java.lang.NullPointerException: Attempt to invoke interface method 'void android.text.TextWatcher.beforeTextChanged(java.lang.CharSequence, int, int, int)' on a null object reference

Stack Overflow | Coelacanth | 3 months ago
  1. 0

    Change EditText according to another EditText

    Stack Overflow | 3 months ago | Coelacanth
    java.lang.NullPointerException: Attempt to invoke interface method 'void android.text.TextWatcher.beforeTextChanged(java.lang.CharSequence, int, int, int)' on a null object reference
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Root Cause Analysis

  1. java.lang.NullPointerException

    Attempt to invoke interface method 'void android.text.TextWatcher.beforeTextChanged(java.lang.CharSequence, int, int, int)' on a null object reference

    at android.widget.TextView.sendBeforeTextChanged()
  2. Android Platform
    TextView.setText
    1. android.widget.TextView.sendBeforeTextChanged(TextView.java:7941)
    2. android.widget.TextView.setText(TextView.java:4242)
    3. android.widget.TextView.setText(TextView.java:4199)
    4. android.widget.EditText.setText(EditText.java:84)
    5. android.widget.TextView.setText(TextView.java:4174)
    5 frames
  3. com.example.dvido
    InputGame$1$1.afterTextChanged
    1. com.example.dvido.bela.InputGame$1$1.afterTextChanged(InputGame.java:89)
    1 frame
  4. Android Platform
    ViewGroup.dispatchKeyEvent
    1. android.widget.TextView.sendAfterTextChanged(TextView.java:8007)
    2. android.widget.TextView$ChangeWatcher.afterTextChanged(TextView.java:10168)
    3. android.text.SpannableStringBuilder.sendAfterTextChanged(SpannableStringBuilder.java:1043)
    4. android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:560)
    5. android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:492)
    6. android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:491)
    7. android.text.method.NumberKeyListener.onKeyDown(NumberKeyListener.java:121)
    8. android.widget.TextView.doKeyDown(TextView.java:6098)
    9. android.widget.TextView.onKeyDown(TextView.java:5911)
    10. android.view.KeyEvent.dispatch(KeyEvent.java:2640)
    11. android.view.View.dispatchKeyEvent(View.java:9234)
    12. android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1640)
    13. android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1640)
    14. android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1640)
    15. android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1640)
    16. android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1640)
    17. android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1640)
    18. android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1640)
    18 frames
  5. Android
    PhoneWindow.superDispatchKeyEvent
    1. com.android.internal.policy.PhoneWindow$DecorView.superDispatchKeyEvent(PhoneWindow.java:2395)
    2. com.android.internal.policy.PhoneWindow.superDispatchKeyEvent(PhoneWindow.java:1727)
    2 frames
  6. Android Platform
    Activity.dispatchKeyEvent
    1. android.app.Activity.dispatchKeyEvent(Activity.java:2725)
    1 frame
  7. Android v7
    AppCompatDelegateImplBase$AppCompatWindowCallbackBase.dispatchKeyEvent
    1. android.support.v7.app.AppCompatActivity.dispatchKeyEvent(AppCompatActivity.java:543)
    2. android.support.v7.view.WindowCallbackWrapper.dispatchKeyEvent(WindowCallbackWrapper.java:53)
    3. android.support.v7.app.AppCompatDelegateImplBase$AppCompatWindowCallbackBase.dispatchKeyEvent(AppCompatDelegateImplBase.java:312)
    3 frames
  8. Android
    PhoneWindow$DecorView.dispatchKeyEvent
    1. com.android.internal.policy.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:2310)
    1 frame
  9. Android Platform
    InputMethodManager.invokeFinishedInputEventCallback
    1. android.view.ViewRootImpl$ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:4127)
    2. android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4089)
    3. android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3642)
    4. android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3695)
    5. android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3661)
    6. android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3787)
    7. android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3669)
    8. android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3844)
    9. android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3642)
    10. android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3695)
    11. android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3661)
    12. android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3669)
    13. android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3642)
    14. android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3695)
    15. android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3661)
    16. android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3820)
    17. android.view.ViewRootImpl$ImeInputStage.onFinishedInputEvent(ViewRootImpl.java:3981)
    18. android.view.inputmethod.InputMethodManager$PendingEvent.run(InputMethodManager.java:2253)
    19. android.view.inputmethod.InputMethodManager.invokeFinishedInputEventCallback(InputMethodManager.java:1874)
    19 frames