Android :: Update Textview At Runtime?
Jun 26, 2010
I receive data from udp server from my application.when i receive data i have to show that on the screen.I just use the Textview to display the incoming data(textview.setText ("data")).But it displays the last incoming data only.I need to show the previous data also.how to solve this? DatagramSocket clientsocket=new DatagramSocket(6363); byte[] receivedata=new byte[1024];while(true)DatagramPacket recv_packet=new DatagramPacket (receivedata, receivedata.length);textview.setText("UDP S: Receiving");clientsocket. receive(recv_packet);String rec_str=new String(recv_packet.getData()); textview.setText (" Received String "+rec_str); when i use append method it display's after all the incoming finished. I need to view when the data is coming at that time i have to show that.
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Sep 3, 2010
I've got to missing something completely stupid on this one since updating a TextView should be an easy task. I have an Activity class that is an observer of another that receives messages. In my Activity's onCreate I do the following and it works fine.
CODE:..............
However the screen doesn't update. I must be overlooking something...
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Sep 5, 2009
In my android application I have a TextView in a ScrollView.
I want to update TextView dinamically and I write this statement :
mTextView.append(mText); mScrollView.pageScroll(ScrollView.FOCUS_DOWN);
and so my application works. Unfortunately the strings that I have to insert are shown ALL TOGETHER at the end of application.
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Mar 2, 2009
1) I am developing my app in Eclipse 3.4.1 with Android (ver 1.1_r1) plugin. My app compiles and executes without errors when using the Eclipse IDE.
However, when I export my app (unsigned) using Eclipse (via {select project} >right-click>Android tools>export unsigned application package), sign it, and try to run it on the Emulator, it throws a runtime error when I try to update my sqlite database, at which time the specific error created is: SQLite error#14, unable to open database. It is able to read from the database without problems. (I have also verified that the database is: open, is not readonly, is not locked by another thread, is not in the middle of a transaction.)
I have limited experience, but this seems more like a "system" problem given that the app works OK in Eclipse IDE but then fails as an exported/signed apk. Some googling of SQLite resources revealed a similar error on a non-Android platform which was fixed by: "Set your permissions correctly on /var/tmp, or whatever directory you are using to hold temporary files".
Does Android have temporary files, and if so how does it handle permissions on temporary files? Is there a way to check or set these permissions to see if this fixes my problem here?
2) Not sure if it is related, but after I have run the exported/signed app which causes the runtime error, if I reboot the Emulator, and try to run the program using the Eclipse IDE , the program fails with the same exact error. PLUS I also noticed the following error message while the program is installing/running: 03-01 22:22:29.282: ERROR/PackageManager(53): Package com.northwestradiology has mismatched uid: 0 on disk, 10019 in settings; read messages:
I can restore the Eclipse version of my program to be able to execute without runtime errors by utilizing the -wipe-data option for the emulator. But note that if I run my signed APK using an emulator created with the -wipe-data option, it still throws the runtime error listed above...
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Jul 19, 2010
I have an issue with the following error in Android: CalledFromWrongThreadException;: Only the original thread that created a view hierarchy can touch its views. It appears to happen when I try to update a Textview in my Activity, the call to update the TextView is from within my Activity but I still get the above error. I have it like this:
onCreate()
-sets up the buttons and the text view.
onStateChange() - a listener for notifications about state changes, when this gets notification if changes the TextView to say some different text.............
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Jun 14, 2010
I am trying to populate a TextView based on the current selected options in 3 Spinner(s) but cant seem to figure out how to retrieve the selected values from the Spinners to invoke the update function with.
