Android :: Returning From HTTP Intent.ACTION_VIEW
Mar 23, 2009
I have an application that needs to have a user visit a web page to authorize it. After spending time in the Browser the user should return the my application.
Currently, I'm launching the Browser with:
CODE:................
After using the browser, I can go back home and launch my application, which stacks a new Activity on top of the previous stack of Activities that were being used in the application. For example. If the user launches the app, they have Activity A in the stack. From there we navigate to Activity B which then launches the Browser. Then, the next time we enter the app, we launch Activity A, which is pushed onto the stack that already contains an A and B.
My question is then, how can I just go back to the previous stack? Basically, do I have to create a new Activity? Is there a better way to launch the Browser, and then come back to my application?
Also, I've been using the Intent.FLAG_ACTIVITY_NEW_TASK when I start the Browser activity so that my app stays running.
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Aug 5, 2009
I have an image file on my sdcard and the path to the file is: /sdcard/apps/MyPath/1249487966270.png
When a user clicks a button on my application I want to display this image to the user. Inside of the click listener I'm using the following code:
CODE:........
The button click event happens, the activity is started and then it is ignored. Nothing appears!
Watching the log through DDMS I see the following entries:
CODE:...........
What am I doing wrong? Why am I getting "Window already focused"? I want to use the default activity for viewing the image (the camera's ViewImage class). But this is not working.
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Jul 15, 2010
I execute the following code:
CODE:....................
Which opens the image viewer activity but I don't want to see the navigation arrows as well as the items in the menu. I only want the zoom controls. Is it possible to have it like that ?
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May 6, 2009
I've been researching how to best implement a service which performs a network transaction and returns data to the caller.
Clearly, this needs to happen on its own thread which means some form of async response. I can see at least three ways of doing this--some more complex than others. In the descriptions below, C is the caller, S is the service.
1) C wraps a Handler in a Messenger object, adds this to an Intent. C then calls startService with this intent. S extends IntentService which runs the Intents received in a worker thread. S then sends a message to C via the Messenger. This has the benefit of not requiring any of the async binding process or making an IDL interface that needs to be compiled into C. This seems to be the closes to a Handler-based response mechanism of Local Services.
2) C binds to S and then uses AsyncTask<> to make a blocking call to S. S performs the network transaction and returns the data in the return value or an out parameter. This requires the async binding process, but does not require a callback function since the inter- thread communications is handled by AsyncTask<> and the worker thread is in C's context.
3) Make the function called in S be completely asynchronous. S defines two interfaces: IMyService and IMyServiceCallback. S implements IMyService.Stub. C implements IMyServiceCallback.Stub. C binds to S then calls S via IMyService, passing its IMyServiceCallback binder. S spins up a worker thread and returns immediately. S then calls the callback when it has completed the network transaction.
I am asking for advice on which methods are most appropriate. I do not need the the service running constantly, only when the web transaction is required. C does not use S all the time--definitely don't want to bind during C's onCreate. However, I would like the time from when C determines it needs to use S to getting the results back to be as quick as possible (i.e. adding minimal latency to the already latent network access).
Is there any preference to having the worker thread in C or in S? Are there any significant problems with option 1?
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Mar 24, 2010
I am using a DefaultHttpClient and a ThreadSafeClientConnManager to share the httpClient across threads. That part is working well. However, when I execute an HttpPost in one thread, and call httpPost.abort() from another. It does not return immediately and continues blocking until the socket timeout is reached in most cases. Am I missing something else? I've tried using: connectionManager.closeIdleConnections(30, TimeUnit.SECONDS); connectionManager.closeExpiredConnections();
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Jun 16, 2010
In my application, I am trying to pass a serializable object through an intent to another activity. The intent is not entirely created by me, it is created and passed through a search suggestion.
In the content provider for the search suggestion, the object is created and placed in the SUGGEST_COLUMN_INTENT_EXTRA_DATA column of the MatrixCursor. However, when in the receiving activity I call getIntent().getSerializableExtra(SearchManager.EXTRA_DATA_KEY), the returned object is of type String and I cannot cast it into the original object class.
I tried making a parcelable wrapper for my object that calls out.writeSerializable(...) and use that instead but the same thing happened.
The string that is returned is like a generic Object toString(), i.e. com.foo.yak.MyAwesomeClass@4350058, so I'm assuming that toString() is being called somewhere where I have no control.
Some of my code
CODE:.........
This is in the activity that receives the search suggestion:
CODE:...........................
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Sep 14, 2010
I built an Android application that requires OAuth. All was working well using a custom scheme call back which is intercepted by Android. It seems that Yahoo have changed the goal posts and now the custom scheme is not accepted by Yahoo.I am now looking at possible alternate approaches. My first attempt is to use a normal http scheme and modify my intent filter to intercept the new URL. I have the following in my AndroidManifest.xml :
<intent-filter>
<action android:name="android.intent.action.VIEW"></action>
<category android:name="android.intent.category.DEFAULT"></category>
<category android:name="android.intent.category.BROWSABLE"></category>
<data android:host="www.test.com" android:scheme="http"></data>
</intent-filter>
Where www.test.com will be substituted with a domain that I own. It seems :
* This filter is triggered when I click on a link on a page.
