Example usage for android.database Cursor registerContentObserver

Introduction

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

Prototype

void registerContentObserver(ContentObserver observer);

Source Link

Document

Register an observer that is called when changes happen to the content backing this cursor.

Usage

From source file:com.getbase.android.db.loaders.ComposedCursorLoader.java

private Cursor loadCursorInBackground() {
    Cursor cursor = getContext().getContentResolver().query(mUri, mProjection, mSelection, mSelectionArgs,
            mSortOrder);//from   ww w . j  a  va 2 s . c o  m
    if (cursor != null) {
        // Ensure the cursor window is filled
        cursor.getCount();
        cursor.registerContentObserver(mObserver);
    }
    return cursor;
}

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From source file:org.hisp.dhis.mobile.datacapture.io.AbsCursorLoader.java

@Override
public CursorHolder<T> loadInBackground() {
    Cursor cursor = getContext().getContentResolver().query(mUri, mProjection, mSelection, mSelectionArgs,
            mSortOrder);/* ww w.ja  va  2  s  .co  m*/
    if (cursor != null) {
        // Ensure the cursor window is filled
        cursor.getCount();
        cursor.registerContentObserver(mObserver);
    }
    // read data from cursor here
    return new CursorHolder<T>(cursor, readDataFromCursor(cursor));
}

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From source file:com.example.iotalk.ObjectCursorLoader.java

@Override
public ObjectCursor<T> loadInBackground() {
    final Cursor inner = getContext().getContentResolver().query(mUri, mProjection, mSelection, mSelectionArgs,
            mSortOrder);//from w  w  w . ja  va2  s  .c  om
    if (inner != null) {
        // Ensure the cursor window is filled
        inner.getCount();
        inner.registerContentObserver(mObserver);
    }
    // Modifications to the ObjectCursor, create an Object Cursor and fill the cache.
    final ObjectCursor<T> cursor = getObjectCursor(inner);
    cursor.fillCache();

    try {
        if (mDebugDelayMs > 0) {
            Thread.sleep(mDebugDelayMs);
        }
    } catch (InterruptedException e) {
    }

    return cursor;
}

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From source file:org.mariotaku.twidere.loader.support.ObjectCursorLoader.java

@Override
public ObjectCursor<T> loadInBackground() {
    Cursor cursor = getContext().getContentResolver().query(mUri, mProjection, mSelection, mSelectionArgs,
            mSortOrder);//w  ww  .  j a va 2 s.  co  m
    if (cursor != null) {
        // Ensure the cursor window is filled
        cursor.getCount();
        cursor.registerContentObserver(mObserver);
    }
    if (cursor == null)
        throw new NullPointerException("Cursor is null");
    return new ObjectCursor<>(cursor, createIndices(cursor));
}

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From source file:org.mariotaku.twidere.loader.ObjectCursorLoader.java

@Override
public ObjectCursor<T> loadInBackground() {
    Cursor cursor = getContext().getContentResolver().query(mUri, mProjection, mSelection, mSelectionArgs,
            mSortOrder);// w  ww  .  j a v a  2s.  c o m
    if (cursor != null) {
        // Ensure the cursor window is filled
        cursor.getCount();
        cursor.registerContentObserver(mObserver);
    }
    if (cursor == null)
        throw new NullPointerException("Cursor is null");
    return createObjectCursor(cursor, createIndices(cursor));
}

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From source file:com.vokal.db.util.ObjectCursorLoader.java

@Override
public ObjectCursor<T> loadInBackground() {
    final Cursor inner = getContext().getContentResolver().query(mUri, mProjection, mSelection, mSelectionArgs,
            mSortOrder);/* w w w  . jav  a 2s .  co  m*/
    if (inner == null) {
        return null;
    }

    // Ensure the cursor window is filled
    inner.getCount();
    inner.registerContentObserver(mObserver);

    // Modifications to the ObjectCursor, create an Object Cursor and fill the cache.
    final ObjectCursor<T> cursor = getObjectCursor(inner);
    cursor.fillCache();

    try {
        if (mDebugDelayMs > 0) {
            Thread.sleep(mDebugDelayMs);
        }
    } catch (InterruptedException e) {
    }

    return cursor;
}

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From source file:es.jpv.android.examples.loadersexample.db.DBSelectCursorLoader.java

/**
 * Runs a query asynchronously//from   ww  w .  j av a  2s.  c o  m
 *
 * @return A Cursor object with the data
 */
@Override
public Cursor loadInBackground() {
    Cursor cursor = mDB.getReadableDatabase().query(mTable, mProjection, mSelection, mSelectionArgs, null, null,
            mSortOrder, String.valueOf(mLimit));
    if (cursor != null) {
        // Ensure the cursor window is filled
        cursor.getCount();
        cursor.registerContentObserver(mObserver);
    }
    return cursor;
}

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From source file:com.bitants.wally.fragments.SavedImagesFragment.java

private void initObserver(Cursor cursor) {
    if (cursor != null) {
        if (contentObserver == null) {
            contentObserver = new ContentObserver(uiHandler) {
                @Override/*  w  w w  .j  a  v a  2s .  c o  m*/
                public void onChange(boolean selfChange) {
                    super.onChange(selfChange);
                    getImages(0, null);
                }
            };

        }
        try {
            cursor.registerContentObserver(contentObserver);
        } catch (IllegalStateException e) {
            //Oh goodie, it's already registered. Nevermind then.
        }
    }
}

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From source file:cn.tangxb.imageselector.PhotoModelTaskLoader.java

@Override
public ArrayList<PhotoModel> loadInBackground() {
    synchronized (this) {
        if (isLoadInBackgroundCanceled()) {
            throw new OperationCanceledException();
        }/*from  ww w  .ja va2s  .c om*/
        mCancellationSignal = new CancellationSignal();
    }
    try {
        Cursor cursor = ContentResolverCompat.query(getContext().getContentResolver(),
                MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                new String[] { MediaStore.Images.ImageColumns.DATA, MediaStore.Images.ImageColumns.DATE_ADDED,
                        MediaStore.Images.ImageColumns.SIZE },
                null, null, MediaStore.Images.ImageColumns.DATE_ADDED, mCancellationSignal);
        if (cursor != null) {
            try {
                // Ensure the cursor window is filled.
                cursor.getCount();
                cursor.registerContentObserver(mObserver);
                mData = new ArrayList<>();

                if (cursor == null || !cursor.moveToNext())
                    return mData;
                cursor.moveToLast();
                do {
                    if (cursor.getLong(cursor.getColumnIndex(MediaStore.Images.ImageColumns.SIZE)) > 1024
                            * 10) {
                        PhotoModel photoModel = new PhotoModel();
                        photoModel.setOriginalPath(
                                cursor.getString(cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA)));
                        mData.add(photoModel);
                    }
                } while (cursor.moveToPrevious());
            } catch (RuntimeException ex) {
                cursor.close();
                throw ex;
            }
        }
        return mData;
    } finally {
        synchronized (this) {
            mCancellationSignal = null;
        }
    }
}

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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.// w  w w  .  j a 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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