¿Cómo mostrar correctamente un menú emergente debajo de un TextView, similar a Spinner?

OK, lo he arreglado cambiando el diseño y su código, pero todavía no entiendo por qué el código no funcionó bien en Android 7.1.1, pero funcionó bien en las versiones anteriores.

Aquí está el código actual (el repositorio de github actualizado también, el código original con el problema se puede encontrar aquí ):

ViewUtil.java

 class ViewUtil { static Drawable getRotateDrawable(final Drawable d, final int angle) { return new LayerDrawable(new Drawable[]{d}) { @Override public void draw(final Canvas canvas) { canvas.save(); canvas.rotate(angle, d.getBounds().width() / 2, d.getBounds().height() / 2); super.draw(canvas); canvas.restore(); } }; } @TargetApi(Build.VERSION_CODES.JELLY_BEAN) static ViewPropertyAnimator runOnAnimationEnd(final ViewPropertyAnimator animator, final Runnable runnable) { if (VERSION.SDK_INT >= VERSION_CODES.JELLY_BEAN) animator.withEndAction(runnable); else animator.setListener(new android.animation.Animator.AnimatorListener() { @Override public void onAnimationStart(final android.animation.Animator animation) { } @Override public void onAnimationRepeat(final android.animation.Animator animation) { } @Override public void onAnimationEnd(final android.animation.Animator animation) { animator.setListener(null); runnable.run(); } @Override public void onAnimationCancel(final android.animation.Animator animation) { } }); return animator; } } 