* It is not triggered on the redirect by Yahoo, the browser opens the website at www.test.com
* It is not triggered when I enter the domain name directly in the browser.
So can anybody help me with
* When exactly this intent-filter will be triggered?
* Any changes to the intent-filter or permissions that will widen the filter to apply to redirect requests?
* Any other approaches I could use?
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Sep 22, 2010
I try and open up a new activity, pointing to the market, with the following code:
CODE:......
It works fine on the device, but the Emulator throws an Exception:
CODE:....
I'm not sure if this is just an emulator thing, or whether this could replicate on a real device?
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Nov 13, 2009
I have a folder on sd-card in which I keep photos edited in my application. Im trying to force deafult android image viewer to see all pictured in that folder. Unfortunately I am able to see only one picture. The "next" and "previous" arrows are disabled.
The code i use to see only one picture:
CODE:.....
How to activate the browsing option? how to call the intent so that every picture in that folder would be visible?
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Oct 9, 2009
I would like to run an ACTION_VIEW with memory data.
The first solution is to write data in a file on sdcard but ... it does not seem so efficient. I was thinking to implement my own content provider, but as far as I understand I need to return an ParcelFileDescriptor. I found a MemoryFile implementation in SDK, however I don't know how to get a ParcelFileDescriptor for a MemoryFile.
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Jul 27, 2010
I have an application that sends messages to a specified contact. Right now I use
CODE:..............
To send messages, and it works great on the emulator and on my N1. I got complaints from users with HTC incredible that they get force close from android.mms application when they use it. I did more digging and I see there are many ways for sending messages.
For example
CODE:........
And also
CODE:....................
They all seem to work exactly the same on the emulator and on my device, and I could not find anything official about the correct, generally supported way.
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Jun 2, 2010
I have an app that downloads a pdf from a server and tries to open it with an itent:
Intent intent = new Intent(); intent.setAction(android.content.Intent.ACTION_VIEW); File file = new File(filepath+filename); intent.setDataAndType(Uri.fromFile(file), "application/pdf"); try { startActivity(intent); } catch (ActivityNotFoundException e) {
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Oct 1, 2009
How can I return a value from TabActivity? It seems that the return value from tab pages vanishes and the caller always receives RESULT_CANCELED instead of RESULT_OK.
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May 8, 2009
My application that uses geocoding was working fine till last week and now all of a sudden am not getting proper data from the same.
I used getLocality() , which was returning CITY name previously. But now it is returning NULL.
Is something changed? or Has someone faced the same issue?
My application is on SDK 1.0
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Oct 15, 2010
I am (supposedly) catching NullPointerException and returning 0 if that happens. But occasionally I get NullPointerException failure anyway. Is catching it this way no enough to prevent this failure?
private char getCharBehindCursor (int offset){ // get a single char behind cursor + offsett CharSequence cSeq; InputConnection inputConnection = getCurrentInputConnection(); if (inputConnection != null){ try { cSeq = inputConnection.getTextBeforeCursor (offset + 1, 0); } catch (NullPointerException npe) { /* failure*/ return (char)0; }
if (cSeq.length() == offset+1){ return cSeq.charAt(0); } } return (char)0;
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Sep 2, 2010
Alright, this might be kinda simple, but I cannot figure out how to do this. How can I change this function to return the String class_name? I know that I need to change the function from void to String, but what else do I need to do? Code...
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Apr 16, 2010
I am trying to send all my activities to background by calling this.moveTaskToBack(true); on a menu button click, but the call returns me a boolean value false. Please can anyone let me know if my way to invoke this is wrong or if I am doing anything wrong.
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Oct 5, 2010
The line "return db.insert(DATABASE_TABLE, null, initialValues);" is returning a null pointer and I cant figure out why! I'd be grateful for any help public class Database extends Activity {
@Override public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
DBAdapter db = new DBAdapter(this);
if(db != null){
long id = db.insertUser("test", "test");
Cursor c = db.getUser(id);
Log.d("DB", c.getString(1));
Log.d("DB", c.getString(2)); db.close();.......
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Sep 22, 2010
Looks like reverseGeocode ( getFromLocation()) is not working in android 2.2. It is not able to fetch the address from the coordinates. It returns null and crashing my app.
In general 2.2 is not stable - 2.1 was much better. UI response , UI rotation when rotate the phone etc doesn't work reliably....
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Apr 16, 2009
I do not get any results from the Geocoder in the 1.5 preview release. Any information on this? In the maps application it works but my calls simply return an empty list (no exception, all permissions I know of (in this case only Internet) are set.
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Aug 10, 2010
I have a set of mp3 files on my computer which i want to be the server. Now i have a web service(Songs_Collection). This web service returns the list of all songs present on the server to the user.The user can download the desired file directly from the server.
