square/leakcanary

A memory leak detection library for Android.

LeakCanary 🐤

A memory leak detection library for Android.

square.github.io/leakcanary

🙏 If you like LeakCanary you can show support by starring ⭐ this repository.

License

Copyright 2015 Square, Inc.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

leakcanary's Issues

Leak in SpellCheckerSession.

I have following leak on vanilla 5.1 on Nexus 5.

In com.wheely.wheely.dev:5.1.3:1014510.
* com.wheely.app.ui.home.profile.CardActivity has leaked:
* GC ROOT android.view.textservice.SpellCheckerSession$SpellCheckerSessionListenerImpl.mHandler
* references android.view.textservice.SpellCheckerSession$1.this$0 (anonymous class extends android.os.Handler)
* references android.view.textservice.SpellCheckerSession.mSpellCheckerSessionListener
* references android.widget.SpellChecker.mTextView
* references com.paymentkit.views.InterceptEditText.mContext
* leaks com.wheely.app.ui.home.profile.CardActivity instance
D/LeakCanary( 7557):
* Reference Key: 3d9a5a01-4d51-472e-a459-717c21e1c7d1
* Device: LGE google Nexus 5 hammerhead
* Android Version: 5.1 API: 22
* Durations: watch=5027ms, gc=158ms, heap dump=2430ms, analysis=25573ms

Some Activity leaks are not found

I've got a an activity with barcode scanner. When I exit with finish(), the memory usage stay the same.

So it is probably a memory leak with the context.

createAppDefaults is not used

Looks like #30 broke excluded refs inclusion. createAppDefaults is not called anymore.

no LeakCanary#install(Application, Class<? extends AbstractAnalysisResultService>) in no-op library

Do I need to use build variant/flavor if I want to use this method?

Another framework InputMethodManager leak (Moto G 4.4.4)

LeakCanary is awesome, I love the work you guys do.

I was going to introduce some leaks intentionally to test, but found this one instead. Seems to be a Motorola-ism as AOSP KitKat doesn't have an InputMethodManager.sInstance .

In com.teslacoilsw.launcher:#materinova.30:39030.
* com.teslacoilsw.launcher.preferences.fragments.DockPreferences has leaked:
* GC ROOT static android.view.inputmethod.InputMethodManager.sInstance
* references android.view.inputmethod.InputMethodManager.mCurRootView
* references com.android.internal.policy.impl.PhoneWindow$DecorView.mContext
* references com.teslacoilsw.launcher.preferences.SettingsActivity.mDelegate
* references android.support.v7.app.AppCompatDelegateImplV11.mActionBar
* references android.support.v7.internal.app.ToolbarActionBar.mDecorToolbar
* references android.support.v7.internal.widget.ToolbarWidgetWrapper.mToolbar
* references com.teslacoilsw.launcher.widget.FontFamilyToolbar.mMenuView
* references android.support.v7.widget.ActionMenuView.mPresenter
* references android.support.v7.widget.ActionMenuPresenter.mScrapActionButtonView
* references android.widget.FrameLayout.mChildren
* references array android.view.View[].[0]
* references com.teslacoilsw.launcher.widget.TintableSwitchCompat.mOnCheckedChangeListener
* references com.teslacoilsw.launcher.preferences.fragments.DockPreferences$1.this$0 (anonymous class implements android.widget.CompoundButton$OnCheckedChangeListener)
* leaks com.teslacoilsw.launcher.preferences.fragments.DockPreferences instance

* Reference Key: dee294f0-e103-4093-8556-5b0d59cfac16
* Device: motorola motorola XT1063 titan_retuglb
* Android Version: 4.4.4 API: 19
* Durations: watch=5007ms, gc=169ms, heap dump=719ms, analysis=18455ms

Motorola system version: 21.11.23.titan_retuglb.retuglb.en.US retus

The checker service didn't wait enough time before detecting the leak

I am using ScheduledExecutorService, and start it in onResume and stop it on onPause, every time I leave the activity is shows a leak on the anonymous runnable, but since I canceled the task I think it detect the leak a bit fast before ScheduledExecutorService give away the task reference. Or am I missing something?

    public void playAnimation() {
        initAnimations();
        final Handler handler = new Handler(Looper.getMainLooper());
        ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
        mScheduledFuture = scheduler.scheduleAtFixedRate(new Runnable() {
            @Override
            public void run() {
                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        Timber.d("animate");
                        flipNextImage();
                        if (mPageIndicator != null) {
                            mPageIndicator.setOnPageChangeListener(null);
                            mPageIndicator.setCurrentItem(mSelectedImage);
                            switcherPager.setCurrentItem(mSelectedImage, true);
                            mPageIndicator.setOnPageChangeListener(onPageChangeListener);
                        } else {
                            switcherPager.setOnPageChangeListener(null);
                            switcherPager.setCurrentItem(mSelectedImage, true);
                            switcherPager.setOnPageChangeListener(onPageChangeListener);
                        }
                    }
                });

            }
        }, 0, 3, TimeUnit.SECONDS);

    }

    public void stopAnimation() {
        if (mScheduledFuture != null) {
            mScheduledFuture.cancel(true);
            mScheduledFuture = null;
        }

    }

find a leak

Make a vector version of the icon

Jaggedness. Meh.

Contributions welcome!

Let leakcanary-android-no-op minSDK = 8 to support more device.

