good morning i tried to parse rss and show the result in custom listview but i had a problem with my custom adapter that i created to show a thumbail image with a textview i get usually null pointer excpetion in every execution in genymotion simulator.
this the code of the three files of code :
main activity
public class MainActivity extends Activity {
ArrayList<HashMap<String, String>> name;
ListView maListRSS;
Bitmap img;
ArrayList<News> News_data ;
private ProgressDialog mProgressDialog;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
maListRSS = (ListView) findViewById(R.id.list);
name = new ArrayList<HashMap<String, String>>();
News_data = new ArrayList<News>();
AsyncTask<Void, Void, Void> task = new AsyncTask<Void, Void, Void>() {
protected void onPreExecute() {
mProgressDialog = new ProgressDialog(MainActivity.this);
mProgressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
mProgressDialog.setMessage("جاري التحميل....");
mProgressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
mProgressDialog.show();
}
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
URL url = null;
try {
url = new URL("http://ahsaber.org/?feed=rss2");
} catch (MalformedURLException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = null;
try {
db = dbf.newDocumentBuilder();
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
org.w3c.dom.Document doc = null;
try {
doc = db.parse(new InputSource(url.openStream()));
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
doc.getDocumentElement().normalize();
NodeList nodeList = doc.getElementsByTagName("item");
for (int i = 0; i < nodeList.getLength(); i++) {
Node node = nodeList.item(i);
Element fstElmnt = (Element) node;
NodeList nameList = fstElmnt.getElementsByTagName("title");
Element nameElement = (Element) nameList.item(0);
nameList = ((Node) nameElement).getChildNodes();
NodeList websiteList =fstElmnt.getElementsByTagName("link");
Element websiteElement = (Element) websiteList.item(0);
websiteList = ((Node) websiteElement).getChildNodes();
NodeList descriptionList =fstElmnt.getElementsByTagName("description");
Element descriptionElement = (Element) descriptionList.item(0);
descriptionList = ((Node) descriptionElement).getChildNodes();
NodeList encodedList =fstElmnt.getElementsByTagName("content:encoded");
Element EnocodeElement = (Element) encodedList.item(0);
encodedList = ((Node) EnocodeElement).getChildNodes();
int start =EnocodeElement.getTextContent().indexOf("http://ahsaber.org");
int end =EnocodeElement.getTextContent().indexOf(".jpg");
HashMap<String, String> map = new HashMap<String, String>();
map.put("title", ((Node) nameList.item(0)).getNodeValue());
map.put("tel", ((Node) websiteList.item(0)).getNodeValue());
map.put("des", ((Node) descriptionList.item(0)).getNodeValue());
if (end>start)
{
map.put("imageURL",EnocodeElement.getTextContent().substring(start,end)+".jpg");
System.out.println(EnocodeElement.getTextContent().substring(start,end));
try {
URL lien = new URL(EnocodeElement.getTextContent().substring(start,end)+".jpg");
HttpURLConnection connection = null;
connection = (HttpURLConnection) lien.openConnection();
InputStream is = null;
is = connection.getInputStream();
img = BitmapFactory.decodeStream(is);
News N=new News(img,((Node) nameList.item(0)).getNodeValue());
News_data.add(N);
name.add(map);
}
catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
return null;
}
protected void onPostExecute(Void result) {
mProgressDialog.dismiss();
NewsAdapter adapter = new NewsAdapter(MainActivity.this,
R.layout.listviewrow, News_data);
adapter.notifyDataSetChanged();
maListRSS.setAdapter(adapter);
}
};
task.execute((Void[]) null);
}
}
this the custom adapter class :
public class NewsAdapter extends ArrayAdapter<News> {
Context context;
int layoutResourceId;
ArrayList<News> data =new ArrayList<News>() ;
public NewsAdapter(Context asyncTask, int layoutResourceId, ArrayList<News> news_data) {
super(asyncTask, layoutResourceId, news_data);
this.layoutResourceId = layoutResourceId;
this.context = asyncTask;
for (int i=0;i<news_data.size();i++)
{
data.add(news_data.get(i));
}
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
NewsHolder holder = null;
if(row == null)
{
LayoutInflater inflater = ((Activity)context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new NewsHolder();
holder.imgIcon = (ImageView)row.findViewById(R.id.newsimage);
holder.txtTitle = (TextView)row.findViewById(R.id.newstitle);
row.setTag(holder);
}
else
{
holder = (NewsHolder)row.getTag();
}
News N= data.get(position);
holder.txtTitle.setText(N.title);
holder.imgIcon.setImageBitmap(N.icon);
return row;
}
public int getCount() {
// TODO Auto-generated method stub
return data.size();
}
static class NewsHolder
{