I have a small problem :
How does my web service get the list of audio files kept on the server in the folder c:Audio Files.
Someone suggested that i need to keep the names in a "Web Content" folder, but can anyone suggest how should i approach it?
I worked out on this part . But now how do I send it to the client on device ?
Can i send it directly as an array? I guess then some seriliazation-deserialization needs to be done. Or If send it as an XML file then how should I proceed? (This is more important)
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Sep 22, 2009
The code snippet below displays a Dialog with a simple login-form. The problem is that when the user hits the login-button, the text that was entered into the EditTexts are not returned on the getText()-call. However, if I set android:setText="foo" on the EditTexts in the xml-layout "foo" is returned on getText(). why the text entered at runtime won't stick?
CODE:..............
and the XML:
CODE:.....................
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Jul 26, 2010
I am using the previewCallback from the camera to try and grab images. Here is the code I am using
private Camera.PreviewCallback mPrevCallback = new Camera.PreviewCallback()
{
public void onPreviewFrame( byte[] data, Camera Cam ) {
Log.d("CombineTestActivity", "Preview started");
Log.d("CombineTestActivity", "Data length = "
+ data.length );
currentprev = BitmapFactory.decodeByteArray( data, 0,
data.length );....................................
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Jun 14, 2010
I have an application that utilizes the phones DeviceID in various ways. I am now getting emails from users who have the HTC Droid Incredible phone that they are getting the error message I have added to the app that is showing the DeviceID being returned is not valid - which means it is either empty/null or the default ID used in the emulator. I require a valid DeviceID to use my app, and the permissions are all set fine in the XML. It works just fine on every other device, and now suddenly it seems to stop working on this phone. Anyone else having this issue? Anyone find out what is causing it? Does HTC now block this ID on this device?
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Apr 20, 2010
I'm a bit new to programming Android App's, however I have come across a problem, I can't find a way to make global variables -unlike other coding like php or VB.NET, are global variables possible? If not can someone find a way (and if possible implement the way into the code I will provide below) to get a value from the variable 'songtoplay' so I can use in another Public Void...
Here is the code:.............
Basically, it gets the value from the Spinner 'hubSpinner' and displays it in a Toast. I then want it to return a value for string variable 'songtoplay' -or find a way to make it global or useable in another Public Void, (Which is will a button, -loading the song to be played)
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Oct 11, 2010
The FileObserver class doesn't appear to be working as advertised.
I created a class extending the FileObserver class. I initialize the class to watch the path of the sdcard as returned from the Android Environment.getExternalStorageDirectory function. Everything seems to work perfectly as long as the files are in the ROOTof the sdcard. Any files within SUB-FOLDERS of the sdcard are NOT returned to my public void onEvent(int event, String path) callback in my FileObserver class.
The docs say files in subfolders should be returned to the onEvent() callback but it's not happening. Note, I've only tested on the Android simulator (v2.2) since I do not yet have access to a device. Maybe this is a bug specific to the simulator?
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Nov 16, 2010
I think this should be easy to answer. I have an application that does some long calculations, and I would like to show a progress dialog while this is done. So far I have found that I could do this with threads/handlers, but didn't work, and then I found out about the AsyncTask.In my application I use maps with markers on it, and I have implemented the onTap function to call a method that I have defined. The method creates a dialog with Yes/No buttons, and I would like to call an AsyncTask if Yes is clicked. My question is how to pass an ArrayList to the AsyncTask (and work with it there), and how to get back a new ArrayList like a result from the AsyncTask?
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Mar 23, 2010
I'm having issues with BitmapFactory.decodeStream(inputStream). When using it without options, it will return an image. But when I use it with options as in .decodeStream(inputStream, null, options) it never returns Bitmaps. What I'm trying to do is to downsample a Bitmap before I actually load it to save memory.
I've read some good guides, but none using .decodeStream.........................
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Jan 28, 2010
I wish to re-use the Contacts application in a way to enable the user to pick a contact and return it to the parent activity (my application's activity).
For achieving this, I want to inquire about the kind of Intent that will be needed to launch the contacts application.
Intent i = new Intent(Intent.ACTION_GET_CONTENT, ?); startActivityForResult(.....);
What should be the second argument here ?
In the deprecated Contacts API, I could use the following snippet, but not sure about ContactsContract:
Intent i= new Intent(Intent.ACTION_GET_CONTENT,People.CONTENT_URI); startActivityForResult(i, reqCode);
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Aug 12, 2010
Edit: Okay, I found a solution. Don't know that it's the proper solution, but it does work correctly. Added to the code below. I'm trying to allow a user to select a number of directories from a checklist, and return them upon clicking a "Submit" button. Here's a snippet of my code. It populates the List View with all the directories on /sd card/, and for the initial selection (of however many I pick) when I submit, the log shows the correct choices returned. However, if I un check an item, and click "Submit" again, it still shows as if all are selected. Do I need to write a handler to un check an item? I thought that was taken care of by the choice Mode selection?
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