Hi I am very new to Android and I am having some issues with putting the username (retrieved by using the web services) into the Action bar.
The problem is that the username is not displayed and is shown as 'null' when I first enter the page that I want to show the username in. It is only displayed when the page is loaded the second time (i.e. it is only displayed when I go to another page and then come back to the page that I want to display the username in).
I would like the username to be displayed in the action bar even when the page is loaded the first time, but I have no idea what the problem is.
Can someone please help me to solve this issue? Thank you very much in advance.
Here is my code:
In the 'menu', I have added in an item with android:actionViewClass="android.widget.TextView":
<item
android:id="@+id/viewusername"
android:orderInCategory="1"
android:title="@+id/viewusername"
android:showAsAction="always"
android:actionViewClass="android.widget.TextView"/>
To put the username inside the actionbar, I have used the onPrepareOptionsMenu method:
@Override
public boolean onPrepareOptionsMenu(Menu menu)
{
MenuItem menuItem = menu.findItem(R.id.viewusername);
TextView showusername1 = (TextView) menuItem.getActionView();
showusername1.setText(String.valueOf(username) );
return super.onPrepareOptionsMenu(menu);
}
This is the method that I used to retrieve the username from the web services (I have used an EventHandler):
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_dashboard);
Button incident = (Button) findViewById(R.id.CreateNewIncidentButton);
SharedPreferences pref = getApplicationContext().getSharedPreferences("MyPref", 0); // 0 - for private mode
Editor editor = pref.edit();
Bundle extras = getIntent().getExtras();
if (extras != null) {
name = extras.getString("ID");
}
incident.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Switching to Register screen
Intent i = new Intent(getApplicationContext(), CreateIncident.class);
startActivity(i);
}
});
Button request = (Button) findViewById(R.id.CreateNewRequestButton);
request.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Switching to Create new request screen
Intent i = new Intent(getApplicationContext(), CreateRequest.class);
startActivity(i);
}
});
Button queue = (Button) findViewById(R.id.ViewMyTicketsButton);
queue.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Switching to Register screen
Intent i = new Intent(getApplicationContext(), ViewMyTickets.class);
startActivity(i);
}
});
getUsersName();
}
public void getUsersName() {
methodName ="getUsersCombo";
VectorString getUsersCombo = new VectorString(); //creates a new instance of VectorString
String[] usersCom = { "combo_name"}; //array of values
for (String s : usersCom) { //adds strings to getTicketInfo
getUsersCombo.add(s);
}
EventHandlerDashboard handler2 = new EventHandlerDashboard(this);
USD_WebService usdw2 = new USD_WebService(handler2,"http://dsl-116040f.datacom.co.nz:8080/axis/services/USD_R11_WebService?WSDL",60);
SharedPreferences pref = getApplicationContext().getSharedPreferences("MyPref", 0); // 0 - for private mode
Editor editor = pref.edit();
int usersSid = pref.getInt("sid",0);
String username = pref.getString("username","");
try {
//adds all the values to the web service call
usdw2.doSelectAsync(usersSid, "cnt", "userid="+"'"+username+"'", -1, getUsersCombo);
} catch (Exception e) {
e.printStackTrace();
}
}
public void receiveResults(String result7){
try {
DocumentBuilderFactory dbf =
DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
InputSource is = new InputSource();
is.setCharacterStream(new StringReader(result7));
Document doc = db.parse(is);
NodeList nodes = doc.getElementsByTagName("UDSObject");
// iterate the employees
for (int i = 0; i < nodes.getLength(); i++) {
Element element = (Element) nodes.item(i);
NodeList name = element.getElementsByTagName("AttrName");
Element line = (Element) name.item(0);
System.out.println("ID: " + getCharacterDataFromElement(line));
NodeList title = element.getElementsByTagName("AttrValue");
line = (Element) title.item(0);
System.out.println("ID Value: " + getCharacterDataFromElement(line));
userID = getCharacterDataFromElement(line);
username= "Welcome, "+userID;
}
}
catch (Exception e) {
e.printStackTrace();
}
System.out.println("users comboname"+result7);
}
public static String getCharacterDataFromElement(Element e) {
Node child = e.getFirstChild();
if (child instanceof CharacterData) {
CharacterData cd = (CharacterData) child;
return cd.getData();
}
return "?";
}
Note: this method works perfectly fine when it is used in the TextView of the layout but it has issues when I try to use it in the action bar.
Update: It works now:
@Override
public boolean onPrepareOptionsMenu(Menu menu)
{
MenuItem menuItem = menu.findItem(R.id.viewusername);
TextView showusername1 = (TextView) menuItem.getActionView();
showusername1.setText(usersname==null?"":String.valueOf(usersname) );
return super.onPrepareOptionsMenu(menu);
}
And
getUsersName();
}
public void getUsersName() {
methodName ="getUsersCombo";
VectorString getUsersCombo = new VectorString(); //creates a new instance of VectorString
String[] usersCom = { "combo_name"}; //array of values
for (String s : usersCom) { //adds strings to getTicketInfo
getUsersCombo.add(s);
}
EventHandlerDashboard handler2 = new EventHandlerDashboard(this);
USD_WebService usdw2 = new USD_WebService(handler2,"http://dsl-116040f.datacom.co.nz:8080/axis/services/USD_R11_WebService?WSDL",60);
SharedPreferences pref = getApplicationContext().getSharedPreferences("MyPref", 0); // 0 - for private mode
Editor editor = pref.edit();
int usersSid = pref.getInt("sid",0);
username = pref.getString("username","");
try {
//adds all the values to the web service call
usdw2.doSelectAsync(usersSid, "cnt", "userid="+"'"+username+"'", -1, getUsersCombo);
} catch (Exception e) {
e.printStackTrace();
}
}
public void receiveResults(String result7){
try {
DocumentBuilderFactory dbf =
DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
InputSource is = new InputSource();
is.setCharacterStream(new StringReader(result7));
Document doc = db.parse(is);
NodeList nodes = doc.getElementsByTagName("UDSObject");
// iterate the employees
for (int i = 0; i < nodes.getLength(); i++) {
Element element = (Element) nodes.item(i);
NodeList name = element.getElementsByTagName("AttrName");
Element line = (Element) name.item(0);
System.out.println("ID: " + getCharacterDataFromElement(line));
NodeList title = element.getElementsByTagName("AttrValue");
line = (Element) title.item(0);
System.out.println("ID Value: " + getCharacterDataFromElement(line));
userID = getCharacterDataFromElement(line);
usersname = "Welcome, "+userID;
}
}
catch (Exception e) {
e.printStackTrace();
}
System.out.println("users comboname"+result7);
invalidateOptionsMenu(); // This works on Android 3.x devices only
}
public static String getCharacterDataFromElement(Element e) {
Node child = e.getFirstChild();
if (child instanceof CharacterData) {
CharacterData cd = (CharacterData) child;
return cd.getData();
}
return "?";
}
