Add a way to insert a parent bread crumb so that deep linked settings can navigate up. (c9ecb73c) · Commits · e / os / android_frameworks_base

api/current.xml

+48 −1

Original line number	Diff line number	Diff line
		@@ -29871,6 +29871,36 @@
		<parameter name="a" type="android.app.Activity">
		</parameter>
		</method>
		<method name="setMaxVisible"
		return="void"
		abstract="false"
		native="false"
		synchronized="false"
		static="false"
		final="false"
		deprecated="not deprecated"
		visibility="public"
		>
		<parameter name="visibleCrumbs" type="int">
		</parameter>
		</method>
		<method name="setParentTitle"
		return="void"
		abstract="false"
		native="false"
		synchronized="false"
		static="false"
		final="false"
		deprecated="not deprecated"
		visibility="public"
		>
		<parameter name="title" type="java.lang.CharSequence">
		</parameter>
		<parameter name="shortTitle" type="java.lang.CharSequence">
		</parameter>
		<parameter name="listener" type="android.view.View.OnClickListener">
		</parameter>
		</method>
		<method name="setTitle"
		return="void"
		abstract="false"
		@@ -148256,6 +148286,23 @@
		<parameter name="view" type="android.view.View">
		</parameter>
		</method>
		<method name="setParentTitle"
		return="void"
		abstract="false"
		native="false"
		synchronized="false"
		static="false"
		final="false"
		deprecated="not deprecated"
		visibility="public"
		>
		<parameter name="title" type="java.lang.CharSequence">
		</parameter>
		<parameter name="shortTitle" type="java.lang.CharSequence">
		</parameter>
		<parameter name="listener" type="android.view.View.OnClickListener">
		</parameter>
		</method>
		<method name="setPreferenceScreen"
		return="void"
		abstract="false"
		@@ -251222,7 +251269,7 @@
		deprecated="not deprecated"
		visibility="public"
		>
		<parameter name="arg0" type="T">
		<parameter name="t" type="T">
		</parameter>
		</method>
		</interface>

core/java/android/app/FragmentBreadCrumbs.java

+83 −24

Original line number	Diff line number	Diff line
		@@ -45,6 +45,10 @@ public class FragmentBreadCrumbs extends ViewGroup

		// Hahah
		BackStackRecord mTopEntry;
		BackStackRecord mParentEntry;

		/** Listener to inform when a parent entry is clicked */
		private OnClickListener mParentClickListener;

		public FragmentBreadCrumbs(Context context) {
		this(context, null);
		@@ -75,27 +79,51 @@ public class FragmentBreadCrumbs extends ViewGroup
		}

		/**
		* The maximum number of crumbs to show.
		* @hide
		* The maximum number of breadcrumbs to show. Older fragment headers will be hidden from view.
		* @param visibleCrumbs the number of visible breadcrumbs. This should be greater than zero.
		*/
		public void setMaxVisible(int visibleCrumbs) {
		if (visibleCrumbs < 1) {
		throw new IllegalArgumentException("visibleCrumbs must be greater than zero");
		}
		mMaxVisible = visibleCrumbs;
		}

		/**
		* Inserts an optional parent entry at the first position in the breadcrumbs. Selecting this
		* entry will result in a call to the specified listener's
		* {@link android.view.View.OnClickListener#onClick(View)}
		* method.
		*
		* @param title the title for the parent entry
		* @param shortTitle the short title for the parent entry
		* @param listener the {@link android.view.View.OnClickListener} to be called when clicked.
		* A null will result in no action being taken when the parent entry is clicked.
		*/
		public void setParentTitle(CharSequence title, CharSequence shortTitle,
		OnClickListener listener) {
		mParentEntry = createBackStackEntry(title, shortTitle);
		mParentClickListener = listener;
		updateCrumbs();
		}

		private BackStackRecord createBackStackEntry(CharSequence title, CharSequence shortTitle) {
		if (title == null) return null;

		final BackStackRecord entry = new BackStackRecord(
		(FragmentManagerImpl) mActivity.getFragmentManager());
		entry.setBreadCrumbTitle(title);
		entry.setBreadCrumbShortTitle(shortTitle);
		return entry;
		}

		/**
		* Set a custom title for the bread crumbs. This will be the first entry
		* shown at the left, representing the root of the bread crumbs. If the
		* title is null, it will not be shown.
		*/
		public void setTitle(CharSequence title, CharSequence shortTitle) {
		if (title == null) {
		mTopEntry = null;
		} else {
		mTopEntry = new BackStackRecord((FragmentManagerImpl)
		mActivity.getFragmentManager());
		mTopEntry.setBreadCrumbTitle(title);
		mTopEntry.setBreadCrumbShortTitle(shortTitle);
		}
		mTopEntry = createBackStackEntry(title, shortTitle);
		updateCrumbs();
		}

