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"Select debug app" and "Wait for debugger" are new feature in Jelly Bean, does someone know how to use these new features?
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Go to Settings > Developer options > Select debug app and choose your app from the list, then click Wait for debugger. Wait for the app to load and a dialog to appear telling you the app is waiting for a debugger.
Navigate to Settings -> System -> Developer options and then scroll to the Debugging section. Click on “Select debug app”. Select the application you want to debug from the list.
When using a remote debugger to debug an app on your device, this setting allows you to relax a few restrictions on the ability for developers to pause execution of the chosen app while debugging.
If your app is already running, you don't need to update it to add the breakpoint—just click Attach debugger to Android proccess . Otherwise, start debugging by clicking Debug .
When an app is selected using this option, debugging of this app via an attached debugger is allowed to pause execution of the app at a breakpoint for a long period of time without issuing a warning, and enables the Wait for debugger option allowing the execution of this app to pause after launching until the debugger is able to attach to it.
This allows you t debug your apps, and to use adb to copy files, check processes running on your device, etc. Press Select debug app, and select your application. Optional: enable Stay Awake. This is nice to avoid your Android from locking while you are trying to run and test apps on your device.
From the Debugger drop-down menu, you can select a different debug type. By default, Android Studio uses the Auto debug type to select the best debugger option for you, based on whether your project includes Java or C/C++ code.
If you see a dialog asking if you want to "switch from Run to Debug," that means your app is already running on the device and it will restart in order to begin debugging. If you'd rather keep the same instance of the app running, click Cancel Debug and instead attach the debugger to a running app.
I found the answer here: http://developer.android.com/tools/debugging/debugging-devtools.html
Lets you select the application to debug. You do not need to set this to attach a debugger, but setting this value has two effects:
- It will prevent Android from throwing an error if you pause on a breakpoint for a long time while debugging.
- It will enable you to select the Wait for Debugger option to pause application startup until your debugger attaches (described next).
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It is a mystery to me also, but I'll share my experience. I cannot see that these options change the phone's behavior. Regardless of the settings I choose, the Galaxy Nexus behaves like my older phones that do not have the settings.
"Waiting for debugger" is a dialog that I see whenever I start running an app from Eclipse. It stays up for a while, and then my app starts running. This has been the case since I started Android development, and it still works that way on my old and new devices, regardless of the setting.
If I click on "Select Debug App", it allows me to select an app from the already installed apps on my phone that allow debugging, which are the apps that I wrote myself.
On my Galaxy Nexus it does not matter whether I select "Nothing" or one of my debuggable apps, I can still debug any app from Eclipse. I cannot even see a difference in time it takes to load an app over the ADB connection.
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