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I would like to test my application for cases of low network connectivity. Except standing in the elevator, what is the best way to do this? I've tried wrapping my phone in an aluminum foil, but it didn't help much.
I need to test it on a real device, not in an emulator.
This may sound a little crazy, but a microwave oven serves as a microwave shield. Therefore, putting your device inside a microwave oven (DO NOT turn on the microwave oven while your device is inside!) will cause your signal strength to drop significantly. It definitely beats standing inside an elevator...
You can use emulator for this. Take a look at this page: Android Emulator. Pay attention to next two arguments:
-netdelay <delay>
Set network latency emulation to . Default value is none. See
the table in Network Delay Emulation for supported values.
-netspeed <speed>
Set network speed emulation to . Default value is full. See
the table in Network Speed Emulation for supported values.
Speeds for reference in increasing kbps:
UP DOWN
-------- ----------
gsm GSM/CSD 14.4 14.4
hscsd HSCSD 14.4 57.6
gprs GPRS 28.8 57.6
umts UMTS/3G 384.0 384.0
edge EDGE/EGPRS 473.6 473.6
hsdpa HSDPA 5760.0 13,980.0
lte LTE 58,000.0 173,000.0
evdo EVDO 75,000.0 280,000.0
full No limit ∞ ∞
Since iPhones developer option apply on wifi tethering, you can get an iPhone which has iOS 6 and above (and has been set to use for developments with the xcode), set it to emulate the desired network profile, connect your Android device to its hotspot
Update for Android Studio v 1.5 or greater
As #LouMorda mentioned in a comment below that the Emulator tab mentioned in original post has been removed in Android Studio v 1.5.
Now They've placed these settings in Simulator Settings in AVD Manager.
To access these settings:
Select Tools -> Android -> AVD Manager
Click the Edit AVD button (pencil icon)
The Network Settings can be accessed after clicking the Show Advanced Settings button
Here is a screenshot of how it may appear:
Original Post
For anyone using Android Studio IDE:
Go to Run -> Edit Configurations
Select Android Application -> [Your App]
Select Emulator tab
Here you can change different values for Network Speed(internet speed) and Network Latency (delay) to simulate different speeds and latencies etc
Alternatively, you can enter various arguments in Additional command line options text field as mentioned in #inazaruk's answer.
The screenshot below describes how this Run Configuration screen looks like:
I know its a bit late to answer to this question, but i hope this helps others facing similar issues!
Edit
For anyone using eclipse, see #Abhi's answer below.
I know it's an old question but...
Some phones nowadays have a setting to utilize 2G only. It's perfect for simulating slow internet on a real device.
Years old but hey, I'll chime in with my foolproof method with Genymotion.
Download the Charles free trial: http://www.charlesproxy.com/download/
Install it
ClickProxy -> Throttle Settings
Set up your HTTP throttled speeds
Close that window
Click Proxy -> Throttling to enable the throttle
Open up a Genymotion emulator
Open the wifi settings
Long press the enabled wifi connection
Click Modify Network
Click Show Advanced Options
Set Proxy to Manual
Set the Proxy hostname to 10.0.3.2
Set the Port to 8888
Click Save
And now your network will be throttled!
I have one strategy to settle your problem. You can use the application of proxy to modify or monitor your net status. e.g, Charles.
You ought to change the default config of the Charles like the following picture I posted.
And finally, you will discover the net status has been shaped into lower pace.
You are also able to test slow internet connectivity on an real android device:
Tested with Samsung Galaxy S8 + Android 8.0.0
Go to Settings -> Connection -> Mobile Network -> and under networkmode you can choose to only use 2G or 3G connections
In Android Studio, while running an emulator:
1- Hit settings button at the bottom of the emulator sidebar
2- Go to Cellular
3- Set Network Type
Easy way to test your application with low/bad connection in emulator:
Go Run > Run configurations, select your Android Application, and there go to Target tab.
Look Emulator launch parameters. Here, you can easy modify Network Speed and Network Latency.
There's a simple way of testing low speeds on a real device that seems to have been overlooked. It does require a Mac and an ethernet (or other wired) network connection.
Turn on Wifi sharing on the Mac, turning your computer into a Wifi hotspot, connect your device to this. Use Netlimiter/Charles Proxy or Network Link Conditioner (which you may have already installed) to control the speeds.