ImageView imgIcon;
TextView txtTitle;
}
}
the news class :
public class News {
public Bitmap icon;
public String title;
public News() {
// TODO Auto-generated constructor stub
super();
}
public News(Bitmap icon, String title) {
super();
this.icon = icon;
this.title = title;
}
}
so this is the logcat :
01-08 10:02:11.584: E/AndroidRuntime(967): FATAL EXCEPTION: main
01-08 10:02:11.584: E/AndroidRuntime(967): java.lang.NullPointerException
01-08 10:02:11.584: E/AndroidRuntime(967): at com.example.albir.MainActivity$1.onPostExecute(MainActivity.java:139)
01-08 10:02:11.584: E/AndroidRuntime(967): at com.example.albir.MainActivity$1.onPostExecute(MainActivity.java:1)
01-08 10:02:11.584: E/AndroidRuntime(967): at android.os.AsyncTask.finish(AsyncTask.java:631)
01-08 10:02:11.584: E/AndroidRuntime(967): at android.os.AsyncTask.access$600(AsyncTask.java:177)
01-08 10:02:11.584: E/AndroidRuntime(967): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644)
01-08 10:02:11.584: E/AndroidRuntime(967): at android.os.Handler.dispatchMessage(Handler.java:99)
01-08 10:02:11.584: E/AndroidRuntime(967): at android.os.Looper.loop(Looper.java:137)
01-08 10:02:11.584: E/AndroidRuntime(967): at android.app.ActivityThread.main(ActivityThread.java:4745)
01-08 10:02:11.584: E/AndroidRuntime(967): at java.lang.reflect.Method.invokeNative(Native Method)
01-08 10:02:11.584: E/AndroidRuntime(967): at java.lang.reflect.Method.invoke(Method.java:511)
01-08 10:02:11.584: E/AndroidRuntime(967): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
01-08 10:02:11.584: E/AndroidRuntime(967): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
01-08 10:02:11.584: E/AndroidRuntime(967): at dalvik.system.NativeStart.main(Native Method)
Related
I want to write the exceptions in the same file as the item writer but do not work
// MyLitner
public static class MySkipListener implements SkipListener<CSCiviqueDTO, CSCiviqueDTO> {
private BufferedWriter bw = null;
public MySkipListener(File file) throws IOException {
bw= new BufferedWriter(new FileWriter(file, true));
}
#Override
public void onSkipInRead(Throwable throwable) {
if (throwable instanceof FlatFileParseException) {
FlatFileParseException flatFileParseException = (FlatFileParseException) throwable;
System.out.println("onSkipInRead =========> :");
try {
bw.write(flatFileParseException.getInput() + "; Step Vérifiez les colonnes !!");
bw.newLine();
bw.flush();
// fileWriter.close();
} catch (IOException e) {
System.err.println("Unable to write skipped line to error file");
}
}
}
I am creating javafx application where I have this case that I need to listen for data sent over Bluetooth.
I have one fxml window on which I need to initialize Bluetooth and start listening from data.
Following is my Code for fxml controller:
//all imports
public class NewBarcodeInvoicePaneController implements Initializable{
private BluetoothController bc;
public BluetoothController getBc() {
return bc;
}
#Override
public void initialize(URL location, ResourceBundle resources) {
try {
bc = new BluetoothController();
new Thread(bc).start();
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
And BluetoothController is task where I initialize bluettoth and listen to the data
public class BluetoothController extends Task<Void> {
#Override
protected Void call() throws Exception {
LocalDevice local = null;
StreamConnectionNotifier notifier;
StreamConnection connection = null;
// setup the server to listen for connection
try {
local = LocalDevice.getLocalDevice();
try {
local.setDiscoverable(DiscoveryAgent.GIAC);
} catch (BluetoothStateException e) {
}
UUID uuid = new UUID(80087355); // "04c6093b-0000-1000-8000-00805f9b34fb"
String url = "btspp://localhost:" + uuid.toString() + ";name=RemoteBluetooth";
notifier = (StreamConnectionNotifier) Connector.open(url);
} catch (Exception e) {
e.printStackTrace();
return null;
}
try {
System.err.println("THIS IS HAPENING");
connection = notifier.acceptAndOpen();
System.err.println("HAPENING???????????????????????????");
InputStream inputStream = connection.openInputStream();
BufferedReader bReader = new BufferedReader(new InputStreamReader(inputStream));
String lineRead = bReader.readLine();
connection.close();
inputStream.close();
notifier.close();
local.setDiscoverable(DiscoveryAgent.NOT_DISCOVERABLE);
JSONParser parser = new JSONParser();
Object obj = parser.parse(lineRead);
JSONArray array = (JSONArray) obj;
array.stream().map((o) -> (String) o).forEach((stringObj) -> {
System.out.println(stringObj);
});
System.out.println("AFTER DATA RECIEVED");
} catch (Exception e) {
e.printStackTrace();
return null;
}
return null;
}
}
It Works fine if I send data over bluetooth and blocking call to notifier.acceptAndOpen() is unblocked.