A lot of APPs still support API Level 8. I think I would be better to support API Level 8 in leakcanary-android-no-op.

com.squareup.leakcanary.internal.DisplayLeakActivity has leaked

* com.squareup.leakcanary.internal.DisplayLeakActivity has leaked:
* GC ROOT static com.android.internal.os.ZygoteInit.mResources
* references android.content.res.Resources.mContext
* references android.app.ContextImpl.mOuterContext
* leaks com.squareup.leakcanary.internal.DisplayLeakActivity instance
* Reference Key: bd8db00d-ce02-4f73-97fe-4bd36c65502f
* Device: samsung samsung GT-I9500 ja3gub
* Android Version: 4.4.2 API: 19
* Durations: watch=5015ms, gc=145ms, heap dump=543ms, analysis=13738ms

App Stop Running while uninstalling

E/AndroidRuntime( 8237): FATAL EXCEPTION: IntentService[HeapAnalyzerService]
E/AndroidRuntime( 8237): Process: com.meizu.flyme.update:leakcanary, PID: 8237
E/AndroidRuntime( 8237): java.lang.NullPointerException: Attempt to get length of null array
E/AndroidRuntime( 8237):    at com.squareup.leakcanary.HeapAnalyzer.cleanup(HeapAnalyzer.java:340)
E/AndroidRuntime( 8237):    at com.squareup.leakcanary.HeapAnalyzer.checkForLeak(HeapAnalyzer.java:109)
E/AndroidRuntime( 8237):    at com.squareup.leakcanary.internal.HeapAnalyzerService.onHandleIntent(HeapAnalyzerService.java:56)
E/AndroidRuntime( 8237):    at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)
E/AndroidRuntime( 8237):    at android.os.Handler.dispatchMessage(Handler.java:102)
E/AndroidRuntime( 8237):    at android.os.Looper.loop(Looper.java:135)
E/AndroidRuntime( 8237):    at android.os.HandlerThread.run(HandlerThread.java:61)

Create a Resources section or page

A few links that we could include:

• Square Corner article: http://squ.re/leakcanary
• Wrangling Dalvik series: http://www.raizlabs.com/dev/2014/03/wrangling-dalvik-memory-management-in-android-part-1-of-2/
• Upload leak trace to Slack / HipChat: https://gist.github.com/pyricau/06c2c486d24f5f85f7f0
• Dump the heap on OOM errors: https://gist.github.com/pyricau/4726389fd64f3b7c6f32
• Chinese version of the readme 中文版说明
• Chinese leak demo: https://github.com/liaohuqiu/leakcanary-demo

Generate Apk

I have 3 buildType on my project, debug, staging and release. I suppose that debug and staging is loaded as debug types, not release, so when I generate a staging apk it will use debugCompile option.
So I have:

debugCompile 'com.squareup.leakcanary:leakcanary-android:1.3'
releaseCompile 'com.squareup.leakcanary:leakcanary-android-no-op:1.3'

And I try go generate my signed apk for staging buildType and it says:
Error:(12, 31) error: package com.squareup.leakcanary does not exist
Error:Execution failed for task ':app:compileStagingJava'.
> Compilation failed; see the compiler error output for details.

But if I use
compile 'com.squareup.leakcanary:leakcanary-android:1.3'

it generate my apk... what can I do?

ShareActionProvider leaks context

Looking at the code in SharedActionProvider:

private void setActivityChooserPolicyIfNeeded() {
        if (mOnShareTargetSelectedListener == null) {
            return;
        }
        if (mOnChooseActivityListener == null) {
            mOnChooseActivityListener = new ShareActivityChooserModelPolicy();
        }
        ActivityChooserModel dataModel = ActivityChooserModel.get(mContext, mShareHistoryFileName);
        dataModel.setOnChooseActivityListener(mOnChooseActivityListener);
    }

This creates an inner class, which holds a reference to the context. That is registered with the dataModel which is in sDataModelRegistry.

D/LeakCanary(18907): * no.finn.android.ui.homepage.HomeActivity has leaked:
D/LeakCanary(18907): * GC ROOT static android.widget.ActivityChooserModel.sDataModelRegistry
D/LeakCanary(18907): * references java.util.HashMap.table
D/LeakCanary(18907): * references array java.util.HashMap$HashMapEntry[].[1]
D/LeakCanary(18907): * references java.util.HashMap$HashMapEntry.value
D/LeakCanary(18907): * references android.widget.ActivityChooserModel.mActivityChoserModelPolicy
D/LeakCanary(18907): * references android.widget.ShareActionProvider$ShareAcitivityChooserModelPolicy.this$0
D/LeakCanary(18907): * references android.widget.ShareActionProvider.mContext
D/LeakCanary(18907): * references android.view.ContextThemeWrapper.mBase
D/LeakCanary(18907): * leaks no.finn.android.ui.homepage.HomeActivity instance

We use the following hack to avoid the problem:

ActivityChooserModel dataModel = ActivityChooserModel.get(context, ShareActionProvider.DEFAULT_SHARE_HISTORY_FILE_NAME);
        dataModel.setOnChooseActivityListener(new ActivityChooserModel.OnChooseActivityListener() {
            @Override
            public boolean onChooseActivity(ActivityChooserModel host, Intent intent) {
                return false;
            }
        });

NB : Sending in null on setOnChooseActivityListener will work on SOME sdk versions.

