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• How to implement a "hidden" Android app?

  - by mawg

  I would like an application which is not readily apparent to casual perusal of the Android. How best to activate it and bring its screen to the fore? Can I detect a special dialing sequence, like *1234#? Or a hotkey combination? When activated, I guess I can pop up an anonymous screen which does not mention the app, but only asks for a password. If password is ok, then show the app. Any suggestions?

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• Android : How to Remove all capital letters from image filenames before importing into Eclipse

  - by Hubert

  As you know, you can't have capital letters in your image filenames that you use in your Android project (Ressource/Drawables folder). I've got hundreds of small images (GOOG.GIF as an exemple) that I need to import into my project (I usually do a simple drag and drop from a desktop folder into Eclipse). So here's the question : How do I quickly change all the filenames (replace all capital letters to lower case) before importing into my project ? So, GOOG.GIF becomes goog.gif AAPL.GIF becomes aapl.gif etc. Any quick command line solution or another tool to do just that ? Thanks.

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• Building FFmpeg for Android

  - by varevarao

  I've spent almost a week on this now, trying to get FFmpeg "Angel" to build for Android. I've tried build scripts from all over the internet to no avail. I got closest was using this. A sthe author himself says the script doesn't work for newer versions of FFmpeg due to this bug, which has been dismissed on that ticket saying "I found a Makefile that does it." This was dis-heartening, being the only post on all of the cast Google world that was anywhere close to my problem. So, question time: Is there a way to get around the above bug? I'm trying to use the newest ffmpeg API, and "Love" is just giving me "undefined reference" errors while trying to use av_encode_video2(), and av_free_frame(). The code I was working on the lines of is at the ffmpeg git repo, under /doc/examples/decoding_encoding.c (the function starting on line 338)

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• Android: Custom Clock widget Service work-around?

  - by Anthony Forloney

  I was interested in developing a clock widget for the homescreen and upon reading Home Screen Widgets tutorial, is there a pre-existing Service I could reference for updating the current time rather than re-inventing the wheel? I have currently Retro Clock on my android phone and noticed that when I click it, it pops up the Alarm Clock settings, but with the default Google Analog Clock widget, upon click does nothing. Is that because the Retro Clock widget implements the Alarm Clock service? If so, how can I go about referencing that service? Or do I have this all wrong and misunderstood? Any help is appreciated. EDIT: I believe implementing the service to update the clock would drain the battery life tremendously, any ideas on a work around or help shed some light on any performance issues with using Service?

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• Android 2.1 address bar causes change in viewport dimensions

  - by davehumyo

  Hi, I have a page that has a 100% width and height div in it (all surrounding elements are sized accordingly so that it does actually achieve 100% width and height). Below that div I have a second div with a fixed height. In mobile safari and blackberry everything is fine, when the page loads the dimensions are applied correctly (the top div filling the viewport) and the user can scroll down to reveal the second div. Android 2.1 also applies the dimensions correctly, but with an added quirk; when the user scrolls down and removes the address bar from the page, the dimensions of the div are recalculated to fill the viewport, causing the content to jump. Ideally I would like the dimensions of the div to remain static when the page is scrolled, but remain 100% so that it will fill the viewport regardless of device size or orientation. Does anyone know of any way to disable this recalculation? Thanks for any help you can provide.

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• Audio Playback Rate in Android

  - by Marquis

  So, I know that this has been done with a few Android apps before, but I cannot for the life of me figure out how, since it's not currently possible through the API. How does one adjust the playback rate of a sound played through MediaPlayer; either with or without adjusting the pitch is fine for now, though the latter is definitely preferred. If someone can point me in the direction of an open source app that I can use as guidance, that would also be fine. Thanks in advance.