My problem is when we do not pass any data and I just want to close the window I opened..
It still have blocking call open with extra thread by the task.
I tried to cancel BluetoothController task in Main controller where I open this window like following
private void openNewBarcodeInvoicePane(ActionEvent ae) {
//following are custom classes to open windows from fxml and getting controller back for further manipulation
PostoryModalWindow modalWindow = new PostoryModalWindow();
modalWindow.openNewModalPaneWithParent("New Invoice", "fxml/newbarcodeinvoicepane.fxml", ae);
//getting controller object
NewBarcodeInvoicePaneController controller = (NewBarcodeInvoicePaneController) modalWindow.getDswFromController();
controller.getWindowStage().showAndWait();
BluetoothController bc = controller.getBc();
if(bc != null){
System.err.println("CANCELLING");
bc.cancel(true);
}
}
But it doesn't throw InterrupttedExeption (In which I might have Choice to close Bluetooth thread) and after research I found that waiting on Socket doesn't work on interrupt.
Any help on this?
Thanks
Got Solution After Some Research.
I just added new task to call notifier.acceptAndOpen();
And added method to close Bluetooth notifier.
public class BluetoothController extends Task<Void> {
private final ObservableList<Item> items = FXCollections.observableArrayList();
public ObservableList<Item> getItems() {
return items;
}
StreamConnectionNotifier notifier;
#Override
protected Void call() throws Exception {
try {
BluetoothConnectionTask bct = new BluetoothConnectionTask(items);
new Thread(bct).start();
Thread.sleep(2000);
notifier = bct.getNotifier();
} catch (Exception e) {
e.printStackTrace();
return null;
}
return null;
}
public void cancelandExit() {
try {
if (notifier != null) {
notifier.close();
}
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
Here is new task for blocking call
public class BluetoothConnectionTask extends Task<Void>{
private StreamConnectionNotifier notifier;
private StreamConnection connection;
private ObservableList<Item> items = FXCollections.observableArrayList();
public StreamConnection getConnection() {
return connection;
}
public StreamConnectionNotifier getNotifier() {
return notifier;
}
public BluetoothConnectionTask(ObservableList<Item> is){
items = is;
}
#Override
protected Void call() throws Exception {
try {
LocalDevice local = LocalDevice.getLocalDevice();
try {
local.setDiscoverable(DiscoveryAgent.GIAC);
} catch (BluetoothStateException e) {
}
UUID uuid = new UUID(80087355); // "04c6093b-0000-1000-8000-00805f9b34fb"
String url = "btspp://localhost:" + uuid.toString() + ";name=RemoteBluetooth";
notifier = (StreamConnectionNotifier) Connector.open(url);
} catch (Exception e) {
e.printStackTrace();
return null;
}
connection = notifier.acceptAndOpen();
InputStream inputStream = connection.openInputStream();
BufferedReader bReader = new BufferedReader(new InputStreamReader(inputStream));
String lineRead = bReader.readLine();
connection.close();
inputStream.close();
notifier.close();
LocalDevice local = LocalDevice.getLocalDevice();
local.setDiscoverable(DiscoveryAgent.NOT_DISCOVERABLE);
JSONParser parser = new JSONParser();
Object obj = parser.parse(lineRead);
JSONArray array = (JSONArray) obj;
ItemDAO idao = new ItemDAO();
array.stream().map((o) -> (String) o).forEach((stringObj) -> {
String barcode = (String) stringObj;
Item i = idao.getItemByBarCode(barcode);
System.err.println("Adding Item "+i.getName());
items.add(i);
});
System.out.println("AFTER DATA RECIEVED");
return null;
}
}
Now for cancelling closing my bluetooth thread I am calling cancelandExit() after window is closed.
