Merge "Make RelativeLayout aware of layout direction" (b6a45cb9) · Commits · e / os / android_frameworks_base

api/current.txt

+15 −0

Original line number	Diff line number	Diff line
		@@ -607,12 +607,16 @@ package android {
		field public static final int layout_above = 16843140; // 0x1010184
		field public static final int layout_alignBaseline = 16843142; // 0x1010186
		field public static final int layout_alignBottom = 16843146; // 0x101018a
		field public static final int layout_alignEnd = 16843706; // 0x10103ba
		field public static final int layout_alignLeft = 16843143; // 0x1010187
		field public static final int layout_alignParentBottom = 16843150; // 0x101018e
		field public static final int layout_alignParentEnd = 16843708; // 0x10103bc
		field public static final int layout_alignParentLeft = 16843147; // 0x101018b
		field public static final int layout_alignParentRight = 16843149; // 0x101018d
		field public static final int layout_alignParentStart = 16843707; // 0x10103bb
		field public static final int layout_alignParentTop = 16843148; // 0x101018c
		field public static final int layout_alignRight = 16843145; // 0x1010189
		field public static final int layout_alignStart = 16843705; // 0x10103b9
		field public static final int layout_alignTop = 16843144; // 0x1010188
		field public static final int layout_alignWithParentIfMissing = 16843154; // 0x1010192
		field public static final int layout_below = 16843141; // 0x1010185
		@@ -634,8 +638,10 @@ package android {
		field public static final int layout_rowSpan = 16843644; // 0x101037c
		field public static final int layout_scale = 16843155; // 0x1010193
		field public static final int layout_span = 16843085; // 0x101014d
		field public static final int layout_toEndOf = 16843704; // 0x10103b8
		field public static final int layout_toLeftOf = 16843138; // 0x1010182
		field public static final int layout_toRightOf = 16843139; // 0x1010183
		field public static final int layout_toStartOf = 16843703; // 0x10103b7
		field public static final int layout_weight = 16843137; // 0x1010181
		field public static final int layout_width = 16842996; // 0x10100f4
		field public static final int layout_x = 16843135; // 0x101017f
		@@ -25096,9 +25102,12 @@ package android.view {
		ctor public ViewGroup.MarginLayoutParams(int, int);
		ctor public ViewGroup.MarginLayoutParams(android.view.ViewGroup.MarginLayoutParams);
		ctor public ViewGroup.MarginLayoutParams(android.view.ViewGroup.LayoutParams);
		method public int getLayoutDirection();
		method public int getMarginEnd();
		method public int getMarginStart();
		method protected boolean isLayoutRtl();
		method public boolean isMarginRelative();
		method public void setLayoutDirection(int);
		method public void setMargins(int, int, int, int);
		field public int bottomMargin;
		field public int endMargin;
		@@ -28399,19 +28408,25 @@ package android.widget {
		field public static final int ABOVE = 2; // 0x2
		field public static final int ALIGN_BASELINE = 4; // 0x4
		field public static final int ALIGN_BOTTOM = 8; // 0x8
		field public static final int ALIGN_END = 19; // 0x13
		field public static final int ALIGN_LEFT = 5; // 0x5
		field public static final int ALIGN_PARENT_BOTTOM = 12; // 0xc
		field public static final int ALIGN_PARENT_END = 21; // 0x15
		field public static final int ALIGN_PARENT_LEFT = 9; // 0x9
		field public static final int ALIGN_PARENT_RIGHT = 11; // 0xb
		field public static final int ALIGN_PARENT_START = 20; // 0x14
		field public static final int ALIGN_PARENT_TOP = 10; // 0xa
		field public static final int ALIGN_RIGHT = 7; // 0x7
		field public static final int ALIGN_START = 18; // 0x12
		field public static final int ALIGN_TOP = 6; // 0x6
		field public static final int BELOW = 3; // 0x3
		field public static final int CENTER_HORIZONTAL = 14; // 0xe
		field public static final int CENTER_IN_PARENT = 13; // 0xd
		field public static final int CENTER_VERTICAL = 15; // 0xf
		field public static final int END_OF = 17; // 0x11
		field public static final int LEFT_OF = 0; // 0x0
		field public static final int RIGHT_OF = 1; // 0x1
		field public static final int START_OF = 16; // 0x10
		field public static final int TRUE = -1; // 0xffffffff
		}

core/java/android/view/ViewGroup.java

+35 −8

Original line number	Diff line number	Diff line
		@@ -5504,13 +5504,17 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager

		/**
		* The default start and end margin.
		* @hide
		*/
		static private final int DEFAULT_RELATIVE = Integer.MIN_VALUE;
		public static final int DEFAULT_RELATIVE = Integer.MIN_VALUE;

		private int initialLeftMargin;
		private int initialRightMargin;

		private int layoutDirection;
		private static int LAYOUT_DIRECTION_UNDEFINED = -1;

		// Layout direction undefined by default
		private int layoutDirection = LAYOUT_DIRECTION_UNDEFINED;

		/**
		* Creates a new set of layout parameters. The values are extracted from
		@@ -5553,9 +5557,6 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
		initialLeftMargin = leftMargin;
		initialRightMargin = rightMargin;

		// LTR by default
		layoutDirection = View.LAYOUT_DIRECTION_LTR;

		a.recycle();
		}

		@@ -5585,7 +5586,7 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
		this.initialLeftMargin = source.leftMargin;
		this.initialRightMargin = source.rightMargin;

		this.layoutDirection = source.layoutDirection;
		setLayoutDirection(source.layoutDirection);
		}

		/**
		@@ -5688,19 +5689,41 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
		* @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginStart
		* @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginEnd
		*
		* @return true if either marginStart or marginEnd has been set
		* @return true if either marginStart or marginEnd has been set.
		*/
		public boolean isMarginRelative() {
		return (startMargin != DEFAULT_RELATIVE) \|\| (endMargin != DEFAULT_RELATIVE);
		}

		/**
		* Set the layout direction
		* @param layoutDirection the layout direction.
		* Should be either {@link View#LAYOUT_DIRECTION_LTR}
		* or {@link View#LAYOUT_DIRECTION_RTL}.
		*/
		public void setLayoutDirection(int layoutDirection) {
		if (layoutDirection != View.LAYOUT_DIRECTION_LTR &&
		layoutDirection != View.LAYOUT_DIRECTION_RTL) return;
		this.layoutDirection = layoutDirection;
		}

		/**
		* Retuns the layout direction. Can be either {@link View#LAYOUT_DIRECTION_LTR} or
		* {@link View#LAYOUT_DIRECTION_RTL}.
		*
		* @return the layout direction.
		*/
		public int getLayoutDirection() {
		return layoutDirection;
		}

		/**
		* This will be called by {@link android.view.View#requestLayout()}. Left and Right margins
		* may be overridden depending on layout direction.
		*/
		@Override
		public void onResolveLayoutDirection(int layoutDirection) {
		this.layoutDirection = layoutDirection;
		setLayoutDirection(layoutDirection);

		if (!isMarginRelative()) return;

		@@ -5717,6 +5740,10 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
		}
		}

		protected boolean isLayoutRtl() {
		return (layoutDirection == View.LAYOUT_DIRECTION_RTL);
		}

		/**
		* @hide
		*/

core/java/android/widget/RelativeLayout.java

+183 −22

Original line number	Diff line number	Diff line
		@@ -149,8 +149,34 @@ public class RelativeLayout extends ViewGroup {
		* bounds of its RelativeLayout parent.
		*/
		public static final int CENTER_VERTICAL = 15;
		/**
		* Rule that aligns a child's end edge with another child's start edge.
		*/
		public static final int START_OF = 16;
		/**
		* Rule that aligns a child's start edge with another child's end edge.
		*/
		public static final int END_OF = 17;
		/**
		* Rule that aligns a child's start edge with another child's start edge.
		*/
		public static final int ALIGN_START = 18;
		/**
		* Rule that aligns a child's end edge with another child's end edge.
		*/
		public static final int ALIGN_END = 19;
		/**
		* Rule that aligns the child's start edge with its RelativeLayout
		* parent's start edge.
		*/
		public static final int ALIGN_PARENT_START = 20;
		/**
		* Rule that aligns the child's end edge with its RelativeLayout
		* parent's end edge.
		*/
		public static final int ALIGN_PARENT_END = 21;

		private static final int VERB_COUNT = 16;
		private static final int VERB_COUNT = 22;


		private static final int[] RULES_VERTICAL = {
		@@ -158,13 +184,13 @@ public class RelativeLayout extends ViewGroup {
		};

		private static final int[] RULES_HORIZONTAL = {
		LEFT_OF, RIGHT_OF, ALIGN_LEFT, ALIGN_RIGHT
		LEFT_OF, RIGHT_OF, ALIGN_LEFT, ALIGN_RIGHT, START_OF, END_OF, ALIGN_START, ALIGN_END
		};

		private View mBaselineView = null;
		private boolean mHasBaselineAlignedChild;

		private int mGravity = Gravity.LEFT \| Gravity.TOP;
		private int mGravity = Gravity.START \| Gravity.TOP;
		private final Rect mContentBounds = new Rect();
		private final Rect mSelfBounds = new Rect();
		private int mIgnoreGravity;
		@@ -204,7 +230,7 @@ public class RelativeLayout extends ViewGroup {

