android.database.DataSetObserver Java Examples

/**
 * Unregister an observer that has previously been registered with this
 * cursor via {@link #registerContentObserver}.
 *
 * @param observer
 *            the object to unregister.
 * @see #registerDataSetObserver(DataSetObserver)
 */
@Override
public void unregisterDataSetObserver(DataSetObserver observer) {
    try {
        if (mCursor != null) {
            mCursor.unregisterDataSetObserver(observer);
        }
    } catch (Exception e) {
        PaLog.d("Cursor exception: " + e);
        if (mCursor != null) {
            try {
                mCursor.close();
            } catch (Exception exception) {
                PaLog.d("Cursor close exception: " + e);
            }
            mCursor = null;
        }
    }
}
 

/**
 * Set the adapter to the listview
 * Automativally hide the progressbar
 * Set the refresh to false
 * If adapter is empty, then the emptyview is shown
 *
 * @param adapter
 */
public void setAdapter(ListAdapter adapter) {
    mProgress.setVisibility(View.GONE);
    if (mEmpty != null && mEmptyId != 0)
        mList.setEmptyView(mEmpty);
    mList.setVisibility(View.VISIBLE);
    mPtrLayout.setRefreshing(false);
    adapter.registerDataSetObserver(new DataSetObserver() {
        @Override
        public void onChanged() {
            super.onChanged();
            mProgress.setVisibility(View.GONE);
            isLoadingMore = false;
            mPtrLayout.setRefreshing(false);
            if (mList.getAdapter().getCount() == 0 && mEmptyId != 0) {
                mEmpty.setVisibility(View.VISIBLE);
            } else if (mEmptyId != 0) {
                mEmpty.setVisibility(View.GONE);
            }
        }
    });
    if ((adapter == null || adapter.getCount() == 0) && mEmptyId != 0) {
        mEmpty.setVisibility(View.VISIBLE);
    }
}
 

protected void notifyDataChangedEvent()
{
    if (a != null)
    {
        for (Iterator iterator = a.iterator(); iterator.hasNext(); ((DataSetObserver)iterator.next()).onChanged()) { }
    }
}
 

/**
 * Notifies observers about data changing
 */
protected void notifyDataChangedEvent() {
    if (datasetObservers != null) {
        for (DataSetObserver observer : datasetObservers) {
            observer.onChanged();
        }
    }
}
 

@Override
public void registerDataSetObserver(DataSetObserver observer) {
    if (datasetObservers == null) {
        datasetObservers = new LinkedList<DataSetObserver>();
    }
    datasetObservers.add(observer);
}
 

@Override
public void registerDataSetObserver(DataSetObserver observer) {
    mDataSetObservable.registerObserver(observer);
    if (mAdapter != null) {
        mAdapter.registerDataSetObserver(observer);
    }
}
 

/**
 * Notifies observers about invalidating data
 */
protected void notifyDataInvalidatedEvent() {
    if (datasetObservers != null) {
        for (DataSetObserver observer : datasetObservers) {
            observer.onInvalidated();
        }
    }
}
 

@Override
public void unregisterDataSetObserver(DataSetObserver observer) {
    if (observer == null) {
        /*
         * http://stackoverflow.com/questions/7290841/java-lang-illegalargumentexception-the-observer-is-null
         * ListView / GridView #onDetachedFromWindow 方法被重复执行时，
         * SDK在 14-17 之间的系统此处 observer 为 null，若不拦截将产生 IllegalArgumentException，
         * SDK 18 修复了此问题
         */
        return;
    }
    super.unregisterDataSetObserver(observer);
}
 

@Override
public void unregisterDataSetObserver(DataSetObserver observer) {
    mDataSetObservable.unregisterObserver(observer);
    if (mAdapter != null) {
        mAdapter.unregisterDataSetObserver(observer);
    }
}
 

@Override
public void unregisterDataSetObserver(DataSetObserver observer) {
    mDataSetObservable.unregisterObserver(observer);
    if (mAdapter != null) {
        mAdapter.unregisterDataSetObserver(observer);
    }
}
 

@Override
public void registerDataSetObserver(DataSetObserver observer) {
    if (datasetObservers == null) {
        datasetObservers = new LinkedList<DataSetObserver>();
    }
    datasetObservers.add(observer);
}
 

@NonNull
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    ((CjdnsApplication) getActivity().getApplication()).inject(this);

    Bundle args = getArguments();
    final int peerId = args.getInt(FRAGMENT_BUNDLE_KEY_PEER_ID);

    final Observable<Node.Peer> peerStream = mPeersProducer.createStream()
            .mergeWith(mPeersProducer.updateStream())
            .filter(new Func1<Node.Peer, Boolean>() {
                @Override
                public Boolean call(Node.Peer peer) {
                    return peer.id == peerId;
                }
            });

    mAdapter = new ConnectionAdapter(getActivity(), mBus,
            AppObservable.bindFragment(this, mSettingsProducer.themeStream()),
            AppObservable.bindFragment(this, peerStream));
    mAdapter.registerDataSetObserver(new DataSetObserver() {
        @Override
        public void onChanged() {
            super.onChanged();
            if (mAdapter.hasData() && mAdapter.getCount() <= 0) {
                dismiss();
            }
        }
    });

    return new MaterialDialog.Builder(getActivity())
            .title(R.string.connections_list_title)
            .adapter(mAdapter, null)
            .listSelector(R.drawable.md_transparent)
            .build();
}
 

private synchronized void internalDataSetChanged() {
    visibleListCache = null;
    unmodifiableVisibleList = null;
    if (observers != null)
    	for (final DataSetObserver observer : observers) {
    		observer.onChanged();
    	}
}
 

public void setAdapter(BaseAdapter adapter) {
    mAdapter = adapter;
    mAdapter.registerDataSetObserver(new DataSetObserver() {
        @Override
        public void onChanged() {
            notifyDataSetChanged();
        }

