Android :: Some Coding Errors From A Novice

Nov 16, 2010

I'm a beginner android developer, and I've only been coding for a few months. I'm testing some layouts in a project using eclipse, and I'm following the guidelines from a textbook (beginning android 2.0) and I'm getting some rather perplexing errors. The first error is in my main.xml. my code is as follows:

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/ android" android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="horizontal"

Android :: Some coding errors from a novice


Android :: Designing In XML Vs Coding UI / Which Is Better?

Sep 2, 2010

I have a small doubt, Which is the best way to design UI for Android Coding or Desinging in XML? Which is better in performance?

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Android :: Coding Translate Animation?

Jul 19, 2010

I m really very fed up coding translate animation. actually my image is moving from one position to another but it is coming back to its actual position. can any body here provide me the code to move image from one position to another position without coming back.

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Android :: Audio Stream Trans Coding?

Jan 11, 2010

Let me first state that I do not know Java. I'm a .NET developer with solid C# skills, but I'm actually attempting to learn Java and the Android SDK at the same time (I know it's probably not ideal, but oh well, I'm adventurous :)) That said, my end goal is to write a streaming media player for Android that can accept Windows Media streams. I'm okay with restricting myself to Android 2.0 and greater if I need to. My current device is a Motorola Droid running Android 2.0.1. There is one online radio service I listen to religiously on my PC that only offers Windows Media streaming, and I'd like to transcode the stream so my Android device can play it.

Is such a thing possible? If so, would it be feasible (i.e., would it be too CPU intensive and kill the battery)? Should I be looking into doing this with the NDK in native code instead of Java? I'm not opposed to writing some sort of service in between that runs on a desktop computer (even in C#), but ideally I'd like to explore purely device-based options first. Where should I start?

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Android :: Set Image's Margin Top Using Coding Not Xml In Phone

Sep 6, 2010

I am using android:layout_marginTop="100dip" in my imageview,i want to set margin top to each image depending its height using coding not using xml,how can i set image's margintop?

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Android :: Chaning Coding Style Due To GC Performance?

Apr 7, 2010

I keep hearing that Android applications should try to limit the number of objects created in order to reduce the workload on the garbage collector. It makes sense that you may not want to created massive numbers of objects to track on a limited memory footprint, for example on a traditional server application created 100,000 objects within a few seconds would not be unheard of.

The problem is how far should I take this? I've seen tons of examples of Android applications relying on static state in order supposedly "speed things up". Does increasing the number of instances that need to be garbage collected from dozens to hundreds really make that big of a difference? I can imagine changing my coding style to now created hundreds of thousands of objects like you might have on a full-blown Java-EE server but relying on a bunch of static state to (supposedly) reduce the number of objects to be garbage collected seems odd.

How much is it really necessary to change your coding style in order to create performance Android apps?

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Android :: How To Set Image View Property In Coding

Sep 6, 2010

<ImageView android:id="@+id/ImageView01"
android:layout_gravity="center_horizontal"
android:layout_marginTop="30dip"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:scaleType="fitCenter"
android:adjustViewBounds="true">

I want to set this property in coding for image view not use this,how can i make it?

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Android : How To Add Coding For Displaying Address When A Particular Set Of Latitude

Apr 28, 2010

This is a recent install of the Android SDK. I just bought a Mac so even though I've previously done all my testing on a PC (and everything works fine there), I had to set up my mac for development. Installed latest version of Android SDK Installed Eclipse Helios and Android ADT. Now I really don't think this is a Helios or ADT issue since I can do all this without starting Eclipse at all using command line to start Emulator and using geo fix commands, and I get the same problem.

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Android :: OpenGL Coding - Emulator Doesn't Work

May 26, 2009

After spending the better half of this day getting my HTC Magic to work in developer mode, I've now found that some of my frist openGL coding attempts that appeared to work fine in the emulator doesn't work as expected on the device. I've narrowed this down to glColorf(r, g, b, a) not working as expected on the device itself. The provided OpenGL samples do work though. So for example, after modifying Cube.java from the samples to the below code I find that I get the expected grey square on the emulator but a blank white screen (background fill colour) on the device.

class Cube { public Cube() { int one = 0x10000; int vertices[] = { -one, -one, -one, one, one, -one, one, one, };
// Buffers to be passed to gl*Pointer() functions // must be direct, i.e., they must be placed on the // native heap where the garbage collector cannot // move them. // // Buffers with multi-byte datatypes (e.g., short, int, float) // must have their byte order set to native order
ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length*4); vbb.order(ByteOrder.nativeOrder()); mVertexBuffer = vbb.asIntBuffer(); mVertexBuffer.put(vertices); mVertexBuffer.position(0); }
public void draw(GL10 gl) { gl.glFrontFace(GL10.GL_CW); gl.glVertexPointer(2, gl.GL_FIXED, 0, mVertexBuffer); gl.glColor4f(0.5f, 0.5f, 0.5f, 0.5f); gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, 4); }
private IntBuffer mVertexBuffer;

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Android :: Tips For Saving Memory When Coding Under Phone?

