Android :: How To Make Launcher Open Main Activity?
May 26, 2010
I have activities A and B. The A is the one with LAUNCHER intent-filter (i.e. the activity that is started when we click the app icon on home screen). A launches B using start Activity(new Intent(A.this, B.class)). When the user has the B activity open, and then put my application into the background, and later my application's process is killed, when the user starts my application again, B is opened instead of A. This caused a force close in my app, because A is the activity that initializes the resources my app needs, and when B tried to access the uninitialized resources, B crashes.
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Jul 19, 2010
Im writing a program that offers a quick reply dialog upon receipt of an SMS.
However, I am getting an unexpected result. When I receieve an SMS, the appropriate dialog activity comes up displaying the correct phone number and message, however there is a second activity behind it that is the 'default' activity in my program (it is what opens when i launch my application)
I do not want this second activity to come up. The quick reply activity should come up by itself over top of whatever the user was doing before.
The 'floating' activity:
CODE:.........
The call to the activity inside an onReceive()
CODE:..............
The Manifest:
CODE:.................
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Jan 13, 2010
I'm trying from main Activity (MainFile.java) to open a Map as a new intent through a menu. Something like this...
CODE:..............
And I already have set up thing on my manifest.xml with access to...
CODE:........
It worked fine with other File.class, but with the Map.class doesn't seem to be working.
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Apr 6, 2009
After a long time with one Activity being my app's entry point, I just changed the manifest to point to a different activity to be the entry point. But the G1 is doggedly trying to load the old activity - even after uninstall, install, reboot, etc. and acore throws a security exception. Code...
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Mar 14, 2010
Is it possible to configure an android app so that if a user has opened your app, launched numerous activities, then returns to the home screen and relaunches your app again, instead of going to the main activity they will instead be taken to the activity highest on the stack (the most recent activity in your app)?
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May 16, 2010
I'm writing an application that starts with a loading activity. In the loading activity the app requests html from web and parses the html, then it sends the parsing result to the main activity. The main activity has several tabs, and contents of these tabs are based on the result of parsing.For example, the result of parsing is a list of strings ["apple", "banana", "orange"], and I need to pass this list to main activity, so that the main activity can create three tabs named after three fruits.I would like to know if there is any way to pass a list of strings among activities, BTW, is it the common way of do this?
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Jan 10, 2010
I created an application which enables the user to set whether he wants to receive notification while the application runs in background mode. If the notifications are enabled an activity should be started (the dialog should appear on the screen).
I tried to enabled it the following way:
CODE:...........
This is the method from main activity. When onPause() is executed isRunningInBackground is set true.
When I tried to debug it when the main application was running in the background the line
startActivity(intent) had no effect (the activity didn't appear).
Does anyone know how to midify the logic in order to start an activity from the main activity when the main activity is running in the background (after onPause() is called)?
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Dec 4, 2009
Need an example of how to create/start a new activity from the main activity. I have a button click event on the main layout. Originally I just used setContentView(R.layout.secondactivity); which brings up the layout but I don't think that is correct since the secondactivity class is not instantiated at this point yet. I have looked for such an example and can not find one.
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Jan 10, 2010
I hav an app that is like a relational database. There is a main app activity that users manage things with. There is also a widget that will display important info and add data to the database. When the widget is clicked, a configure class displays a way for the user to edit data. When the configure activity is done, the widget is updated and instead of going back to the home screen, the apps main activity is started. I can't find where the main activity is being called from. Wouldn't I have to create an intent and start Activity() to get this behavior? When done updating, I want the home screen and not my app.
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Nov 7, 2010
I have a main activity, then i call a new activity intent from this. Lets call this SecondActivity. Then from my secont activity i call a browser intent. Then my browser intent call my second activity's onNewIntent method.Evereything work fine, but when i click on "back" button on my phone on my second activity, i will not going to my main activity, but the browsers activity, why?
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Aug 21, 2009
when I click on launcher it does not show displayed activity log for launcher, it shows it way before during boot up stage. why is this happening?
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Sep 25, 2009
when emulator launcher is launched, it launches with default first launcher screen. I want to change that to some other screen. how to do it?
I checked apps/Launcher/src/com/android/launcher/Launcher.java. I think i change setContentView(R.layout.launcher) to my xml file(i.e setContentView(R.layout.trailpg) ) but where to copy my trailpg.xml file. I checked in Launcher/res folder( in layout or layout-land or layout-port).
Whether above analysis is correct? if yes where to put the file.
Provide soln to modify the emulator launcher main screen.
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Apr 29, 2009
On cupcake builds we are unable to open IM app from main menu. When we open the app, it gets closed immediately and adb logs show the following error.
CODE:......
It is trying to load some thirdpartyplugins in packages/apps/IM/src/ com/android/im/app/FrontDoorPlugin.java file. Here it is getting plugins count zero and after that the app gets closed. Do we need some thirdpartyplugins for this to work?
