeedSync = false; setNextSelectedPositionInt(mSelectedPosition); } /** * Obtain a view, either by pulling an existing view from the recycler or * by getting a new one from the adapter. If we are animating, make sure * there is enough information in the view's layout parameters to animate * from the old to new positions. * * @param position Position in the spinner for the view to obtain * @return A view that has been added to the spinner */ private View makeAndAddView(int position) { View child; if (!mDataChanged) { child = mRecycler.get(position); if (child != null) { // Position the view setUpChild(child); return child; } } // Nothing found in the recycler -- ask the adapter for a view child = mAdapter.getView(position, null, this); // Position the view setUpChild(child); return child; } /** * Helper for makeAndAddView to set the position of a view * and fill out its layout paramters. * * @param child The view to position */ private void setUpChild(View child) { // Respect layout params that are already in the view. Otherwise // make some up... ViewGroup.LayoutParams lp = child.getLayoutParams(); if (lp == null) { lp = generateDefaultLayoutParams(); } addViewInLayout(child, 0, lp); child.setSelected(hasFocus()); if (mDisableChildrenWhenDisabled) { child.setEnabled(isEnabled()); } // Get measure specs int childHeightSpec = ViewGroup.getChildMeasureSpec(mHeightMeasureSpec, mSpinnerPadding.top + mSpinnerPadding.bottom, lp.height); int childWidthSpec = ViewGroup.getChildMeasureSpec(mWidthMeasureSpec, mSpinnerPadding.left + mSpinnerPadding.right, lp.width); // Measure child child.measure(childWidthSpec, childHeightSpec); int childLeft; int childRight; // Position vertically based on gravity setting int childTop = mSpinnerPadding.top + ((getMeasuredHeight() - mSpinnerPadding.bottom - mSpinnerPadding.top - child.getMeasuredHeight()) / 2); int childBottom = childTop + child.getMeasuredHeight(); int width = child.getMeasuredWidth(); childLeft = 0; childRight = childLeft + width; child.layout(childLeft, childTop, childRight, childBottom); } @Override public boolean performClick() { boolean handled = super.performClick(); if (!handled) { handled = true; if (!mPopup.isShowing()) { mPopup.show(); } } return handled; } public void onClick(DialogInterface dialog, int which) { setSelection(which); dialog.dismiss(); } @Override public void onInitializeAccessibilityEvent(AccessibilityEvent event) { super.onInitializeAccessibilityEvent(event); event.setClassName(Spinner.class.getName()); } @Override public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { super.onInitializeAccessibilityNodeInfo(info); info.setClassName(Spinner.class.getName()); } /** * Sets the prompt to display when the dialog is shown. * @param prompt the prompt to set */ public void setPrompt(CharSequence prompt) { mPopup.setPromptText(prompt); } /** * Sets the prompt to display when the dialog is shown. * @param promptId the resource ID of the prompt to display when the dialog is shown */ public void setPromptId(int promptId) { setPrompt(getContext().getText(promptId)); } /** * @return The prompt to display when the dialog is shown */ public CharSequence getPrompt() { return mPopup.getHintText(); } int measureContentWidth(SpinnerAdapter adapter, Drawable background) { if (adapter == null) { return 0; } int width = 0; View itemView = null; int itemType = 0; final int widthMeasureSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); final int heightMeasureSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); // Make sure the number of items we'll measure is capped. If it's a huge data set // with wildly varying sizes, oh well. int start = Math.max(0, getSelectedItemPosition()); final int end = Math.min(adapter.getCount(), start + MAX_ITEMS_MEASURED); final int count = end - start; start = Math.max(0, start - (MAX_ITEMS_MEASURED - count)); for (int i = start; i < end; i++) { final int positionType = adapter.getItemViewType(i); if (positionType != itemType) { itemType = positionType; itemView = null; } itemView = adapter.getView(i, itemView, this); if (itemView.getLayoutParams() == null) { itemView.setLayoutParams(new ViewGroup.LayoutParams( ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT)); } itemView.measure(widthMeasureSpec, heightMeasureSpec); width = Math.max(width, itemView.getMeasuredWidth()); } // Add background padding to measured width if (background != null) { background.getPadding(mTempRect); width += mTempRect.left + mTempRect.right; } return width; } /** *
Wrapper class for an Adapter. Transforms the embedded Adapter instance * into a ListAdapter.
