Android :: Launching Activities Within Tab
Aug 20, 2009
I have an application with three tabs. Through various interactions with the items in the tabs I end up launching other activities. The client has reviewed this and would like the activities launched "within" the tabs, so the tabs remain visible and if the user clicks the tab it goes back to the original activity defined in the setContent function. Is this possible and how would I go about this from other activities? (ie the child activities, not the one that defines the TabHost and has access to call setContent)?
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Jan 25, 2010
I am trying to launch activities under each tab.
I hav tried with following code:....................
I m getting exception as::::::
code:................
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Dec 24, 2009
You can see property action android:name= property is "android.intent.action.MAIN" and categoryandroid:name= is "android.intent.category.LAUNCHER" for all activities.When application starts up, it calls First Activity. Then calls useless Activity such as ThirdActivity or Second Activity.In this case, is my manifest.xml correct?Or, do I need to set another property to Second and Third activity? If so, what is that?I wonder manifest.xml file is right for my case.
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Apr 5, 2010
I want to make an android application that shows a listing of applications (downloaded from the android market) and launches the one that the user selects. From what I've read, I'd have to use intents like this:
Intent intent = new Intent();
intent.setClassName(packageName, className);
startActivity(intent);
I just want to be able to launch the applications, not a specific activity that they could have.
My question is: How could I launch these applications if I don't know their packageName or className? or maybe, how could I get to know their className and packageName, if it's a closed source application that I didn't develop.
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Jun 30, 2010
how to call BarCodeScanner, and return the value to a field.so now, i have a toast that says "successful scan" and then i want to pass the result to a new activity. when i comment out my intent, everything works (minus the passing of data/switching of screen, obviously) but when i run my project as is, it FC's no errors reported by eclipse in code or xml. any insights?
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Jul 8, 2009
I am developing an Android application to launch the another Android application in the device.Please let me know Is there any possible way to do this?
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Jan 13, 2010
How can I code my Android application to start the web browser to display a given URL?(I'd rather not embed a web browser component into my app, but rather want to start the Android web browser to show the URL)
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Jun 1, 2009
Say I have developed 4 applications. Is it possible to group these applications, so that I can access and launch these from one location?
Can the below flow work? Start an Application|Display launchers(icons) for 4 different applications|On click of the icon start the respective application.
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Mar 29, 2010
I have written an application which calls native methods through JNI. In the native library 4 threads are started. On USB removal, the application is to be closed including the native threads. Upon receiving the USB removal event, we are trying to kill the threads (pthread_kill() ) and then finish (using finish()) the activity. After reconnecting the USB, the application is not launching due to memory corruption. In DDMS, it shows the threads are still attached to bionic. As the threads are not closed, I feel the resources were not released properly. If I reconnect again then application launches and works fine and the same repeats on every launch.
To solve this problem Can I use System.gc() ? Can I use pthread_exit() 1st and then pthread_join instead of pthread_kill ? Whats the procedure in Android to kill the native threads and also the application ? After the application is closed, will it not be listed in DDMS ?
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Aug 25, 2010
I know this has been asked a lot of times in StackOverflow already, but I haven't quite found a solution yet. My app sends an email with a link in it that when clicked should launch the app. According to @hackbod, the best way to do it is to make use of the Intent URI (see this). Here's my code that sets the intent and puts it in the email body: Code...
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Jun 9, 2009
I am a newbie and i am using Eclipse on windows Xp. I have installed ADT plugin. When i am running simple helloworld code and running it. Console shows that emulator is launching but there is not emulator displayed. Even i tried 'adb kill-server' & 'adb start- server' and executed ' emulator & ' to start it manually but still there was no change. I need to know whether its installation error or smthing else.
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Sep 7, 2010
I have two activities.A and B. A starts B.Both are running in the screen and both are visible. Say now B is visible.
On a special key press, I want to bring the A to the front and make it active. The problem I am facing is when the special key is pressed, another instance of A is launched and the new instance is brought to the front.