Sep 6, 2010

I'm currently developing a software under android and im getting quite quickly some OutOfMemoryException.... I did modified some part of my code to use more static variables instead of making new allocation with the "new" operator but is there any things else to do ? or any other tips ? Any advices would be welcome.

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Android :: JAVA Coding Standards For Phone Platform

Jul 17, 2009

I wanted to check whether there is any JAVA Coding standards in Android platform for performance improvements.

For Example, like an Effective Java code in J2EE environment is to defined the number of elements in the ArrayList constructor rather leaving it blank (new ArrayList(noOfRows)) etc. I definetly suspect these performance tuning tips should be available because of the memory and resource constraints.

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Android :: Clear Sd Card Memory Via Droid Coding?

Aug 25, 2010

I want to clear sd card memory via android coding.

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Android :: Hard-coding Button's Width In Dimension Units

Aug 1, 2010

I've got the hard-coded layout, consisting of buttons, and need to enlarge some of them. I found Button's method setWidth(int value), accepting width in pixels, but I need to set value in dp. So, how can I set dp value in program code?

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Android :: Doing Coding In Linux Through A Virtual Machine On Windows VS Partitioning

Mar 29, 2010

I already have experience with setting up virtual machines, running them and other minor tasks. Im a gamer, so I wont get rid of windows (for now at least...) but I do want to be a great programmer and to be involved with the Open-Source community Id like to know if its a good idea to do my programming in linux through a virtual machine, vs giving it a partitioned section of the HDD. Id like to know about performance pros and cons and functionality.The type of programming I intend to dive into : Android Dev, Web Dev, Desktop Dev...More Android and Web right now though. I do web designing as well, so dreamweaver is added as an "essential". But im sure I can do dreamweaver files and upload them to the server after programming in Linux...Right? And any info on IDE's in Linux for the above mentioned are appreciated, but i would prefer going the coding route and understanding the essence of whats happening "under the covers".

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Android :: Eclipse Debug Issues While Coding Phone Applications

Sep 27, 2010

I have an application I am writing for Android that basically does a screen scrape of a large table on the web and presents it in a nicer way on the handset. Its 500k of html and takes about 20 seconds or so normally.

When I have my phone hooked up to the computer, I used to be able to just click on "Run" and my code would execute similiarly speedy, as opposed to Debug where it would take 10 minutes to complete.

Now, however, clicking "run" behaves just like debug mode.... I don't want this overhead, how do I get eclipse to stop sending my app to the debugger already? I have searched online and found a couple people with the same issue, but simply rebooting my phone doesn't fix it, and there have been no other solutions posted that I have found.

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Android :: Connect And Retrieve Data From One Webserver Through Coding In Droid App?

Jul 22, 2009

How to connect and retrieve data from one webserver through coding in android application?

How to achieve this ? Give me sample code for this

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Text Color And Size Coding?

Oct 23, 2012

how to change the color text in my app. Default is white, not so good with a white background.

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General :: How To Use H/W Accelerated Video Decoding In Coding

Jul 7, 2012

Ways to implement H/W acceleration for video decoding(eg. H.264) in my own app for a long time, but got no clue.

I want to call H/W decoding based on NAL or frame level over raw bitstream, rather than setting up a media player for files.

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Android :: RTSP Coding / Surefire Way To Make Rtsp Work?

Apr 24, 2010

I have Googled my butt off trying to find where if there is a surefire way to make rtsp work. I have a radio station that I listen to that streams via rtsp. Of course by default Android doesn't want to play it. If I pop the URL into yourmuze.fm and create a station there it lets me stream it to my phone. After checking how it works I come to find that it streams to the phone via rtsp! So obviously there is something amiss. What makes one stream work and one not? This is the stream I am attempting : rtsp://wms2.christiannetcast.com/yes-fm

It is an audio stream so I would be thrilled with most peoples problem of "it only does audio and not video." When yourmuze.fm streams, DDMS states it brings up MovieView to play the audio if that helps at all.

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Android :: Errors When Use The Aidl

Jun 17, 2009

I create an aidl file named mp3PlayerInterface.aidl. Then I try to use the aidl tool to parsing the aidl-file to java-file. The error"mp3PlayerInterface should be declared in a file called com mp3playermp3PlayerI nterface.aidl."happened no matter use the aidl-command derectly or eclipse.