For more details and to understand what sort of speeds you should test on check out: http://opensignal.com/blog/2016/02/05/go-slow-how-why-to-test-apps-on-poor-connections/
I'm surprised nobody mentioned this. You can tether via Bluetooth, and separate them by ten+ meters(or less with obstacles). You've got a real bad connection. No microwave, no elevator, no software needed.
Or on an actual device you can go to Settings -> Mobile Networks -> Preferred network types and chose the slowest available...
Of course this is very limited, but for some test- purposes it might be enough.
Facebook built something called Augmented Traffic Control. A brief summary from their GitHub page:
Augmented Traffic Control (ATC) is a tool to simulate network conditions. It allows controlling the connection that a device has to the internet. Developers can use ATC to test their application across varying network conditions, easily emulating high speed, mobile, and even severely impaired networks. Aspects of the connection that can be controlled include:
bandwidth
latency
packet loss
corrupted packets
packets ordering
In order to be able to shape the network traffic, ATC must be running on a device that routes the traffic and sees the real IP address of the device, like your network gateway for instance. This also allows any devices that route through ATC to be able to shape their traffic. Traffic can be shaped/unshaped using a web interface allowing any devices with a web browser to use ATC without the need for a client application.
You can find it here on GitHub: https://github.com/facebook/augmented-traffic-control
They have also written a blog post about it: https://code.facebook.com/posts/1561127100804165/augmented-traffic-control-a-tool-to-simulate-network-conditions/
UPDATE on the Android studio AVD:
open AVD manager
create/edit AVD
click advanced settings
select your preferred connectivity setting
No microwaves or elevators :)
for and mac OS user you can use Network Link Conditioner which could be downloaded from apple. set it as a AP on mac and any divices could connected it.
you can either use facebook open source tools ATC
http://facebook.github.io/augmented-traffic-control/
Go Run > Run configurations, select your Android Application, and there go to Target tab. Do changes as shown in the figure.
I was struggling with this problem for half a day, finally I came to this solution:
Testing on a real device doesn't make much sense overall as you have to go through a lot to make it work. The only logical way to achieve real testing is to make your phone connect to a low quality cellular network, like EDGE, if your phone company provides it. You can try to do this by dialing *#*#4636#*#* in the phone app
The original Android emulator is way too slow for testing and doesn't achieve more than the solution above.
The best way to do this is using Genymotion. It's an Android emulator with much better performance than the original AVDs and the version for personal use is free.
After you created your virtual device in Genymotion, just go through this tutorial to set a proxy for the device.
Run a proxy server on your host machine that simulates bad network conditions, like Crapify or Toxiproxy (I only tested the former) and you're good to go.
Update:
I just realized you can pick the very same strategy with real devices too. I feel like an idiot for not realizing it sooner. Just start a Crapify proxy on your computer, set your phone proxy to your computer's local address and voila, you've got crappy internet on your phone.
Do you want to test for no network connection, or just a slow network connection? If the former, you can go to Settings > Wireless & networks > Airplane mode and turn Airplane mode on. That will let you test network unavailability on an actual device.
as suggested by #VicVu Charles (or any other proxy tool) is an easier way to go. But I would Like to add that you can do this with your device also, not just genymotion or other emulators. Process will be the same:
Modify your device/emulator's wifi setting to use manual proxy. And then Set the Proxy hostname & port
a. set the hostname as ip of your system (get the ip of your pc/mac using ifconfig/ifconfig)
b. set the port number of genymotion (check the proxy settings in charles)
PS: Your device/emulator MUST be using the same wifi since the ip you are using will most probably be the private ip.
Open terminal inAndroid Studio and Go to ../../Android/sdk/tools. 'emulator' executable should be available here.
Run ./emulator -netdelay "delay_in_millis" -avd "emulator_device_name"
Ex: ./emulator -netdelay 60000 -avd Nexus_5_API_21
Now build your app and install it in emulator.
Run your scenario in app.
Make sure you have your code changes in app that sets timeout to your request and handles that.
Just go to Android device monitor from Android studio , then DDMS -> Emulator Control.There will be Speed and Latency properties.
I found netlimiter4 to be the best solution for throttling data to emulators.