ContentResolver StatusChangeListener leak

    * (...)Activity has leaked:
    * GC ROOT android.content.ContentResolver$1.val$callback (anonymous class extends android.content.ISyncStatusObserver$Stub)
    * references (...)Presenter.(...)Activity
    * leaks (...)Activity instance
    * Reference Key: a839032d-e812-4601-8703-4d068ff3e9fb
    * Device: LGE google Nexus 5 hammerhead
    * Android Version: 5.1 API: 22 LeakCanary: 1.3.1-SNAPSHOT
    * Durations: watch=5019ms, gc=195ms, heap dump=1925ms, analysis=17520ms

All I do is:

public class Presenter {

    public void onResume() {
        final int mask = ContentResolver.SYNC_OBSERVER_TYPE_PENDING | ContentResolver.SYNC_OBSERVER_TYPE_ACTIVE;
        syncObserverHandle = ContentResolver.addStatusChangeListener(mask, this);
    }

    public void onPause() {
        ContentResolver.removeStatusChangeListener(syncObserverHandle);
        syncObserverHandle = null;
    }
}

Presenter class has its Activity reference. Injection is done with Dagger 2, and component which keeps Presenter reference is set to null in onDestroy() method.

Request: allow to send the OOM details to the Play Store when the app crashes

Each time there is an OOM that caused the app to crash, I'd like that this additional information would be added to the report that's sent to the Play Store.

Is it possible?
Also, I've noticed that there are multiple steps that occur when there is OOM. Are they fast enough for this? If not, is there a way to make it do it all work faster just for this task?

I think that for my use-case, using the Play Store for OOM crash reporting is enough.

HandlerThread from android.widget.Filter seems to leak the filter which leaks the adapter

I got a couple of similar reports like this (real device)

* de.busliniensuche.android.MainActivity has leaked:
    * GC ROOT thread android.os.HandlerThread.<Java Local> (named 'Filter')
    * references android.os.MessageQueue.mMessages
    * references android.os.Message.target
    * references android.widget.Filter$RequestHandler.this$0
    * references de.busliniensuche.android.view.StationSearchListAdapter$StationSearchFilter.stationSearchListAdapter
    * references de.busliniensuche.android.view.StationSearchListAdapter.animListView
    * references de.busliniensuche.android.view.AnimationListView.mContext
    * leaks de.busliniensuche.android.MainActivity instance
    * Reference Key: ae18be53-5a9d-4358-a7d5-479f38fa6c90
    * Device: LGE google Nexus 4 occam
    * Android Version: 5.1.1 API: 22
    * Durations: watch=5194ms, gc=277ms, heap dump=8276ms, analysis=42454ms

or this (Genymotion)

 * de.busliniensuche.android.StationSearchFragment has leaked:
    * GC ROOT thread android.os.HandlerThread.<Java Local> (named 'Filter')
    * references android.os.MessageQueue.mMessages
    * references android.os.Message.target
    * references android.widget.Filter$RequestHandler.this$0
    * references de.busliniensuche.android.view.StationSearchListAdapter$StationSearchFilter.stationSearchListAdapter
    * references de.busliniensuche.android.view.StationSearchListAdapter.listener
    * leaks de.busliniensuche.android.StationSearchFragment instance
    * Reference Key: f4768f4c-452d-40cc-936a-efa2282dda06
    * Device: Genymotion generic Google Nexus 4 - 5.1.0 - API 22 - 768x1280 vbox86p
    * Android Version: 5.1 API: 22
    * Durations: watch=5035ms, gc=127ms, heap dump=574ms, analysis=7063ms

As far as I can tell, the root issue is the leak of StationSearchFilter which holds a reference to the adapter which in turn leaks all kinds of stuff.

Now, I can't figur out what exactly is causing the leak. It seems the HandlerThread that is started in Filter.filter isn't properly closed and therefore leaks a message.

java.lang.ExceptionInInitializerError Caused by: java.lang.NullPointerException: in == null at java.util.Properties.load(Properties.java:246)

I tried adding leak canary to our app and we get this crash:

java.lang.ExceptionInInitializerError
  at org.eclipse.mat.hprof.HprofIndexBuilder.fill(HprofIndexBuilder.java:54)
  at org.eclipse.mat.parser.internal.SnapshotFactory.parse(SnapshotFactory.java:193)
  at org.eclipse.mat.parser.internal.SnapshotFactory.openSnapshot(SnapshotFactory.java:106)
  at com.squareup.leakcanary.HeapAnalyzer.openSnapshot(HeapAnalyzer.java:134)
  at com.squareup.leakcanary.HeapAnalyzer.checkForLeak(HeapAnalyzer.java:87)
  at com.squareup.leakcanary.internal.HeapAnalyzerService.onHandleIntent(HeapAnalyzerService.java:56)
  at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)
  at android.os.Handler.dispatchMessage(Handler.java:102)
  at android.os.Looper.loop(Looper.java:145)
  at android.os.HandlerThread.run(HandlerThread.java:61)
Caused by: java.lang.NullPointerException: in == null
  at java.util.Properties.load(Properties.java:246)
  at org.eclipse.mat.util.MessageUtil.(MessageUtil.java:28)
  at org.eclipse.mat.util.MessageUtil.(MessageUtil.java:13)
  ... 10 more

How to use leakcanary in eclipse?

Hi!

leakcanary is very good! How to use leakcanary in eclipse?

