Android :: JIT Compiler Explanation

May 3, 2010

Is anyone able to explain to me exactly what the upcoming JIT compiler will provide? For example, I have Java programs that generate bytecode at runtime which I would like to port to android. Will the JIT compiler make this possible by converting the runtime generated Java byte code to Dalvik at runtime as required?

Android :: JIT compiler explanation


Android :: Explanation Of ADT Layout Editor UI?

Apr 13, 2009

Is there an explanation of the ADT layout editor UI some place? I can't find anything on the Android web site about it. When I look at a layout in the design view, there are a number of fields at the top with labels like MCC, MNC, Lang, etc. I've noticed that I can change the contents of these fields, such as orientation, and it has an effect on the view. But a yellow warning triangle appears next to the field I've changed and the next time I open this view I see the unmodified field. For example, if I change to landscape orientation the view goes back to default next time. Is there documentation some place on what these fields mean and how they are supposed to be used?

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Android :: Is FAQ Or General Explanation Of What ROOT Is On Forum?

Jun 13, 2010

Is there a FAQ or general explanation of what ROOT is on the forum?

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Android :: Preferences Use Explanation - Recommended Best Practice?

Oct 6, 2010

Some of my app's preferences could use some more explanation than the scarce space available for the summary. Sadly, there doesn't seem to be support from the system, like an optional help button that shows a longer text. How do you solve this problem? The first thing that comes to mind is an additional custom "preference" like "more information to above entry" that opens an AlertDialog with the help text, but that's not really nice for both user (two entries for the same preference) and the developer (manual work to do in Preference Activity). A bit nicer for the user, but way more work for the developer would be custom dialogs for each preference with more text and/or a help button. Is there a better solution or even an officially recommended best practice?

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Android :: Explanation About Shared Preference In Droid And Its Data?

Aug 26, 2010

I need simple explanation about shared preference in android and preference data

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Android :: Does Compiler Detect Dead Code?

Feb 8, 2009

For example, will this result in any performance gain:
-- public static final boolean DEV_MODE = false;
if(DEV_MODE){ // log stuff, compute debug values etc. }

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Android :: How A JIT Compiler Helps Performance Of Applications?

May 13, 2010

I just read that Android has a 450% performance improvement because it added a JIT compiler, I know what JIT is, but I don't really understand why is it faster than normal compiled code? or what's the difference with the older approach from the Android platform (the Java like run compiled bytecode).

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Android :: How To Explicitly Invoke AIDL Compiler?

Jul 26, 2010

I'm using Eclipse with ADT to develop my project, but for some reason my AIDL files are not getting compiled into Java files. Is there a way to explicitly invoked the conversion of my AIDL files?

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Android :: Controlling Compiler Options In Eclipse

Oct 7, 2009

Is there a way to control the optimization level of the java compiler that Eclipse uses when building a project?Or is this question not relevant anymore, is all optimization deferred to the vm? The results of this tests imples test_f() is not being inlined, even though it really is a prime candidate for it. It should also be possible to do this inlining at compile time.I investigated this further, and it turns out Dalvik doesn't do inlining at this date.

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Android :: Objective-C To Java Cross Compiler

May 7, 2010

It is clear that cross compilers will not be allowed by the Apple App Store, so a developer will need to be familiar with Objective-C to create applications for the iPhone.I was wondering, is there a cross compiler that will take Objective-C application code and rebuild it into a similar Java application that can be packaged for Android? That way, a developer could still learn just one language (obj-c) but put out applications on many devices.I understand that the Java port would be less optimal than a natively coded application, but could conceivably save a developer some time.

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Android :: Dalvik JIT Compiler On Linux X86 Or Mac Build

Jul 1, 2010

As I've heard from Google IO 2010 session, Dalvik JIT compiler just support ARM processor.Do this mean my own build of Android source on Linux X86 or Mac OS X can not support JIT compiler?Should I use some target board with ARM processor to test Dalvik JIT compiler?

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Android :: Add Compiler Flags To Standard Build.xml

May 17, 2010

I want to add -Xlint:deprecated to the java compiler while building android app.I've seen the compilerarg tag inside javac tags, but the generated build.xml for the standard project doesn't have such a tag.

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Android :: Code Works In One Project But Won't Compiler

Oct 14, 2010

The following code was copied from one project to another. No errors in project one.

In project 2 I get:
-The method onClick(View) of type new View.OnClickListener((){} must override a superclass method
-implements androd.view.View.OnClickListener.onClick

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HTC EVO 4G :: Market Not Working - Download Explanation Point Unsuccessful?