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Jul 30, 2012
Is it possible for an app(or virus) on android to place shortcuts on the main page of my launcher?
If so, how can I find out what is causing this and remove it.
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Jul 24, 2009
My emulator is taking more time to open main page what may be the Problem.
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Aug 2, 2010
I'm beginning to study Android and have a doubt. How do I open a new layout and code (xml and java) by clicking a button on the main scene?
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Nov 30, 2009
From digging around a bit, getAssets() is an inherited method from ContextWrapper. It returns an AssetManager, and using open() it can return an InputStream. What I'm attempting to do at this point, is use the GLSurfuceViewActivity, Cube and CubeRenderer to work and learn off of and read in vertex data from a binary file. I've already created the binary output by parsing a model obj file and added to the assets directory. My Shape class (modified from the Cube class) does not have access to calling getAssets() since it's not a subclass of Activity or ContextWrapper. Once I accepted that, I tried to think of the best way to read in the data (without storing it extra places) to the Shape class. What I did, and seems to be working okay, was modify the Shape and ShapeRenderer constructors to accept an AssetManger as a parameter.
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Oct 5, 2010
Is there a way to manage application activities by hand, like this: user activating an application from menu, it does some initialization, then creates some activity (is it necessar y to declare all activities in the application manifest?), and listens to it's events. On some event application decides to close one activity and open another - so it contains all the application logic. Didn't found anything like this in examples, they all have all the logic in the activity classes. Maybe I need to user Services? (Maybe I don't understand right, what an activity represents. For me it's like window in windows, or Displayable in j2me) I'm very new to android development, trying to understand the basics.
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Apr 6, 2010
I am trying to make a app with the tuotrail of the developerspage, then I would like to display a main.xml in a tabview, instead the textview, wich in the tuotrail,is in the activity.How do I tell my tab in activity do display the main.xml?
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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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Nov 11, 2010
so the application I've written has a service (that tracks GPS data) with a single main activity that binds to it with bindService in it's onStart() method, and unbinds from the service in it's onStop() method using unbindService( ServiceConnection ). I also have an activity which is an options screen, that is launched by pressing a button on the main activity. On this options screen, I have a checkbox that says "Run in background", which, if set to true, means that when the user exits the application with eier the Home or Back buttons, the service will continue running, not turning the GPS off. I do this by calling this.startForeground onUnbind, and this.stopForeground onRebind, if the setting is set to true, and stopping and starting my location reader onUnbind and onRebind respectively if the setting is false. If the service is running in the background, it also displays a notification to ensure the user understands that the GPS is still running and draining their power. This notification is displayed and stopped by relying on the startForeground and stopForeground methods......
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Mar 30, 2010
I'm in a small problem.i have three activities (suppose A,B,C) after performing onclick event in activity A, i can go to activity B and then C..my question is that is there any way to comeback activity A from C..here is the code snippet public void on Create(Bundle Code...
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Mar 29, 2010
My android application has 1 main activity. And it launches some sub-activity (which I wrote) and that also launches some sub-activity (which I wrote). I do this. My question is how can each of my sub-activity and sub-sub-activity get back to the Parent activity? Code...
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May 20, 2010
My problem is that when I start application and user didn't open my PreferenceActivity so when I retrieve them don't get any default values defined in my preference.xml file. Code...
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Sep 2, 2010
Is it possible to create/push-onto-stack a new Activity of the same main Activity in an Android application with an argument passed to the Activities constructor? Specifically from a Dialog object...
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Dec 4, 2009
In android Email app, when I first launch it, it will shows me the 'account setup wizard' activity. But when I launch the Email app(after the account is set) again, it wont' show the 'account setup wizard' activity, it will show the 'Folder list activity ' instead.
How can it does the main activity switch (depends on the email account setup)?
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Oct 28, 2010
While developing an alarm based application, i have stuck in a scenario.
When my alarm is fired, i can receive the event in BroadCastReceiver::onReceive().
Within this function, i want to notify/call a function, which is located on MainActivity.
How to achieve the same?
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Jul 13, 2010
I think I already know the answer to this, but I just wanted to confirm (I think no horrible ramifications)...
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May 9, 2010
Are there any scenarios on Android where a process can be instantiated (classes loaded, etc.) and a non-main activity launched without going through the main activity? Background: my app has a single main activity (android:name="android.intent.action.MAIN" and android:name="android.intent.category.LAUNCHER"), some secondary activities, and a preferences class providing static methods meant to be called from anywhere. These static methods' implementations require a Context, and so the class has a static Context member s_context; the static methods assert that s_context is non-null before using it. The very first thing I do in my main activity's onCreate() method is pass getApplicationContext() into the preferences class so it can set s_context.
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Jun 19, 2009
I created some custom elements and I want to programatically place them to the upper right corner (n pixels from the top edge and m pixels from the right edge) therefore I need to get the screen width and screen height and then set position:
int px = screenWidth - m;
int py = screenWidth - n;
Does anyone know how to get screenWidth and screenHeight in the main Activity?
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