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• Excel-like vertical and horizontal headers for android

  - by heru

  Hi all, I need to have excel-like headers. It means, that it has vertical headers (fixed horizontally), which can be scrolled vertically, and horizontal headers (fixed vertically), which can be scrolled horizontally. The contents should be scrollable both vertically and horizontally. To make it clear, I tried to 'draw' here. hor_header1 | hor_header2 | hor_header3 | ....... ver_header1 | content1_1 | content1_2 | content1_3 | ........... ver_header2 | content2_1 | content2_2 | content2_3 | ........ ver_header3 | content3_1 | content3_2 | content3_3 | ........... ....... | ........... | .......... | ........... So ver_header1,2,3 should be sticky when I scroll horizontally, and hor_header1,2,3 should be sticky when I scroll vertically How could I achieve this? Is it possible in android??? Thanks before. Heru

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• android: how to create multiply views screen?

  - by avi cohen

  hello, i'm beginner at android development. i want to create an activity, which shows a question with 4 answers, and at the bottom of the screen i want to place a timer. i have already found timer example, and i created a question with the answers. the problem that they are 2 different projects and activities, and i am looking for the best way to implement it. i think i can't show 2 activities on one screen, but i can show 2 views or shell i use the ViewGroup, or maybe to copy-paste one of the activities code to another ( its the easiest way but probably the most ugliest way to implement it). please tell me what is the best way, that i will study and not to waste time to study all the ways and only then to choose one of them. thanks!

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• Android-Close Other Apps

  - by Luke

  I have some code that will launch a different application using intents but what can I do to close or kill the other app? Here is the launch code (works great): Intent i = new Intent(); i.setAction(Intent.ACTION_MAIN); i.addCategory(Intent.CATEGORY_LAUNCHER); i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); i.setComponent( new ComponentName(resolveInfo.activityInfo.applicationInfo.packageName, resolveInfo.activityInfo.name)); I tried to kill the background processes but no luck: ActivityManager activityManager = (ActivityManager) context.getSystemService(context.ACTIVITY_SERVICE); activityManager.killBackgroundProcesses("com.pandora.android"); I also tried this to kill it: context.stopService(new Intent(context, Class.forName("com.bla.bla")));

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• Android: i need password example

  - by user1475122

  I have long been looking for a functioning example of a password, but I have not found. can someone help me? Explained more clearly: I have a TextField named password and I want that when it is written in 123 and press the button it goes to another activity if it is written in 123 if not it would inform the "wrong password!" and that the password is found file, which is / sdcard / Android / password.txt if you understood :) SORRY FOR MY BAD ENGLISH! I'm Finnish, and a young coder :) ( I hope someone may be understood :D )

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• Getting error in integrating Contacts APIs in Android 1.6 and 2.0

  - by dhaiwat

  Hi All, I have seen the BusinessCard example provide in Android examples. I am using ContactAccessor abstract class to seperate out the SDK versions. My code is running fine for 2.0 onwards, but when I am trying to build the code in Adnroid 1.6 I am getting the following errors: Build.VERSION_CODES.ECLAIR is not resolved. Getting errors in the whole class in which I have used Contacts APIs from 2.0 (say in class ContactAccessorSdk5.java). How to resolve these issues? I want to run my App on both the versions. Please help me. Regards, Dhaiwat Bhavsar.

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• Best approach to send data from a server to an Android device

  - by ElectricDialect

  I am developing an Android app that needs to communicate bi-directionally with a server. By that, I mean either the server or the device can send a message at any time, with an arbitrary amount of time in between messages. Sending data from the device to the server is a common and I think well understood task, but I'm not as sure what the best approach is to go in the opposite direction from the server to the device. I think having the device periodically poll the server may be a bad idea due to latency and the drain on the battery, but I'd be willing to consider this option. My plan at the moment is to send text messages from the server via an email-to-SMS bridge, and to have my app run a service to receive and handle these messages. The question I have is if there are any best practices for this scenario, and if using text messages has some downsides that I have failed to consider. For the sake of this question, I want to assume that users have an unlimited text data plan, so paying per text won't be an issue.

