Example usage for android.database Cursor unregisterDataSetObserver

Introduction

In this page you can find the example usage for android.database Cursor unregisterDataSetObserver.

Prototype

void unregisterDataSetObserver(DataSetObserver observer);

Source Link

Document

Unregister an observer that has previously been registered with this cursor via #registerContentObserver .

Usage

From source file:com.lightydev.dk.widget.PagerCursorAdapter.java

public Cursor swapCursor(Cursor newCursor) {
    if (mCursor == newCursor) {
        return null;
    }//  ww w  .j  a  v a  2  s  .co  m
    final Cursor oldCursor = mCursor;
    if (oldCursor != null) {
        oldCursor.unregisterDataSetObserver(mDataSetObserver);
    }
    mCursor = newCursor;
    if (mCursor != null) {
        mCursor.registerDataSetObserver(mDataSetObserver);
    }
    notifyDataSetChanged();
    return oldCursor;
}

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From source file:cz.maresmar.sfm.view.menu.CursorPagerAdapter.java

/**
 * Replaces old {@link Cursor} with new one.
 *
 * @param newCursor New cursor to replace
 * @return Old cursor// w w  w  .j  av  a2 s .  c  om
 */
public Cursor swapCursor(@Nullable Cursor newCursor) {
    // Ignore same cursor
    if (newCursor == mCursor) {
        return null;
    }

    // Release old cursor
    final Cursor oldCursor = mCursor;
    if (oldCursor != null && mDataSetObserver != null) {
        oldCursor.unregisterDataSetObserver(mDataSetObserver);
    }

    // Prepare new cursor
    mCursor = newCursor;
    if (mCursor != null) {
        mCursor.registerDataSetObserver(mDataSetObserver);
        mIdColumnIndex = mCursor.getColumnIndexOrThrow(BaseColumns._ID);
    } else {
        mIdColumnIndex = -1;
    }

    // Update results in UI
    notifyDataSetChanged();
    return oldCursor;
}

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From source file:com.cattle.util.CursorPagerAdapter.java

/**
 * Swap in a new Cursor, returning the old Cursor. Unlike {@link #changeCursor(android.database.Cursor)}, the
 * returned old Cursor is <em>not</em> closed.
 *
 * @param newCursor The new cursor to be used.
 * @return Returns the previously set Cursor, or null if there was not one. If the given new Cursor
 *         is the same instance is the previously set Cursor, null is also returned.
 *//*from   w w w. j  a v a  2  s .co  m*/
public Cursor swapCursor(Cursor newCursor) {
    if (newCursor == mCursor) {
        return null;
    }
    Cursor oldCursor = mCursor;
    if (oldCursor != null) {
        if (mChangeObserver != null) {
            oldCursor.unregisterContentObserver(mChangeObserver);
        }
        if (mDataSetObserver != null) {
            oldCursor.unregisterDataSetObserver(mDataSetObserver);
        }
    }
    mCursor = newCursor;
    if (newCursor != null) {
        if (mChangeObserver != null) {
            newCursor.registerContentObserver(mChangeObserver);
        }
        if (mDataSetObserver != null) {
            newCursor.registerDataSetObserver(mDataSetObserver);
        }
        mRowIDColumn = newCursor.getColumnIndexOrThrow("_id");
        mDataValid = true;
        // notify the observers about the new cursor
        notifyDataSetChanged();
    } else {
        mRowIDColumn = -1;
        mDataValid = false;
        // notify the observers about the lack of a data set
        notifyDataSetChanged();
    }
    return oldCursor;
}

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From source file:uk.co.senab.photup.util.CursorPagerAdapter.java

/**
 * Swap in a new Cursor, returning the old Cursor. Unlike
 * {@link #changeCursor(Cursor)}, the returned old Cursor is <em>not</em>
 * closed.//from w  ww . ja v  a  2  s. co m
 * 
 * @param newCursor
 *            The new cursor to be used.
 * @return Returns the previously set Cursor, or null if there was not one.
 *         If the given new Cursor is the same instance is the previously
 *         set Cursor, null is also returned.
 */
public Cursor swapCursor(Cursor newCursor) {
    if (newCursor == mCursor) {
        return null;
    }
    Cursor oldCursor = mCursor;
    if (oldCursor != null) {
        if (mChangeObserver != null)
            oldCursor.unregisterContentObserver(mChangeObserver);
        if (mDataSetObserver != null)
            oldCursor.unregisterDataSetObserver(mDataSetObserver);
    }
    mCursor = newCursor;
    if (newCursor != null) {
        if (mChangeObserver != null)
            newCursor.registerContentObserver(mChangeObserver);
        if (mDataSetObserver != null)
            newCursor.registerDataSetObserver(mDataSetObserver);
        mRowIDColumn = newCursor.getColumnIndexOrThrow("_id");
        mDataValid = true;
        // notify the observers about the new cursor
        notifyDataSetChanged();
    } else {
        mRowIDColumn = -1;
        mDataValid = false;
        // notify the observers about the lack of a data set
        notifyDataSetChanged();
    }
    return oldCursor;
}

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From source file:com.niveales.library.utils.MyCursorAdapter.java

/**
 * Swap in a new Cursor, returning the old Cursor.  Unlike
 * {@link #changeCursor(Cursor)}, the returned old Cursor is <em>not</em>
 * closed./*from w ww . ja v a  2s  .  c o  m*/
 *
 * @param newCursor The new cursor to be used.
 * @return Returns the previously set Cursor, or null if there wasa not one.
 * If the given new Cursor is the same instance is the previously set
 * Cursor, null is also returned.
 */
public Cursor swapCursor(Cursor newCursor) {
    if (newCursor == mCursor) {
        return null;
    }
    Cursor oldCursor = mCursor;
    if (oldCursor != null) {
        if (mChangeObserver != null)
            oldCursor.unregisterContentObserver(mChangeObserver);
        if (mDataSetObserver != null)
            oldCursor.unregisterDataSetObserver(mDataSetObserver);
    }
    mCursor = newCursor;
    if (newCursor != null) {
        if (mChangeObserver != null)
            newCursor.registerContentObserver(mChangeObserver);
        if (mDataSetObserver != null)
            newCursor.registerDataSetObserver(mDataSetObserver);
        mRowIDColumn = newCursor.getColumnIndexOrThrow(id_field);
        mDataValid = true;
        // notify the observers about the new cursor
        notifyDataSetChanged();
    } else {
        mRowIDColumn = -1;
        mDataValid = false;
        // notify the observers about the lack of a data set
        notifyDataSetInvalidated();
    }
    return oldCursor;
}

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