Add an option to not register the ContentObserver when creating a CursorAdapter. (451513ba) · Commits · e / os / android_frameworks_base

api/current.xml

+53 −0

Original line number	Diff line number	Diff line
		@@ -200039,6 +200039,20 @@
		<parameter name="autoRequery" type="boolean">
		</parameter>
		</constructor>
		<constructor name="CursorAdapter"
		type="android.widget.CursorAdapter"
		static="false"
		final="false"
		deprecated="not deprecated"
		visibility="public"
		>
		<parameter name="context" type="android.content.Context">
		</parameter>
		<parameter name="c" type="android.database.Cursor">
		</parameter>
		<parameter name="flags" type="int">
		</parameter>
		</constructor>
		<method name="bindView"
		return="void"
		abstract="true"
		@@ -200186,6 +200200,23 @@
		<parameter name="autoRequery" type="boolean">
		</parameter>
		</method>
		<method name="init"
		return="void"
		abstract="false"
		native="false"
		synchronized="false"
		static="false"
		final="false"
		deprecated="not deprecated"
		visibility="protected"
		>
		<parameter name="context" type="android.content.Context">
		</parameter>
		<parameter name="c" type="android.database.Cursor">
		</parameter>
		<parameter name="flags" type="int">
		</parameter>
		</method>
		<method name="newDropDownView"
		return="android.view.View"
		abstract="false"
		@@ -200257,6 +200288,28 @@
		<parameter name="filterQueryProvider" type="android.widget.FilterQueryProvider">
		</parameter>
		</method>
		<field name="FLAG_AUTO_REQUERY"
		type="int"
		transient="false"
		volatile="false"
		value="1"
		static="true"
		final="true"
		deprecated="not deprecated"
		visibility="public"
		>
		</field>
		<field name="FLAG_REGISTER_CONTENT_OBSERVER"
		type="int"
		transient="false"
		volatile="false"
		value="2"
		static="true"
		final="true"
		deprecated="not deprecated"
		visibility="public"
		>
		</field>
		</class>
		<class name="CursorTreeAdapter"
		extends="android.widget.BaseExpandableListAdapter"

core/java/android/widget/CursorAdapter.java

+43 −7

Original line number	Diff line number	Diff line
		@@ -79,6 +79,18 @@ public abstract class CursorAdapter extends BaseAdapter implements Filterable,
		*/
		protected FilterQueryProvider mFilterQueryProvider;

		/**
		* If set the adapter will call requery() on the cursor whenever a content change
		* notification is delivered. Implies {@link #FLAG_REGISTER_CONTENT_OBSERVER}
		*/
		public static final int FLAG_AUTO_REQUERY = 0x01;

		/**
		* If set the adapter will register a content observer on the cursor and will call
		* {@link #onContentChanged()} when a notification comes in.
		*/
		public static final int FLAG_REGISTER_CONTENT_OBSERVER = 0x02;

		/**
		* Constructor. The adapter will call requery() on the cursor whenever
		* it changes so that the most recent data is always displayed.
		@@ -87,7 +99,7 @@ public abstract class CursorAdapter extends BaseAdapter implements Filterable,
		* @param context The context
		*/
		public CursorAdapter(Context context, Cursor c) {
		init(context, c, true);
		init(context, c, FLAG_AUTO_REQUERY);
		}

		/**
		@@ -99,19 +111,43 @@ public abstract class CursorAdapter extends BaseAdapter implements Filterable,
		* data is always displayed.
		*/
		public CursorAdapter(Context context, Cursor c, boolean autoRequery) {
		init(context, c, autoRequery);
		init(context, c, autoRequery ? FLAG_AUTO_REQUERY : 0);
		}

		/**
		* Constructor
		* @param c The cursor from which to get the data.
		* @param context The context
		* @param flags flags used to determine the behavior of the adapter
		*/
		public CursorAdapter(Context context, Cursor c, int flags) {
		init(context, c, flags);
		}

		protected void init(Context context, Cursor c, boolean autoRequery) {
		init(context, c, autoRequery ? FLAG_AUTO_REQUERY : 0);
		}

		protected void init(Context context, Cursor c, int flags) {
		if ((flags & FLAG_AUTO_REQUERY) == FLAG_AUTO_REQUERY) {
		flags \|= FLAG_REGISTER_CONTENT_OBSERVER;
		mAutoRequery = true;
		} else {
		mAutoRequery = false;
		}
		boolean cursorPresent = c != null;
		mAutoRequery = autoRequery;
		mCursor = c;
		mDataValid = cursorPresent;
		mContext = context;
		mRowIDColumn = cursorPresent ? c.getColumnIndexOrThrow("_id") : -1;
		if ((flags & FLAG_REGISTER_CONTENT_OBSERVER) == FLAG_REGISTER_CONTENT_OBSERVER) {
		mChangeObserver = new ChangeObserver();
		} else {
		mChangeObserver = null;
		}

		if (cursorPresent) {
		c.registerContentObserver(mChangeObserver);
		if (mChangeObserver != null) c.registerContentObserver(mChangeObserver);
		c.registerDataSetObserver(mDataSetObserver);
		}
		}
		@@ -246,13 +282,13 @@ public abstract class CursorAdapter extends BaseAdapter implements Filterable,
		return;
		}
		if (mCursor != null) {
		mCursor.unregisterContentObserver(mChangeObserver);
		if (mChangeObserver != null) mCursor.unregisterContentObserver(mChangeObserver);
		mCursor.unregisterDataSetObserver(mDataSetObserver);
		mCursor.close();
		}
		mCursor = cursor;
		if (cursor != null) {
		cursor.registerContentObserver(mChangeObserver);
		if (mChangeObserver != null) cursor.registerContentObserver(mChangeObserver);
		cursor.registerDataSetObserver(mDataSetObserver);
		mRowIDColumn = cursor.getColumnIndexOrThrow("_id");
		mDataValid = true;