		/**
		* Defines which View is ignored when the gravity is applied. This setting has no
		* effect if the gravity is <code>Gravity.LEFT \| Gravity.TOP</code>.
		* effect if the gravity is <code>Gravity.START \| Gravity.TOP</code>.
		*
		* @param viewId The id of the View to be ignored by gravity, or 0 if no View
		* should be ignored.
		@@ -234,7 +260,7 @@ public class RelativeLayout extends ViewGroup {

		/**
		* Describes how the child views are positioned. Defaults to
		* <code>Gravity.LEFT \| Gravity.TOP</code>.
		* <code>Gravity.START \| Gravity.TOP</code>.
		*
		* <p>Note that since RelativeLayout considers the positioning of each child
		* relative to one another to be significant, setting gravity will affect
		@@ -369,7 +395,7 @@ public class RelativeLayout extends ViewGroup {

		View ignore = null;
		int gravity = mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK;
		final boolean horizontalGravity = gravity != Gravity.LEFT && gravity != 0;
		final boolean horizontalGravity = gravity != Gravity.START && gravity != 0;
		gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
		final boolean verticalGravity = gravity != Gravity.TOP && gravity != 0;

		@@ -457,6 +483,8 @@ public class RelativeLayout extends ViewGroup {
		}
		}

		final int layoutDirection = getResolvedLayoutDirection();

		if (isWrapContentWidth) {
		// Width already has left padding in it since it was calculated by looking at
		// the right of each child view
		@@ -474,7 +502,7 @@ public class RelativeLayout extends ViewGroup {
		View child = getChildAt(i);
		if (child.getVisibility() != GONE) {
		LayoutParams params = (LayoutParams) child.getLayoutParams();
		final int[] rules = params.getRules();
		final int[] rules = params.getRules(layoutDirection);
		if (rules[CENTER_IN_PARENT] != 0 \|\| rules[CENTER_HORIZONTAL] != 0) {
		centerHorizontal(child, params, width);
		} else if (rules[ALIGN_PARENT_RIGHT] != 0) {
		@@ -504,7 +532,7 @@ public class RelativeLayout extends ViewGroup {
		View child = getChildAt(i);
		if (child.getVisibility() != GONE) {
		LayoutParams params = (LayoutParams) child.getLayoutParams();
		final int[] rules = params.getRules();
		final int[] rules = params.getRules(layoutDirection);
		if (rules[CENTER_IN_PARENT] != 0 \|\| rules[CENTER_VERTICAL] != 0) {
		centerVertical(child, params, height);
		} else if (rules[ALIGN_PARENT_BOTTOM] != 0) {
		@@ -523,7 +551,6 @@ public class RelativeLayout extends ViewGroup {
		height - mPaddingBottom);

		final Rect contentBounds = mContentBounds;
		final int layoutDirection = getResolvedLayoutDirection();
		Gravity.apply(mGravity, right - left, bottom - top, selfBounds, contentBounds,
		layoutDirection);

		@@ -551,7 +578,8 @@ public class RelativeLayout extends ViewGroup {
		}

		private void alignBaseline(View child, LayoutParams params) {
		int[] rules = params.getRules();
		final int layoutDirection = getResolvedLayoutDirection();
		int[] rules = params.getRules(layoutDirection);
		int anchorBaseline = getRelatedViewBaseline(rules, ALIGN_BASELINE);

		if (anchorBaseline != -1) {
		@@ -619,7 +647,7 @@ public class RelativeLayout extends ViewGroup {