Setup Travis for PRs

@JakeWharton @loganj what are the steps?

dependency inclusion mentioned in README.md fails

I add as the README shows:

 dependencies {
   debugCompile 'com.squareup.leakcanary:leakcanary-android:1.3'
   releaseCompile 'com.squareup.leakcanary:leakcanary-android-no-op:1.3'
 }

But it results in:

Error:(73, 20) Failed to resolve: com.squareup.leakcanary:leakcanary-android-no-op:1.3
Error:(72, 18) Failed to resolve: com.squareup.leakcanary:leakcanary-android:1.3

Repository configuration:

allprojects {
    repositories {
        jcenter()
    }
}

Thank you!

Write a Java only sample

Heap dump: https://blogs.oracle.com/sundararajan/entry/programmatically_dumping_heap_from_java

ClipboardUIManager memory leak on Samsung

Samsung Galaxy S Edge. Same to the one defined here:
https://github.com/square/leakcanary/blob/master/library/leakcanary-android/src/main/java/com/squareup/leakcanary/AndroidExcludedRefs.java

but with different variable name, here is the trace:

com.opensooq.OpenSooq.ui.login.RegistrationActivity has leaked:
* GC ROOT android.view.Choreographer$FrameDisplayEventReceiver.mMessageQueue
* references android.os.MessageQueue.mMessages
* references android.os.Message.next
* references android.os.Message.callback
* references android.widget.Editor$Blink.this$0
* references android.widget.Editor.mTextView
* references android.support.v7.widget.AppCompatAutoCompleteTextView.mClipboardExManager
* references android.sec.clipboard.ClipboardExManager.mClipboardUIManager
* references android.sec.clipboard.ClipboardUIManager.mContext
* leaks com.opensooq.OpenSooq.ui.login.RegistrationActivity instance* Reference Key: 898151f2-829a-4242-b074-a53cc88cce8d
* Device: samsung samsung SM-G925F zeroltexx
* Android Version: 5.0.2 API: 21
* Durations: watch=5015ms, gc=167ms, heap dump=2782ms, analysis=28642ms 

Add API to add ExcludedRefs

We have the AndroidExcludedRefs which is nice. But please add an API to define our own excludes.

Writes to disk on main thread

Android's Strict mode detected a disk write with the following stack trace:

05-12 07:48:03.093    9989-9989/? D/StrictMode﹕ StrictMode policy violation; ~duration=98 ms: android.os.StrictMode$StrictModeDiskWriteViolation: policy=341 violation=1
            at android.os.StrictMode$AndroidBlockGuardPolicy.onWriteToDisk(StrictMode.java:1111)
            at libcore.io.BlockGuardOs.mkdir(BlockGuardOs.java:172)
            at java.io.File.mkdirErrno(File.java:874)
            at java.io.File.mkdirs(File.java:898)
            at java.io.File.mkdirs(File.java:892)
            at com.android.server.pm.Settings.writePackageRestrictionsLPr(Settings.java:1277)
            at com.android.server.pm.PackageManagerService.setEnabledSetting(PackageManagerService.java:12201)
            at com.android.server.pm.PackageManagerService.setComponentEnabledSetting(PackageManagerService.java:12109)
            at android.content.pm.IPackageManager$Stub.onTransact(IPackageManager.java:1219)
            at com.android.server.pm.PackageManagerService.onTransact(PackageManagerService.java:1862)
            at android.os.Binder.execTransact(Binder.java:446)
    # via Binder call with stack:
    android.os.StrictMode$LogStackTrace
            at android.os.StrictMode.readAndHandleBinderCallViolations(StrictMode.java:1717)
            at android.os.Parcel.readExceptionCode(Parcel.java:1527)
            at android.os.Parcel.readException(Parcel.java:1496)
            at android.content.pm.IPackageManager$Stub$Proxy.setComponentEnabledSetting(IPackageManager.java:3394)
            at android.app.ApplicationPackageManager.setComponentEnabledSetting(ApplicationPackageManager.java:1489)
            at com.squareup.leakcanary.LeakCanary.setEnabled(LeakCanary.java:195)
            at com.squareup.leakcanary.LeakCanary.enableDisplayLeakActivity(LeakCanary.java:75)
            at com.squareup.leakcanary.LeakCanary.install(LeakCanary.java:55)
            at com.squareup.leakcanary.LeakCanary.install(LeakCanary.java:43)
            at various.App.onCreate(App.java:44)
            at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1012)
            at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4553)
            at android.app.ActivityThread.access$1500(ActivityThread.java:151)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1364)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5254)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

"java.lang.StackOverflowError" in HeapAnalyzerService

I met an err "java.lang.StackOverflowError" in HeapAnalyzerService.

Crashes with ArrayIndexOutOfBoundsException

I notice this crash coming up a lot. I get a message that my app has crashed but it remains running.

