title: What is android.net.ZeroBalanceHelper in Android studio and why it cause errors?
body: <p>My app is working perfectly, but there are some strange errors in stacktrace. What is android.net.ZeroBalanceHelper? I didn't even added such library in gradle, google gives no answer what it could be. These errors do not affect the functionality</p>
  
  <p>Full error log:</p>
  
  <pre><code>07-03 20:15:54.431 23575-24040/ru.pacodelavega.techno_test W/System.err: java.lang.ClassNotFoundException: android.net.ZeroBalanceHelper
  07-03 20:15:54.432 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.lang.Class.classForName(Native Method)
  07-03 20:15:54.432 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.lang.Class.forName(Class.java:324)
  07-03 20:15:54.432 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.lang.Class.forName(Class.java:285)
  07-03 20:15:54.432 23575-24040/ru.pacodelavega.techno_test W/System.err:     at com.android.okhttp.internal.http.ZeroBalanceHelperClass.getFeatureFlagValue(ZeroBalanceHelperClass.java:39)
  07-03 20:15:54.432 23575-24040/ru.pacodelavega.techno_test W/System.err:     at com.android.okhttp.internal.http.HttpEngine.followUpRequest(HttpEngine.java:1090)
  07-03 20:15:54.432 23575-24040/ru.pacodelavega.techno_test W/System.err:     at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:393)
  07-03 20:15:54.432 23575-24040/ru.pacodelavega.techno_test W/System.err:     at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:501)
  07-03 20:15:54.432 23575-24040/ru.pacodelavega.techno_test W/System.err:     at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:567)
  07-03 20:15:54.432 23575-24040/ru.pacodelavega.techno_test W/System.err:     at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:540)
  07-03 20:15:54.432 23575-24040/ru.pacodelavega.techno_test W/System.err:     at org.jsoup.helper.HttpConnection.execute(HttpConnection.java:227)
  07-03 20:15:54.432 23575-24040/ru.pacodelavega.techno_test W/System.err:     at org.jsoup.helper.HttpConnection.get(HttpConnection.java:216)
  07-03 20:15:54.432 23575-24040/ru.pacodelavega.techno_test W/System.err:     at ru.pacodelavega.techno_test.MainActivity$FindImagesTask.doInBackground(MainActivity.java:110)
  07-03 20:15:54.432 23575-24040/ru.pacodelavega.techno_test W/System.err:     at ru.pacodelavega.techno_test.MainActivity$FindImagesTask.doInBackground(MainActivity.java:95)
  07-03 20:15:54.433 23575-24040/ru.pacodelavega.techno_test W/System.err:     at android.os.AsyncTask$2.call(AsyncTask.java:295)
  07-03 20:15:54.433 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.util.concurrent.FutureTask.run(FutureTask.java:237)
  07-03 20:15:54.435 23575-24040/ru.pacodelavega.techno_test W/System.err:     at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
  07-03 20:15:54.436 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
  07-03 20:15:54.436 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
  07-03 20:15:54.436 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.lang.Thread.run(Thread.java:818)
  07-03 20:15:54.436 23575-24040/ru.pacodelavega.techno_test W/System.err: Caused by: java.lang.ClassNotFoundException: android.net.ZeroBalanceHelper
  07-03 20:15:54.436 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.lang.Class.classForName(Native Method)
  07-03 20:15:54.436 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
  07-03 20:15:54.436 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
  07-03 20:15:54.436 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
  07-03 20:15:54.437 23575-24040/ru.pacodelavega.techno_test W/System.err:    ... 19 more
  07-03 20:15:54.437 23575-24040/ru.pacodelavega.techno_test W/System.err: Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available
  07-03 20:15:55.354 23575-24040/ru.pacodelavega.techno_test W/System.err: java.lang.ClassNotFoundException: android.net.ZeroBalanceHelper
  07-03 20:15:55.355 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.lang.Class.classForName(Native Method)
  07-03 20:15:55.355 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.lang.Class.forName(Class.java:324)
  07-03 20:15:55.355 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.lang.Class.forName(Class.java:285)
  07-03 20:15:55.355 23575-24040/ru.pacodelavega.techno_test W/System.err:     at com.android.okhttp.internal.http.ZeroBalanceHelperClass.getFeatureFlagValue(ZeroBalanceHelperClass.java:39)
  07-03 20:15:55.355 23575-24040/ru.pacodelavega.techno_test W/System.err:     at com.android.okhttp.internal.http.HttpEngine.followUpRequest(HttpEngine.java:1090)
  07-03 20:15:55.355 23575-24040/ru.pacodelavega.techno_test W/System.err:     at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:393)
  07-03 20:15:55.355 23575-24040/ru.pacodelavega.techno_test W/System.err:     at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getHeaders(HttpURLConnectionImpl.java:150)
  07-03 20:15:55.355 23575-24040/ru.pacodelavega.techno_test W/System.err:     at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getHeaderField(HttpURLConnectionImpl.java:192)
