I'm writing an application for the iPhone in MonoTouch, and I have some performance problems I would like to investigate. I can see from resources on the net, that I should use Instruments for this. I looked up the documentation from Xamarin on how to profile my app with Instruments, but this documentation says I should start Instruments via the Terminal. But when I try to run the command, it says Instruments is not found. I tried looking at the /Developer folder, and there's no Instruments there.
As far as I understand, Instruments is now integrated with XCode 4 (Which is the version I have installed) and so I can't launch Instruments on it's own.
It seems Instruments will only launch when XCode has a project loaded, but how can I open my project in XCode when it's a MonoTouch project?
It seems other people can get it working, as there's alot of questions on SO regarding MonoTouch and Instruments and how to analyze the data. But I haven't been able to find any that tells me how to actually start Instruments and profile my MonoTouch app.
Thanks for any pointers.
If you have Xcode 4.2, try this from a terminal:
open /Developer/Applications/Instruments.app
If you have Xcode 4.3, you can open Instruments from inside Xcode's menu: Xcode -> Open Developer Tool -> Instruments
Related
Does NXP i.MX7D support Google Cast via Android Things?
Android Things Version: Developer Preview 6.1 which has 11.6.0 Play Services.
We need to show the UI on external displays like TV with Android Things, but the Google Cast feature does not seem to work with Chrome Cast.
To Test the code we manipulated our source code, so that it can run on Android Device; which runs perfectly fine. But when we try it on Things, it does not discover any devices to cast.
We also tried similar procedure with the Google Sample - CastRemoteDisplay-android
The above sample works on Android Devices but the same does not work on Android Things 6.1 developer preview; after making required changes to run on Things
We also tried different Play Services versions from 10.x and 11.x
We also tried to change the API level from 23 to 27
But all results the same
NOTE: I am not including any code or stack trace as I feel it is not required. But if any one demands will post the required logs
After lots of trial and research, I found out that the version of Play Services installed on Things Developer Preview 6.1 does not support it. It lacks GMS Core, because of which currently not possible.
In the mean time I'll try to search and side load OpenGapps with GMS Core, but I am not sure if it will work
When deploying an existing Xamarin forms proj from Visual Studio I was getting errors like "Failed to load AOT module ‘System.Net.Http’ while running in aot-only mode". This had worked in the past, it seemed Xcode had recently updated before I hit the problem. I found I was able to get the project deploying by changing the csproj entry 10.0 to 10.3. It looks like I could change this setting and everyone would be ok if they also had updated xcode.
My concern is: Does this change what versions of iOS the application can support? Would it have any other surprises when deployed to the apple store?
One thing I don't understand is I am the only person seeing this issue. Another developer is able to deploy to an iOS device (iPad instead of an iPhone) that also has the latest version of iOS without problems. Running “xcodebuild -version” shows we have the same version of xcode installed (8.3.1) and running “xcodebuild -showsdks” shows we have the same iOS sdk available (iOS 10.3).
There is some good documentation on the iOS SDK version: https://developer.apple.com/library/content/documentation/DeveloperTools/Conceptual/cross_development/Overview/overview.html#//apple_ref/doc/uid/20002001-BABEBGCF
You can build against a higher version of the SDK and run against lower versions of iOS.
Building against different versions of the iOS SDK can cause differences in behavior, these may show as regressions in your application.
It seems that LLDB plugin for Eclipse is still not developed yet, but this article claims that one can debug a program with LLDB-MI driver in Linux. However described way of integrating Eclipse and LLDB doesn't work for me (I always get "command --exec-continue not recognized" error message) and it looks suspicious that embedding LLDB-MI to Eclipse may be so easy.
Could anyone point me to curren materials on this topic? Google shows me only old Eclipse-bug-tracking threads.
There is a project called lldbmi2 that provides most of the functionality one would need. I know it's been developed primarily for the Mac and I don't know if it's been tested on Linux. It's not perfect, but I've been using it on the Mac for months and I'm pleased with its functionality.
See https://github.com/freedib/lldbmi2
Is it possible to run J2ME apps on Android phones? If so, what is the installation procedure?
Otherwise, is it possible to convert .jad files to .apk? In this case, what is the procedure.
(I have already tested the procedure offered by netmite but it doesn't seem to work.)
Using this site http://www.netmite.com/android/srv/2.0/getapk.php you can convert your J2ME application in to Android Application. You need to just supply your .Jad & .Jar file in it and it will generate Android's executable file .apk for you.
However in it doesn't able to convert all the feature of Java ME to Android, but basics can be easily converted.
You can try phoneME, netmite j2me app runner, jblend, jbed like jeme emulators in android. For now, phoneME is the best. you can get various version of phoneME here http://davy.preuveneers.be/phoneme
You also need OI file manager to select files in phoneME.
A complete guide can be found here http://w3epic.com/run-java-apps-j2me-on-android-devices-guide/ for rest of other emulators (if you want to try).
#dennis
I got it, thanks.
MicroEmu open source project hasn't been mentioned yet, and here it goes: https://code.google.com/p/microemu/
I searched for a good JavaME emulator for Android for a long time, and finally found one. This here is what you need:
http://davy.preuveneers.be/phoneme/
No doubt the best there is for Android.
Added 15th January 2016:
Reply from the author of phoneME, Davy Preuveneers, in regards to the Android 5.0+ issue commented by Álvaro Gutiérrez:
Hi,
I am testing on a Samsung Galaxy S4 running Android 5.0.1, and the
"phoneME Advanced - Foundation Profile + MIDP FullHD Resolution" build
seems to run just fine on this device.
Also, following this thread
Position Independent Executables and Android Lollipop,
I ran:
$ readelf -l libcvm.so | grep -i "file type"
and it reports:
Elf file type is DYN (Shared object file)
So according to the website this is OK.
However, for the CDC and Foundation profiles (console like
applications), there is indeed an issue where you get this error:
"Error: only position independent executables (PIE) are supported"
However, for those 2 profile I call a native executables and redirect
the native stdout/stderr streams to Android, whereas for the MIDP dual
stack I load a library and create a complicated wrapper to get things going.
I can recompile with -fPIE and -pie options but will then end up with
binaries that are no longer backwards compatible with devices running
Android 4.0 and below. That is why I added some additional builds to my
website for Android 5+ devices:
http://davy.preuveneers.be/phoneme/?q=node/10
Best regards,
Davy
I want to profile a MonoTouch application in Instruments without an iPad. I am able to profile an app compiled for Simulator but it's no fun without the symbols:
There is no option to generate IPA with dSYM in project build settings—looks like they're only available when compiling for the device.
All I want is a MonoTouch-aware dSYM for Simulator.
Is this possible?
This is unfortunately not possible, because in the simulator we JIT managed code. This means that it is not possible to know before executing the process where methods will be in memory, and Instruments doesn't support the required mechanisms for MonoTouch to inform about JIT'ed methods at runtime [1].
[1] See last comment on the response here: Is it possible to notify DTrace on Mac OS X of dynamically generated code?
Take a look at this - miguel wrote a blog post recently to compile aot for profiling on mac - I think this will give you what you're looking for:
Using Instruments to profile Mac apps built with Mono