Android Leak Canary Log

Question

I am using Leaky Canary to detect memory leaks in my app. While I was able to get rid of 2-3 issues before this, I cannot figure out where the leak is from this log

11-14 18:05:05.330 32099-3554/? D/LeakCanary: In com.prism.prism:1.1:2.
11-14 18:05:05.330 32099-3554/? D/LeakCanary: * com.prism.prism.RatePicActivity_ has leaked:
11-14 18:05:05.330 32099-3554/? D/LeakCanary: * GC ROOT android.database.ContentObserver$Transport.mContentObserver
11-14 18:05:05.330 32099-3554/? D/LeakCanary: * references android.app.Activity$SettingsObserver.this$0
11-14 18:05:05.330 32099-3554/? D/LeakCanary: * leaks com.prism.prism.RatePicActivity_ instance
11-14 18:05:05.330 32099-3554/? D/LeakCanary: * Reference Key: 29bcc62a-b7e2-4d80-8cda-be2f841f19aa
11-14 18:05:05.330 32099-3554/? D/LeakCanary: * Device: samsung samsung GT-I9300 m0xx
11-14 18:05:05.330 32099-3554/? D/LeakCanary: * Android Version: 4.4.4 API: 19 LeakCanary: 1.3.1
11-14 18:05:05.330 32099-3554/? D/LeakCanary: * Durations: watch=5024ms, gc=176ms, heap dump=1129ms, analysis=12787ms
11-14 18:05:05.330 32099-3554/? D/LeakCanary: * Details:
11-14 18:05:05.330 32099-3554/? D/LeakCanary: * Instance of android.database.ContentObserver$Transport
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mContentObserver = android.app.Activity$SettingsObserver [id=0x41b22d00]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mDescriptor = java.lang.String [id=0x41913c70]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mOwner = android.database.ContentObserver$Transport [id=0x41b1a878]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mObject = 1570915608
11-14 18:05:05.330 32099-3554/? D/LeakCanary: * Instance of android.app.Activity$SettingsObserver
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   this$0 = com.prism.prism.RatePicActivity_ [id=0x41ba5aa0]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mHandler = android.os.Handler [id=0x41c45f78]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mLock = java.lang.Object [id=0x41c7c220]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mTransport = android.database.ContentObserver$Transport [id=0x41b1a878]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: * Instance of com.prism.prism.RatePicActivity_
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   onViewChangedNotifier_ = org.androidannotations.api.view.OnViewChangedNotifier [id=0x41cceb68]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   application = com.prism.prism.MyApplication_ [id=0x41b26fe0]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   backgroundImageView = android.support.v7.widget.AppCompatImageView [id=0x41ba1960]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   fragment_container = android.widget.FrameLayout [id=0x41b6f098]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mDelegate = android.support.v7.app.AppCompatDelegateImplV14 [id=0x4226a548]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mMediaController = null
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mFragments = android.support.v4.app.FragmentController [id=0x41cd05c0]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mHandler =     android.support.v4.app.FragmentActivity$1 [id=0x41c63520]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mCreated = true
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mOptionsMenuInvalidated = false
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mReallyStopped = true
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mRequestedPermissionsFromFragment = false
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mResumed = false
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mRetaining = false
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mStopped = true
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mActionBar = null
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mActivityInfo = android.content.pm.ActivityInfo [id=0x41c6ab08]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mAllLoaderManagers = android.util.ArrayMap [id=0x41cab818]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mApplication = com.prism.prism.MyApplication_ [id=0x41b26fe0]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mWindowManager = android.view.WindowManagerImpl [id=0x41c48e60]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mWindow = com.android.internal.policy.impl.PhoneWindow [id=0x41b966a0]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mUiThread = java.lang.Thread [id=0x417e1d80]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mTranslucentCallback = null
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mComponent = android.content.ComponentName [id=0x41c76c08]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mToken = android.os.BinderProxy [id=0x41c730f8]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mContainer = android.app.Activity$1 [id=0x41cffe98]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mCurrentConfig = android.content.res.Configuration [id=0x41df0360]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mDecor = null
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mTitle = java.lang.String [id=0x41b66db8]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mDefaultKeySsb = null
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mSettingsObserver = android.app.Activity$SettingsObserver [id=0x41b22d00]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mSearchManager = null
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mEmbeddedID = null
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mResultData = null
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mParent = null
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mFragments = android.app.FragmentManagerImpl [id=0x41ed3590]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mHandler = android.os.Handler [id=0x41c45f78]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mMenuInflater = null
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mImmerseModeRunnable = android.app.Activity$3 [id=0x41cebb80]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mInstanceTracker = android.os.StrictMode$InstanceTracker [id=0x41cf0dc0]
11-14 18:05:05.330 32099-3554/? D/LeakCanary: |   mInstrumentation = android.app.Instrumentation [id=0x41b26818]
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mIntent = android.content.Intent [id=0x41b19e40]
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mLastNonConfigurationInstances = null
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mLoaderManager = null
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mManagedDialogs = null
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mMainThread = android.app.ActivityThread [id=0x41b16958]
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mManagedCursors = java.util.ArrayList [id=0x41c6d948]
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mLoadersStarted = false
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mIdent = 1103360840
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mFinished = true
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mResultCode = 0
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mEnableDefaultActionBarUp = false
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mResumed = false
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mDoReportFullyDrawn = false
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mDestroyed = true
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mStartedActivity = false
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mStopped = true
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mTemporaryPause = false
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mDefaultKeyMode = 0
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mTitleColor = 0
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mTitleReady = true
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mConfigChangeFlags = 0
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mCheckedForLoaderManager = true
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mChangingConfigurations = false
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mVisibleFromClient = true
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mVisibleFromServer = true
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mChangeCanvasToTranslucent = false
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mWindowAdded = true
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mCalled = true
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mBase = uk.co.chrisjenx.calligraphy.CalligraphyContextWrapper [id=0x41c522b8]
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mInflater = uk.co.chrisjenx.calligraphy.CalligraphyLayoutInflater [id=0x41df9618]
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mOverrideConfiguration = null
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mResources = android.content.res.XResources [id=0x41b22d80]
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mTheme = android.content.res.Resources$Theme [id=0x41c48c10]
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mThemeResource = 2131492994
11-14 18:05:05.335 32099-3554/? D/LeakCanary: |   mBase = uk.co.chrisjenx.calligraphy.CalligraphyContextWrapper [id=0x41c522b8]
11-14 18:05:05.335 32099-3554/? E/LeakCanary: Leak result dropped because we already store 7 leak traces.

