add bunch of new java APIs: mostly stubs or copied from AOSP

Many of these classes are only needed to be subclassed by androidx
support library, which is used in many android apps

src/api-impl/android/widget/AdapterView.java

@@ -0,0 +1,12 @@
+package android.widget;
+
+import android.view.ViewGroup;
+
+public abstract class AdapterView extends ViewGroup {
+
+	public interface OnItemSelectedListener {
+	}
+
+	public interface OnItemClickListener {
+	}
+}

src/api-impl/android/widget/Button.java

@@ -0,0 +1,17 @@
+package android.widget;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+
+public class Button extends View {
+
+	public Button(Context context) {
+		super(context);
+	}
+
+	public Button(Context context, AttributeSet attributeSet) {
+		super(context, attributeSet);
+	}
+
+}

src/api-impl/android/widget/CompoundButton.java

@@ -0,0 +1,17 @@
+package android.widget;
+
+import android.content.Context;
+import android.util.AttributeSet;
+
+public abstract class CompoundButton extends Button {
+    
+    public CompoundButton(Context context) {
+        super(context);
+    }
+    
+    public CompoundButton(Context context, AttributeSet attributeSet) {
+        super(context, attributeSet);
+    }
+
+    public static interface OnCheckedChangeListener {}
+}

src/api-impl/android/widget/EdgeEffect.java

@@ -0,0 +1,17 @@
+package android.widget;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+
+public class EdgeEffect extends View {
+
+	public EdgeEffect(Context context) {
+		super(context);
+	}
+
+	public EdgeEffect(Context context, AttributeSet attributeSet) {
+		super(context, attributeSet);
+	}
+
+}

src/api-impl/android/widget/FrameLayout.java

@@ -20,6 +20,12 @@ public class FrameLayout extends ViewGroup {
 		native_constructor(context);
 	}
 
+	public FrameLayout(Context context, AttributeSet attrs, int defStyleAttr) {
+		super(context, attrs, defStyleAttr);
+
+		native_constructor(attrs);
+	}
+
 	public native void native_constructor(AttributeSet attrs);
 	public native void native_constructor(Context context);
 
@@ -30,7 +36,16 @@ public class FrameLayout extends ViewGroup {
 		addView(child, index, null);
 	}
 
+	@Override
+	public LayoutParams generateLayoutParams(AttributeSet attrs) {
+		return new LayoutParams(getContext(), attrs);
+	}
+
 	public static class LayoutParams extends ViewGroup.MarginLayoutParams {
+		public LayoutParams (Context c, AttributeSet attrs) {
+			super(c, attrs);
+		}
+
 		public LayoutParams(int width, int height) {
 			super(width, height);
 		}

src/api-impl/android/widget/HorizontalScrollView.java

@@ -0,0 +1,18 @@
+package android.widget;
+
+import android.content.Context;
+import android.util.AttributeSet;
+
+public class HorizontalScrollView extends FrameLayout {
+
+	public HorizontalScrollView(Context context) {
+		super(context);
+	}
+
+	public HorizontalScrollView(Context context, AttributeSet attributeSet) {
+		super(context, attributeSet);
+	}
+
+	public void setHorizontalScrollBarEnabled(boolean enabled) {}
+
+}

src/api-impl/android/widget/ImageButton.java

@@ -0,0 +1,20 @@
+package android.widget;
+
+import android.content.Context;
+import android.util.AttributeSet;
+
+public class ImageButton extends ImageView {
+
+	public ImageButton(Context context) {
+		super(context);
+	}
+
+	public ImageButton(Context context, AttributeSet attributeSet) {
+		super(context, attributeSet);
+	}
+
+	public ImageButton(Context context, AttributeSet attributeSet, int defStyleAttr) {
+		super(context, attributeSet, defStyleAttr);
+	}
+
+}

src/api-impl/android/widget/ImageView.java

@@ -16,9 +16,11 @@ public class ImageView extends View {
 		super(context, attrs);
 
 		native_constructor(attrs);
-		int resource = attrs.getAttributeResourceValue("http://schemas.android.com/apk/res/android", "src", 0);
-		if (resource != 0)
-			setImageResource(resource);
+		if (attrs != null) {
+			int resource = attrs.getAttributeResourceValue("http://schemas.android.com/apk/res/android", "src", 0);
+			if (resource != 0)
+				setImageResource(resource);
+		}
 	}
 
 	public ImageView(Context context) {
@@ -51,6 +53,8 @@ public class ImageView extends View {
 		return new BitmapDrawable(getContext().getResources(), bitmap);
 	}
 