Here is my current code (quite messy but I'm just learning Java,
public class AgeFun extends Activity {
private String[] dayNames;
private String[] yearArray;
private final static int START_YEAR = 1990;
private static TextView textDisp;
private Button calcButton;
private static Spinner spinnerDay, spinnerYear, spinnerMonth;
private static ArrayAdapter<?> monthAdapter, dayAdapter, yearAdapter;
private int year, month, day;
/** Called when the activity is first created. */
@Overridepublic void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
year = 2000;
month = 1;
day = 1;
textDisp = (TextView) findViewById(R.id.textView1);
calcButton = (Button) findViewById(R.id.button);
calcButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// Perform action on clicks
AgeFun.updateAge(year, month, day);
// Month spinner
spinnerMonth = (Spinner) findViewById(R.id.spinnerFirst);
monthAdapter = ArrayAdapter.createFromResource(
this, R.array.monthList, android.R.layout.simple_spinner_item);
monthAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinnerMonth.setAdapter(monthAdapter);
// Day spinner
dayNames = new String[31];
for(int i =1; i <= 31; ++i)
{ dayNames[i-1] = Integer.toString(i);
} spinnerDay = (Spinner) findViewById(R.id.spinnerSecond);
dayAdapter = new ArrayAdapter<CharSequence>(this, android.R.layout.simple_spinner_item, dayNames);
spinnerDay.setAdapter(dayAdapter);
// Year spinner
yearArray = new String[40];
for(int i =0; i < 40; ++i)
{ yearArray[i] = Integer.toString(START_YEAR+i);
} spinnerYear = (Spinner) findViewById(R.id.spinnerThird);
yearAdapter = new ArrayAdapter<CharSequence>(this, android.R.layout.simple_spinner_item, yearArray);
spinnerYear.setAdapter(yearAdapter);
updateAge(2000,1,1);
}private static void updateAge(int year, int month, int day) {
Date dob = new GregorianCalendar(year, month, day).getTime();
Date currDate = new Date();
long age = (currDate.getTime() - dob.getTime()) / (1000 * 60 * 60 * 24) / 365;
textDisp.setText("Your are " + Long.toString(age) + " years old");
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Nov 16, 2010
I want to do something like that. For example, I have a textview with String
Alibaba love Mary so muck. In that String alibaba and Mary have a event to open something but I can't know how to use event for Mary and Alibaba seperately
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Nov 19, 2010
I have an Android activity that, onCreate(), will query a database and display the query results in textviews on the UI.The problem that I am having is at some point, users can open another activity and update the database. When they go back to the original activity, I would like for the text views to update with the new database information (so, I will re query the database and display the info).Another thing that I am willing to do is to take the new input from the user (in the new activity) and directly update the textview in the existing activity (without having the existing activity re-query the database). But I'm not sure how to do something like that either.Can someone please inform me on the best way to go about doing this? The only solution that I have found so far has to do with broadcast receivers, but I'm not sure if that is best suited for what I have to do.
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Jul 14, 2010
I have a ListView that contains an Image on the left of two vertically-oriented TextViews using a RelativeLayout. When both TextViews have text it looks fine. Sometimes the TextView on the bottom won't have any text, and the problem is that the entire layout is several pixels above where it should be because it still reserves that space for text when there isn't any making the entire list have annoying blank gaps. I remember seeing an example of where someone made the layout not reserve the space, but I can't remember how he did it.
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Jan 4, 2014
I'm trying to create a textView in the parent activity onActivityResult but the textView does not appear. There is an ImageView that takes up the whole parent activity. I can create a textView and place it, and it should go on top of the imageView?
In the parent class:
[HIGH]private void addClothes(int menuId) {
Intent chooseClothesIntent = new Intent(this, ChooseClothesActivity.class);
chooseClothesIntent.putExtra("menuId", menuId);
startActivityForResult(chooseClothesIntent, 1);
}[/HIGH]
[Code]...
then in my new activity:
[HIGH]@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
try {
ClothingItem ci = mListContents.get(position);
String imagePath = ci.getImagePath();
[Code]...
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May 4, 2013
In my Android application I have to display article title on corresponding category.
I wish to display the output in following format:
[HIGH]Languages Programming --- Category name on Horizontal listview[/HIGH]
If I have to click Languages which means getting the article title for that selected category alone and displaying on Horizontal listview.
[HIGH]Languages Programming
Tamil Engilsh Hindi Telugu[/HIGH]
If I have to click Programming means need to display the :
[HIGH]Languages Programming
Java C C++[/HIGH]
Now my current status is :
I have to run the app and click Languages which means getting the output is :[code]....
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Apr 28, 2010
I have a TextView that I created in the main.xml. In my app.java I am dynamically positioning that TextView based on where the user taps the screen. The problem I am having is that when I call myTextView.setPadding(100,100,0,0), it moves the actual Text of the TextView, but does not move the Colored Background of the TextView.
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Oct 15, 2010
if there are five text in a text view and we want to pass one of them on click event to the next class text view which method i m used on android
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Nov 15, 2010
I have a problem with TextView in Android
I am making an application like Facebook. In m.facebook.com, when I open it I see they do one thing specailly.
