Breakpoints not getting hit in Android Studio

I'm using Windows 7 and have recently switched from Eclipse to Android Studio. I am now having trouble debugging.

Running Android Studio 0.8.6, I set up a completely default install, I create a default empty project, targeting the ICS SDK, using the new project wizard. I then put a breakpoint in onCreate, click on the debug button and run.

The debugger attached as I can see the message "Connected to the target VM" in the debugger window.

I know the code is being executed because I am updating some text in the UI to show this.

I have tried putting breakpoints in many places but none are hit.

I'm pulling my hair out here as I just cannot see what I am doing wrong. I'm new to gradle so I think there may be some settings in gradle that I should be changing, but surely an absolutely standard project built with the wizard should let me hit breakpoints?

One thing I noticed is that in my build.gradle file there is no mention of a debug build, only a release. I wondered if that might be the problem?

buildTypes {
    release {
        runProguard false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}

Note. I have tried this on both my own device and the emulator

UPDATE:

I changed the settings in the View Breakpoints options to turn on "Java Exception Breakpoints" but only for uncaught exceptions. Then, at the end of onCreate I deliberately cause a NullPointerException. When I run in debug now, I still don't hit my actual code and don't see the code break on my source, but the program does pause. I know it is my NullPointerException that is causing this because when I remove it, I can see that the code continues and does not break.

At the point that my code breaks the debug window shows that I am in the "main" thread, in a function called "performLaunchActivity". I cannot see any more information than this. Presumably therefore I am debugging through whatever level of code is calling performLaunchActivity but that my source is being treated as if I can't step through it?

回答1:

Make sure your JDK is latest and your system contains only one JDK.

回答2:

Try to remove line minifyEnabled true in file \app\build.gradle at buildTypes - debug section. Or use this screen and set Minify Enabled to false

回答3:

The gradle part is completely fine.I got the same code and he debugger works fine. How are you setting breakpoints? You just need to single click on the extreme left of the code window and a red ball would appear.

Refer : https://developer.android.com/sdk/installing/studio-debug.html