I face the error :
1566-1566/com.example.rom.romproject E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.example.rom.romproject, PID: 1566
java.lang.IllegalStateException: Could not execute method of the activity
at android.view.View$1.onClick(View.java:3823)
at android.view.View.performClick(View.java:4438)
at android.view.View$PerformClick.run(View.java:18422)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at android.view.View$1.onClick(View.java:3818)
at android.view.View.performClick(View.java:4438)
at android.view.View$PerformClick.run(View.java:18422)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.example.rom.romproject.ContactView.contactFavorite(ContactView.java:37)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at android.view.View$1.onClick(View.java:3818)
at android.view.View.performClick(View.java:4438)
at android.view.View$PerformClick.run(View.java:18422)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)
This happens when im clicking on a button i created.
The button purpose is to insert Data into my sql table.
The SQL class :
public class sqlDatabaseAdapter
{
sqlHelper helper;
public sqlDatabaseAdapter(Context context)
{
helper = new sqlHelper(context);
}
public long insertData(String name, String phone)
{
SQLiteDatabase db = helper.getWritableDatabase();
ContentValues content = new ContentValues();
content.put(sqlHelper.NAME, name);
content.put(sqlHelper.PHONE, phone);
return db.insert(helper.TABLE_NAME, null, content);
}
static class sqlHelper extends SQLiteOpenHelper
{
static final String DATABASE_NAME = "ContactDB";
static final String TABLE_NAME = "Favorites";
static final int DB_VERSION = 1;
static final String UID = "_id";
static final String NAME = "Name";
static final String PHONE = "Phone";
static final String CREATE_TABLE = "CREATE TABLE "+ TABLE_NAME +" ("+UID+" INTEGER PRIMARY KEY AUTOINCREMENT, "+NAME+" VARCHAR(255), "+PHONE+" VARCHAR(255));";
static final String DROP_TABLE = "DROP TABLE IF EXISTS"+TABLE_NAME;
private Context context;
public sqlHelper(Context context)
{
super(context, DATABASE_NAME, null, DB_VERSION);
this.context = context;
Message.Message(context, "Constructor Called");
}
#Override
public void onCreate(SQLiteDatabase db)
{
try {
db.execSQL(CREATE_TABLE);
Message.Message(context, "onCreate Called");
} catch( SQLException e)
{
Message.Message(context, "" + e);
}
}
#Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
{
try {
db.execSQL(DROP_TABLE);
onCreate(db);
Message.Message(context, "OnUpgrade Called");
} catch(SQLException e)
{
Message.Message(context, "" + e);
}
}
}
}
Now, im not rly sure at the source of the problem , so i will post both of my activites.
Btw : the info im trying to insert to the SQL is a contact name and phone
(that i get from the main activity list view).
Main Activity ( List view of phone contacts ) :
public class MainActivity extends ListActivity {
ListView l;
Cursor cursor;
SimpleCursorAdapter listAdapter;
sqlDatabaseAdapter helper;
#Override
public int getSelectedItemPosition()
{
return super.getSelectedItemPosition();
}
#Override
public long getSelectedItemId()
{
return super.getSelectedItemId();
}
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
cursor = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null);
startManagingCursor(cursor);
String[] from = {ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME,ContactsContract.CommonDataKinds.Phone.NUMBER, ContactsContract.CommonDataKinds.Phone._ID};
int[] to = {android.R.id.text1,android.R.id.text2};
listAdapter = new SimpleCursorAdapter(this,android.R.layout.simple_list_item_2,cursor,from,to);
setListAdapter(listAdapter);
l = getListView();
l.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
helper = new sqlDatabaseAdapter(this);
helper.helper.getWritableDatabase();
}
#Override
protected void onListItemClick(ListView l, View v, int position, long id)
{
super.onListItemClick(l, v, position, id);
TextView _tempName= (TextView)v.findViewById(android.R.id.text1);
String _temp = _tempName.getText().toString();
TextView _tempPhone = (TextView)v.findViewById(android.R.id.text2);
String _temp2 = _tempPhone.getText().toString();
Intent intent = new Intent(this, ContactView.class);
intent.putExtra("contactName", _temp);
intent.putExtra("contactPhone", _temp2);
startActivity(intent);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
The second activity (where the button is ) :
public class ContactView extends ActionBarActivity {
Button _Call;
Button _Favorite;
FavoriteContact contact = new FavoriteContact();
sqlDatabaseAdapter helper;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_contact_view);
_Call = (Button)findViewById(R.id.bCall);
