CODEWITHSUNDEEP
androidtextwatcher
user1944449
user1944449

Reputation: 33

afterTextChanged crashes

I tried to implement the Textwatcher interface, I am trying to change the text in afterTextChanged(), but it crashes. Why does this crash? :

        @Override
        public void afterTextChanged(Editable s) {
            Editable myText;

            if(s.toString().contains("hi")){
                myText = s.append(" ho");
                myEdit.setText(myText);

            }
        }

Logcat

01-27 01:23:18.213: E/AndroidRuntime(2563): FATAL EXCEPTION: main
01-27 01:23:18.213: E/AndroidRuntime(2563): java.lang.StackOverflowError
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.graphics.Paint.getTextRunAdvances(Paint.java:1720)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.MeasuredText.addStyleRun(MeasuredText.java:164)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.MeasuredText.addStyleRun(MeasuredText.java:204)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.StaticLayout.generate(StaticLayout.java:281)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.DynamicLayout.reflow(DynamicLayout.java:284)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.DynamicLayout.access$000(DynamicLayout.java:35)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.DynamicLayout$ChangeWatcher.reflow(DynamicLayout.java:621)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.DynamicLayout$ChangeWatcher.onTextChanged(DynamicLayout.java:631)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.sendTextChanged(SpannableStringBuilder.java:962)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:496)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.append(SpannableStringBuilder.java:247)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.append(SpannableStringBuilder.java:30)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at com.example.textfields.MainActivity$1.afterTextChanged(MainActivity.java:45)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.widget.TextView.sendAfterTextChanged(TextView.java:7108)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.widget.TextView$ChangeWatcher.afterTextChanged(TextView.java:8805)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.sendAfterTextChanged(SpannableStringBuilder.java:970)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:497)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.append(SpannableStringBuilder.java:247)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.append(SpannableStringBuilder.java:30)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at com.example.textfields.MainActivity$1.afterTextChanged(MainActivity.java:45)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.widget.TextView.sendAfterTextChanged(TextView.java:7108)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.widget.TextView$ChangeWatcher.afterTextChanged(TextView.java:8805)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.sendAfterTextChanged(SpannableStringBuilder.java:970)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:497)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.append(SpannableStringBuilder.java:247)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.append(SpannableStringBuilder.java:30)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at com.example.textfields.MainActivity$1.afterTextChanged(MainActivity.java:45)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.widget.TextView.sendAfterTextChanged(TextView.java:7108)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.widget.TextView$ChangeWatcher.afterTextChanged(TextView.java:8805)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.sendAfterTextChanged(SpannableStringBuilder.java:970)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:497)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.append(SpannableStringBuilder.java:247)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.append(SpannableStringBuilder.java:30)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at com.example.textfields.MainActivity$1.afterTextChanged(MainActivity.java:45)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.widget.TextView.sendAfterTextChanged(TextView.java:7108)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.widget.TextView$ChangeWatcher.afterTextChanged(TextView.java:8805)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.sendAfterTextChanged(SpannableStringBuilder.java:970)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:497)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.append(SpannableStringBuilder.java:247)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.append(SpannableStringBuilder.java:30)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at com.example.textfields.MainActivity$1.afterTextChanged(MainActivity.java:45)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.widget.TextView.sendAfterTextChanged(TextView.java:7108)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.widget.TextView$ChangeWatcher.afterTextChanged(TextView.java:8805)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.sendAfterTextChanged(SpannableStringBuilder.java:970)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:497)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.append(SpannableStringBuilder.java:247)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.append(SpannableStringBuilder.java:30)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at com.example.textfields.MainActivity$1.afterTextChanged(MainActivity.java:45)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.widget.TextView.sendAfterTextChanged(TextView.java:7108)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.widget.TextView$ChangeWatcher.afterTextChanged(TextView.java:8805)
01-27 01:23:18.213: E/AndroidRuntime(2563):     at android.text.SpannableStringBuilder.sendAfterTextChanged(SpannableStringBuilder.java:970)

Upvotes: 3

Views: 3912

Answers (2)

Nathani Software
Nathani Software

Reputation: 111

you can also try this:-

This also for changing alternate editText value after change.

public class MainActivity extends AppCompatActivity 
implements TextWatcher{

   EditText editText1, editText2;
   @Override
    protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);

       editText1 = findViewById(R.id.editText1);
       editText2 = findViewById(R.id.editText2);

       editText1.addTextChangedListener(this);
       editText2.addTextChangedListener(this);

      }

    @Override
    public void beforeTextChanged(CharSequence s, int start, 
           int 
           count, int after) {

    }

   @Override
   public void onTextChanged(CharSequence s, int start, int 
           before, int count) {

   }

  @Override
  public void afterTextChanged(Editable s) {

      if (getCurrentFocus() == editText1) {
         // is only executed if the EditText was directly 
            changed by the user.
          Log.e("check","getCurrentFocus() == editText1");

          editText2.removeTextChangedListener(this);

          editText2.setText(String.valueOf(s));

          editText2.addTextChangedListener(this);

       //            editText1.clearFocus();
      }

      if (getCurrentFocus() == editText2) {
          // is only executed if the EditText was directly 
             changed by the user
          Log.e("check","getCurrentFocus() == editText2");

          editText1.removeTextChangedListener(this);

          editText1.setText(String.valueOf(s));

          editText1.addTextChangedListener(this);

        //            editText2.clearFocus();
        }


   }

}

Upvotes: 1

wsanville
wsanville

Reputation: 37506

You should call removeTextChangedListener() on your EditText before you set its text, and add your listener back after changing the text. Otherwise afterTextChanged() will keep getting called, like you've noticed.

Upvotes: 5

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