FATAL EXCEPTION: IntentService[HeapAnalyzerService]
java.lang.ArrayIndexOutOfBoundsException: length=335831; index=-54100
    at org.eclipse.mat.parser.index.IndexWriter$IntArray1NWriter.set(IndexWriter.java:608)
    at org.eclipse.mat.parser.index.IndexWriter$IntArray1NWriter.log(IndexWriter.java:590)
    at org.eclipse.mat.hprof.HprofParserHandlerImpl.addObject(HprofParserHandlerImpl.java:442)
    at org.eclipse.mat.hprof.Pass2Parser.readInstanceDump(Pass2Parser.java:270)
    at org.eclipse.mat.hprof.Pass2Parser.readDumpSegments(Pass2Parser.java:158)
    at org.eclipse.mat.hprof.Pass2Parser.read(Pass2Parser.java:90)
    at org.eclipse.mat.hprof.HprofIndexBuilder.fill(HprofIndexBuilder.java:80)
    at org.eclipse.mat.parser.internal.SnapshotFactory.parse(SnapshotFactory.java:193)
    at org.eclipse.mat.parser.internal.SnapshotFactory.openSnapshot(SnapshotFactory.java:106)
    at com.squareup.leakcanary.HeapAnalyzer.openSnapshot(HeapAnalyzer.java:134)
    at com.squareup.leakcanary.HeapAnalyzer.checkForLeak(HeapAnalyzer.java:87)
    at com.squareup.leakcanary.internal.HeapAnalyzerService.onHandleIntent(HeapAnalyzerService.java:56)
    at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:137)
    at android.os.HandlerThread.run(HandlerThread.java:61)

Leak in MediaScannerConnection

In com.fastebro.androidrgbtool:1.5.0:10.
* com.fastebro.androidrgbtool.ui.MainActivity has leaked:
* GC ROOT android.media.MediaScannerConnection$1.this$0 (anonymous class extends android.media.IMediaScannerListener$Stub)
* references android.media.MediaScannerConnection.mContext
* leaks com.fastebro.androidrgbtool.ui.MainActivity instance

* Reference Key: b9ba263e-f5ce-4117-bfa5-23f921e13052
* Device: motorola google Nexus 6 shamu
* Android Version: 5.1 API: 22
* Durations: watch=5048ms, gc=153ms, heap dump=1707ms, analysis=15593ms

My code simply call the scanFile like the ExternalStorage official APIs demo.
Found it while testing my app but I'm not able to reproduce it systematically.

How can I use leakcanary on eclipse?

I try to use eclipse replace gradle. It doesn't work. There are some problem block me.
05-11 17:36:01.631: D/AndroidHeapDumper(15195): Could not dump heap, previous analysis still is in progress.
05-11 17:45:33.151: W/dalvikvm(16376): Exception Ljava/lang/NullPointerException; thrown while initializing Lorg/eclipse/mat/util/MessageUtil;

StrictMode disk access violation

With StrictMode fully enabled:

StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
        .detectAll()
        .penaltyLog()
        .penaltyDeath()
        .build());
StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()
        .detectAll()
        .penaltyLog()
        .penaltyDeath()
        .build());

I'm getting a crash on launch when calling LeakCanary.install(this);

StrictMode  D  StrictMode policy violation; ~duration=8 ms: android.os.StrictMode$StrictModeDiskReadViolation: policy=95 violation=2
            D      at android.os.StrictMode$AndroidBlockGuardPolicy.onReadFromDisk(StrictMode.java:1137)
            D      at libcore.io.BlockGuardOs.access(BlockGuardOs.java:67)
            D      at java.io.File.doAccess(File.java:283)
            D      at java.io.File.exists(File.java:363)
            D      at android.app.ContextImpl.createFilesDirLocked(ContextImpl.java:997)
            D      at android.app.ContextImpl.getFilesDir(ContextImpl.java:1020)
            D      at android.content.ContextWrapper.getFilesDir(ContextWrapper.java:201)
            D      at com.squareup.leakcanary.AndroidHeapDumper.<init>(AndroidHeapDumper.java:29)
            D      at com.squareup.leakcanary.LeakCanary.androidWatcher(LeakCanary.java:68)
            D      at com.squareup.leakcanary.LeakCanary.install(LeakCanary.java:58)
            D      at com.squareup.leakcanary.LeakCanary.install(LeakCanary.java:43)
            D      at com.robinhood.android.App.onCreate(App.java:56)
            D      at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1011)
            D      at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4518)
            D      at android.app.ActivityThread.access$1500(ActivityThread.java:144)
            D      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1339)
            D      at android.os.Handler.dispatchMessage(Handler.java:102)
            D      at android.os.Looper.loop(Looper.java:135)
            D      at android.app.ActivityThread.main(ActivityThread.java:5221)
            D      at java.lang.reflect.Method.invoke(Native Method)
            D      at java.lang.reflect.Method.invoke(Method.java:372)
            D      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
            D      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
AndroidRuntime  D  Shutting down VM

Calling LeakCanary.install() on a background thread fixes the issue, just thought it may be worth addressing in the lib (or in the readme) since others may also have StrictMode fully enabled for debug builds.

Add LeakCanary version to leak info

Replace this:

* Android Version: 5.0.2 API: 21

with this:

Android Version: 5.0.2 API: 21 LeakCanary: 1.3.1

Leak in UserManager

Leak is the following one :

In com.jeuxvideo:3.0-debug:56.

• com.jeuxvideo.ui.activity.BlockActivity has leaked:
• GC ROOT static android.os.UserManager.sInstance
• references android.os.UserManager.mContext
• references android.app.ContextImpl.mOuterContext
• leaks com.jeuxvideo.ui.activity.BlockActivity instance
• Reference Key: 6d26c0d6-9b26-453c-9f99-917f7ef23896
• Device: LGE google Nexus 4 occam
• Android Version: 5.0 API: 21
• Durations: watch=5100ms, gc=242ms, heap dump=8939ms, analysis=42898ms

I think this happened after I came back from sharing a content.

