Android : Updating Chat Data UI From Different Activity Method?

May 4, 2010

I have a tab widget where one of the tabs is a chat-type feature. I want to update the chat data at an interval (variable depending on whether the chat tab is active or not).

The best approach seemed to be using an AsyncTask in my main TabActivity class, as that would avoid any issues of the chat activity being destroyed while in the background, while an AsyncTask was running. I wanted to ensure that the Activity isn't destroyed and recreated, thus causing my AsyncTask to be unable to modify the actual active Activity's data.

However, now that my AsyncTask is in the TabActivity activity, I don't have a direct way to call my Chat's ListAdapter notifyDataSetChanged() from my onPostExecute() method anymore. Is there a way to get a reference to a given Tab's current Activity from the TabHost/TabActivity?

Or, alternatively, can I assume my chat activity will never be destroyed as a child activity of the TabActivity activity (well, never destroyed while the TabActivity is active at least), and then just put the AsyncTask in the Chat Activity?

Android : Updating chat data UI from Different Activity Method?


Android :: How To Call A Method From Outside An Activity?

Apr 21, 2009

I have a java class Poker.java and an Activity .GameWindow in GameWindow.Java. In the GameWindow activity i have a method...

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Android : Way To GetContentView() Method For Activity?

Sep 17, 2010

The Activity class has a setContentView() method. The PopupWindow Class has a getContentView() method but nothing else does. Is there another way to get the main content view for an activity?

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Android : Using Method From A Service In An Activity?

Feb 16, 2010

I have the folowing method in a Service in my appplication: Code... Do I have to do an AIDL or is there a simpler way?

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Android :: Service Updating Main Activity Gui

Aug 24, 2010

I have a service which collect data and send them to a certain URL and updating the main activity GUI, so which is better in the performance to use a long service with listeners to collect the data and threads in it to update the GUI and sends to the internet or to make another service responsible for updating the GUI and sending to the URL only while the first one just collects the data?

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Android :: Updating Activity From Asynchronous Service

Apr 2, 2010

I've implemented a service that does an asynchronous sync between my application and google docs. I want to update the top level activity of my application when the sync is complete. However because of the service it's possible that the app could be be in a unknown state. Is there a way to make the top level activity, whatever that may be, recreate itself from an asynchtask in a service.

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Android :: Best Practice On Updating UI From BroadcastReceiver To A Certain Activity?

Jul 18, 2010

When i have a broadcastReceiver say android.intent.action.MEDIA_BUTTON and i want to update the current activity's UI without creating a new activity, is there any good practice on this one?

What i know (might not be correct)

1) I can put the BroadcastReceiver in the same class as the activity and call the updateUI function after certain activity

2) Create a ContentObserver?

3) Communicate to a service created by the activity, use aidl. (I dont know how to get the current service if its registered from an activity)

4) Create a custom filter on the broadcastReceiver located on the same class as the activity, and use context.sendBroadcast(msg of custom filter) and in the custom filter call updateUI (same as one but more generic?)

The final flow is it would come from a BroadcastReceiver and ends up updating the UI without renewing the activity (unless the activity is dead?)

Kindly provide links/source code on your how you tackle this kind of problem.

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Android :: How To Get Method Of Listactivity From Activity Class?

Apr 19, 2009

Can i call method of Listactivity from Activity class? I have creates Intent object of myListActivity class and called startIntent() from myActivity class.

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Android : How To Start An Activity In OnPause Method?

Aug 10, 2010

I have a webview and when I do some java-script processing on it. I click on a link to play a video, after the video finishes in full screen. I want to return to my webpage in the same state I left it before clicking to play the video. How can I do it? Any snippets?

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Android :: Data Remain After Updating

Jun 24, 2010

I need some clarification regarding Updating android OS version. Currently my mobile is running on android-1.6 and i have installed so many applications, some of them are dealing with the databases. If i update my mobile with android 2.1 version, will the data still remains same? What about the Preference variables information that are saved in the android phone memory if i do FACTORY RESET?

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Android :: Different UI Behavoir Between Activity And Input Method Service

May 20, 2009

I came to this issue : I created a layout with only 1 ImageButton and it works as expected when loaded from Activity (using setContentView) : The button is changing background on touch down event (orange) But not changing when the same layout is loaded by the InputMethodService (but it react to onClickEvent if used ) Here is a minimal project and video if you need to reproduce : http://rzr.online.fr/tmp/rzr-test-android-imf-0.0.20090520.tar.gz

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Android :: ExpandableListView - Exception In The OnCreate Method Of An Activity

Mar 3, 2010

I am encountering an exception in the onCreate method of an activity.

CODE:.......