Oct 2, 2010

I tried to download something today and got the explanation point that the download was unsuccessful. Power cycles my EVO and im getting the same thing.

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Sony Ericsson Xperia X10 : Explanation Point On Boot Screen

Jul 18, 2010

I got my x10 yesterday and played all day long. Everything was fine untill I try to upgrade the software.I used Sony Update Service software and it give error at the middle of the process.Now, I got explanation point on my screen when I turn it on. I can't do anything.Any ideas, how to fix?

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Android :: Internal Compiler Error When Compiling Native Code

Aug 9, 2010

Currently I am trying to compile native code for Android. The code is from the OpenCV port for Android. I pasted all the code correctly in my project and edited my make files accordingly. When I set android:debuggable to false everything works fine and I get my native library. When I try while android:debuggable is set to true I get an error.

Here is a part of the log:

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

From what I have found on the internet this is caused by the optimization level of the compilation. As long as the code isn't compiled so that is is debuggable afterwards everything should be fine.

Now apparently it is possible to avoid this by setting APP-OPTIM := release in the Application.mk or adding -O2 to LOCAL_CFLAGS. I have tried both and still I get this error.

Right now I don't really care that much about debugging my native code, but I would like to have basic debugging enabled. And I don't want to keep switching android:debuggable in my manifest every time I want to compile. I'm not even sure if it is okay at all if I just set android:debuggable to false pre compiling and to true post compiling, but I am sure I will forget it every second run.

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Android :: Buildsystem On Ubuntu 10.04 X86-64 Occrur Internal Compiler Error

Jul 22, 2010

I'm trying to build android system ; enviroment: ubuntu 10.04, gcc-4.4 jdk 1.6-0-20
get source code follows http://source.android.com/source/download.html

$ . build/envsetup.sh

$ choosecombo

$ make

then compiler error occurs:

CODE:........

In line 554: the code below:

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

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Android : App Crashes - Can't Find A Java Method Despite - No Compiler Error

Aug 20, 2010

My Android app runs fine, but: If I insert a call to WebView.setScrollbarFadingEnabled, it crashes saying:

Could not find method android.webkit.WebView.setScrollbarFadingEnabled, referenced from [my class]
VFY: unable to resolve virtual method 289: Landroid/webkit/WebView;.setScrollbarFadingEnabled (Z)V


I am using Android 1.5, not a custom ROM. My app defines minSdkVersion="3" I always clean before compiling.

Is setScrollbarFadingEnabled unavailable in Android 1.5? If so, why don't I receive a compiler error?

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Android : Extending Parcelables - Got Syntax Error From Aidl Compiler

Jul 15, 2009

I've run into the following issue:

Say I have an Animal class, which is parcelable, and I have a Dog class and a Cat class, which are subclasses of Animal and also implement Parcelable.

Say I have a service with the following AIDL interface:

sendAnimals(List<Animal> animals);

Now I'm calling this remote interface from some client application, passing it a List containing Cats and Dogs. What happens now is that android calls the Cat's and the Dog's writeToParcel() methods at the client side, but at the server side, the Animal's CREATOR is used, which calls Animal's readFromParcel() method. So the right data is sent from the client, but the wrong unmarshalling code is executed at the server.

I have tried to put this in the AIDL file:

sendAnimals(List<T extends Animal> animals);

This results in a syntax error from the aidl compiler though.

My current workaround is as follows: - In each specific Animal subtype's writeToParcel() method, I write the class name as a String into the Parcel as the first element. - In the Animal's CREATOR.createFromParcel() I read the first String out of the parcel, and based on that I create the appropriate type and call the appropriate readFromParcel() method.

I think this is kind of ugly though. I would expect the android framework to take care of this for me.

(My application is not actually dealing with animals, this is just to make it simpler to explain the issue)

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Motorola Droid X :: Possible To Link A Guide - Quick Explanation / Make My Own Icons?

Oct 14, 2010

Fabulous or any other ROM/theme creator i was wondering if its possible to maybe link to a guide or a quick explanation or how to make my own icons like for the notification bar? I.e. The battery, 3g... Stuff like that and how to know what size and everything.

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Motorola Droid :: New JIT Compiler For 2.2 Be Faster Than Overclocking?

May 20, 2010

Let's discuss board. Will the new JIT Compiler for 2.2 (FroYo) be faster than overclocking? And when we have 2.2 can we over clock?

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Android :: Android How To Send Data From Server To Android With No Request From Android?

Oct 19, 2010

today i meet the problem.i need technic can control the android machine from server.then i want send data from server to android with no request from android.