  07-03 20:15:55.355 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.net.URLConnection.getContentType(URLConnection.java:325)
  07-03 20:15:55.355 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.net.URLConnection.getContent(URLConnection.java:193)
  07-03 20:15:55.355 23575-24040/ru.pacodelavega.techno_test W/System.err:     at com.android.okhttp.internal.huc.DelegatingHttpsURLConnection.getContent(DelegatingHttpsURLConnection.java:133)
  07-03 20:15:55.355 23575-24040/ru.pacodelavega.techno_test W/System.err:     at com.android.okhttp.internal.huc.HttpsURLConnectionImpl.getContent(HttpsURLConnectionImpl.java:25)
  07-03 20:15:55.355 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.net.URL.getContent(URL.java:455)
  07-03 20:15:55.355 23575-24040/ru.pacodelavega.techno_test W/System.err:     at ru.pacodelavega.techno_test.MainActivity$FindImagesTask.doInBackground(MainActivity.java:117)
  07-03 20:15:55.355 23575-24040/ru.pacodelavega.techno_test W/System.err:     at ru.pacodelavega.techno_test.MainActivity$FindImagesTask.doInBackground(MainActivity.java:95)
  07-03 20:15:55.355 23575-24040/ru.pacodelavega.techno_test W/System.err:     at android.os.AsyncTask$2.call(AsyncTask.java:295)
  07-03 20:15:55.355 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.util.concurrent.FutureTask.run(FutureTask.java:237)
  07-03 20:15:55.355 23575-24040/ru.pacodelavega.techno_test W/System.err:     at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
  07-03 20:15:55.355 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
  07-03 20:15:55.355 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
  07-03 20:15:55.355 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.lang.Thread.run(Thread.java:818)
  07-03 20:15:55.356 23575-24040/ru.pacodelavega.techno_test W/System.err: Caused by: java.lang.ClassNotFoundException: android.net.ZeroBalanceHelper
  07-03 20:15:55.356 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.lang.Class.classForName(Native Method)
  07-03 20:15:55.356 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
  07-03 20:15:55.356 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
  07-03 20:15:55.356 23575-24040/ru.pacodelavega.techno_test W/System.err:     at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
  07-03 20:15:55.356 23575-24040/ru.pacodelavega.techno_test W/System.err:    ... 21 more
  07-03 20:15:55.356 23575-24040/ru.pacodelavega.techno_test W/System.err: Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available
  07-03 20:16:04.795 23575-23575/ru.pacodelavega.techno_test V/Monotype: SetAppTypeFace- try to flip, app = ru.pacodelavega.techno_test
  07-03 20:16:04.795 23575-23575/ru.pacodelavega.techno_test V/Monotype:     Typeface getFontPathFlipFont - systemFont = default#default
  07-03 20:16:04.815 23575-23575/ru.pacodelavega.techno_test V/BoostFramework: BoostFramework() : mPerf = com.qualcomm.qti.Performance@3037676
  07-03 20:16:04.815 23575-23575/ru.pacodelavega.techno_test V/BoostFramework: BoostFramework() : mPerf = com.qualcomm.qti.Performance@bd59477
  07-03 20:16:04.823 23575-23575/ru.pacodelavega.techno_test V/BoostFramework: BoostFramework() : mPerf = com.qualcomm.qti.Performance@836a8e4
  07-03 20:16:04.824 23575-23575/ru.pacodelavega.techno_test V/BoostFramework: BoostFramework() : mPerf = com.qualcomm.qti.Performance@b13914d
  07-03 20:16:04.928 23575-23575/ru.pacodelavega.techno_test W/IInputConnectionWrapper: finishComposingText on inactive InputConnection
  07-03 20:16:42.530 23575-23575/ru.pacodelavega.techno_test V/Monotype: SetAppTypeFace- try to flip, app = ru.pacodelavega.techno_test
  07-03 20:16:42.530 23575-23575/ru.pacodelavega.techno_test V/Monotype:     Typeface getFontPathFlipFont - systemFont = default#default
  07-03 20:16:42.543 23575-23575/ru.pacodelavega.techno_test V/BoostFramework: BoostFramework() : mPerf = com.qualcomm.qti.Performance@a1cd5b0
  07-03 20:16:42.543 23575-23575/ru.pacodelavega.techno_test V/BoostFramework: BoostFramework() : mPerf = com.qualcomm.qti.Performance@d82cc29
  07-03 20:16:42.546 23575-23575/ru.pacodelavega.techno_test V/BoostFramework: BoostFramework() : mPerf = com.qualcomm.qti.Performance@b9b9bae
  07-03 20:16:42.546 23575-23575/ru.pacodelavega.techno_test V/BoostFramework: BoostFramework() : mPerf = com.qualcomm.qti.Performance@1447d4f
  07-03 20:16:42.610 23575-23575/ru.pacodelavega.techno_test W/IInputConnectionWrapper: beginBatchEdit on inactive InputConnection
  07-03 20:16:42.610 23575-23575/ru.pacodelavega.techno_test W/IInputConnectionWrapper: getSelectedText on inactive InputConnection
  07-03 20:16:42.633 23575-23575/ru.pacodelavega.techno_test W/IInputConnectionWrapper: endBatchEdit on inactive InputConnection
  07-03 20:16:42.633 23575-23575/ru.pacodelavega.techno_test W/IInputConnectionWrapper: getTextBeforeCursor on inactive InputConnection
  07-03 20:16:42.653 23575-23575/ru.pacodelavega.techno_test W/IInputConnectionWrapper: getTextAfterCursor on inactive InputConnection
  </code></pre>
  
  <p>Project code if it helps: <a href="https://github.com/pacodelavega/techno_test/" rel="nofollow">https://github.com/pacodelavega/techno_test/</a></p>