Unable to share Heap Dump

1. Install the sample application
2. Cause a memory leak as per instruction
3. View the Leak report and Share Heap Dump
4. Choose any 3rd Party app such as Gmail; Gmail will toast Permission denied for the attachment

Memory Leak on a Fragment Instance

I received this memory leak and not sure how to track down what is causing it. Any ideas?

05-09 09:32:14.731  28497-31220/? D/LeakCanary﹕ In com.etiennelawlor.minesweeper:0.0.21:21.
    * com.etiennelawlor.minesweeper.fragments.MinesweeperFragment has leaked:
    * GC ROOT com.google.android.gms.games.internal.GamesClientImpl$PopupLocationInfoBinderCallbacks.zzahO
    * references com.google.android.gms.games.internal.PopupManager$PopupManagerHCMR1.zzajo
    * references com.google.android.gms.games.internal.GamesClientImpl.mContext
    * references com.etiennelawlor.minesweeper.activities.MinesweeperActivity.mFragments
    * references android.app.FragmentManagerImpl.mAdded
    * references java.util.ArrayList.array
    * references array java.lang.Object[].[0]
    * leaks com.etiennelawlor.minesweeper.fragments.MinesweeperFragment instance
    * Reference Key: 2f367393-6dfd-4797-8d85-7ac52c431d07
    * Device: LGE google Nexus 5 hammerhead
    * Android Version: 5.1 API: 22
    * Durations: watch=5015ms, gc=141ms, heap dump=1978ms, analysis=23484ms

Add more state info to LeakTrace

The leak trace string representation is nice because it makes it easy to point to the problem and identify a few key references that should not exist.

However, when trying to understand why a reference still exists, we sometimes need more info from the heap dump. It's fairly easy to do so in MAT.

However, it might be useful to create a shorcut by providing the state information (instance fields) for each of the reference in the chain. ie for each of those fields, give the type & memory address.

That would be something separate from the leak trace string, ie available as fields in it and maybe through a toDetailedString() method. We might want leakInfo() to include that as well.

After I use this library for my app App Storage using too much, such as 1.5GB

I am not sure why this happen to me. But, I faced it and still.

Also, whenever I got this log, the main thread stopped 300ms~1000ms.
I/art﹕ hprof: heap dump "/data/data/com.app/files/suspected_leak_heapdump.hprof" starting...

on Galaxy S6

How can I show the leak like screenshot

I just see leak log,can show me like screenshot?

Initial notification when generating Heap Dump

Creating and processing a Heap Dump does freeze UI for a significant amount of time for large heap dumps.
It's 8 seconds for me during which the application is unresponsive.
Of course the users won't be affected by that but our QA will.

Do you think it is a good idea to show a Toast (or any other notification) when you start the process. Will make users more aware why app is unresponsive.

Compile problem with the demo

It's embarrassed to say that I got a runtime problem which looks like this:

    Process: com.example.leakcanary, PID: 5644
    java.lang.RuntimeException: Unable to create application com.example.leakcanary.ExampleApplication: java.lang.IllegalArgumentException: Component class com.squareup.leakcanary.internal.DisplayLeakActivity does not exist in com.example.leakcanary
            at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4375)
            at android.app.ActivityThread.access$1500(ActivityThread.java:141)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1262)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5047)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:609)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.IllegalArgumentException: Component class com.squareup.leakcanary.internal.DisplayLeakActivity does not exist in com.example.leakcanary
            at android.os.Parcel.readException(Parcel.java:1476)
            at android.os.Parcel.readException(Parcel.java:1426)
            at android.content.pm.IPackageManager$Stub$Proxy.setComponentEnabledSetting(IPackageManager.java:2943)
            at android.app.ApplicationPackageManager.setComponentEnabledSetting(ApplicationPackageManager.java:1285)
            at com.squareup.leakcanary.LeakCanary.setEnabled(LeakCanary.java:195)
            at com.squareup.leakcanary.LeakCanary.enableDisplayLeakActivity(LeakCanary.java:75)
            at com.squareup.leakcanary.LeakCanary.install(LeakCanary.java:55)
            at com.squareup.leakcanary.LeakCanary.install(LeakCanary.java:43)
            at com.example.leakcanary.ExampleApplication.onCreate(ExampleApplication.java:34)
            at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1007)
            at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4372)
            at android.app.ActivityThread.access$1500(ActivityThread.java:141)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1262)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5047)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:609)
            at dalvik.system.NativeStart.main(Native Method)

Could you give me some advice? Thank you.

Errors in log

I keep seeing this come up in the log when trying to find a memory leak.
Is this normal?