		@@ -151,38 +179,63 @@ public class FragmentBreadCrumbs extends ViewGroup
		updateCrumbs();
		}

		/**
		* Returns the number of entries before the backstack, including the title of the current
		* fragment and any custom parent title that was set.
		*/
		private int getPreEntryCount() {
		return (mTopEntry != null ? 1 : 0) + (mParentEntry != null ? 1 : 0);
		}

		/**
		* Returns the pre-entry corresponding to the index. If there is a parent and a top entry
		* set, parent has an index of zero and top entry has an index of 1. Returns null if the
		* specified index doesn't exist or is null.
		* @param index should not be more than {@link #getPreEntryCount()} - 1
		*/
		private BackStackEntry getPreEntry(int index) {
		// If there's a parent entry, then return that for zero'th item, else top entry.
		if (mParentEntry != null) {
		return index == 0 ? mParentEntry : mTopEntry;
		} else {
		return mTopEntry;
		}
		}

		void updateCrumbs() {
		FragmentManager fm = mActivity.getFragmentManager();
		int numEntries = fm.countBackStackEntries();
		int numPreEntries = getPreEntryCount();
		int numViews = mContainer.getChildCount();
		for (int i = mTopEntry != null ? -1 : 0; i < numEntries; i++) {
		BackStackEntry bse = i == -1 ? mTopEntry : fm.getBackStackEntry(i);
		int viewI = mTopEntry != null ? i + 1 : i;
		if (viewI < numViews) {
		View v = mContainer.getChildAt(viewI);
		for (int i = 0; i < numEntries + numPreEntries; i++) {
		BackStackEntry bse = i < numPreEntries
		? getPreEntry(i)
		: fm.getBackStackEntry(i - numPreEntries);
		if (i < numViews) {
		View v = mContainer.getChildAt(i);
		Object tag = v.getTag();
		if (tag != bse) {
		for (int j = viewI; j < numViews; j++) {
		mContainer.removeViewAt(viewI);
		for (int j = i; j < numViews; j++) {
		mContainer.removeViewAt(i);
		}
		numViews = viewI;
		numViews = i;
		}
		}
		if (viewI >= numViews) {
		if (i >= numViews) {
		final View item = mInflater.inflate(
		com.android.internal.R.layout.fragment_bread_crumb_item,
		this, false);
		final TextView text = (TextView) item.findViewById(com.android.internal.R.id.title);
		text.setText(bse.getBreadCrumbTitle());
		text.setTag(bse);
		if (viewI == 0) {
		if (i == 0) {
		item.findViewById(com.android.internal.R.id.left_icon).setVisibility(View.GONE);
		}
		mContainer.addView(item);
		text.setOnClickListener(mOnClickListener);
		}
		}
		int viewI = mTopEntry != null ? numEntries + 1 : numEntries;
		int viewI = numEntries + numPreEntries;
		numViews = mContainer.getChildCount();
		while (numViews > viewI) {
		mContainer.removeViewAt(numViews - 1);
		@@ -208,9 +261,15 @@ public class FragmentBreadCrumbs extends ViewGroup
		public void onClick(View v) {
		if (v.getTag() instanceof BackStackEntry) {
		BackStackEntry bse = (BackStackEntry) v.getTag();
		if (bse == mParentEntry) {
		if (mParentClickListener != null) {
		mParentClickListener.onClick(v);
		}
		} else {
		mActivity.getFragmentManager().popBackStack(bse.getId(),
		bse == mTopEntry? FragmentManager.POP_BACK_STACK_INCLUSIVE : 0);
		}
		}
		}
		};
		}

core/java/android/preference/PreferenceActivity.java

+15 −0

Original line number	Diff line number	Diff line
		@@ -1005,6 +1005,21 @@ public abstract class PreferenceActivity extends ListActivity implements
		mFragmentBreadCrumbs.setActivity(this);
		}
		mFragmentBreadCrumbs.setTitle(title, shortTitle);
		mFragmentBreadCrumbs.setParentTitle(null, null, null);
		}

		/**
		* Should be called after onCreate to ensure that the breadcrumbs, if any, were created.
		* This prepends a title to the fragment breadcrumbs and attaches a listener to any clicks
		* on the parent entry.
		* @param title the title for the breadcrumb
		* @param shortTitle the short title for the breadcrumb
		*/
		public void setParentTitle(CharSequence title, CharSequence shortTitle,
		OnClickListener listener) {
		if (mFragmentBreadCrumbs != null) {
		mFragmentBreadCrumbs.setParentTitle(title, shortTitle, listener);
		}
		}

		void setSelectedHeader(Header header) {