FullSizePopupSpinner.java

 public class FullSizePopupSpinner extends android.support.v7.widget.AppCompatTextView { private static final long ANIMATION_DURATION = 150; private int[] mItemsTextsResIds, mItemsIconsResIds; private int mSelectedItemPosition = -1; private SpinnerPopupWindow mPopupWindow; private boolean mInitialized = false; private OnItemSelectedListener mOnItemSelectedListener; private Drawable mClosedDrawable; private Drawable mOpenedDrawable; public interface OnItemSelectedListener { void onItemSelected(FullSizePopupSpinner parent, int position, String item, int previousSelectedPosition); void onNothingSelected(FullSizePopupSpinner parent); } public FullSizePopupSpinner(final Context context) { super(context); init(context); } public FullSizePopupSpinner(final Context context, final AttributeSet attrs) { super(context, attrs); init(context); } public FullSizePopupSpinner(final Context context, final AttributeSet attrs, final int defStyleAttr) { super(context, attrs, defStyleAttr); init(context); } @Override public Parcelable onSaveInstanceState() { Parcelable superState = super.onSaveInstanceState(); SavedState ss = new SavedState(superState); ss.mSelectedItemPosition = this.mSelectedItemPosition; ss.mItemsTextsResIds = mItemsTextsResIds; ss.mItemsIconsResIds = mItemsIconsResIds; return ss; } @Override public void onRestoreInstanceState(Parcelable state) { if (!(state instanceof SavedState)) { super.onRestoreInstanceState(state); return; } SavedState ss = (SavedState) state; super.onRestoreInstanceState(ss.getSuperState()); setItems(ss.mItemsTextsResIds, ss.mItemsIconsResIds); setSelectedItemPosition(ss.mSelectedItemPosition); } public void setItems(final int[] itemsTextsResIds, final int[] itemsIconsResIds) { mItemsTextsResIds = itemsTextsResIds; mItemsIconsResIds = itemsIconsResIds; if (mItemsTextsResIds != null && mSelectedItemPosition >= 0 && mSelectedItemPosition < mItemsTextsResIds.length) setText(mItemsTextsResIds[mSelectedItemPosition]); TextViewCompat.setCompoundDrawablesRelativeWithIntrinsicBounds(this, null, null, isPopupShown() ? mOpenedDrawable : mClosedDrawable, null); } public boolean isPopupShown() { return mPopupWindow != null && mPopupWindow.isShowing(); } public int getSelectedItemPosition() { return mSelectedItemPosition; } public void setSelectedItemPosition(final int selectedItemPosition) { int lastSelectedItemPosition = mSelectedItemPosition; mSelectedItemPosition = selectedItemPosition; final String itemText = mItemsTextsResIds != null && mSelectedItemPosition >= 0 && mSelectedItemPosition < mItemsTextsResIds.length ? getResources().getString(mItemsTextsResIds[mSelectedItemPosition]) : null; setText(itemText); TextViewCompat.setCompoundDrawablesRelativeWithIntrinsicBounds(FullSizePopupSpinner.this, null, null, mClosedDrawable, null); if (mOnItemSelectedListener != null) mOnItemSelectedListener.onItemSelected(FullSizePopupSpinner.this, selectedItemPosition, itemText, lastSelectedItemPosition); } public void setOnItemSelectedListener(OnItemSelectedListener onItemSelectedListener) { mOnItemSelectedListener = onItemSelectedListener; } @Override protected void onDetachedFromWindow() { super.onDetachedFromWindow(); if (mPopupWindow != null) mPopupWindow.dismissRightAway(); } protected void init(final Context context) { if (mInitialized) return; mInitialized = true; setSaveEnabled(true); mClosedDrawable = ResourcesCompat.getDrawable(getResources(), R.drawable.drop_down_menu_ic_arrow_down, null); mOpenedDrawable = ViewUtil.getRotateDrawable(mClosedDrawable, 180); TextViewCompat.setCompoundDrawablesRelativeWithIntrinsicBounds(FullSizePopupSpinner.this, null, null, mClosedDrawable, null); setOnClickListener(new OnClickListener() { @Override public void onClick(final View v) { if (mItemsTextsResIds == null) return; if (mPopupWindow != null) mPopupWindow.dismissRightAway(); TextViewCompat.setCompoundDrawablesRelativeWithIntrinsicBounds(FullSizePopupSpinner.this, null, null, mOpenedDrawable, null); final LayoutInflater layoutInflater = LayoutInflater.from(context); final View popupView = layoutInflater.inflate(R.layout.spinner_drop_down_popup, null, false); final RecyclerView recyclerView = (RecyclerView) popupView.findViewById(R.id.spinner_drop_down_popup__recyclerView); final View overlayView = popupView.findViewById(R.id.spinner_drop_down_popup__overlay); final View itemsContainer = popupView.findViewById(R.id.spinner_drop_down_popup__itemsContainer); itemsContainer.setPivotY(0); itemsContainer.setScaleY(0); itemsContainer.animate().scaleY(1).setDuration(ANIMATION_DURATION).start(); mPopupWindow = new SpinnerPopupWindow(popupView, LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT, true, overlayView, itemsContainer); mPopupWindow.setOutsideTouchable(true); mPopupWindow.setTouchable(true); mPopupWindow.setBackgroundDrawable(new ColorDrawable(0)); final AtomicBoolean isItemSelected = new AtomicBoolean(false); if (VERSION.SDK_INT >= VERSION_CODES.LOLLIPOP) { popupView.findViewById(R.id.spinner_drop_down_popup__preLollipopShadow).setVisibility(View.GONE); recyclerView.setBackgroundColor(0xFFffffff); } recyclerView.setLayoutManager(new LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false)); recyclerView.setAdapter(new Adapter() { @Override public ViewHolder onCreateViewHolder(final ViewGroup parent, final int viewType) { final View itemView = layoutInflater.inflate(R.layout.spinner_drop_down_popup_item, recyclerView, false); final ViewHolder holder = new ViewHolder(itemView) { }; itemView.setOnClickListener(new OnClickListener() { @Override public void onClick(final View v) { isItemSelected.set(true); mPopupWindow.dismiss(); setSelectedItemPosition(holder.getAdapterPosition()); } }); return holder; } @Override public void onBindViewHolder(final ViewHolder holder, final int position) { final String itemText = getResources().getString(mItemsTextsResIds[position]); final TextView textView = (TextView) holder.itemView.findViewById(android.R.id.text1); textView.setText(itemText); if (mItemsIconsResIds != null) TextViewCompat.setCompoundDrawablesRelativeWithIntrinsicBounds(textView, mItemsIconsResIds[position], 0, position == mSelectedItemPosition ? R.drawable.drop_down_menu_ic_v : 0, 0); else TextViewCompat.setCompoundDrawablesRelativeWithIntrinsicBounds(textView, 0, 0, position == mSelectedItemPosition ? R.drawable.drop_down_menu_ic_v : 0, 0); } @Override public int getItemCount() { return mItemsTextsResIds.length; } }); overlayView.setOnClickListener(new OnClickListener() { @Override public void onClick(final View v) { mPopupWindow.dismiss(); } }); overlayView.setAlpha(0); overlayView.animate().alpha(1).setDuration(ANIMATION_DURATION).start(); mPopupWindow.setOnDismissListener(new OnDismissListener() { @Override public void onDismiss() { TextViewCompat.setCompoundDrawablesRelativeWithIntrinsicBounds(FullSizePopupSpinner.this, null, null, mClosedDrawable, null); if (!isItemSelected.get() && mOnItemSelectedListener != null) mOnItemSelectedListener.onNothingSelected(FullSizePopupSpinner.this); } }); // optional: set animation style. look here for more info: http://stackoverflow.com/q/9648797/878126 mPopupWindow.setAnimationStyle(0); PopupWindowCompat.showAsDropDown(mPopupWindow, v, 0, 0, Gravity.TOP); } }); } static class SpinnerPopupWindow extends PopupWindow { private final View mOverlayView; private final View mLayout; public SpinnerPopupWindow(final View contentView, final int width, final int height, final boolean focusable, View overlayView, View layout) { super(contentView, width, height, focusable); mOverlayView = overlayView; mLayout = layout; } public void dismissRightAway() { super.dismiss(); } @Override public void dismiss() { final ViewPropertyAnimator animator = mOverlayView.animate().alpha(0); mLayout.setPivotY(0); mLayout.animate().scaleY(0).setDuration(ANIMATION_DURATION); ViewUtil.runOnAnimationEnd(animator, new Runnable() { @Override public void run() { dismissRightAway(); } }); animator.start(); } } ////////////////////////////////////// //SavedState// ////////////// static class SavedState extends BaseSavedState { private int[] mItemsTextsResIds; private int mSelectedItemPosition = -1; public int[] mItemsIconsResIds; SavedState(Parcelable superState) { super(superState); } private SavedState(@NonNull Parcel in) { super(in); this.mItemsTextsResIds = in.createIntArray(); mSelectedItemPosition = in.readInt(); mItemsIconsResIds = in.createIntArray(); } @Override public void writeToParcel(@NonNull Parcel out, int flags) { super.writeToParcel(out, flags); out.writeIntArray(mItemsTextsResIds); out.writeInt(mSelectedItemPosition); out.writeIntArray(mItemsIconsResIds); } //required field that makes Parcelables from a Parcel public static final Creator<SavedState> CREATOR = new Creator<SavedState>() { public SavedState createFromParcel(Parcel in) { return new SavedState(in); } public SavedState[] newArray(int size) { return new SavedState[size]; } }; } } 

Spinner_drop_down_popup.xml

 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:clipToPadding="false"> <View android:id="@+id/spinner_drop_down_popup__overlay" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#33000000"/> <LinearLayout android:id="@+id/spinner_drop_down_popup__itemsContainer" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical"> <android.support.v7.widget.RecyclerView android:id="@+id/spinner_drop_down_popup__recyclerView" android:layout_width="match_parent" android:layout_height="wrap_content" android:elevation="8dp" android:gravity="center"/> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="@drawable/list_view_horizontal_divider"/> <FrameLayout android:id="@+id/spinner_drop_down_popup__preLollipopShadow" android:layout_width="match_parent" android:layout_height="wrap_content" android:foreground="?android:windowContentOverlay"/> </LinearLayout> </FrameLayout> 

Intentaría evitar utilizar PopupWindow e intentar utilizar android.support.v7.widget.ListPopupWindow .

También una de las primeras cosas para comprobar con tales problemas es targetSdk y appCompat versión de la biblioteca están al día y corresponden a la versión de Android que está tratando de ejecutar su aplicación.