_Favorite = (Button)findViewById(R.id.bFavorite);
contact.setName(getIntent().getExtras().getString("contactName"));
contact.setPhone(getIntent().getExtras().getString("contactPhone"));
setTitle(contact.getName());
}
public void contactFavorite(View view)
{
long id = 0L;
id = helper.insertData(contact.getName(), contact.getPhone());
/*
if( id < 0)
{
Message.Message(this, "Unsuccessful");
}
else
{
Message.Message(this, "Successfully inserted to favorite contacts ");
}
*/
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_contact_view, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
Contact class i created and FavoriteContact class :
(favoritecontact extends Contact)
public class Contact
{
private String Name = null;
private String Phone = null;
public String getPhone() {
return Phone;
}
public void setPhone(String phone) {
Phone = phone;
}
public String getName() {
return Name;
}
public void setName(String name) {
Name = name;
}
}
public class FavoriteContact extends Contact
{
private Boolean isFavorite;
public Boolean getIsFavorite() {
return isFavorite;
}
public void setIsFavorite(Boolean isFavorite) {
this.isFavorite = isFavorite;
}
}
i think i gave everything i need...
sorry for my bad english and its my first time posting here so i dont rly know how it works :D
thanks for every bit of help .
The variable helper is never initialized in ContactView.
I have a problem with Titan 0.5.1. I try to upgrade Titan 0.4.4 to 0.5.1. Currently, I use berkeleyje and i configure like this :
BaseConfiguration conf = new BaseConfiguration();
// Storage info
conf.setProperty("storage.directory", directory + File.separator + DB_NAME);
conf.setProperty("storage.backend", "berkeleyje");
// Class info storage
conf.setProperty("attributes.allow-all", "true");
conf.setProperty("attributes.custom.attribute1.attribute-class", "model.Property");
conf.setProperty("attributes.custom.attribute1.serializer-class", "PropertySerializer");
TitanGraph graph = TitanFactory.open(conf);
For serialize my object i use :
public class PropertySerializer implements AttributeSerializer<Property> {
#Override
public Property read(ScanBuffer buffer) {
Property object = null;
ArrayList<Byte> records = new ArrayList<Byte>();
try {
while (buffer.hasRemaining()) {
records.add(Byte.valueOf(buffer.getByte()));
}
Byte[] bytes = records.toArray(new Byte[records.size()]);
ByteArrayInputStream bis = new ByteArrayInputStream(ArrayUtils.toPrimitive(bytes));
ObjectInput in = new ObjectInputStream(bis);
object = (Property) in.readObject();
} catch (IOException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
return object;
}
#Override
public void write(WriteBuffer out, Property attribute) {
try {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
ObjectOutput outobj;
outobj = new ObjectOutputStream(bos);
outobj.writeObject(attribute);
byte[] propertybyte = bos.toByteArray();
for (int i = 0; i < propertybyte.length; i++) {
out.putByte(propertybyte[i]);
}
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
public void verifyAttribute(Property value) {
// TODO Auto-generated method stub
}
#Override
public Property convert(Object value) {
// TODO Auto-generated method stub
return null;
}
}
Typically, i add a property like this :
Vertex r = this.model.addVertex(null);
Property p = new Property();
r.setProperty("object", p);
this.model.commit();
But i obtain this error :
Exception in thread "main"
com.thinkaurelius.titan.core.TitanException: Could not commit
transaction due to exception during persistence at
com.thinkaurelius.titan.graphdb.transaction.StandardTitanTx.commit(StandardTitanTx.java:1310)
at
com.thinkaurelius.titan.graphdb.blueprints.TitanBlueprintsGraph.commit(TitanBlueprintsGraph.java:60)
Caused by: com.thinkaurelius.titan.core.TitanException: Serializer
Restriction: Cannot serialize object of type: class
.model.Property at
com.thinkaurelius.titan.graphdb.database.serialize.StandardSerializer$StandardDataOutput.writeClassAndObject(StandardSerializer.java:160)
at
com.thinkaurelius.titan.graphdb.database.EdgeSerializer.writePropertyValue(EdgeSerializer.java:383)
at
com.thinkaurelius.titan.graphdb.database.EdgeSerializer.writePropertyValue(EdgeSerializer.java:377)
at
com.thinkaurelius.titan.graphdb.database.EdgeSerializer.writeRelation(EdgeSerializer.java:293)
at
com.thinkaurelius.titan.graphdb.database.StandardTitanGraph.prepareCommit(StandardTitanGraph.java:485)
at
com.thinkaurelius.titan.graphdb.database.StandardTitanGraph.commit(StandardTitanGraph.java:613)
at
com.thinkaurelius.titan.graphdb.transaction.StandardTitanTx.commit(StandardTitanTx.java:1299)
Can you help me please ? Because, with 0.4.4 version it worked. The new documentation don't help me.