* FAILURE:
    org.eclipse.mat.SnapshotException: SnapshotFactoryImpl_Error_NoParserRegistered
            at org.eclipse.mat.parser.internal.SnapshotFactory.parse(SnapshotFactory.java:220)
            at org.eclipse.mat.parser.internal.SnapshotFactory.openSnapshot(SnapshotFactory.java:106)
            at com.squareup.leakcanary.HeapAnalyzer.openSnapshot(HeapAnalyzer.java:134)
            at com.squareup.leakcanary.HeapAnalyzer.checkForLeak(HeapAnalyzer.java:87)
            at com.squareup.leakcanary.internal.HeapAnalyzerService.onHandleIntent(HeapAnalyzerService.java:56)
            at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:137)
            at android.os.HandlerThread.run(HandlerThread.java:61)
    * Reference Key: dded0520-39d7-411c-99d1-6f8096f381ce
    * Device: samsung samsung SAMSUNG-SM-N900A hlteuc
    * Android Version: 4.3 API: 18
    * Durations: watch=5026ms, gc=252ms, heap dump=1224ms, analysis=4627ms
* FAILURE:
    java.lang.IllegalArgumentException: File does not exist: /data/data/com.myapp.testing/files/suspected_leak_heapdump.hprof
            at com.squareup.leakcanary.HeapAnalyzer.checkForLeak(HeapAnalyzer.java:81)
            at com.squareup.leakcanary.internal.HeapAnalyzerService.onHandleIntent(HeapAnalyzerService.java:56)
            at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:137)
            at android.os.HandlerThread.run(HandlerThread.java:61)
    * Reference Key: 538bc49d-b79e-4357-a331-3b302b0008e0
    * Device: samsung samsung SAMSUNG-SM-N900A hlteuc
    * Android Version: 4.3 API: 18
    * Durations: watch=5029ms, gc=221ms, heap dump=1196ms, analysis=0ms

ApplicationThread leaks Service instance

In com.example.android_alpha.app:1.0:1.
* com.kiwiwearables.kiwilib.KiwiService has leaked:
* GC ROOT android.app.ActivityThread$ApplicationThread.this$0
* references android.app.ActivityThread.mServices
* references android.util.ArrayMap.mArray
* references array java.lang.Object[].[3]
* leaks com.kiwiwearables.kiwilib.KiwiService instance

* Reference Key: 599ac81b-d683-4f07-8a83-e840119982ed
* Device: LGE google Nexus 5 hammerhead
* Android Version: 5.1 API: 22
* Durations: watch=5639ms, gc=208ms, heap dump=3528ms, analysis=37676ms

Running Espresso Test on Api <= 19 Fails.

When running a Espresso test using AndroidJunitTestRunner The tests start fine on sdks for android 5.5 but running the same test on Api < 19 fails in the call to install.

05-12 17:41:29.640    2017-2017/? E/MonitoringInstrumentation﹕ Dying now...
05-12 17:41:29.640    2017-2017/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: nz.org.winters.android.nzmobileaccountwidget, PID: 2017
    java.lang.NoClassDefFoundError: com.squareup.leakcanary.ServiceHeapDumpListener
            at com.squareup.leakcanary.LeakCanary.install(LeakCanary.java:56)
            at com.squareup.leakcanary.LeakCanary.install(LeakCanary.java:43)
            at nz.org.winters.android.nzmobileaccountwidget.CrashAppWrapper.onCreate(CrashAppWrapper.java:106)

Add a Troubleshooting section to the readme

• "error: package com.squareup.leakcanary does not exist" => additional build targets
• Clean if errors after adding it, because Android Studio.

Others?

Assistance diagnosing leak?

05-09 12:56:56.174  18379-19786/com.b.kD/LeakCanary﹕ In com.b.k:1.4.4.7:57.
* com.b.k.Add_User has leaked:
* GC ROOT android.app.LoadedApk$ServiceDispatcher$DeathMonitor.this$0
* references android.app.LoadedApk$ServiceDispatcher.mConnection
* references com.android.vending.billing.util.IabHelper$1.val$listener (anonymous class implements android.content.ServiceConnection)
* references com.b.k.Add_User$5.this$0 (anonymous class implements com.android.vending.billing.util.IabHelper$OnIabSetupFinishedListener)
* leaks com.b.k.Add_User instance
* Reference Key: c06d2f1f-b1ad-4419-b17b-d9d0e0eb10f7
* Device: Genymotion generic Google Nexus 4 - 4.2.2 - API 17 - 768x1280 vbox86p
* Android Version: 4.2.2 API: 17
* Durations: watch=5006ms, gc=107ms, heap dump=153ms, analysis=4607ms

Just want to say, this library is a godsend, the problem i'm having however is actually discerning the location/cause of the leak? Which line should i be focussing on in order to find the culprit here?

It almost looks as if its coming from Google's IAB helpers?

Thanks!

Library leakcanary-android-1.3 is not in list of external libraries

I have a project with lots of dependencies.
When I add

 dependencies {
   debugCompile 'com.squareup.leakcanary:leakcanary-android:1.3'
   releaseCompile 'com.squareup.leakcanary:leakcanary-android-no-op:1.3'
 }

to main build.gradle, leakcanary-android is not in list of external libraries after gradle sync, although leakcanary-analyzer and leakcanary-watcher are there.
See screenshot:

On a blank project however everything works fine:

HeapAnalyzerService keep crashing with StackOverflow

I'm keep getting this error:

05-12 06:37:46.779 16807-16836/? E/AndroidRuntime﹕ FATAL EXCEPTION: IntentService[HeapAnalyzerService]
java.lang.StackOverflowError
at java.io.ObjectOutputStream.dumpCycle(ObjectOutputStream.java:425)
at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1566)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481)
at java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:979)
at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:368)
at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1074)
at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1404)
at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1671)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481)
at java.io.ObjectOutputStream.writeNewArray(ObjectOutputStream.java:1205)
at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1662)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481)
at java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:979)
at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:368)
at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1074)
at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1404)
at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1671)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481)
at java.util.ArrayList.writeObject(ArrayList.java:648)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1053)
at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1404)
at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1671)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481)
at java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:979)
at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:368)
at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1074)
at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1404)
at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1671)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481)
at java.util.ArrayList.writeObject(ArrayList.java:648)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1053)
at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1404)
at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1671)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481)
at java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:979)
at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:368)
at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1074)
at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1404)
at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1671)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481)
at java.util.ArrayList.writeObject(ArrayList.java:648)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(

I have it installed in Application and added watcher for Fragment.onDestroy.

