Example usage for android.database Cursor registerDataSetObserver

List of usage examples for android.database Cursor registerDataSetObserver

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Introduction

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

Prototype

void registerDataSetObserver(DataSetObserver observer);

Source Link

Document

Register an observer that is called when changes happen to the contents of the this cursors data set, for example, when the data set is changed via #requery() , #deactivate() , or #close() .

Usage

From source file:com.github.monxalo.android.widget.SectionCursorAdapter.java

@Override
public Cursor swapCursor(Cursor newCursor) {
    if (getCursor() != null) {
        getCursor().unregisterDataSetObserver(mDataSetObserver);
    }/*from  ww  w . j av  a2 s .c om*/

    final Cursor oldCursor = super.swapCursor(newCursor);

    calculateSectionHeaders();

    if (newCursor != null) {
        newCursor.registerDataSetObserver(mDataSetObserver);
    }

    return oldCursor;
}

From source file:com.monxalo.android.widget.SectionCursorAdapter.java

public SectionCursorAdapter(Context context, Cursor c, int headerLayout, int groupColumn) {
    super(context, c, 0);

    sectionsIndexer = new LinkedHashMap<Integer, String>();

    mHeaderRes = headerLayout;/*  ww w  .  j ava 2 s. c  o  m*/
    mGroupColumn = groupColumn;
    mLayoutInflater = LayoutInflater.from(context);

    if (c != null) {
        calculateSectionHeaders();
        c.registerDataSetObserver(mDataSetObserver);
    }
}

From source file:com.github.monxalo.android.widget.SectionCursorAdapter.java

public SectionCursorAdapter(Context context, Cursor c, int headerLayout, int groupColumn) {
    super(context, c, 0);

    mSectionsIndexer = new SparseArray<String>();

    mHeaderRes = headerLayout;//from   w w  w.  j  a v  a 2 s. c  o m
    mGroupColumn = groupColumn;
    mLayoutInflater = LayoutInflater.from(context);

    if (c != null) {
        calculateSectionHeaders();
        c.registerDataSetObserver(mDataSetObserver);
    }
}

From source file:com.github.monxalo.android.widget.SectionCursorAdapter.java

public SectionCursorAdapter(Context context, Cursor c, int headerLayout, String columnName) {
    super(context, c, 0);

    mSectionsIndexer = new SparseArray<String>();

    mHeaderRes = headerLayout;/*from   w w  w  .  j a v a2 s  .  co  m*/
    mGroupColumn = c.getColumnIndex(columnName);
    mLayoutInflater = LayoutInflater.from(context);

    if (c != null) {
        calculateSectionHeaders();
        c.registerDataSetObserver(mDataSetObserver);
    }
}

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  w w . ja va  2 s  .c o 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;
}

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 . ja  va2  s .com*/
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;
}

From source file:org.opendatakit.services.instance.provider.InstanceProvider.java

@Override
public Cursor query(@NonNull Uri uri, String[] projection, String selection, String[] selectionArgs,
        String sortOrder) {//from   w  ww .j a  v a2s . co  m
    possiblyWaitForContentProviderDebugger();

    List<String> segments = uri.getPathSegments();

    if (segments.size() < 2 || segments.size() > 3) {
        throw new SQLException("Unknown URI (too many segments!) " + uri);
    }

    String appName = segments.get(0);
    ODKFileUtils.verifyExternalStorageAvailability();
    ODKFileUtils.assertDirectoryStructure(appName);
    String tableId = segments.get(1);

    DbHandle dbHandleName = OdkConnectionFactorySingleton.getOdkConnectionFactoryInterface()
            .generateInternalUseDbHandle();

    boolean success = false;
    OdkConnectionInterface db = null;
    try {
        // +1 referenceCount if db is returned (non-null)
        db = OdkConnectionFactorySingleton.getOdkConnectionFactoryInterface().getConnection(appName,
                dbHandleName);

        Cursor c = db.query(tableId, projection, selection, selectionArgs, null, null, sortOrder, null);

        if (c == null) {
            return null;
        }

        // Tell the cursor what uri to watch, so it knows when its source data
        // changes
        c.setNotificationUri(getContext().getContentResolver(), uri);
        c.registerDataSetObserver(new InvalidateMonitor(appName, dbHandleName));
        success = true;
        return c;
    } finally {
        if (db != null) {
            try {
                db.releaseReference();
            } finally {
                if (!success) {
                    // this closes the connection
                    // if it was successful, then the InvalidateMonitor will close the connection
                    OdkConnectionFactorySingleton.getOdkConnectionFactoryInterface().removeConnection(appName,
                            dbHandleName);
                }
            }
        }
    }
}

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  w  w.  java 2  s. c  om*/
 *
 * @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;
}

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

void init(Context context, Cursor c, int flags) {
    if ((flags & FLAG_AUTO_REQUERY) == FLAG_AUTO_REQUERY) {
        flags |= FLAG_REGISTER_CONTENT_OBSERVER;
        mAutoRequery = true;//from  ww w  .j a  va 2s  . co m
    } else {
        mAutoRequery = false;
    }
    boolean cursorPresent = c != null;
    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();
        mDataSetObserver = new MyDataSetObserver();
    } else {
        mChangeObserver = null;
        mDataSetObserver = null;
    }

    if (cursorPresent) {
        if (mChangeObserver != null) {
            c.registerContentObserver(mChangeObserver);
        }
        if (mDataSetObserver != null) {
            c.registerDataSetObserver(mDataSetObserver);
        }
    }
}

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

void init(Context context, Cursor c, int flags) {
    if ((flags & FLAG_AUTO_REQUERY) == FLAG_AUTO_REQUERY) {
        flags |= FLAG_REGISTER_CONTENT_OBSERVER;
        mAutoRequery = true;/*  www . j a va 2 s . c om*/
    } else {
        mAutoRequery = false;
    }
    boolean cursorPresent = c != null;
    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();
        mDataSetObserver = new MyDataSetObserver();
    } else {
        mChangeObserver = null;
        mDataSetObserver = null;
    }

    if (cursorPresent) {
        if (mChangeObserver != null)
            c.registerContentObserver(mChangeObserver);
        if (mDataSetObserver != null)
            c.registerDataSetObserver(mDataSetObserver);
    }
}