title: Crashlytics crash report mentions XposedBridge
body: <p>I released an update to an Android app yesterday, and today I am seeing a few crash logs in Crashlytics:</p>
  
  <pre><code>   Fatal Exception: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myapp/com.example.myapp.MyWebViewActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2665)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
            at android.app.ActivityThread.-wrap12(ActivityThread.java)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:154)
            at android.app.ActivityThread.main(ActivityThread.java:6119)
            at java.lang.reflect.Method.invoke(Method.java)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
            at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:107)
  
     Caused by java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference
            at com.example.myapp.MyWebViewActivity.onCreate(MyWebViewActivity.java:77)
            at android.app.Activity.performCreate(Activity.java:6679)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2618)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
            at android.app.ActivityThread.-wrap12(ActivityThread.java)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:154)
            at android.app.ActivityThread.main(ActivityThread.java:6119)
            at java.lang.reflect.Method.invoke(Method.java)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
            at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:107) 
  </code></pre>
  
  <p>At the bottom this report mentions XposedBridge, which I find kind of odd. Is this caused by someone experimenting with my app using the Xposed framework? Or could this happen to a "normal user"? Crashlytics says the issue has affected 3 users so far, but I'm skeptical since they all have the exact same phone model and Android version (Motorola Nexus 6, Android 7.1.1) and happened within 10 minutes of each other.</p>
  
  <p>The NPE is caused by <code>getIntent().getStringExtra("some_string").equals("another_string")</code> in an <code>onCreate</code> method, even though I am setting the "some_string" in all places where I'm creating this activity.</p>
  
  <p>So what I'm wondering is if this sort of crash could be the result of anything other than a user who is experimenting with Xposed? I.e. should I take it seriously or not?</p>