(Alice) is writing on (BackStreetBoy1010938920) wall
Because the width of Mobile screen is small so the real message like tha
(Alice) is writing on (BackStreet
Boy10101009393) wall
I guess they use TextView for (BackStreetBoy1010938920) but I can't do like this.
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Nov 12, 2010
i'm trying to know the database space available. In J2ME you have getSizeAvailable(), but there is no direct replacement in Android, so i thought about doing getMaximumSize() minus database size, the thing is i just can't find a way to know the db actual size, at runtime.
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Aug 30, 2010
How to add items to a ListView in Android during runtime?
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Mar 29, 2010
I'm just getting started with developing for Android. I'm looking to port one of my iPhone applications, but I'm kind of at a loss for how to draw a view at runtime (a view not declared in the XML). Basically, I want to draw a simple rectangle, but then be able to manipulate its frame after being drawn. Sorry if this is a really, really simple question, but I can't seem to find some equivalent to the iPhone SDK here.
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Aug 9, 2010
In my tableview i need to add the scroll view for the particular rows . Is there any way to create like this in android?
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Oct 15, 2010
I want to create n number of rows at runtime after clicking button and 2 number of columns for each rows. I had tried but can't succeed. Anybody knows how to do this?
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Jun 26, 2010
I've been trying to use a mapView in my app, and have been following the tutorial; http://developer.android.com/resources/tutorials/views/hello-mapview. Code...
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Sep 19, 2010
As an additional anti-pirating strategy, I'd like to compute a checksum on my application at runtime. Since my app communicates with a back-end server, I can send the checksum with each message and the server can deny service to altered apps. Not a complete solution to piracy by any means, but a fairly easy way to raise the bar. Anyone know how an app can get access to it's load image at runtime?
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Jul 27, 2010
Is it possible to load my main.xml layout file in onCreate() and then later in the app, switch to a new XML layout? I've tried placing setContentView() later on in the app but that seems to not actually set the new View because my references to objects in the newly set xml layout file are returning as null. I've tried doing some layout inflating using the LayoutInflater but I'm having no luck (I'm probably doing something wrong)... So is there any other way to swap layout xml layouts at runtime?
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Sep 3, 2010
Is there a way to set a style for a View at runtime? I've seen this question a few times on the board here but no answers, so probably not:
<ImageView android:id="@+id/blah" style="@style/mystyle" />
// later... ImageView iv = (ImageView)findViewById(...);
iv.setStyle(R.style.myotherstyle);
Is it not possible to do something like this? We have to manually change everything in code instead?
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Dec 20, 2009
How can the resource drawable xml can be changed at runtime for example. <resources> <drawable name="solid_red">#f00</drawable> <drawable name="solid_blue">#0000ff</drawable> <drawable name="solid_green">#f0f0</drawable> </resources> can be changed in runtime to <resources> <drawable name="solid_red">#ff00</drawable> <drawable name="solid_blue" >#0000fff</drawable> <drawable name="solid_green">#f0ff0</drawable> </resources>
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Jun 25, 2009
I have a large (900kb) asset in the assets directory which is only used once by the app at initialization time. Is there way for me to delete this file at runtime? If not delete change it's contents to "0" and effectively reduce its size to almost nothing. There isn't really any point of having this take space on the phone's limited memory.
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Nov 3, 2010
I am writing an application that will run on 2.0 and above. Now, I am thinking of adding the Data backup feature to the application. Is there anyway to modify the manifest file to include the metadata only if the phone is using Froyo(2.2). Ideally, i would like to avoid creating a separate application for just Froyo.
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Apr 27, 2009
I'm trying to product a binary that is compatible with 1.1 and 1.5, but i'm having trouble with the ViewSwitcher class behaving different. I'd like to create a wrapper for it, but I need a way to programatically detect the api level at runtime.
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Aug 26, 2010
Is there a way to get the api level ? eg. to an int.
I want to make 1 version of an application but only use AnticipateOvershootInterpolator()
to >3 Api level devices.
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Oct 15, 2010
How do I keep track of the runtime of an application.
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Jul 29, 2010
I know how to use map in application. But i have to use map in particular table row at run time. I have used mapview in my another activity. can i use that map view (by id)
to show map in that row.
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