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Android :: Android 1.6 - Android - View - WindowManager$BadTokenException - Unable To Add Window - Token Null Is Not For An Application

Apr 14, 2010

I'm trying to open a dialog window, but every time I try to open it it throws this exception:

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

I'm creating it by calling showDialog with the display's id. The onCreateDialog handler logs fine and I can step through it without an issue, but I've attached it since it seems like I'm missing something:

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

Is there something missing from this? Some questions have talked about having this problem when creating a dialog from onCreate, which happen because the activity isn't created yet, but this is coming from a call from a menu object, and the appContext variable seems like it is correctly populated in the debugger.

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Android :: Android WebView Not Loading A JavaScript File But Android Browser Loads It Fine

Jun 3, 2010

I'm writing an application which connects to a back office site. The backoffice site contains a whole slew of JavaScript functions, at least 100 times the average site. Unfortunately it does not load them, and causes much of the functionality to not work properly. So I am running a test. I put a page out on my server which loads the FireBugLite javascript text. Its a lot of javascript and perfect to test and see if the Android WebView will load it. The WebView loads nothing, but the browser loads the Firebug Icon. What on earth would make the difference, why can it run in the browser and not in my WebView? Any suggestions.
More background information, in order to get the stinking backoffice application available on a Droid (or any other platform except windows) I needed to trick the bakcoffice application to believe what's accessing the website is Internet Explorer. I do this by modifying the WebView User Agent.Also for this application I've slimmed my landing page, so I could give you the source to offer me aid. package ksc.myKMB;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.Window;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebSettings;
import android.webkit.WebViewClient;
import android.widget.Toast;
public class myKMB extends Activity {
I already have JavaScript on the web browser on, the problem is the web view is acting to different from the web browser.

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Android :: Resolve The Error - Com.android Internal R Cannot Be Resolved - Using Android File MultiAutoCompleteTextView.java

Aug 15, 2010

I want to implement my own Tokenizer base on the file
"MultiAutoCompleteTextView.java",

but I encounter an error "com.android.internal.R cannot be resolved" when I try to

import "MultiAutoCompleteTextView.java" to my project.

code:.................

I haven't research any solutions to resolve this problem.How to correct "com.android.internal.R.attr.autoCompleteTextViewStyle" my own attr?

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Android :: Does Android Eclair Code Base Support Plugins In Android Browser?

Jan 11, 2010

1- Does Android Browser (Éclair code base) support the "plug-in" or not?

2- Why "Google Gears" support is removed from the clair code base?

I searched the forum and came to know that earlier version of the Android does not support it at all? Here is the link for that, but this query asked in Dec'2008.

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Android :: Android How To Edit Specific Record From Database In Android Programming

Jan 5, 2010

At first,I have a database created by using Ruby on rails.I just already implement insert function(HTTPPost) in my Android Application and it's work.But I don't know how to retrieve specific record from my databases and insert it back to specific record in Android (Like edit function in RoR)This is my insert code :
private void insertComment() {DefaultHttpClient client = new DefaultHttpClient();HttpPost post = new HttpPost("http://10.10.3.87:3000/comments");
// Configure the form parameters
List<NameValuePair> nvps = new ArrayList<NameValuePair>();
nvps.add(new BasicNameValuePair("comment[content]", t_comment.getText().toString();
nvps.add(new BasicNameValuePair("comment[id_account]", "1"));
nvps.add(new BasicNameValuePair("comment[id_place]", Integer.toString(position)I really try many ways out but it doesn't work and it takes very long time to fight with this piece of code. Actually, I really don't know how to specify RowID to HTTPPost.

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Android :: Android.. How To Upload Data From Android Phone To Remote Database?

Sep 17, 2010

I am doing some android development, and now I need to send some android application generated data onto a remote server (a database)?How can I do that? can I use direct JDBC connection and sql?

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Android :: Sending Info From Android Phone To An Computer IP With Android Emulator

Oct 9, 2010

So i am making a android app, and i want it to be so if i call lets say 911 it sends my GPS coordinents to a certain IP, i know everything but how i make it so if i call 911 it sends the info and how i can make it send the info to the IP via 3g,

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Android :: Android Market Hiding Apps With Bluetooth Permissions From Android 1.5 And 1.6

Jul 10, 2010

I released updates of my apps yesterday and they are being hidden from android 1.5 and 1.6 phones.

This is due to a Market bug which hides apps with bluetooth permissions from android 1.5 and 1.6.

Come on Google fix the market. We spend countless hours making are apps work on ALL android versions and now you do this...

This issue has been raised since June, but has only affected me since i made an update to the market yesterday.

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