ActionBar leaks

Hi,
When getting a reference to android.support.v7.app.ActionBar (i.e. actionBar = getSupportActionBar();), looks like the Object leaks :

• android.support.v7.internal.app.WindowDecorActionBar has leaked:
• GC ROOT static android.app.ActivityThread.sCurrentActivityThread
• references android.app.ActivityThread.mActivities
• references android.util.ArrayMap.mArray
• references array java.lang.Object[].[3]
• references android.app.ActivityThread$ActivityClientRecord.activity
• references com.dummy.demo.activity.HomeActivity.mDelegate
• references android.support.v7.app.ActionBarActivityDelegateHC.mActionBar
• leaks android.support.v7.internal.app.WindowDecorActionBar instance
• Reference Key: 2da7d526-6ff2-46a9-acc2-143896224525
• Device: asus google Nexus 7 razorg
• Android Version: 4.4.4 API: 19

It was possible to reproduce the same issue for the following devices :

• asus google Nexus 7 razorg (Android Version: 4.4.4 API: 19)
• LGE google Nexus 5 hammerhead (Android Version: 5.0 API: 21)
• samsung samsung GT-I8160 GT-I8160 (Android Version: 4.1.2 API: 16)
• motorola motorola XT1032 falcon_retde (Android Version: 4.3 API: 18)

AudioManager leak (samsung)

org.lakedaemon.android.activity.RxWordActivity has leaked:
* GC ROOT static android.media.AudioManager.mContext_static
* references android.app.ContextImpl.mOuterContext
* leaks org.lakedaemon.android.activity.RxWordActivity instance
* Reference Key: 4ab479ea-2267-4b99-b384-767157abf988
* Device: samsung samsung GT-I9305 m3xx
* Android Version: 4.4.4 API: 19
* Durations: watch=5021ms, gc=161ms, heap dump=695ms, analysis=24326ms

I'll post a heap dump as soon as I figure out where to find it/how to do it

java.lang.StackOverflowError on HeapAnalyzerService

After navigating a while through my app I got a StackOverFlowError...

        AndroidRuntime  E  FATAL EXCEPTION: IntentService[HeapAnalyzerService]
                        E  Process: com.weheartit:leakcanary, PID: 14442
                        E  java.lang.StackOverflowError
                        E      at java.io.BufferedOutputStream.write(BufferedOutputStream.java:135)
                        E      at java.io.DataOutputStream.writeInt(DataOutputStream.java:180)
                        E      at java.io.ObjectOutputStream.writeCyclicReference(ObjectOutputStream.java:812)
                        E      at java.io.ObjectOutputStream.dumpCycle(ObjectOutputStream.java:427)
                        E      at java.io.ObjectOutputStream.writeClassDesc(ObjectOutputStream.java:754)
                        E      at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1369)
                        E      at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1671)
                        E      at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517)
                        E      at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481)
                        E      at java.io.ObjectOutputStream.writeNewArray(ObjectOutputStream.java:1205)
                        E      at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1662)
                        E      at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517)
                        E      at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481)
                        E      at java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:979)
                        E      at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:368)
                        E      at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1074)
                        E      at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1404)
                        E      at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1671)
                        E      at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517)
                        E      at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481)
                        E      at java.util.ArrayList.writeObject(ArrayList.java:648)
                        E      at java.lang.reflect.Method.invokeNative(Native Method)
                        E      at java.lang.reflect.Method.invoke(Method.java:515)
                        E      at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1053)
                        E      at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1404)
                        E      at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1671)
                        E      at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517)
                        E      at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481)
                        E      at java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:979)
                        E      at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:368)
                        E      at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1074)
                        E      at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1404)
                        E      at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1671)
                        E      at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517)
                        E      at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481)
                        E      at java.util.ArrayList.writeObject(ArrayList.java:648)
                        E      at java.lang.reflect.Method.invokeNative(Native Method)
                        E      at java.lang.reflect.Method.invoke(Method.java:515)
                        E      at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1053)
                        E      at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1404)
                        E      at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1671)
                        E      at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517)
                        E      at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481)
                        E      at java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:979)
                        E      at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:368)
                        E      at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1074)
                        E      at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1404)
                        E      at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1671)
                        E      at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517)
                        E      at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481)
                        E      at java.util.ArrayList.writeObject(ArrayList.java:648)
                        E      at java.lang.reflect.Method.invokeNative(Native Method)
                        E      at java.lang.reflect.Method.invoke(Method.java:515)
                        E      at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1053)
                        E      at java.io.ObjectOutputStrea

Failed to resolve: com.squareup.leakcanary:leakcanary

When I use leakcanaryin my project, i get these errors:

Error:(19, 20) Failed to resolve: com.squareup.leakcanary:leakcanary-android-no-op:1.3
Error:(18, 18) Failed to resolve: com.squareup.leakcanary:leakcanary-android:1.3

How to solve these errors?