Android :: Implicit Intent - Call To Another Activity Doesnt Work If Action Name Is Defined As User Defined Names

Sep 8, 2010

implicit intent with class name as action defined in intentfilter. is not working. Only it it is defined as "android.intent.action." it is picked up ? is it so ?

I have app A with the following in manifest.xml file


In app B, i tried to call the activity in A using below code.


This code works. But not above line.

Android :: Implicit intent - call to another activity doesnt work if action name is defined as user defined names


Android :: Unable To Launch An Activity Using Implicit Intent Specifying Only Action

Mar 5, 2010

I am trying to launch an activity by specifying only its action(custom) defined in its intent filter from an activity in other application. The activity to be launched is the main activity of its application thus have android.intent.action.MAIN & android.intent.category.LAUNCHER set as action and category in its intent filter. Now according to android doc on Intent and Intent Filter, i do not need to specify DEFAULT category at all in this case. But doing the same i am i am unable to launch the activity.

LogCat says, Activity could not be found...

Am i misinterpreting the text or is there something else missing...?

Code, used for calling the activity


Definition of Activity being called in the manifest file


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Android :: User Defined Application Properties?

Aug 28, 2009

Where is the right place to specify general user-defined properties, like a host address or a service mail address ? The properties should be accessible from my activities.

I would like to specify such attributes within the AndroidManifest.xml, but there seems to be no elements available for user-defined properties. So the only way may be to put such properties into a resource file as strings or to hide them into the source code...

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Android :: Get User Defined Environment Variables?

Sep 20, 2010

I would like to use self defined Environment variables in my source code.

I use System.getenv() to do this and the code line looks like this. Log.d("MyTest","== MyEnv " + System.getenv("AP") + " ANDROID_ASSETS:" + System.getenv("ANDROID_ASSETS"));

Before I execute my code I define my AP variable with export: export AP="12345" and the this is my output of set command


Then I execute my code and I get this line from logcat

D/MyTest( 5363): == MyEnv null ANDROID_ASSETS:/system/app

The value for my defined Environment variable is null. Any suggestions on why it didn't work?

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Android :: Saving ArrayList Of User Defined Objects

Aug 10, 2010

I am working on an application where I am saving the state of an application in an ArrayList. Now, to save this state, I tried to use Serialization. But, somewhere in the user defined object, I am using Button, which is not letting me serialize the entire object. I wanted to know, is there any other way of saving this array list between onPause and onResume? I even tried onSaveInstanceState, but it doesn't have support for Array List.

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Android :: How To Check If User Defined Service Is Already Running

Sep 6, 2010

I have a service that is running within the context of my application. It gets invoked at the start of the activity and then gets update when new data is inserted or deleted from the database. The problem is that everytime I start the activity , it restarts the service. As you may have guessed - not a very intuitive design. Therefore I was wondering if there is a way to determine if the service is already running before starting it. I know I can bind to the service but I do not want that since the main activity needs to exits after the database operation is completed. I know for system services, you can get the service details from the application context. How do you do it for user defined service?

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Android : Implement A User-defined Order In Launcher?

Apr 7, 2009

In emulator, the items of GridView(e.g. Launcher) are in alphabetical order. Would you please point me how to implement a user-defined order in Launcher? For example, I'd like 'Browser' to be the first item in Launcher...

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General :: Where Are User Defined Fields In Android Contacts

Apr 29, 2012

Have been a long time user of Outlook and Blackberry and store a lot of information in the User Defined Fields. Those fields seem to have been eliminated from all of the Android Contact Apps. I don't see them in Motorola Corporate Sync, Touch Down or Moxier Mail. Am I missing something, can't believe the developers of Android apps would just skip those fields. Any App that I can store and sync those fields. Google Contacts has the fields. I have just upgraded from a Blackberry Bold to a Verizon Droid Maxx. Love the big screen on the phone, struggling with the touch keyboard and really struggling with losing half of my contact information.

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Android :: Implicit Intent - Same Action For Mutiple Component How It Works

Sep 7, 2010

I couldnt figure out the exact understanding of implicit intents.

When i was going through the tutorial i read about it.

Here are some important points to remember: 1 - Implicit Intents do not specify a target component 2 - Components willing to receive implicit intents have to declare their ability to handle a specific intent by declaring intent filters 3 - A component can declare any number of Intent Filters 4 - There can be more than one component that declares the same Intent Filters and hence can respond to the same implicit intent. In that case the user is presented both the component options and he can choose which one he wants to continue with 5- You can set priorities for the intent filters to ensure the order of responses.