The onCreate method is as below.

CODE:......

The layout view XML is as below.

CODE:..........

I've already changed the ID of the ExpandableListView to "list". But it is not effective.

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Android : How To Call An Activity Method From Another Java File

Oct 30, 2009

I have following problem: I have my "MainActivity". In this Activity, i start a thread (SaxParser in another "normal" java file). Now I want to call a method from the MainActivity out of the normal java file? I have read something of an Application object, but i only find things, where i have to create a new Intent. Is it possible to use the application object in the other "normal" java file like that: Code...

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Android : Access A Method Of An Activity Inside TabActivity?

Oct 1, 2010

I would like to access the public method of an Activity run by a TabActivity using: Code...

Basically, what I what is to let the parent Activity call a method in child Activity in order to do something. Is this possible?

I did try this:((TeamHuddleScreenMsgsView)getTabHost().getCurrentTabView().getContext()).refreshModel(); but I'm encountering a ClassCastException. It seems that the getContext() still gives the TabActivity. Any help on how to get the child Activity?

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Android : Unable To Bind OnClick Xml Onto A Method In My Activity

Nov 22, 2010

I've got the following Button declared in my main.xml And I have the following methods in the activity. Code...

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Android : Start Activity From Within OnReceive Method Of BroadcastReceiver?

Feb 3, 2009

I am trying to get a UI to present itself when an incoming SMS happens. When that happens, I would like to present a UI to the user.

I have a BroadcastReceiver class that listens to the SMS_RECEIVED event. I also have an Activity class that is capable of displaying the needed UI when the event happens.

The questions is: How do I start the activity from within the onReceive method of BroadcastReceiver?

I know others have done this but I can't seem to find any resources that illustrates how.

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Android :: Android Activity Call Another Activity Method

Jun 7, 2010

A TabActivity start other activity when i click on a tab,

How to send information to parent (tabActivity) and don't finish current activity?

My tabactivity start another activity like this :

CODE:............

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Android :: OnKeyDown Activity Method Triggered For Long Clicks

Dec 10, 2009

I have an activity which overrides the onKeyDown method. The documentation states the following about onKeyDown: "Called when a key was pressed down and not handled by any of the views inside of the activity." The problem I have is that this method is being called even when the views inside the activity handle it. I have a button implementing a longPress listener. What I see on debugger when long clicking on the button with the center key is that first onKeyDown from the activity is called then the longPress listener from the button gets triggered. Even for Textviews, when long clicking on it with the center select, the activity onKeyDown gets triggered before the TextView processes the longclick (and shows the Input Method context menu).

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Android :: How To Stop Service Method Of Calling Activity Class?

Jul 2, 2010

I am trying to call my service class's stopService() method from my activity. But I don't know how to access stopservice method from my activity class. I have the below code but its not working. This is HomeScreen class:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
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enablecheck.setOnCheckedChangeListener(new OnCheckedChangeListener(){
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// TODO Auto-generated method stub
if(enablecheck.isChecked()){
startService(new Intent(HomeScreen.this, AutoService.class));
} else {
stopService(new Intent(HomeScreen.this, AutoService.class));
} } });
}
This is Service Class:
public class AutoService extends Service {
private static final String TAG = "AutoService";
private Timer timer;
private TimerTask task;
@Override
public IBinder onBind(Intent intent) {
return null;
} @Override
public void onCreate() {
Toast.makeText(this, "Auto Service Created", Toast.LENGTH_LONG).show();
Log.d(TAG, "onCreate");
int delay = 5000; // delay for 5 sec.
int period = 5000; // repeat every sec.
timer = new Timer();
timer.scheduleAtFixedRate(task = new TimerTask(){
public void run() {
System.out.println("done");
} }, delay, period);
}
@Override
public boolean stopService(Intent name) {
// TODO Auto-generated method stub
timer.cancel();
task.cancel();
return super.stopService(name);
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Android :: What Method Of Main Activity Executes When Application Closes?

Oct 29, 2010

Can anybody tell me what method of an activity executes when an application closes?. Like I have a main activity and if I press back button on my phone. The Application closes so I want to know what method executes at that time.

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Android :: How To Trigger Intent To Execute Specific Method From One Activity?

Jun 13, 2010

I've been searching a way to implement an intent so when a user clicks on a notification, an specific method from an activity is executed (or an specific behavior happens). Right now I'm thinking about using broadcast but I don't know if this is the best way to implement this functionality. How would you implement it?

