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

android-spinner android-popupwindow

Question

Fondo

Tuve que crear una vista similar a un girador, que tiene este comportamiento:

• textView que contiene el texto del elemento seleccionado, con un icono de flecha a la derecha que indica si está en estado "abierto".
• al hacer clic en la vista, aparece un menú emergente debajo de ella (no en la parte superior), que muestra una lista de elementos para elegir y también tiene marcado el elemento seleccionado.
• Alrededor de la ventana emergente, hay un color negro semitransparente.
• Tiene una animación personalizada para abrirla y cerrarla.

El problema

He logrado hacer esta vista (código a continuación), pero por alguna razón, en Android 7.1, tengo el menú emergente que aparece en la parte superior de la vista (incluso superponiéndolo y las vistas por encima), en lugar de debajo, como debería . Así es como se ve, y cómo debería verse:

Como es bastante código y recursos, lo puse todo en un repositorio de Github ( here ), pero aquí está la parte principal del código (mis intentos de corregirlo están en los comentarios):

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);
                LayoutInflater layoutInflater = LayoutInflater.from(context);
                final View popupView = layoutInflater.inflate(R.layout.spinner_drop_down_popup, null, false);
                final LinearLayout linearLayout = (LinearLayout) popupView.findViewById(R.id.spinner_drop_down_popup__itemsContainer);
                final View overlayView = popupView.findViewById(R.id.spinner_drop_down_popup__overlay);
                linearLayout.setPivotY(0);
                linearLayout.setScaleY(0);
                linearLayout.animate().scaleY(1).setDuration(ANIMATION_DURATION).start();
                mPopupWindow = new SpinnerPopupWindow(popupView, LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, true, overlayView, linearLayout);
                mPopupWindow.setOutsideTouchable(true);
                mPopupWindow.setTouchable(true);
                mPopupWindow.setBackgroundDrawable(new ColorDrawable(0));
                //PopupWindowCompat.setOverlapAnchor(mPopupWindow, false);
                //if (VERSION.SDK_INT >= VERSION_CODES.M)
                //    mPopupWindow.setOverlapAnchor(false);
                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);
                    linearLayout.setBackgroundColor(0xFFffffff);
                }
                for (int i = 0; i < mItemsTextsResIds.length; ++i) {
                    final String itemText = getResources().getString(mItemsTextsResIds[i]);
                    final int position = i;
                    View itemView = layoutInflater.inflate(R.layout.spinner_drop_down_popup_item, linearLayout, false);
                    final TextView textView = (TextView) 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);

                    linearLayout.addView(itemView, linearLayout.getChildCount() - 2);
                    itemView.setOnClickListener(new OnClickListener() {
                        @Override
                        public void onClick(final View v) {
                            isItemSelected.set(true);
                            mPopupWindow.dismiss();
                            setSelectedItemPosition(position);
                        }
                    });
                }
                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);
                //mPopupWindow.showAsDropDown(v, 0, 0, Gravity.TOP);
                mPopupWindow.showAsDropDown(v, 0, 0);
            }
        });

    }

    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];
                    }
                };
    }
}

Lo que he intentado

Intenté llamar a las siguientes funciones (y combinaciones), pero ninguna ayudó:

• mPopupWindow.setOverlapAnchor (false);

• PopupWindowCompat.setOverlapAnchor (mPopupWindow, false);

• mPopupWindow.showAsDropDown (v, 0, 0, Gravity.BOTTOM);

• PopupWindowCompat.showAsDropDown (mPopupWindow, v, 0, 0, Gravity.BOTTOM);

• mPopupWindow.showAsDropDown (v, 0, 0, Gravity.TOP);

• PopupWindowCompat.showAsDropDown (mPopupWindow, v, 0, 0, Gravity.TOP);

La pregunta

¿Por qué aparece la ventana emergente en la parte superior de la vista? ¿Cómo puedo evitar esto y seguir teniendo la ventana debajo de la vista, como se hizo antes?

¿Hay tal vez un error en Android 7.1, que causa este comportamiento? ¿Cómo puedo superar esto?

Answer 1

Bien, 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 versiones anteriores.

Aquí está el código actual (actualizado el repositorio de github, el código original con el problema se puede encontrar code.google.com/p/android/issues/detail?id=233237 ):

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>

Answer 2

Intentaría evitar el uso de PopupWindow e intentar usar android.support.v7.widget.ListPopupWindow lugar.

Además, una de las primeras cosas que se debe comprobar con este tipo de problemas es que targetSdk y la versión de la biblioteca appCompat están actualizadas y corresponden a la versión de Android en la que está intentando ejecutar su aplicación.