It provides for granular control through a decent gui and gives you graphical feedback on the data throughput to each process. Currently in a free beta.
screenshot
http://www.netlimiter.com/products/nl4
There are apps available on the play store to throttle to actual devices but they require root(I cant provide any advice as to how well they work, if at at all - YMMV.)
search for bradybound on the play store, I can't post more than one link..
have you tried this?
Settings - Networks - More - Mobile Networks - Network mode - Select preferred network (2G for example).
Another method i used was mentioned above. Connect via iPhone hot spot.
Hope this helps.
I'm using mitmproxy HTTPS proxy. https://mitmproxy.org/
Mitmproxy is an open source proxy application that allows intercepting HTTP and HTTPS connections between any HTTP(S) client. It allows to monitor, capture and alter these connections in realtime. Change request, response, header, ...
Additionally you can intercept different requests.
e.g. response_delay.py:
from mitmproxy import http
from time import sleep
def response(flow: http.HTTPFlow) -> None:
sleep(5.0)
Then executing this comment delays all responses from the server:
mitmproxy --cert \*.asdf.at=./cert.pem --scripts response_delay.py
In my app I'm using certificate pinning, so you need to add the certificate (private + public)
cat private.key public.key > cert.pem
You can find a simple Tutorial here.
You can find other scripting examples here.
Very old post but I'll add my two cents. I have been VERY happy with this hardware product ( https://apposite-tech.com/products/linktropy-mini/ ) which has enabled us to simulate a lot of real-world conditions. For a long time we had challenges troubleshooting various things that would work in emulator or with airplane mode.
We have several different profiles setup from zero-connectivity to various stages of marginal connectivity, with different degrees of latency, packet loss, and bit-errors. The great thing about it is we can change these on the fly without having to relaunch the app in an emulator. The price has been entirely worth it for our shop, and it's dead simple to use.
I needed to throttle low internet on AndroidTV native device and based on what I have read, the most suitable solution was to limit the internet access directly in my router.
Go to router settings (locally it is smth like 192.168.0.1) -> set up DHCP server (if it's not running) -> choose IP address of a device and set the restriction;
I want to limit my network speed to emulate bad network in Android emulator.
I have tried to install BradyBound from this topic, but it requires root access, which I don't have on emulator. Maybe exist another solution? Maybe via shell?
On android emulator click 3 dot at the right section. Then select cellular and choose network type.
As the title says, my VS Android Emulator has no connection to the internet. In the Android screen, it says it's connected to WiFi, but browsing doesn't work.
Expect the problem is I am running Windows 10 in Parallels on my MacBook, but I don't know how to fix it. Windows "thinks" it's connected to ethernet.
My adapter settings in Windows look like this:
Hyper-V network settings for my emulator:
Network settings in Parallels is set to Bridged Network WIFI
Try enabling Enable Virtual LAN Identification from your Hyper-V Network settings screen. If that doesn't work, you may try changing the switch and VLAN IDs until it works.
Microsoft recently announced a release of VS for Mac. That will be a far more user friendly option or even better go straight for the gold and use Android studio 2. You really shouldn't have to run Parallels at all for what you are trying to do, and this is what is ultimately giving you problems in the first place. Even if you do solve this internet issue there will most likely be another issue that crops up and there are enough problems to deal with devving as it is.
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 2 years ago.
Improve this question
I would like to test my application for cases of low network connectivity. Except standing in the elevator, what is the best way to do this? I've tried wrapping my phone in an aluminum foil, but it didn't help much.
I need to test it on a real device, not in an emulator.
This may sound a little crazy, but a microwave oven serves as a microwave shield. Therefore, putting your device inside a microwave oven (DO NOT turn on the microwave oven while your device is inside!) will cause your signal strength to drop significantly. It definitely beats standing inside an elevator...
You can use emulator for this. Take a look at this page: Android Emulator. Pay attention to next two arguments:
-netdelay <delay>
Set network latency emulation to . Default value is none. See
the table in Network Delay Emulation for supported values.
-netspeed <speed>
Set network speed emulation to . Default value is full. See
the table in Network Speed Emulation for supported values.