		/**
		* Get a measure spec that accounts for all of the constraints on this view.
		* This includes size contstraints imposed by the RelativeLayout as well as
		* This includes size constraints imposed by the RelativeLayout as well as
		* the View's desired dimension.
		*
		* @param childStart The left or top field of the child's layout params
		@@ -672,7 +700,7 @@ public class RelativeLayout extends ViewGroup {
		childSpecSize = childSize;
		}
		} else if (childSize == LayoutParams.MATCH_PARENT) {
		// Child wanted to be as big as possible. Give all availble
		// Child wanted to be as big as possible. Give all available
		// space
		childSpecMode = MeasureSpec.EXACTLY;
		childSpecSize = maxAvailable;
		@@ -681,7 +709,7 @@ public class RelativeLayout extends ViewGroup {
		// to communicate available space if we know
		// our max size
		if (maxAvailable >= 0) {
		// We have a maxmum size in this dimension.
		// We have a maximum size in this dimension.
		childSpecMode = MeasureSpec.AT_MOST;
		childSpecSize = maxAvailable;
		} else {
		@@ -699,7 +727,9 @@ public class RelativeLayout extends ViewGroup {
		private boolean positionChildHorizontal(View child, LayoutParams params, int myWidth,
		boolean wrapContent) {

		int[] rules = params.getRules();
		final int layoutDirection = getResolvedLayoutDirection();
		int[] rules = params.getRules(layoutDirection);
		params.onResolveLayoutDirection(layoutDirection);

		if (params.mLeft < 0 && params.mRight >= 0) {
		// Right is fixed, but left varies
		@@ -717,12 +747,19 @@ public class RelativeLayout extends ViewGroup {
		params.mRight = params.mLeft + child.getMeasuredWidth();
		}
		return true;
		} else {
		// This is the default case. For RTL we start from the right and for LTR we start
		// from the left. This will give LEFT/TOP for LTR and RIGHT/TOP for RTL.
		if (isLayoutRtl()) {
		params.mRight = myWidth - mPaddingRight- params.rightMargin;
		params.mLeft = params.mRight - child.getMeasuredWidth();
		} else {
		params.mLeft = mPaddingLeft + params.leftMargin;
		params.mRight = params.mLeft + child.getMeasuredWidth();
		}
		}
		return rules[ALIGN_PARENT_RIGHT] != 0;
		}
		return rules[ALIGN_PARENT_END] != 0;
		}

		private boolean positionChildVertical(View child, LayoutParams params, int myHeight,
		@@ -755,7 +792,8 @@ public class RelativeLayout extends ViewGroup {
		}

		private void applyHorizontalSizeRules(LayoutParams childParams, int myWidth) {
		int[] rules = childParams.getRules();
		final int layoutDirection = getResolvedLayoutDirection();
		int[] rules = childParams.getRules(layoutDirection);
		RelativeLayout.LayoutParams anchorParams;

		// -1 indicated a "soft requirement" in that direction. For example:
		@@ -945,8 +983,8 @@ public class RelativeLayout extends ViewGroup {
		if (child.getVisibility() != GONE) {
		RelativeLayout.LayoutParams st =
		(RelativeLayout.LayoutParams) child.getLayoutParams();
		st.onResolveLayoutDirection(getResolvedLayoutDirection());
		child.layout(st.mLeft, st.mTop, st.mRight, st.mBottom);

		}
		}
		}
		@@ -1061,6 +1099,12 @@ public class RelativeLayout extends ViewGroup {
		* @attr ref android.R.styleable#RelativeLayout_Layout_layout_centerInParent
		* @attr ref android.R.styleable#RelativeLayout_Layout_layout_centerHorizontal
		* @attr ref android.R.styleable#RelativeLayout_Layout_layout_centerVertical
		* @attr ref android.R.styleable#RelativeLayout_Layout_layout_toStartOf
		* @attr ref android.R.styleable#RelativeLayout_Layout_layout_toEndOf
		* @attr ref android.R.styleable#RelativeLayout_Layout_layout_alignStart
		* @attr ref android.R.styleable#RelativeLayout_Layout_layout_alignEnd
		* @attr ref android.R.styleable#RelativeLayout_Layout_layout_alignParentStart
		* @attr ref android.R.styleable#RelativeLayout_Layout_layout_alignParentEnd
		*/
		public static class LayoutParams extends ViewGroup.MarginLayoutParams {
		@ViewDebug.ExportedProperty(category = "layout", resolveId = true, indexMapping = {
		@@ -1079,15 +1123,28 @@ public class RelativeLayout extends ViewGroup {
		@ViewDebug.IntToString(from = CENTER_IN_PARENT, to = "center"),
		@ViewDebug.IntToString(from = CENTER_VERTICAL, to = "centerVertical"),
		@ViewDebug.IntToString(from = LEFT_OF, to = "leftOf"),
		@ViewDebug.IntToString(from = RIGHT_OF, to = "rightOf")
		@ViewDebug.IntToString(from = RIGHT_OF, to = "rightOf"),
		@ViewDebug.IntToString(from = ALIGN_START, to = "alignStart"),
		@ViewDebug.IntToString(from = ALIGN_END, to = "alignEnd"),
		@ViewDebug.IntToString(from = ALIGN_PARENT_START, to = "alignParentStart"),
		@ViewDebug.IntToString(from = ALIGN_PARENT_END, to = "alignParentEnd"),
		@ViewDebug.IntToString(from = START_OF, to = "startOf"),
		@ViewDebug.IntToString(from = END_OF, to = "endOf")
		}, mapping = {
		@ViewDebug.IntToString(from = TRUE, to = "true"),
		@ViewDebug.IntToString(from = 0, to = "false/NO_ID")
		})