*/ private static class DropDownAdapter implements ListAdapter, SpinnerAdapter { private SpinnerAdapter mAdapter; private ListAdapter mListAdapter; /** *Creates a new ListAdapter wrapper for the specified adapter.
* * @param adapter the Adapter to transform into a ListAdapter */ public DropDownAdapter(SpinnerAdapter adapter) { this.mAdapter = adapter; if (adapter instanceof ListAdapter) { this.mListAdapter = (ListAdapter) adapter; } } public int getCount() { return mAdapter == null ? 0 : mAdapter.getCount(); } public Object getItem(int position) { return mAdapter == null ? null : mAdapter.getItem(position); } public long getItemId(int position) { return mAdapter == null ? -1 : mAdapter.getItemId(position); } public View getView(int position, View convertView, ViewGroup parent) { return getDropDownView(position, convertView, parent); } public View getDropDownView(int position, View convertView, ViewGroup parent) { return mAdapter == null ? null : mAdapter.getDropDownView(position, convertView, parent); } public boolean hasStableIds() { return mAdapter != null && mAdapter.hasStableIds(); } public void registerDataSetObserver(DataSetObserver observer) { if (mAdapter != null) { mAdapter.registerDataSetObserver(observer); } } public void unregisterDataSetObserver(DataSetObserver observer) { if (mAdapter != null) { mAdapter.unregisterDataSetObserver(observer); } } /** * If the wrapped SpinnerAdapter is also a ListAdapter, delegate this call. * Otherwise, return true. */ public boolean areAllItemsEnabled() { final ListAdapter adapter = mListAdapter; if (adapter != null) { return adapter.areAllItemsEnabled(); } else { return true; } } /** * If the wrapped SpinnerAdapter is also a ListAdapter, delegate this call. * Otherwise, return true. */ public boolean isEnabled(int position) { final ListAdapter adapter = mListAdapter; if (adapter != null) { return adapter.isEnabled(position); } else { return true; } } public int getItemViewType(int position) { return 0; } public int getViewTypeCount() { return 1; } public boolean isEmpty() { return getCount() == 0; } } /** * Implements some sort of popup selection interface for selecting a spinner option. * Allows for different spinner modes. */ private interface SpinnerPopup { public void setAdapter(ListAdapter adapter); /** * Show the popup */ public void show(); /** * Dismiss the popup */ public void dismiss(); /** * @return true if the popup is showing, false otherwise. */ public boolean isShowing(); /** * Set hint text to be displayed to the user. This should provide * a description of the choice being made. * @param hintText Hint text to set. */ public void setPromptText(CharSequence hintText); public CharSequence getHintText(); public void setBackgroundDrawable(Drawable bg); public void setVerticalOffset(int px); public void setHorizontalOffset(int px); public Drawable getBackground(); public int getVerticalOffset(); public int getHorizontalOffset(); } private class DialogPopup implements SpinnerPopup, DialogInterface.OnClickListener { private AlertDialog mPopup; private ListAdapter mListAdapter; private CharSequence mPrompt; public void dismiss() { mPopup.dismiss(); mPopup = null; } public boolean isShowing() { return mPopup != null ? mPopup.isShowing() : false; } public void setAdapter(ListAdapter adapter) { mListAdapter = adapter; } public void setPromptText(CharSequence hintText) { mPrompt = hintText; } public CharSequence getHintText() { return mPrompt; } public void show() { AlertDialog.Builder builder = new AlertDialog.Builder(getContext()); if (mPrompt != null) { builder.setTitle(mPrompt); } mPopup = builder.setSingleChoiceItems(mListAdapter, getSelectedItemPosition(), this).show(); } public void