Java Code Examples for android.database.Cursor#registerContentObserver()

The following examples show how to use android.database.Cursor#registerContentObserver() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: CursorRecyclerAdapter.java From android-atleap with Apache License 2.0

6 votes

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;
    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);
    }
}

Example 2

Source File: BaseAbstractRecycleCursorAdapter.java From AppCodeArchitecture with Apache License 2.0

6 votes

void init(Context context, Cursor c, int flags) {
    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);
    }
    setHasStableIds(true);
}

Example 3

Source File: CursorAdapter.java From V.FlyoutTest with MIT License

6 votes

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;
    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);
    }
}

Example 4

Source File: CursorAdapter.java From guideshow with MIT License

6 votes

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;
    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);
    }
}

Example 5

Source File: CursorLoader.java From sprinkles with Apache License 2.0

6 votes

@Override
public Cursor loadInBackground() {
	final SQLiteDatabase db = Sprinkles.getDatabase();
	Cursor cursor = db.rawQuery(mSql, null);

	if (cursor != null) {
		// Ensure the cursor window is filled
		cursor.getCount();

		if (mDependencies != null) {
			cursor.registerContentObserver(mObserver);
			for (Class<? extends Model> dependency : mDependencies) {
				getContext().getContentResolver().registerContentObserver(
						Utils.getNotificationUri(dependency), false, mObserver);
			}
		}
	}
	return cursor;
}

Example 6

Source File: BaseAbstractRecycleCursorAdapter.java From AndroidRecyclerViewDemo with Apache License 2.0

6 votes

void init(Context context, Cursor c, int flags) {
    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);
    }

    setHasStableIds(true);//这个地方要注意一下，需要将表关联ID设置为true
}

Example 7

Source File: CursorAdapter.java From V.FlyoutTest with MIT License

6 votes

/**
 * Swap in a new Cursor, returning the old Cursor.  Unlike
 * {@link #changeCursor(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 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");
        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;
}

Example 8

Source File: CircularViewCursorAdapter.java From CircularView with Apache License 2.0

6 votes

void init(final Cursor c, int flags) {
    if ((flags & CursorAdapter.FLAG_AUTO_REQUERY) == CursorAdapter.FLAG_AUTO_REQUERY) {
        flags |= CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER;
        mAutoRequery = true;
    } else {
        mAutoRequery = false;
    }
    boolean cursorPresent = c != null;
    mCursor = c;
    mDataValid = cursorPresent;
    mRowIDColumn = cursorPresent ? c.getColumnIndexOrThrow("_id") : -1;
    if ((flags & CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER) == CursorAdapter.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);
    }
}

Example 9

Source File: RecyclerViewCursorAdapter.java From BLEMeshChat with Mozilla Public License 2.0

6 votes

void init(Context context, Cursor c, int flags) {

        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);
        }
        setHasStableIds(true);
    }

Example 10

Source File: CircularViewCursorAdapter.java From CircularView with Apache License 2.0

6 votes

/**
 * Swap in a new Cursor, returning the old Cursor.  Unlike
 * {@link #changeCursor(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.
 */
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
        notifyDataSetInvalidated();
    }
    return oldCursor;
}

Example 11

Source File: CursorAdapter.java From android-recipes-app with Apache License 2.0

6 votes

/**
 * Swap in a new Cursor, returning the old Cursor.  Unlike
 * {@link #changeCursor(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 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");
        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;
}

Example 12

Source File: CursorTreeAdapter.java From android_9.0.0_r45 with Apache License 2.0

6 votes

void changeCursor(Cursor cursor, boolean releaseCursors) {
    if (cursor == mCursor) return;

    deactivate();
    mCursor = cursor;
    if (cursor != null) {
        cursor.registerContentObserver(mContentObserver);
        cursor.registerDataSetObserver(mDataSetObserver);
        mRowIDColumn = cursor.getColumnIndex("_id");
        mDataValid = true;
        // notify the observers about the new cursor
        notifyDataSetChanged(releaseCursors);
    } else {
        mRowIDColumn = -1;
        mDataValid = false;
        // notify the observers about the lack of a data set
        notifyDataSetInvalidated();
    }
}

Example 13

Source File: CursorAdapter.java From CodenameOne with GNU General Public License v2.0

6 votes

/**
 * Swap in a new Cursor, returning the old Cursor.  Unlike
 * {@link #changeCursor(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 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");
        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;
}

Example 14

Source File: CursorLoader.java From letv with Apache License 2.0

5 votes

public Cursor loadInBackground() {
    Cursor cursor = null;
    try {
        cursor = getContext().getContentResolver().query(this.mUri, this.mProjection, this.mSelection, this.mSelectionArgs, this.mSortOrder);
        if (cursor != null) {
            cursor.getCount();
            cursor.registerContentObserver(this.mObserver);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return cursor;
}

Example 15

Source File: CursorAdapter.java From ExRecyclerViewLibrary with Apache License 2.0

5 votes

/**
     * Swap in a new Cursor, returning the old Cursor.  Unlike
     * {@link #changeCursor(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 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");
            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();
//            notifyDataSetInvalidated();
        }
        return oldCursor;
    }

Example 16

Source File: CursorRecyclerAdapter.java From Ouroboros with GNU General Public License v3.0

5 votes

/**
 * Swap in a new Cursor, returning the old Cursor.  Unlike
 * {@link #changeCursor(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 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");
        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();
        notifyItemRangeRemoved(0, getItemCount());
    }
    return oldCursor;
}

Example 17

Source File: BaseAbstractRecycleCursorAdapter.java From AndroidRecyclerViewDemo with Apache License 2.0

5 votes

/**
 * Swap in a new Cursor, returning the old Cursor.  Unlike
 * {@link #changeCursor(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 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");
        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
        //There is no notifyDataSetInvalidated() method in RecyclerView.Adapter
        notifyDataSetChanged();
    }
    return oldCursor;
}

Example 18

Source File: CursorTreeAdapter.java From android_9.0.0_r45 with Apache License 2.0

5 votes

MyCursorHelper(Cursor cursor) {
    final boolean cursorPresent = cursor != null;
    mCursor = cursor;
    mDataValid = cursorPresent;
    mRowIDColumn = cursorPresent ? cursor.getColumnIndex("_id") : -1;
    mContentObserver = new MyContentObserver();
    mDataSetObserver = new MyDataSetObserver();
    if (cursorPresent) {
        cursor.registerContentObserver(mContentObserver);
        cursor.registerDataSetObserver(mDataSetObserver);
    }
}

Example 19

Source File: QueryResult.java From arca-android with BSD 3-Clause "New" or "Revised" License

4 votes

public void registerContentObserver(final ContentObserver observer) {
	final Cursor cursor = getData();
	if (cursor != null) {
		cursor.registerContentObserver(observer);
	}
}

Example 20

Source File: AddIdCursorLoader.java From mobile-manager-tool with MIT License

2 votes

/**
 * Registers an observer to get notifications from the content provider
 * when the cursor needs to be refreshed.
 */
void registerContentObserver(Cursor cursor, ContentObserver observer) {
    cursor.registerContentObserver(mObserver);
}