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Attempt to invoke virtual method 'int android.text.Layout.getLineForOffset(int)' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'int android.text.Layout.getLineForOffset(int)' on a null object reference	at com.example.tabstrial2.TabFragment1.getCurrentCursorLine(TabFragment1.java:451)	at com.example.tabstrial2.TabFragment1$2.onTextChanged(TabFragment1.java:169)	at android.widget.TextView.sendOnTextChanged(TextView.java:7689)	at android.widget.TextView.setText(TextView.java:4070)	at android.widget.TextView.setText(TextView.java:3925)	at android.widget.EditText.setText(EditText.java:85)	at android.widget.TextView.setText(TextView.java:3900)	at android.widget.TextView.onRestoreInstanceState(TextView.java:3800)	at android.view.View.dispatchRestoreInstanceState(View.java:13754)	at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:2894)	at android.view.View.restoreHierarchyState(View.java:13732)	at android.support.v4.app.Fragment.restoreViewState(Fragment.java:477)	at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1135)	at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1290)	at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:801)	at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:1638)	at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:679)	at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:166)	at android.support.v4.view.ViewPager.populate(ViewPager.java:1240)	at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:670)	at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:632)	at android.support.v4.view.ViewPager.setCurrentItem(ViewPager.java:613)	at com.example.tabstrial2.MainActivity.onNavigationItemSelected(MainActivity.java:569)	at android.support.design.widget.NavigationView$1.onMenuItemSelected(NavigationView.java:153)	at android.support.v7.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:810)	at android.support.v7.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:152)	at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:957)	at android.support.design.internal.NavigationMenuPresenter$1.onClick(NavigationMenuPresenter.java:328)	at android.view.View.performClick(View.java:4783)	at android.view.View$PerformClick.run(View.java:19887)	at android.os.Handler.handleCallback(Handler.java:739)	at android.os.Handler.dispatchMessage(Handler.java:95)	at android.os.Looper.loop(Looper.java:135)	at android.app.ActivityThread.main(ActivityThread.java:5290)	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:911)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:706)