I read this about Implicit Intents.

I couldnt get visualisation of 4th point. So wanted to try it out by writing some examples.

I tested this like below. Wrote two apps.

I had written two activities in one app, CallingActivity & anotherActivity.


One more app,which has two activities like below.


I ran the first app in emulator and pressed home screen, it mean it runs in the background.(Not exited ) Then i opened the second app and clicked a button in frirst activity(testmain) and tried to call setAction ""


But it is opening the activity "results".. It dint showed a options to choose which components( i expected first app ) activity i need to use ?

Am i right in executing in the right context to understand that point no 4 ?

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Android :: Pass User Defined Intend Actions / Can I Create Own And Use In Code

Oct 5, 2009

Is it possible to pass user defined Intend actions?

That is instead of using predefined Intend actions like "ACTION_MAIN" can I create my own action and use it in my code?

If so how do I do that?

I have been surfing for this detail for long but dint find anything useful. Can any of u help me regarding this?

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Android : How Can I Call A Bitmap Defined In A Method Of Another Class?

Nov 19, 2010

I want to call a bitmap from a method in my main class and am unsure how to do it - I have a method: Code...

So basically, how can I place the bitmap in my detectFaces method in my main class and pass it as a bitmap on my imageview in my false class?

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Android :: Open Activity From An Other Application Via Implicit Intent

Aug 20, 2010

I was trying to open an Activity of an other applicatoin by using an implicit Intent. It doesn't work, I thought it is possible to start an Activity of an other Application by using implicit Intent. Or do I missunderstand it?

I added following intent-filter to the AndroidManifest of Application A:


And called the Intent in Application B by using folloing code:


All I get ist, the error message that Application A was stoped unexpectedly.

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Activate Activity From Another One Using Implicit Intent?

Apr 18, 2012

I am trying to activate an activity from another activity using implicit intent.

Code fragment of mail activity:

public void onClick(View view) {
intent = new Intent(Intent.ACTION_SEND);
int id = view.getId();[code].....

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Android :: Call Built-in Video Recorder In Droid Through An Implicit Intent?

Aug 26, 2010

Is it possible to call the built-in Video Recorder in Android through an implicit Intent? I did some search but haven't figured out yet.

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Android :: Set Intent Of Menu Items Defined In Android Menu Xml File?

Mar 26, 2010

How do I set the intent of menu items defined in an Android menu xml file? For example I currently have...

<menu xmlns:android="" android:name="Main Menu">
<item android:title="@string/resume_game" android:icon="@drawable/resume"></item>
<item android:title="@string/play_golf" android:icon="@drawable/play_golf"></item>
<item android:title="@string/my_rounds" android:icon="@drawable/my_rounds"></item>

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Android :: Intent Call Action

Jan 7, 2010

How to invoke call in android using ntent?...

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Android :: Pre-defined Text Styles

Jun 30, 2010

Where can I see what typeface, size, color, etc. are used for Android's pre-defined text styles? Like the default text style or textAppearanceMedium, for example?

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Android :: Default Value Of Preference Defined In XML

May 4, 2010

How do you get the default value of an Android preference defined in XML?
Context: I don't want to repeat the definition of the default value in both the code and the preferences XML.

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Android :: Instantiating A Layout Defined Via XML At Runtime

Oct 18, 2010

I have a ListView that I want to populate with objects whose layout is defined via XML. Is there a way to instantiate a layout at runtime, editing stuff like the Android layout ID, etc., and then load the new layout into the list?

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Android :: Start A Service Which Is Defined In A Different Package?

Apr 25, 2010

I have two apps, one runs in namespace com.gtosoft.voyager and the other is com.gtosoft.dash. From com.gtosoft.dash I would like to start up the service which is defined in com.gtosoft.voyager...

I think I need an intent, but what arg(s) would I pass to the intent before kicking it off with startService()?

If they were in the same package I could just use


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Android :: Receive A SMS From Defined Number In An Invisible Way?

Sep 24, 2010

In my android application that is now working fine, I am sending custom SMS from a user to other one.

Once I detect the SMS come from my application, I do my stuff with the message and everything work fine.

But now, I do not want the SMS application to detect this message as it is totally useless for the user.