+	public void setImageDrawable(Drawable drawable) {}
+
 	/**
 	 * Options for scaling the bounds of an image to the bounds of this view.
 	 */

src/api-impl/android/widget/LinearLayout.java

@@ -4,7 +4,6 @@ import android.content.Context;
 import android.util.AttributeSet;
 import android.view.View;
 import android.view.ViewGroup;
-import android.view.ViewGroup.LayoutParams;
 
 public class LinearLayout extends ViewGroup {
 

src/api-impl/android/widget/ListView.java

@@ -0,0 +1,17 @@
+package android.widget;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+
+public class ListView extends View {
+
+	public ListView(Context context) {
+		super(context);
+	}
+
+	public ListView(Context context, AttributeSet attributeSet) {
+		super(context, attributeSet);
+	}
+
+}

src/api-impl/android/widget/OverScroller.java

@@ -0,0 +1,14 @@
+package android.widget;
+
+import android.content.Context;
+import android.view.ViewGroup;
+import android.view.animation.Interpolator;
+
+public class OverScroller extends ViewGroup {
+
+	public OverScroller(Context context, Interpolator interpolator) {
+		super(context);
+	}
+
+	public void abortAnimation () {}
+}

src/api-impl/android/widget/PopupMenu.java

@@ -0,0 +1,146 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.widget;
+
+import android.content.Context;
+import android.view.Gravity;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.View.OnTouchListener;
+import com.android.internal.R;
+
+/**
+ * A PopupMenu displays a {@link Menu} in a modal popup window anchored to a
+ * {@link View}. The popup will appear below the anchor view if there is room,
+ * or above it if there is not. If the IME is visible the popup will not
+ * overlap it until it is touched. Touching outside of the popup will dismiss
+ * it.
+ */
+
+public class PopupMenu {
+	private final Context mContext;
+	private final View mAnchor;
+	private OnMenuItemClickListener mMenuItemClickListener;
+	private OnDismissListener mOnDismissListener;
+	private OnTouchListener mDragListener;
+	/**
+	 * Constructor to create a new popup menu with an anchor view.
+	 *
+	 * @param context Context the popup menu is running in, through which it
+	 *        can access the current theme, resources, etc.
+	 * @param anchor Anchor view for this popup. The popup will appear below
+	 *        the anchor if there is room, or above it if there is not.
+	 */
+	public PopupMenu(Context context, View anchor) {
+		this(context, anchor, Gravity.NO_GRAVITY);
+	}
+	/**
+	 * Constructor to create a new popup menu with an anchor view and alignment
+	 * gravity.
+	 *
+	 * @param context Context the popup menu is running in, through which it
+	 *        can access the current theme, resources, etc.
+	 * @param anchor Anchor view for this popup. The popup will appear below
+	 *        the anchor if there is room, or above it if there is not.
+	 * @param gravity The {@link Gravity} value for aligning the popup with its
+	 *        anchor.
+	 */
+	public PopupMenu(Context context, View anchor, int gravity) {
+		this(context, anchor, gravity, R.attr.popupMenuStyle, 0);
+	}
+	/**
+	 * Constructor a create a new popup menu with a specific style.
+	 *
+	 * @param context Context the popup menu is running in, through which it
+	 *        can access the current theme, resources, etc.
+	 * @param anchor Anchor view for this popup. The popup will appear below
+	 *        the anchor if there is room, or above it if there is not.
+	 * @param gravity The {@link Gravity} value for aligning the popup with its
+	 *        anchor.
+	 * @param popupStyleAttr An attribute in the current theme that contains a
+	 *        reference to a style resource that supplies default values for
+	 *        the popup window. Can be 0 to not look for defaults.
+	 * @param popupStyleRes A resource identifier of a style resource that
+	 *        supplies default values for the popup window, used only if
+	 *        popupStyleAttr is 0 or can not be found in the theme. Can be 0
+	 *        to not look for defaults.
+	 */
+	public PopupMenu(Context context, View anchor, int gravity, int popupStyleAttr,
+			int popupStyleRes) {
+		mContext = context;
+		mAnchor = anchor;
+	}
+
+	/**
+	 * @return a {@link MenuInflater} that can be used to inflate menu items
+	 *         from XML into the menu returned by {@link #getMenu()}
+	 * @see #getMenu()
+	 */
+	public MenuInflater getMenuInflater() {
+		return new MenuInflater(mContext);
+	}
+
+	/**
+	 * Sets a listener that will be notified when the user selects an item from
+	 * the menu.
+	 *
+	 * @param listener the listener to notify
+	 */
+	public void setOnMenuItemClickListener(OnMenuItemClickListener listener) {
+		mMenuItemClickListener = listener;
+	}
+
+	/**
+	 * Sets a listener that will be notified when this menu is dismissed.
+	 *
+	 * @param listener the listener to notify
+	 */
+	public void setOnDismissListener(OnDismissListener listener) {
+		mOnDismissListener = listener;
+	}
+
+	/**
+	 * Interface responsible for receiving menu item click events if the items
+	 * themselves do not have individual item click listeners.
+	 */
+	public interface OnMenuItemClickListener {
+		/**
+		 * This method will be invoked when a menu item is clicked if the item
+		 * itself did not already handle the event.
+		 *
+		 * @param item the menu item that was clicked
+		 * @return {@code true} if the event was handled, {@code false}
+		 *         otherwise
+		 */
+		boolean onMenuItemClick(MenuItem item);
+	}
+
+	/**
+	 * Callback interface used to notify the application that the menu has closed.
+	 */
+	public interface OnDismissListener {
+		/**
+		 * Called when the associated menu has been dismissed.
+		 *
+		 * @param menu the popup menu that was dismissed
+		 */
+		void onDismiss(PopupMenu menu);
+	}
+
+}