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• performing a Http request on android

  - by rantravee

  Hi, Could someone provide the basic code to use if I want to perform a http request on android to the address "address" with the string "message" ? Also I'd like to check the server response and perform some actions if the right conditions meet , but I ' m unsure of how and when the server send back the response . My guess is that the response is gotten in a blocking function, or in an asynchronous function . Could you provide code or information on this as well ? Great thanks from a novice with too much on his head !

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• Android: Constructing a triangle based on Geographical information

  - by Aidan

  Hi Guys, I'm constructing a geolocation based application and I'm trying to figure out a way to make my application realise when a user is facing the direction of the given location (a particular long / lat co-ord). I've got the math figured, I just have the triangle to construct. Here's a further clarification of what I want to do.. I just want to know is there a way to get java to construct 2 other co-ordinates based on my orientation in relation to true north and my current co-ordinate? I'd like to construct a tri-angle, 45 degrees out each way of my current location (one of the points) and 1 kilometer in that direction. The problem is I don't know how to make Android/Java recognise that I want to find that point in the direction I'm currently facing.. Anyone got any ideas?

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• MapView tiles loading in Android

  - by Pich

  In the Maps application (at least version 5) for Android the tiles are loading in a different way, than when using a MapView in my own application, when for example zooming in or out. In the MapView displays a gray checkered image until the tile is fully loaded an than the map is displayed. In Maps application this it not the case all the time. Tiles that are not fully loaded are still showing a map but it is blurry. The Maps application way of showing the map when zooming is much prettier for the eye. Is it possible to have this "feature" in a MapView in my own application as well? Best regards P

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• Push notification does not happening when app is not running - android

  - by iShare

  I am using Urban Airship for Push notification. Its works like a charm but just found that its did not sending push notification when application is not running. How to handle this? I am sure its a common scenario and there will be a solution. I checked many posts in stack overflow but most of them are for iOS. I want for Android AirshipConfigOptions options = AirshipConfigOptions.loadDefaultOptions(this); UAirship.takeOff(this, options); Logger.logLevel = Log.VERBOSE; PushManager.shared().setIntentReceiver(IntentReceiver.class); PushManager.enablePush();

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• Get the affinity of a SQLite column on Android

  - by Neil Traft

  The SQLite C library has a method, sqlite3_column_decltype(). But I cannot find any place where the Android SQLite API makes this method available. Is there any way to get the declared type of a column without running any SQL (i.e. can I avoid using PRAGMA table_info)? I could have used AbstractWindowedCursor.isBlob(), but it says that it will also return true if the field is NULL. I need something that will guarantee me a value equal to the column's declared type.

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• Ideal way to set global uncaught exception Handler in Android

  - by Samuh

  I want to set a global uncaught exception handler for all the threads in my Android application. So, in my Application subclass I set an implementation of Thread.UncaughtExceptionHandler as default handler for uncaught exceptions. Thread.setDefaultUncaughtExceptionHandler( new DefaultExceptionHandler(this)); In my implementation, I am trying to display an AlertDialog displaying appropriate exception message. However, this doesn't seem to work. Whenever, an exception is thrown for any thread which goes un-handled, I get the stock, OS-default dialog (Sorry!-Application-has-stopped-unexpectedly dialog). What is the correct and ideal way to set a default handler for uncaught exceptions? Thanks.

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• Android 4.0.3 OpengL ES 2.0 issue

  - by user1662184

  i develop live wallpapers using Opengl ES 2.0 engine. My wallapapers run smooth on 2.x Android Devices , but in 4.03 i see some strange things. 1st seconds (maybe a minute max) lwp runs smooth , but after that starts dropping frames especially when objects passing near camera allmost crashes. But no error on eclipse Log. I watched Eclipse log from the begining of loading the lwp to the point of dropping frames. I ve seen that on My LG optimus 2X , and my Samsung Galaxy S2. Any Idea what to check , or what is going on?? UPDATE i just noticed that changing render mode from dirty to continuously fixed the problem , but until screen orientation changes , or goes of and on. after that renderer freaks out.

