How to check the which activity is currently running while debugging the app

Question

I am stuck with a project developed by someone else. Its a very big app. So for the purpose of understanding the code I want to know the flow, basically the name of the activity(the java file in the code) which is currently running in on my phone. I can put break-points in all activities, but is there any other way?

Answer 1

Using ActivityLifecycleCallbacks , you don't need to add handling for all the activities. Do the registration once , it works for ALL activities, and that is it!

public class MyApplication extends Application implements
   ActivityLifecycleCallbacks{

@Override
public void onCreate() {
    super.onCreate();           
}

@Override
public void onActivityStopped(Activity activity) {
    Log.i("Tracking Activity Stopped", activity.getLocalClassName());

}

@Override
public void onActivityStarted(Activity activity) {
    Log.i("Tracking Activity Started", activity.getLocalClassName());

}

@Override
public void onActivitySaveInstanceState(Activity activity, Bundle outState) {
    Log.i("Tracking Activity SaveInstanceState", activity.getLocalClassName());
}

@Override
public void onActivityResumed(Activity activity) {
    Log.i("Tracking Activity Resumed", activity.getLocalClassName());
}

@Override
public void onActivityPaused(Activity activity) {
    Log.i("Tracking Activity Paused", activity.getLocalClassName());
}

@Override
public void onActivityDestroyed(Activity activity) {
    Log.i("Tracking Activity Destroyed", activity.getLocalClassName());
}

@Override
public void onActivityCreated(Activity activity, Bundle savedInstanceState) {
    Log.i("Tracking Activity Created", activity.getLocalClassName());
    }
}

Note that you can identify which activity via activity.getLocalClassName() .

Answer 2

Simple -

In each activity override onStart() method and print log like this -

    @Override
    protected void onStart() {
        super.onStart();
        Log.d("TAG -> ", "YOUR_ACTIVITY_NAME");
    }

When activity start in your device, it will print log in logcat. Hope it will help!

Answer 3

从清单中找出启动活动并找出使用的方法和变量。您可以使用“查找用法”（Ctrl+G）。

Answer 4

If your application extends MultiDexApplication class here is a working solution.

In onCreate() method of your application class that extends MultiDexApplication add the following line to register the callbacks.

@Override
public void onCreate() {
    super.onCreate();
    registerActivityLifecycleCallbacks(new MyActivityLifecycleCallbacks());
} 

Now make an inner class that implements ActivityLifecycleCallbacks as follow

private static final class MyActivityLifecycleCallbacks implements ActivityLifecycleCallbacks {
        public void onActivityCreated(Activity activity, Bundle bundle) {
            Log.v("Application","Created");
        }
        public void onActivityDestroyed(Activity activity) {
            Log.v("Application","Destroyed");
        }
        public void onActivityPaused(Activity activity) {
            Log.v("Application","Paused");

        }
        public void onActivityResumed(Activity activity) {
            Log.v("Application","Resumed");


        }
        public void onActivitySaveInstanceState(Activity activity, Bundle outState) {
            Log.v("Application","onActivitySaveInstanceState");
        }
        public void onActivityStarted(Activity activity) {
            Log.v("Application","Started");
        }
        public void onActivityStopped(Activity activity) {
            Log.v("Application","Stopped");
        }
    }

Now you may use activity.getLocalClassName() in any overridden method you need.

This would be all you need. Happy Debugging :)

Answer 5

You can use adb for it.

In your terminal run adb shell dumpsys activity top .