onClick(DialogInterface dialog, int which) { setSelection(which); if (mOnItemClickListener != null) { performItemClick(null, which, mListAdapter.getItemId(which)); } dismiss(); } @Override public void setBackgroundDrawable(Drawable bg) { Log.e(TAG, "Cannot set popup background for MODE_DIALOG, ignoring"); } @Override public void setVerticalOffset(int px) { Log.e(TAG, "Cannot set vertical offset for MODE_DIALOG, ignoring"); } @Override public void setHorizontalOffset(int px) { Log.e(TAG, "Cannot set horizontal offset for MODE_DIALOG, ignoring"); } @Override public Drawable getBackground() { return null; } @Override public int getVerticalOffset() { return 0; } @Override public int getHorizontalOffset() { return 0; } } private class DropdownPopup extends ListPopupWindow implements SpinnerPopup { private CharSequence mHintText; private ListAdapter mAdapter; public DropdownPopup(Context context, AttributeSet attrs, int defStyleRes) { super(context, attrs, 0, defStyleRes); setAnchorView(Spinner.this); setModal(true); setPromptPosition(POSITION_PROMPT_ABOVE); setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView parent, View v, int position, long id) { Spinner.this.setSelection(position); if (mOnItemClickListener != null) { Spinner.this.performItemClick(v, position, mAdapter.getItemId(position)); } dismiss(); } }); } @Override public void setAdapter(ListAdapter adapter) { super.setAdapter(adapter); mAdapter = adapter; } public CharSequence getHintText() { return mHintText; } public void setPromptText(CharSequence hintText) { // Hint text is ignored for dropdowns, but maintain it here. mHintText = hintText; } @Override public void show() { final Drawable background = getBackground(); int hOffset = 0; if (background != null) { background.getPadding(mTempRect); hOffset = isLayoutRtl() ? mTempRect.right : -mTempRect.left; } else { mTempRect.left = mTempRect.right = 0; } final int spinnerPaddingLeft = Spinner.this.getPaddingLeft(); final int spinnerPaddingRight = Spinner.this.getPaddingRight(); final int spinnerWidth = Spinner.this.getWidth(); if (mDropDownWidth == WRAP_CONTENT) { int contentWidth = measureContentWidth( (SpinnerAdapter) mAdapter, getBackground()); final int contentWidthLimit = mContext.getResources() .getDisplayMetrics().widthPixels - mTempRect.left - mTempRect.right; if (contentWidth > contentWidthLimit) { contentWidth = contentWidthLimit; } setContentWidth(Math.max( contentWidth, spinnerWidth - spinnerPaddingLeft - spinnerPaddingRight)); } else if (mDropDownWidth == MATCH_PARENT) { setContentWidth(spinnerWidth - spinnerPaddingLeft - spinnerPaddingRight); } else { setContentWidth(mDropDownWidth); } if (isLayoutRtl()) { hOffset += spinnerWidth - spinnerPaddingRight - getWidth(); } else { hOffset += spinnerPaddingLeft; } setHorizontalOffset(hOffset); setInputMethodMode(ListPopupWindow.INPUT_METHOD_NOT_NEEDED); super.show(); getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE); setSelection(Spinner.this.getSelectedItemPosition()); // Make sure we hide if our anchor goes away. // TODO: This might be appropriate to push all the way down to PopupWindow, // but it may have other side effects to investigate first. (Text editing handles, etc.) final ViewTreeObserver vto = getViewTreeObserver(); if (vto != null) { final OnGlobalLayoutListener layoutListener = new OnGlobalLayoutListener() { @Override public void onGlobalLayout() { if (!Spinner.this.isVisibleToUser()) { dismiss(); } } }; vto.addOnGlobalLayoutListener(layoutListener); setOnDismissListener(new OnDismissListener() { @Override public void onDismiss() { final ViewTreeObserver vto = getViewTreeObserver(); if (vto != null) { vto.removeOnGlobalLayoutListener(layoutListener); } } }); } } } }