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Android :: Method Of Service Does Not Take Place Immediately From Inside Activity

Aug 6, 2010

I have an activity A which uses SharedPreferences to share data with a service S, which is called from within A.Now when I call the stopService() method from A, the onDestroy() method in S is not called immediately.I thought that all the activities and services under a single apk run in just one process. Why then does the jump to onDestroy() not take place immediately instead I can see the output from onDestroy() after the further code in the activity A is executed.

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Android :: Cannot Call Method Of View Object Inside Activity

Nov 7, 2010

In my program I have a custom view object. Inside the view class is a method called foo. For some reason when I call foo from my activity, it doesn't fire. Here is the code:

XML of the custom view:
<com.company.application.MyView android:id="@+id/my_view" android:layout_width="wrap_content" android:layout_height="wrap_content" />

The activity code:
public class Main extends Activity { MyView mView;
/** Called when the activity is first created. */
@Override public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState); setContentView(R.layout.main);
LayoutInflater li = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View v = li.inflate(R.layout.main, null); mView= (MyView) v.findViewById(R.id.my_view);
//A button to fire the method inside foo() Button switchLeft = (Button) findViewById(R.id.switch_left); switchLeft.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { callTest(); } } );
} public void callTest() { Log.w(this.getClass().getName(), "clicked left arrow");
mView.foo(); mView.postInvalidate();
} }

Finally here is foo:
public void foo() { mBackground = mContext.getResources().getDrawable(R.drawable.temp_canvas); Log.w(this.getClass().getName(), "background set");
}

The first log is always written when the button is pressed, but the second log is not because foo never fires. What is the deal here? Upon request, the full view

public class MyView extends View { Drawable mBackground; Context mContext;
public MyView (Context context) { super(context); mContext = context;
mBackground = mContext.getResources().getDrawable(R.drawable.leftarrow1);
} public MyView (Context context, AttributeSet attrs) {
super(context, attrs); mContext = context;
mBackground = mContext.getResources().getDrawable(R.drawable.leftarrow1);
} public void foo() { mBackground = mContext.getResources().getDrawable(R.drawable.temp_canvas);
Log.w(this.getClass().getName(), "background set"); }
@Override public void onDraw(Canvas canvas) { Paint paint = new Paint();
paint.setStyle(Paint.Style.FILL); // draw a solid blue circle
paint.setColor(Color.BLUE); canvas.drawCircle(20, 20, 15, paint);
// draw a test background mBackground.setBounds(0, 0, 300, 400);
mBackground.draw(canvas); }
}

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Android :: IM - Chat App That Supports AIM - Facebook Chat - And Skype

Jul 26, 2010

After looking through this site and others, it seems that there are a ton of great apps that support AIM and FB (eBuddy comes to mind), but none that support those two and Skype. So, does anyone know of an app that does this?

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Android :: Data Of Previous Activity Gone When New Activity Starts

Dec 30, 2009

I am developing an application in which the user require to register first and than got the user page. For that i have made layout and the layout consist many fields, so, i have made part of layout and also made the separate activity for the each layout. The layout like address, phone, etc... After that i have wrote the code for calling an activity and it works fine. It means when i press the "Next" button the another page will come and it will also consist some textview ,edittext and previous and next button. Actually, i want something different like -- When the user fill the first form and he will proceed to next, the content written by the user should not gone when the user press "Next" button. The content should be there which was written by user. And same way i have have 6 pages like that way to complete the registration process. So, have you any idea to solve above problem? I really need your help because right now i stuck at this point. So, please any body help me out of this problem. I would appreciate your help. I am waiting for your reply.

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Android :: Best Method For Displaying Table Data?

Jun 3, 2010

I want to do a RSS reader, which would display an image (left alignment, text running around it) a Title flowing next to it, and a description, also running around the image.
What is the best method to do this in Android?

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Android :: Call Method In Main Activity From Custom View Class

Aug 8, 2010

I am using the following method in a new application I'm developing. There is a main activity, which instantiates different classes that extends RelativeLayout and I'm using setContentView to switch between the different modules of the application. I wonder if this is a good approach or necessarily I have to use different activities to the several screens the app haves.

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Android :: How Local Service Can Invoke A Sync Method On It's Main Activity?

May 2, 2010

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Android :: Activity Execute OnDestroy() / OnCreate() Method When Push On Keyboard

May 2, 2009

I use sdk 1.5 version and same to my handphone, my handphone is use G1. Now i test my application on my handphone. When i push on keyboard, i found system will destroy current activity(execute onDestroy() method) and execute onCreate() method again. So i will all current status and all datas. I don't wish this happen, how to block system execute onDestroy() and onCreate() when i open and close keyboard?

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Android :: Any Method To Access Data Portion On Phone?

Aug 31, 2009

I want to store some images into the /data folder,is it possible? And how to do?

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