java.lang.IllegalStateException: Could not execute method for android:onClick
	at androidx.appcompat.app.i$a.onClick(Unknown Source:32)
	at android.view.View.performClick(View.java:7624)
	at android.view.View.performClickInternal(View.java:7601)
	at android.view.View.-$$Nest$mperformClickInternal(Unknown Source:0)
	at android.view.View$PerformClick.run(View.java:29819)
	at android.os.Handler.handleCallback(Handler.java:942)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loopOnce(Looper.java:223)
	at android.os.Looper.loop(Looper.java:324)
	at android.app.ActivityThread.main(ActivityThread.java:8547)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:582)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1061)
Caused by: java.lang.reflect.InvocationTargetException
	at java.lang.reflect.Method.invoke(Native Method)
	at androidx.appcompat.app.i$a.onClick(Unknown Source:23)
	... 12 more
Caused by: java.lang.NullPointerException: uri
	at java.util.Objects.requireNonNull(Objects.java:232)
	at android.content.ContentResolver.openInputStream(ContentResolver.java:1539)
	at com.entitcs.office_attendance.activities.register_complain_activity.M(Unknown Source:6)
	at com.entitcs.office_attendance.activities.register_complain_activity.submitComplain(Unknown Source:6)
	... 14 more