But I want the original A to come to the front. I want to make this change in the framework layer rather than application specific by using the singleInstance theme in the launchMode in AndroidManifest file.
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Jun 30, 2010
I would like to know if I can launch a program via incoming MMS/SMS? More on the MMS side of things.
Workflow:
MMS sent to Android device
self executable MMS
Any thoughts?
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Aug 13, 2010
I would like to write an application which would be launched from the Contacts list in the phone.That is,you choose a contact using the normal contacts application, and where you can dial to the contact, send an Email or SMS,you can also launch my application with this contact's activity.How can this be done?
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Mar 1, 2010
Going through the ApiDemos sample code (in Android 2.1 platform), I saw that there are two activities that make use of the Instrumentation class: ContactsFilter and LocalSample. However, I'm having trouble finding the menu that will launch any one of these activities from the ApiDemos application. I just want to be able to run ApiDemos and hit the breakpoint in one of these Activities so I can understand how the Instrumentation class works. proper navigation in ApiDemos to launch ContactsFilter or LocalSample?
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Apr 6, 2010
On the market, there's an application called App Protector, which seems to effectively block the launching of configured activities until a password is correctly provided. By default, it blocks access to itself (not very interesting), Settings, and a few others. I wrote my own app to launch settings (rather than doing so through the home screen) and App Protector continued to do the job it claims to do.
When an activity that is protected is started, App Protector's password input activity is shown instead. Once the correct password is provided, the activity that was started comes to the front.
First -- does anyone know how this app is able to get between the rest of the system and the activities it protects? I would like to do something along these lines in my own application as well. Perhaps this app is receiving a broadcast about other activities coming to the foreground, and when the foreground activity is protected, it forces itself to the foreground?
Second -- does anyone know how well this technique will stand up to attack? Are there other ways to circumvent, where start Activity(...) fails to? It seems that one could use adb to un install it, thus removing its protection easily, but if I pursue my plans here, the app will be a part of a device's firmware (which, I assume, offers some protection against its apps being installed?)
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Sep 30, 2010
I want to launch my application in market. I ahd go to http://market.android.com/publish/signup but there they are asking for Website URL. But i don't have any website then what should I enter there? or is it necessary to have our own website to launch application in market?
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Apr 14, 2009
My app has 4 activities on the stack A->B->C->D (top)
If you press home and re-enter the application, another instance of A is started, so the stack is A->B->C->D->A (top). I know this because when I press BACK, A is popped off and I now see D (instead of going to the Home screen).
What I want is that when the user re-enters the app, they re-enter on the same activity they were in before (D).
CODE:................
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Mar 17, 2009
Is it possible to re-use all the instances of Activities and Services when an application is launched twice. For instance: 1/ I start my application APP1. Some activities are launched and a service is started. 2/ I click "Home" device button 3/ I can see the icon the launch again my application APP1 4/ I click on it and the APP1 is launched twice
I would like to re-use the existing the instances of Activities and Services from the first launch. I guess it is related to "SingleTop" or "SingleTask" but it doesn't seem to work.
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Nov 9, 2009
Is it possible to launch an app widget from another application.
For example, I have a button in an application. When I click on that button, an appwidget must be launched.
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Dec 29, 2009
I would like to launch an app the user selects from within my application. However, I'm not sure how I'd go about doing this. I've tried this:
Intent intent = new Intent();
intent.setAction(Contacts.Intents.SHOW_OR_CREATE_CONTACT);
startActivity(intent);
But this seems to throw an error and force close my application. I also tried adding:
<action android:name="Contacts.Intents.SHOW_OR_CREATE_CONTACT"/>
in the AndroidManifest file, but to no avail.
