There is 2 seperated modules:

Screenshot

How To Avoid Memory Leak?

publicstaticContextcontext;publicSampleClass(Activityactivity) {context = (Context)activity;}

Utils.doSomeLongRunningTask(getApplicationContext());SingletoneManager.getInstance(getApplicationContext());

publicclassMainActivityextendsActivity {privateclassDownloadTaskextendsThread {//do some work    }}

publicclassDownloadTaskextendsAsyncTask<Void,Void,Void> {privateWeakReference<DownloadListener>listener;publicDownloadTask(DownloadListenerlistener) {listener =newWeakReference<>(listener);    }@OverrideprotectedVoiddoInBackground(Void...params) {///do some work    }@OverrideprotectedvoidonPostExecute(VoidaVoid) {super.onPostExecute(aVoid);if (listener.get() !=null) {listener.get().onDownloadTaskDone();        }    }}}

protectedvoidonStop() {super.onStop();handler.clearAllMessages();unregisterReceivers();view =null;listener =null;}

publicIntegerautoBoxing(){Integerresult =5;returnresult;}

publicIntegerhiddenAutoBoxing(){return5;}

How to avoid Auto-Boxing:

publicintautoBoxing(){intresult =5;returnresult;}

publicinthiddenAutoBoxing(){return5;}

publicIntegerhiddenAutoBoxing(){HashMap<Integer,String>hashMap =newHashMap<>();hashMap.put(5,"Hi Android Academy");}

How to avoid Auto-Boxing in HashMap:

publicIntegernoKeyAutoBoxing(){SparseArray<String>sparseArray =newSparseArray<>();sparseArray.put(5,"Hi Android Academy");}

publicIntegernoValueAutoBoxing(){SparseIntArraysparseArray =newSparseIntArray();sparseArray.put(5,1000);}

Tools which can help you identify leaks

License

   Copyright (C) 2018 Ali Asadi   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.