        @Override
        public void onInvalidated() {
            notifyDataSetInvalidated();
        }
    });
}
 

/**
 * Notifies observers about data changing
 */
protected void notifyDataChangedEvent() {
    if (datasetObservers != null) {
        for (DataSetObserver observer : datasetObservers) {
            observer.onChanged();
        }
    }
}
 

/**
 * Notifies observers about invalidating data
 */
protected void notifyDataInvalidatedEvent() {
    if (datasetObservers != null) {
        for (DataSetObserver observer : datasetObservers) {
            observer.onInvalidated();
        }
    }
}
 

public void unregisterDataSetObserver(DataSetObserver datasetobserver)
{
    if (a != null)
    {
        a.remove(datasetobserver);
    }
}
 

public void setViewPager(ViewPager viewPager) {
    this.viewPager = viewPager;
    viewPager.addOnPageChangeListener(this);
    setPageCount(viewPager.getAdapter().getCount());
    viewPager.getAdapter().registerDataSetObserver(new DataSetObserver() {
        @Override
        public void onChanged() {
            setPageCount(Indicator.this.viewPager.getAdapter().getCount());
        }
    });
    setCurrentPageImmediate();
}
 

public AdapterWrapper(ListAdapter adapter) {
    super();
    mAdapter = adapter;
    
    mAdapter.registerDataSetObserver(new DataSetObserver() {
        public void onChanged() {
            notifyDataSetChanged();
        }

        public void onInvalidated() {
            notifyDataSetInvalidated();
        }
    });
}
 

@Override
public void registerDataSetObserver(DataSetObserver observer) {
    mDataSetObservable.registerObserver(observer);
    if (mAdapter != null) {
        mAdapter.registerDataSetObserver(observer);
    }
}
 

public void testUnregisterDataSetObserver() {
    DataSetObserver mock = mock(DataSetObserver.class);
    mBaseAdapterDecorator.registerDataSetObserver(mock);
    mBaseAdapterDecorator.unregisterDataSetObserver(mock);

    verify(mBaseAdapter).unregisterDataSetObserver(mock);
}
 

@Override
public void setViewPagerObserver(DataSetObserver observer) {
    super.setViewPagerObserver(observer);
    if (observer == null) {
        wrapperViewPager(mViewPager, this);
    }
}
 

@Override
public void registerDataSetObserver(DataSetObserver observer) {
    mAdapter.registerDataSetObserver(observer);
}
 

@Override
public void registerDataSetObserver(DataSetObserver observer) {
    mDataSetObservable.registerObserver(observer);
}
 

@Override
public void unregisterDataSetObserver(DataSetObserver observer) {
    if (observer != null) {
        super.unregisterDataSetObserver(observer);
    }
}
 

public void unregisterDataSetObserver(DataSetObserver observer) {
    mDataSetObservable.unregisterObserver(observer);
}
 

@Override
public void registerDataSetObserver(DataSetObserver observer) {
    super.registerDataSetObserver(observer);
    mDelegate.registerDataSetObserver(observer);
}
 

@Override
public void unregisterDataSetObserver(final DataSetObserver observer){
    mBaseAdapter.unregisterDataSetObserver(observer);
}
 

@Override
public void registerDataSetObserver(DataSetObserver observer) {
    if (mAdapter != null) {
        mAdapter.registerDataSetObserver(observer);
    }
}
 

TweetTimelineRecyclerViewAdapter(Context context,
                                 final TimelineDelegate<Tweet> timelineDelegate,
                                 int styleResId) {
    if (context == null) {
        throw new IllegalArgumentException("Context must not be null");
    }
    this.context = context;
    this.timelineDelegate = timelineDelegate;
    this.styleResId = styleResId;

    this.timelineDelegate.refresh(new Callback<TimelineResult<Tweet>>() {
        @Override
        public void success(Result<TimelineResult<Tweet>> result) {
            notifyDataSetChanged();
            previousCount = TweetTimelineRecyclerViewAdapter.this.timelineDelegate.getCount();
        }

        @Override
        public void failure(TwitterException exception) {

        }
    });

    final DataSetObserver dataSetObserver = new DataSetObserver() {
        @Override
        public void onChanged() {
            super.onChanged();
            if (previousCount == 0) {
                notifyDataSetChanged();
            } else {
                notifyItemRangeInserted(previousCount,
                        TweetTimelineRecyclerViewAdapter.this.timelineDelegate.getCount()
                                - previousCount);
            }
            previousCount = TweetTimelineRecyclerViewAdapter.this.timelineDelegate.getCount();
        }

        @Override
        public void onInvalidated() {
            notifyDataSetChanged();
            super.onInvalidated();
        }
    };

    this.timelineDelegate.registerDataSetObserver(dataSetObserver);
}