		private int[] mRules = new int[VERB_COUNT];
		private int[] mInitialRules = new int[VERB_COUNT];

		private int mLeft, mTop, mRight, mBottom;

		private int mStart = DEFAULT_RELATIVE;
		private int mEnd = DEFAULT_RELATIVE;

		private boolean mRulesChanged = false;

		/**
		* When true, uses the parent as the anchor if the anchor doesn't exist or if
		* the anchor's visibility is GONE.
		@@ -1102,6 +1159,7 @@ public class RelativeLayout extends ViewGroup {
		com.android.internal.R.styleable.RelativeLayout_Layout);

		final int[] rules = mRules;
		final int[] initialRules = mInitialRules;

		final int N = a.getIndexCount();
		for (int i = 0; i < N; i++) {
		@@ -1158,7 +1216,29 @@ public class RelativeLayout extends ViewGroup {
		case com.android.internal.R.styleable.RelativeLayout_Layout_layout_centerVertical:
		rules[CENTER_VERTICAL] = a.getBoolean(attr, false) ? TRUE : 0;
		break;
		case com.android.internal.R.styleable.RelativeLayout_Layout_layout_toStartOf:
		rules[START_OF] = a.getResourceId(attr, 0);
		break;
		case com.android.internal.R.styleable.RelativeLayout_Layout_layout_toEndOf:
		rules[END_OF] = a.getResourceId(attr, 0);
		break;
		case com.android.internal.R.styleable.RelativeLayout_Layout_layout_alignStart:
		rules[ALIGN_START] = a.getResourceId(attr, 0);
		break;
		case com.android.internal.R.styleable.RelativeLayout_Layout_layout_alignEnd:
		rules[ALIGN_END] = a.getResourceId(attr, 0);
		break;
		case com.android.internal.R.styleable.RelativeLayout_Layout_layout_alignParentStart:
		rules[ALIGN_PARENT_START] = a.getBoolean(attr, false) ? TRUE : 0;
		break;
		case com.android.internal.R.styleable.RelativeLayout_Layout_layout_alignParentEnd:
		rules[ALIGN_PARENT_END] = a.getBoolean(attr, false) ? TRUE : 0;
		break;
		}
		}

		for (int n = LEFT_OF; n < VERB_COUNT; n++) {
		initialRules[n] = rules[n];
		}

		a.recycle();
		@@ -1192,7 +1272,7 @@ public class RelativeLayout extends ViewGroup {
		* Adds a layout rule to be interpreted by the RelativeLayout. This
		* method should only be used for constraints that don't refer to another sibling
		* (e.g., CENTER_IN_PARENT) or take a boolean value ({@link RelativeLayout#TRUE}
		* for true or - for false). To specify a verb that takes a subject, use
		* for true or 0 for false). To specify a verb that takes a subject, use
		* {@link #addRule(int, int)} instead.
		*
		* @param verb One of the verbs defined by
		@@ -1202,6 +1282,8 @@ public class RelativeLayout extends ViewGroup {
		*/
		public void addRule(int verb) {
		mRules[verb] = TRUE;
		mInitialRules[verb] = TRUE;
		mRulesChanged = true;
		}