So what I would like to do:
As soon I receive it, I get the text and avoid the system to get it ( or at least stop the notification for this message)

Any Idea on how to do? code....

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Android :: Intent Action - Correct Way To Get Back To Application After Call?

Aug 27, 2010

I got one question regarding the intent action "ACTION_CALL". What is the correct way of getting back to the own application/activity after the user ends the call? The only way that came to my mind uses a PhoneStateListener in a background services that waits for the CALL_STATE_IDLE event starting up the application again. But I am not quite sure if that is the correct/intended way of using the intent.

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Android :: Intent Set Action Activity's / Get Free Online Tutorial?

Nov 12, 2010

Can any one suggest some helpful links so that I can get free online tutorial?

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Android :: Defined Color Under Res / Values Not Usable In Code

Jul 15, 2010

I defined a white color in mycolors.xml under res/values as below:

<?xml version="1.0" encoding="utf-8"?>
<color name="my_white">#ffffffff</color>

In my code, I set the text color of a TextView as the white color I defined:

TextView myText = (TextView) findViewById(;

But the text in the TextView turned out to be a black color. When I use @color/my_white in layout xml files, it works fine. I check the generate, and see: public static final int my_white=0x7f070025;

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Android :: Creating Multiple Objects Of View Defined In Xml

Jun 9, 2010

I have to dynamically add a list of views (the views use RelativeLayout). Can I do this by specifying the view definition in xml and instantiate multiple objects off it? This gives the usual benefits of separating the view part from the code (for e.g., making it easy for the UI guys to alter things) or Is going the ArrayAdapter the suggested/only route?

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Android :: Not Able To Use New Resource Identifiers With TargetSdkVersion Defined In Manifest?

Jul 9, 2010

I'm developing an Android application that I'd like to be compatible with 1.5 (SDK version 4).

I'm testing the application on 2.2 (SDK version 8).

To do this, I'm including in the manifest file the line <uses-sdk android:minSdkVersion="4" android:targetSdkVersion="8" />

I thought this would allow me to use the newest manifest elements and APIs, but I'm getting a compile error whenever I try to use them. For example, I try to define the element installLocation to allow the app to be installed on the SD card, but Eclipse gives me the error

No resource identifier found for attribute 'installLocation' in package 'android'

Is there something else I have to do to get this to work? If I can't get this to work, what benefit is defining targetSdkVersion?

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Android :: Selector Resource Use A Color Defined In A Style?

Sep 21, 2010

I'm trying to use a color defined in a stlyle in a selector but it is causing a Resources$NotFoundException.

First I added a new attribute to attr.xml:


Then I defined that attr value in styles.xml:


Then I tried to use that attr in my selector definition:


Lastly, the activity uses the ThemeNoTitleBar style theme in the manifest.

I've also tried creating a color in colors.xml and having it use the new attr but that also fails.

I'm obviously missing something but am not sure what to do to fix it. My intent is to create multiple themes and have the selector use the color in the currently selected theme.

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Android :: How To Calculate Angle Between Line Defined By Two Points

Apr 20, 2010

I'm currently developing a simple 2D game for Android. I have a stationary object that's situated in the center of the screen and I'm trying to get that object to rotate and point to the area on the screen that the user touches. I have the constant coordinates that represent the center of the screen and I can get the coordinates of the point that the user taps on. I'm using the formula outlined in this forum: How to get angle between two points?

-It says as follows "If you want the the angle between the line defined by these two points and the horizontal axis:
double angle = atan2(y2 - y1, x2 - x1) * 180 / PI;".
-I implemented this, but I think the fact the I'm working in screen coordinates is causing a miscalculation, since the Y-coordinate is reversed. I'm not sure if this is the right way to go about it, any other thoughts or suggestions are appreciated.

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Android :: Get Droid ListPreference Defined In Xml Whose Values Are Integers?

Apr 24, 2010

Is it possible to define a ListPreference in Xml and retrieve the value from SharedPreferences using getInt? Here is my Xml code...

And I want to get the value with something like: int val = sharedPrefs.getInt(key, defaultValue).

At the moment I have to use getString and parse the result.

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General :: Flash Rom Tool For Android Devices Is Not Defined?

Feb 14, 2013

UMTS 2100 MHz


In Vietnam there is Q-Smart S20 but still no flash tool to backup rom You do have the tools to flash rom for your child is not in urgent need to reverse the bit Q-Smart S20 uses Qualcomm S4 chip MSM8225 Adreno 203

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