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• Is there any Android XML documentation?

  - by Eddified

  Is there any sort of xml reference? I found this which turned out to be invaluable for me http://groups.google.com/group/android-developers/msg/d334017d72909c79 but I can't figure out how I was supposed to know how to do that, had I not found that post. I know that the api reference has xml attributes listed for many of the classes... but what about xml tags? Where is it documented that I could build a shape using , , tags? I'd really like to know where I can find such documentation.

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• Developing App To Stream Media to UPnP devices :Android

  - by Rakesh Gondaliya

  Hi, I am making an application which Streams media from the Internet,it can be from any source like Youtube,or any url. I am able to stream media from my android device. Now i want to extend it to be streamed to UPnP devices in my network. Any help on how i can find the list of UPnP devices in my network, then share media with that devices.. I found the little help from http://teleal.org/projects/cling/core/manual/cling-core-manual.html They have their own API for using UPnP service. Any body who have worked on UPnP service can help me. Any help will be much appreciated. Thank you

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• Toast on top of ListView in Android?

  - by sunil

  Hi, I have a listview in my Android Application. Now, when the user presses Next Button other contents will be loaded into the listview. What I want is that if there are no more contents available then there should be a toast displayed indicating that there are no more data available. Say, for example I have a total of 55 data available and I am displaying only 30 of them in one listview. So, when the user presses Next for the first time next 25 records will be visible. If the user again presses the Next button then a toast should be displayed on top of the last listview that had last 25 records. Currently I get an error as IndexOutOfBoundException : Invalid location 15 size is 1. Can someone suggest how is it possible? Regards Sunil

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• Playing BG Music Across Activities in Android

  - by scarface

  Hello! First time to ask a question here at stackoverflow. Exciting! Haha. We're developing an Android game and we play some background music for our intro (we have an Intro Activity) but we want it to continue playing to the next Activity, and perhaps be able to stop or play the music again from anywhere within the application. What we're doing at the moment is play the bgm using MediaPlayer at our Intro Activity. However, we stop the music as soon as the user leaves that Activity. Do we have to use something like Services for this? Or is MediaPlayer/SoundPool enough? If anyone knows the answer, we'd gladly appreciate your sharing it with us. Thanks!

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• android steganography

  - by poo123

  Im doing steganography on android...my code is as below.. public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.src); picw = mBitmap.getWidth(); pich = mBitmap.getHeight(); pix= new int[picw * pich]; mBitmap.getPixels(pix, 0, picw, 0, 0, picw, pich); try { FileOutputStream fos = super.openFileOutput("dest.png", MODE_WORLD_READABLE); mBitmap.compress(CompressFormat.PNG, 100, fos); fos.flush(); fos.close(); }catch (Exception e) { tv.setText(e.getMessage()); } but whenever i save source image with Bitmap.compress() method pix[0] value before and after compression changed..so i'm unable to extract original data...please help me

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• alertDialog.getButton() method gives null pointer exception android

  - by Are

  Hi, Iam planing to give create 3 buttons with layout_weight=1, not interested in custom dialog.So I have written below code.It is not working.Always yes button gives me null. Whats wrong in this code? AlertDialog dialog= new AlertDialog.Builder(this).create(); dialog.setIcon(R.drawable.alert_icon); dialog.setTitle("title"); dialog.setMessage("Message"); dialog.setButton(AlertDialog.BUTTON_POSITIVE,"Yes", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface arg0, int arg1) { } }); Button yesButton = dialog.getButton(AlertDialog.BUTTON_POSITIVE); Log.w("Button",""+yesButton);//here getting null LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT, 1f); yesButton.setLayoutParams(layoutParams); dialog.show(); Regards, Android developer.

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