Speeds for reference in increasing kbps:
UP DOWN
-------- ----------
gsm GSM/CSD 14.4 14.4
hscsd HSCSD 14.4 57.6
gprs GPRS 28.8 57.6
umts UMTS/3G 384.0 384.0
edge EDGE/EGPRS 473.6 473.6
hsdpa HSDPA 5760.0 13,980.0
lte LTE 58,000.0 173,000.0
evdo EVDO 75,000.0 280,000.0
full No limit ∞ ∞
Since iPhones developer option apply on wifi tethering, you can get an iPhone which has iOS 6 and above (and has been set to use for developments with the xcode), set it to emulate the desired network profile, connect your Android device to its hotspot
Update for Android Studio v 1.5 or greater
As #LouMorda mentioned in a comment below that the Emulator tab mentioned in original post has been removed in Android Studio v 1.5.
Now They've placed these settings in Simulator Settings in AVD Manager.
To access these settings:
Select Tools -> Android -> AVD Manager
Click the Edit AVD button (pencil icon)
The Network Settings can be accessed after clicking the Show Advanced Settings button
Here is a screenshot of how it may appear:
Original Post
For anyone using Android Studio IDE:
Go to Run -> Edit Configurations
Select Android Application -> [Your App]
Select Emulator tab
Here you can change different values for Network Speed(internet speed) and Network Latency (delay) to simulate different speeds and latencies etc
Alternatively, you can enter various arguments in Additional command line options text field as mentioned in #inazaruk's answer.
The screenshot below describes how this Run Configuration screen looks like:
I know its a bit late to answer to this question, but i hope this helps others facing similar issues!
Edit
For anyone using eclipse, see #Abhi's answer below.
I know it's an old question but...
Some phones nowadays have a setting to utilize 2G only. It's perfect for simulating slow internet on a real device.
Years old but hey, I'll chime in with my foolproof method with Genymotion.
Download the Charles free trial: http://www.charlesproxy.com/download/
Install it
ClickProxy -> Throttle Settings
Set up your HTTP throttled speeds
Close that window
Click Proxy -> Throttling to enable the throttle
Open up a Genymotion emulator
Open the wifi settings
Long press the enabled wifi connection
Click Modify Network
Click Show Advanced Options
Set Proxy to Manual
Set the Proxy hostname to 10.0.3.2
Set the Port to 8888
Click Save
And now your network will be throttled!
I have one strategy to settle your problem. You can use the application of proxy to modify or monitor your net status. e.g, Charles.
You ought to change the default config of the Charles like the following picture I posted.
And finally, you will discover the net status has been shaped into lower pace.
You are also able to test slow internet connectivity on an real android device:
Tested with Samsung Galaxy S8 + Android 8.0.0
Go to Settings -> Connection -> Mobile Network -> and under networkmode you can choose to only use 2G or 3G connections
In Android Studio, while running an emulator:
1- Hit settings button at the bottom of the emulator sidebar
2- Go to Cellular
3- Set Network Type
Easy way to test your application with low/bad connection in emulator:
Go Run > Run configurations, select your Android Application, and there go to Target tab.
Look Emulator launch parameters. Here, you can easy modify Network Speed and Network Latency.
There's a simple way of testing low speeds on a real device that seems to have been overlooked. It does require a Mac and an ethernet (or other wired) network connection.
Turn on Wifi sharing on the Mac, turning your computer into a Wifi hotspot, connect your device to this. Use Netlimiter/Charles Proxy or Network Link Conditioner (which you may have already installed) to control the speeds.
For more details and to understand what sort of speeds you should test on check out: http://opensignal.com/blog/2016/02/05/go-slow-how-why-to-test-apps-on-poor-connections/
I'm surprised nobody mentioned this. You can tether via Bluetooth, and separate them by ten+ meters(or less with obstacles). You've got a real bad connection. No microwave, no elevator, no software needed.
Or on an actual device you can go to Settings -> Mobile Networks -> Preferred network types and chose the slowest available...
Of course this is very limited, but for some test- purposes it might be enough.