A look at Logcat shows that it's an "IOexception - no such file or directory". A couple of questions arise from this. I read through the Android docs and noticed that the Contact.Intents class is deprecated. However, it's successor, ContactContracts is aimed at API level 5 whereas I'm targeting API level 3. Could this be the problem? Also, I've hardcoded this application into the code. Is there a way to retrieve the intents of any application the user selects so that they can be launched?
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Oct 13, 2010
I want to launch an application in the phone by clicking its link in the browser..
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May 22, 2010
I am trying to launch another application from my Activity. Something weird happens when I am running this code :
Intent myIntent = new Intent( Intent.ACTION_MAIN, null );
myIntent.addCategory( Intent.CATEGORY_LAUNCHER );
myIntent.setFlags( Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED );
ComponentName compName=new ComponentName(myArray[i][0], myArray[i] [1] );
// String[][] myArray myIntent.setComponent( compName ); startActivity( myIntent );
I have this error :
android.content.ActivityNotFoundException: Unable to find explicit activity class { com.android.settings/com.android.settings.Settings};
Have you declared this activity in your AndroidManifest.xml?
But when I replace this line
// myArray[i][0] = "com.android.settings" // myArray[i][1] = "com.android.settings.Settings" ComponentName compName=new ComponentName(myArray[i][0], myArray[i] [1] );
with ComponentName compName=new ComponentName("com.android.settings","com.android.settings.Settings");
And without any modification in my manifest, it works!
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Aug 9, 2010
I am implementing a simple app. I need to start an activity based on the state of the Activity. Lets take i am using a button to start the activity.
1. If the activity is not started, I need to start XYZ activity.
2. If the XYZ activity is on focus, then i need to close the activity on the button press.
3. If the XYZ activity is not in focus (like onPause) state then, I need to change the button state.Can you please help me in the flags that i need to use for starting the intent. Is it possible to get the state of activity before I start that activity?
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Nov 1, 2010
Writing a basic application. One of the features I'm interested in trying to do would be to launch another app, INSIDE the app already running. Eg. have an app with 3 menu options, 1 and 2 do certain tasks as part of this parent app, menu option 3 however launches another app thats installed on the phone. I'm unsure if this is possible?
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Sep 2, 2009
I had written landscape app. which use surface view and camera. It works fine mostly. However, The weird thing is that the app sometimes (once a 5~6 times) freezes when I started it. The DDMS spits out following log. 09-02 10:58:29.191: WARN/WindowManager(1132): App freeze timeout expired. 09-02 10:58:29.201: WARN/WindowManager(1132): Force clearing freeze: AppWindowToken{43b4ea00 token=HistoryRecord{4386bcc0 {com.home.camera/ com.home.camera.Camera}}} 09-02 10:58:29.251: WARN/Surface Flinger(1132): timeout expired mFreezeDisplay=1, mFreezeCount=0 Code...
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Aug 16, 2009
Is there a way to launch a playlist whith intent? I can retrieve the path of the m3u playlist with: Cursor cursor = context.getContentResolver().query (MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI, null, null, null, null); cursor.getString(cursor.getColumnIndex (MediaStore.Audio.Playlists.DATA)); But, I can't launch this m3u file neither with Intent nor with MediaPlayer.
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Mar 7, 2009
Is there a way to launch a dialog (say, the dialog I show to users the first time they launch the app) from a preferences entry? I don't see any examples doing this in the API Demos, nor have I seen it out in the wild. I do see a class called DialogPreference, but this doesn't seem to be what I want.
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Jul 22, 2010
I'm not sure if this can be done, but is it possible to launch an activity from text that has been Linkified? I'm basically providing an illustrated glossary, and when the user clicks on a highlighted term, I want the activity that handles display of the image and associated text to fire up. I also need to pass in some parameters to the activity being launched.
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May 6, 2010
I have a TabActivity that loads in 3 activity classes.In those Activity classes I have a button and an OnClickListener that tries to open a MapActivity class.I have searched to find an example of an Activity class launching a MapActivity class but cannot find one. If I swap out my MapActivity class with a Activity class it works.
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