		/**
		@@ -1220,12 +1302,73 @@ public class RelativeLayout extends ViewGroup {
		*/
		public void addRule(int verb, int anchor) {
		mRules[verb] = anchor;
		mInitialRules[verb] = anchor;
		mRulesChanged = true;
		}

		private boolean hasRelativeRules() {
		return (mInitialRules[START_OF] != 0 \|\| mInitialRules[END_OF] != 0 \|\|
		mInitialRules[ALIGN_START] != 0 \|\| mInitialRules[ALIGN_END] != 0 \|\|
		mInitialRules[ALIGN_PARENT_START] != 0 \|\| mInitialRules[ALIGN_PARENT_END] != 0);
		}

		private void resolveRules(int layoutDirection) {
		final boolean isLayoutRtl = (layoutDirection == View.LAYOUT_DIRECTION_RTL);
		// Reset to initial state
		for (int n = LEFT_OF; n < VERB_COUNT; n++) {
		mRules[n] = mInitialRules[n];
		}
		// Apply rules depending on direction
		if (mRules[ALIGN_START] != 0) {
		mRules[isLayoutRtl ? ALIGN_RIGHT : ALIGN_LEFT] = mRules[ALIGN_START];
		}
		if (mRules[ALIGN_END] != 0) {
		mRules[isLayoutRtl ? ALIGN_LEFT : ALIGN_RIGHT] = mRules[ALIGN_END];
		}
		if (mRules[START_OF] != 0) {
		mRules[isLayoutRtl ? RIGHT_OF : LEFT_OF] = mRules[START_OF];
		}
		if (mRules[END_OF] != 0) {
		mRules[isLayoutRtl ? LEFT_OF : RIGHT_OF] = mRules[END_OF];
		}
		if (mRules[ALIGN_PARENT_START] != 0) {
		mRules[isLayoutRtl ? ALIGN_PARENT_RIGHT : ALIGN_PARENT_LEFT] = mRules[ALIGN_PARENT_START];
		}
		if (mRules[ALIGN_PARENT_END] != 0) {
		mRules[isLayoutRtl ? ALIGN_PARENT_LEFT : ALIGN_PARENT_RIGHT] = mRules[ALIGN_PARENT_END];
		}
		mRulesChanged = false;
		}

		/**
		* Retrieves a complete list of all supported rules, where the index is the rule
		* verb, and the element value is the value specified, or "false" if it was never
		* set. If there are relative rules defined (_START / _END), they will be resolved
		* depending on the layout direction.
		*
		* @param layoutDirection the direction of the layout.
		* Should be either {@link View#LAYOUT_DIRECTION_LTR}
		* or {@link View#LAYOUT_DIRECTION_RTL}
		* @return the supported rules
		* @see #addRule(int, int)
		*
		* @hide
		*/
		public int[] getRules(int layoutDirection) {
		if (hasRelativeRules() &&
		(mRulesChanged \|\| layoutDirection != getLayoutDirection())) {
		resolveRules(layoutDirection);
		if (layoutDirection != getLayoutDirection()) {
		setLayoutDirection(layoutDirection);
		}
		}
		return mRules;
		}

		/**
		* Retrieves a complete list of all supported rules, where the index is the rule
		* verb, and the element value is the value specified, or "false" if it was never
		* set.
		* set. There will be no resolution of relative rules done.
		*
		* @return the supported rules
		* @see #addRule(int, int)
		@@ -1233,6 +1376,24 @@ public class RelativeLayout extends ViewGroup {
		public int[] getRules() {
		return mRules;
		}

		@Override
		public void onResolveLayoutDirection(int layoutDirection) {
		final boolean isLayoutRtl = isLayoutRtl();
		if (isLayoutRtl) {
		if (mStart != DEFAULT_RELATIVE) mRight = mStart;
		if (mEnd != DEFAULT_RELATIVE) mLeft = mEnd;
		} else {
		if (mStart != DEFAULT_RELATIVE) mLeft = mStart;
		if (mEnd != DEFAULT_RELATIVE) mRight = mEnd;
		}

		if (hasRelativeRules() && layoutDirection != getLayoutDirection()) {
		resolveRules(layoutDirection);
		}
		// This will set the layout direction
		super.onResolveLayoutDirection(layoutDirection);
		}
		}

		private static class DependencyGraph {

core/res/res/values/attrs.xml

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core/res/res/values/public.xml

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		@@ -3670,5 +3670,11 @@
		<public type="attr" name="paddingEnd"/>
		<public type="attr" name="layout_marginStart"/>
		<public type="attr" name="layout_marginEnd"/>
		<public type="attr" name="layout_toStartOf" />
		<public type="attr" name="layout_toEndOf" />
		<public type="attr" name="layout_alignStart" />
		<public type="attr" name="layout_alignEnd" />
		<public type="attr" name="layout_alignParentStart" />
		<public type="attr" name="layout_alignParentEnd" />

		</resources>