I am unable to tell where the memory leak is occurring in this case. Can someone point out how to go about identifying it?

Answer 1

@shubham-chaudhary, and for this case?

11-19 11:22:09.513 9335-10345/lar21.pontotel D/LeakCanary: * Instance of android.database.ContentObserver$Transport
11-19 11:22:09.513 9335-10345/lar21.pontotel D/LeakCanary: |   mContentObserver = com.android.internal.policy.impl.PhoneWindow$SettingsObserver [id=0x130efea0]
11-19 11:22:09.513 9335-10345/lar21.pontotel D/LeakCanary: |   mDescriptor = java.lang.String [id=0x7016e998]
11-19 11:22:09.513 9335-10345/lar21.pontotel D/LeakCanary: |   mObject = -1185785128
11-19 11:22:09.513 9335-10345/lar21.pontotel D/LeakCanary: |   mOwner = android.database.ContentObserver$Transport [id=0x13172320]
11-19 11:22:09.513 9335-10345/lar21.pontotel D/LeakCanary: * Instance of com.android.internal.policy.impl.PhoneWindow$SettingsObserver
11-19 11:22:09.513 9335-10345/lar21.pontotel D/LeakCanary: |   this$0 = com.android.internal.policy.impl.PhoneWindow [id=0x12eabf80]
11-19 11:22:09.513 9335-10345/lar21.pontotel D/LeakCanary: |   mHandler = android.os.Handler [id=0x130efec0]
11-19 11:22:09.513 9335-10345/lar21.pontotel D/LeakCanary: |   mLock = java.lang.Object [id=0x130f1240]
11-19 11:22:09.513 9335-10345/lar21.pontotel D/LeakCanary: |   mTransport = android.database.ContentObserver$Transport [id=0x13172320]
11-19 11:22:09.513 9335-10345/lar21.pontotel D/LeakCanary: * Instance of com.android.internal.policy.impl.PhoneWindow

Answer 2

11-14 18:05:05.330 32099-3554/? D/LeakCanary: * com.prism.prism.RatePicActivity_ has leaked:
11-14 18:05:05.330 32099-3554/? D/LeakCanary: * GC ROOT android.database.ContentObserver$Transport.mContentObserver
11-14 18:05:05.330 32099-3554/? D/LeakCanary: * references android.app.Activity$SettingsObserver.this$0
11-14 18:05:05.330 32099-3554/? D/LeakCanary: * leaks com.prism.prism.RatePicActivity_ instance

Looking at the line three in the log above, there is a reference to settings observer in the system somewhere, which in turn contains reference to the activity.

So most probably you didn't unregister your content observer SettingsObserver. Please do something like the following:

getContentResolver().unregisterContentObserver(settingsObserverReference);

Here is the documentation for ContentResolver#unregisterContentObserver