Facebook built something called Augmented Traffic Control. A brief summary from their GitHub page:
Augmented Traffic Control (ATC) is a tool to simulate network conditions. It allows controlling the connection that a device has to the internet. Developers can use ATC to test their application across varying network conditions, easily emulating high speed, mobile, and even severely impaired networks. Aspects of the connection that can be controlled include:
bandwidth
latency
packet loss
corrupted packets
packets ordering
In order to be able to shape the network traffic, ATC must be running on a device that routes the traffic and sees the real IP address of the device, like your network gateway for instance. This also allows any devices that route through ATC to be able to shape their traffic. Traffic can be shaped/unshaped using a web interface allowing any devices with a web browser to use ATC without the need for a client application.
You can find it here on GitHub: https://github.com/facebook/augmented-traffic-control
They have also written a blog post about it: https://code.facebook.com/posts/1561127100804165/augmented-traffic-control-a-tool-to-simulate-network-conditions/
UPDATE on the Android studio AVD:
open AVD manager
create/edit AVD
click advanced settings
select your preferred connectivity setting
No microwaves or elevators :)
for and mac OS user you can use Network Link Conditioner which could be downloaded from apple. set it as a AP on mac and any divices could connected it.
you can either use facebook open source tools ATC
http://facebook.github.io/augmented-traffic-control/
Go Run > Run configurations, select your Android Application, and there go to Target tab. Do changes as shown in the figure.
I was struggling with this problem for half a day, finally I came to this solution:
Testing on a real device doesn't make much sense overall as you have to go through a lot to make it work. The only logical way to achieve real testing is to make your phone connect to a low quality cellular network, like EDGE, if your phone company provides it. You can try to do this by dialing *#*#4636#*#* in the phone app
The original Android emulator is way too slow for testing and doesn't achieve more than the solution above.
The best way to do this is using Genymotion. It's an Android emulator with much better performance than the original AVDs and the version for personal use is free.
After you created your virtual device in Genymotion, just go through this tutorial to set a proxy for the device.
Run a proxy server on your host machine that simulates bad network conditions, like Crapify or Toxiproxy (I only tested the former) and you're good to go.
Update:
I just realized you can pick the very same strategy with real devices too. I feel like an idiot for not realizing it sooner. Just start a Crapify proxy on your computer, set your phone proxy to your computer's local address and voila, you've got crappy internet on your phone.
Do you want to test for no network connection, or just a slow network connection? If the former, you can go to Settings > Wireless & networks > Airplane mode and turn Airplane mode on. That will let you test network unavailability on an actual device.
as suggested by #VicVu Charles (or any other proxy tool) is an easier way to go. But I would Like to add that you can do this with your device also, not just genymotion or other emulators. Process will be the same:
Modify your device/emulator's wifi setting to use manual proxy. And then Set the Proxy hostname & port
a. set the hostname as ip of your system (get the ip of your pc/mac using ifconfig/ifconfig)
b. set the port number of genymotion (check the proxy settings in charles)
PS: Your device/emulator MUST be using the same wifi since the ip you are using will most probably be the private ip.
Open terminal inAndroid Studio and Go to ../../Android/sdk/tools. 'emulator' executable should be available here.
Run ./emulator -netdelay "delay_in_millis" -avd "emulator_device_name"
Ex: ./emulator -netdelay 60000 -avd Nexus_5_API_21
Now build your app and install it in emulator.
Run your scenario in app.
Make sure you have your code changes in app that sets timeout to your request and handles that.
Just go to Android device monitor from Android studio , then DDMS -> Emulator Control.There will be Speed and Latency properties.
I found netlimiter4 to be the best solution for throttling data to emulators.
It provides for granular control through a decent gui and gives you graphical feedback on the data throughput to each process. Currently in a free beta.
screenshot
http://www.netlimiter.com/products/nl4
There are apps available on the play store to throttle to actual devices but they require root(I cant provide any advice as to how well they work, if at at all - YMMV.)
search for bradybound on the play store, I can't post more than one link..
have you tried this?
Settings - Networks - More - Mobile Networks - Network mode - Select preferred network (2G for example).
Another method i used was mentioned above. Connect via iPhone hot spot.
Hope this helps.
I'm using mitmproxy HTTPS proxy. https://mitmproxy.org/
Mitmproxy is an open source proxy application that allows intercepting HTTP and HTTPS connections between any HTTP(S) client. It allows to monitor, capture and alter these connections in realtime. Change request, response, header, ...