src/api-impl/android/widget/Scroller.java

@@ -0,0 +1,22 @@
+package android.widget;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.animation.Interpolator;
+
+public class Scroller extends View {
+
+	public Scroller(Context context) {
+		super(context);
+	}
+
+	public Scroller(Context context, AttributeSet attributeSet) {
+		super(context, attributeSet);
+	}
+
+	public Scroller(Context context, Interpolator interpolator) {
+		this(context);
+	}
+
+}

src/api-impl/android/widget/SeekBar.java

@@ -0,0 +1,20 @@
+package android.widget;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+
+public class SeekBar extends View {
+
+	public SeekBar(Context context) {
+		super(context);
+	}
+
+	public SeekBar(Context context, AttributeSet attributeSet) {
+		super(context, attributeSet);
+	}
+
+	public interface OnSeekBarChangeListener {
+	}
+
+}

src/api-impl/android/widget/TextView.java

@@ -6,7 +6,9 @@ import android.content.res.TypedArray;
 import android.graphics.Typeface;
 import android.text.InputFilter;
 import android.text.TextPaint;
+import android.text.TextUtils;
 import android.text.TextWatcher;
+import android.text.method.TransformationMethod;
 import android.util.AttributeSet;
 import android.view.View;
 
@@ -29,6 +31,10 @@ public class TextView extends View {
 		native_constructor(context);
 	}
 
+	public TextView(Context context, AttributeSet attrs, int defStyleAttr) {
+		this(context, attrs);
+	}
+
 	native void native_constructor(AttributeSet attrs);
 	native void native_constructor(Context context);
 
@@ -76,6 +82,24 @@ public class TextView extends View {
 	public void addTextChangedListener(TextWatcher watcher) {}
 	public void setOnEditorActionListener(TextView.OnEditorActionListener l) {}
 
+	public TransformationMethod getTransformationMethod() {
+		return null;
+	}
+
+	public void setHintTextColor(ColorStateList colorStateList) {}
+	public void setLinkTextColor(ColorStateList colorStateList) {}
+
+	public void setSingleLine() {}
+
+	public void setEllipsize(TextUtils.TruncateAt truncateAt) {}
+
+	public void setTextAppearance(Context context, int appearance) {}
+
+	public void setMaxLines(int maxLines) {}
+
+	public void setMinWidth(int minWidth) {}
+	public void setMaxWidth(int maxWidth) {}
+
 	public static interface OnEditorActionListener {
 	}
 }