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Android :: Errors In Layout

Sep 25, 2010

I have created four tabs with listview in each. I have been attempting to make the list views clickable, I have used the listview tutorial from Here to create the list view using string.xml and R.array:

The problem is when I use my intent and onItemClickListener I get multiple marker errors, if I play around with the commas brackets and class body markers the errors move around, so is it the syntax that's the problem or is it the lay out or postion of the code;

CODE:............

I get these errors here:

CODE:..............

If I add to complete class body I get more erros here and in other places.

I get these errors here:

CODE:....................

Same problem here I have tried different combinations and it gives me errors constantly with this setup I have the least amount of errors.

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Android :: OOM Errors During Inflation

Mar 31, 2009

All of sudden I am seeing oddball OMM errors when inflating view trees.

The allocations are from really small (couple of K) to fairly large (couple of hundered K).

But ddms says the heap is only half full and there's around 2MB available. The app does not appear to be leaking.

What should I be checking?

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Android :: ANR Errors With KeyDispatchingTimedOut

Oct 13, 2010

Here is my code:

CODE:.............

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Android :: Facebbok App Errors

Nov 18, 2009

Is Anyone else getting errors on the facebook app, when you check your notifications, click on the comment that someone left you and it always gives you an error, when it tries to load the page?

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Android :: Errors On Calling Web Services

Aug 8, 2009

When i am calling the web services i got his errors. i added the internet permissions in android manifest.xml file 08-08 15:40:09.127: INFO/aSizzle(198): statusCode>>>500 08-08 15:40:09.158: INFO/aSizzle(198): statusLine>>>HTTP/1.1 500 Internal Server Error

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Android :: Unable To Unlink Errors

Dec 22, 2009

I'm getting some errors I can't seem to get rid of. The application I'm working on installs alright but when it's started it stops the loading process telling me an error has occurred. Upon looking at the log there are ten apparent issues all revolving around the graphic files for the application.

DEBUG/(1724): unable to unlink '/data/data/com.blah.blah/files/ special_button.png': No such file or directory (errno=2)

That error happens 10 times..one for every image in the raw folder. The Manifest has multiple intents and activitys and is structured like this

<application>

<activity>

<intent-filter> </intent-filter> <intent-filter> </intent-filter> <intent-filter> </intent-filter>

</activity>

<activity>

<intent-filter> </intent-filter>

</activity> <provider> </application>

It's the second activity that seems to be having the problem. The first activity is .MainActivity and the second one is .ThemeProvider and .Screen java files. Everything in the first activity runs perfectly only the second one has issues. I have tried everything I can think of to get rid of these errors so the images will load and stop causing the error and termination of that part of the application. Any help would be greatly appreciated as I've been stuck for a few weeks on this.

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Android :: SDK Plugin 0.9.4 - Getting Random Errors

Nov 1, 2009

I recently upgraded from 0.9.2 (I think) to 0.9.4 of the SDK plugin using Eclipse's 'Check for updates' and for a while everything seemed ok. Now I'm getting random errors and odd behavior everywhere:

- if I try and run or debug a previously working app in the Emulator from Eclipse, I get 'Could not find ...apk' errors.
- when the app does start in the emulator, in debug mode the app just stays in the Emulator with the 'Waiting for debugger' message and the debugger never attaches
- a previously running app that had a dependency to another source project in Eclipse now builds ok, but is giving ClassNotFound exceptions at runtime in the emulator when running.

In general it seems the SDK and the Emulator are in a messed up state. Is there an easy way to remove the SDK from Eclipse and reinstall? Is it as simple as removing files from Eclipse's plugins dir?

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Android :: Google Goggles Errors - Won't Run

Jul 15, 2010

I keep getting an error when attempting to run Google Goggles. It loaded fine, but when I try to run it, I keep getting the same error: SORRY! The application Goggles (process com.google.android.apps.unveil) has stopped unexpectantly. Please try again. and it asks me to Force close. I do. I have even rebooted my phone a couple times and looked for updates. no luck. Should I uninstall and reload? How do I uninstall?

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Android :: Catching Out Of Memory Errors

Aug 22, 2009

I am getting an outofmemory error (java.lang.outofmememoryerror) from a bitmapfactory that doesn't seem to be caught despite the fact that it is in a try{ }catch block. Can I catch this error somehow or is it outofmemory inherently uncatchable?

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Android :: OnClick Button Errors ?

Oct 6, 2010

I have been teaching my self to "code" in the android language and java over the past few day. So I am new to this so please be patient.

Basically, my problem is I am trying to get a button on my form to open a web page.

Here is my java file.

Code:

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