Additionally you can intercept different requests.
e.g. response_delay.py:
from mitmproxy import http
from time import sleep
def response(flow: http.HTTPFlow) -> None:
sleep(5.0)
Then executing this comment delays all responses from the server:
mitmproxy --cert \*.asdf.at=./cert.pem --scripts response_delay.py
In my app I'm using certificate pinning, so you need to add the certificate (private + public)
cat private.key public.key > cert.pem
You can find a simple Tutorial here.
You can find other scripting examples here.
Very old post but I'll add my two cents. I have been VERY happy with this hardware product ( https://apposite-tech.com/products/linktropy-mini/ ) which has enabled us to simulate a lot of real-world conditions. For a long time we had challenges troubleshooting various things that would work in emulator or with airplane mode.
We have several different profiles setup from zero-connectivity to various stages of marginal connectivity, with different degrees of latency, packet loss, and bit-errors. The great thing about it is we can change these on the fly without having to relaunch the app in an emulator. The price has been entirely worth it for our shop, and it's dead simple to use.
I needed to throttle low internet on AndroidTV native device and based on what I have read, the most suitable solution was to limit the internet access directly in my router.
Go to router settings (locally it is smth like 192.168.0.1) -> set up DHCP server (if it's not running) -> choose IP address of a device and set the restriction;
I read on many other topics that the Android emulator starts really slow. Indeed, it takes +15 mins to start. However, on my machine is slow even after that.
The 'phone' responds with a 3-4 seconds delay and everything has a huge lag.
Is there any way to improve the performance of my laptop (Asus 1201N) is too rusty for the Android emulator?
PS: Tried in different emulator resolutions and the result is the same
Edit: My laptop has 2 cores with HyperThreading. And it shows as 4 CPU in Device Manager. However, when using the emulator, just one of the graphs is at 100%. Can I do something to make it work multi core?
Do you have "Disable Boot Animation" checked?
Also, if that doesn't fix it, one thing that helps is that you never actually have to close the emulator screen while you're coding. If you click debug when it's already open, your APK will get uploaded to the emulator and start pretty much immediately. For some reason it took me a while to figure out that I didn't have to manually close the emulator.
One thing I learned that helped me is that once the emulator is open from your first debug run you DO NOT have to close it. Leave it open, and on your next debug run it will be ready to go without any load up time like when you first open it.
In regards to your slowness after startup I suspect it's just your computer. It runs very fast for me. It starts up in about 20 seconds or less, and once it's open my subsequent debugs load very fast.
I hope at least my first tip helps to save some of your sanity.
Here's what you can try. It does speed up the emulator for me, especially during loading time.
I noticed the emulator is only using a single core of the available CPU. What I did is to set it to use all available processors.
I'm using Windows 7.
When the android emulator is starting, open up the Task Manager, look under the Process tab, look for "emulator-arm.exe" or "emulator-arm.exe *32" ...right click on it, select Processor Affinity and assign as much processor as you like to the emulator.
I think there is few ways to improve the performance of your Android Emulator like
Use Snapshot, this will improve the boot time for consecutive application running
Use x86 Intel Hardware Accelerator
Use 3rd Party Emulator like BlueStacks
Hopefully it will help you to improve the performance and resolve your problems.
Thanks
I had the same problem and in order to solve it I just disabled all the transition animation effects that are enabled under Spare Parts.
it is way too slow for me too.
(slow on both my Pentium 4 (ubuntu) and my dual core 64 laptop (Windows 7)
apparently it uses QEMU - could I perhaps look for the image file and try a different version of qemu?
Another thing I tried is this: http://www.android-x86.org/ (in vmware)
this seems MUCH faster but I can't get it to see the network!
(right now I just want to test some websites in the brower so seeing the network is a must - I'm not doing native apps just yet)
I discovered that instead of running the 'Debug' target, I just run the 'Run' target. The emulator runs a lot smoother when doing so. I only jump into debug mode if I really need it.
To connect to network from android-x86, you neek to manual setup ip manual by use this command in console mode (Alt + F1):
ifconfig eth0 netmask 255.255.255.0 up
after do that, you can check it by type : netcfg in console and you can see this ip is set at your local wmware
you can check it success by ping ip you had been set in command prompt, and after that, you can use adb connect to connect debugger to your virtual android