Thanks in advance
I'm new to android development and right now I'm trying to parse an J SON array into object and then save each object into a array list then display the array list with a array adapter. But, right now I can only get the array adapter to display the last element.
Here is the main class
public class Venue extends Activity {
Venue_Listing venue = new Venue_Listing();
ArrayList<Venue_Listing> venueList;
ListView listview;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listview = (ListView) findViewById(R.id.list);
new GetVenus().execute(URL);
venueList = new ArrayList<Venue_Listing>();
}
private class GetVenus extends AsyncTask<String, Void, Boolean> {
ProgressDialog dialog;
String data;
protected void onPreExecute() {
super.onPreExecute();
dialog = new ProgressDialog(Venue.this);
dialog.setMessage("Loading, please wait");
dialog.show();
dialog.setCancelable(false);
}
protected Boolean doInBackground(String... url) {
try {
HttpGet httppost = new HttpGet(url[0]);
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response = httpclient.execute(httppost);
int status = response.getStatusLine().getStatusCode();
if (status == 200) {
HttpEntity entity = response.getEntity();
data = EntityUtils.toString(entity);
}
return true;
}
catch (ParseException e1) {
e1.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
}
return false;
}
protected void onPostExecute(Boolean result) {
dialog.cancel();
Venue_Listing_Adapter adapter = new
Venue_Listing_Adapter(getApplicationContext(),R.layout.venue_list_layout, venueList);
try {
JSONArray jarray = new JSONArray(data);
for (int i = 0; i < jarray.length(); i++) {
JSONObject object = jarray.getJSONObject(i);
if (venue != null) {
venue.SET_ID(object.getString("venue_ID"));
venue.SET_NAME(object.getString("name"));
listview.setAdapter(adapter);
}
}
}
catch (JSONException e) {
e.printStackTrace();
}
}
}
}
This class holds all the J SON parse data
public class Venue_Listing {
private String ID;
private String NAME;
public Venue_Listing() {
}
public Venue_Listing(String ID, String NAME) {
super();
this.ID = ID;
this.NAME = NAME;
}
// setter & getter....
And here is what I have for my array adapter
public class Venue_Listing_Adapter extends ArrayAdapter<Venue_Listing> {
private ArrayList<Venue_Listing> objects;
public Venue_Listing_Adapter(Context context, int resource, ArrayList<Venue_Listing> objects) {
super(context, resource, objects);
this.objects = objects;
}
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = inflater.inflate(R.layout.venue_list_layout, null);
}
Venue_Listing i = objects.get(position);
if (i != null) {
TextView id = (TextView) v.findViewById(R.id.id);
TextView name = (TextView) v.findViewById(R.id.name);
if (id != null ){
id.setText(i.GET_ID());
}
if (name != null) {
name.setText(i.GET_NAME());
}
}
return v;
}
}
Any help would be appreciated
Thank you
Please print and check the values of 'venueList'.
You have not added values in 'venueList' object.
You need to create 'venue' object every time and add object 'venue' in 'venueList'. Hence you are not getting all items in list view.
The Code may go this way: -
Venue_Listing venue;
try {
JSONArray jarray = new JSONArray(data);
for (int i = 0; i < jarray.length(); i++) {
JSONObject object = jarray.getJSONObject(i);
venue = new Venue_Listing();
if (object != null) {
venue.SET_ID(object.getString("venue_ID"));
venue.SET_NAME(object.getString("name"));
venueList.add(venue);
}
}
Venue_Listing_Adapter adapter = new Venue_Listing_Adapter(getApplicationContext(),R.layout.venue_list_layout, venueList);
listview.setAdapter(adapter);
}
catch (JSONException e) {
e.printStackTrace();
}