Counting Chars in EditText Changed Listener

Question

In my project I have an EditText  I want to count the characters in the EditText  and show that number it in a TextView  I have written the following code and it works fine  However  my problem is when I click Backspace it counts up  but I need to decrement the number  How can I consider Backspace   tv    TextView findViewById R id charCounts   textMessage    EditText findViewById R id textMessage   textMessage addTextChangedListener new TextWatcher        public void afterTextChanged Editable s            i            tv setText String valueOf i            String valueOf charCounts              public void beforeTextChanged CharSequence s  int start  int count  int after        public void onTextChanged CharSequence s  int start  int before  int count

User · Answer

little few change in your code    TextView tv    TextView findViewById R id charCounts   textMessage    EditText findViewById R id textMessage   textMessage addTextChangedListener new TextWatcher        public void afterTextChanged Editable s            tv setText String valueOf s toString   length                public void beforeTextChanged CharSequence s  int start  int count  int after        public void onTextChanged CharSequence s  int start  int before  int count

User · Answer

Use  s length     The following was once suggested in one of the answers  but its very inefficient  textMessage getText   toString   length

User · Answer

This is a slightly more general answer with more explanation for future viewers   Add a text changed listener  If you want to find the text length or do something else after the text has been changed  you can add a text changed listener to your edit text   EditText editText    EditText  findViewById R id testEditText   editText addTextChangedListener new TextWatcher           Override     public void beforeTextChanged CharSequence charSequence  int start  int count  int after                 Override     public void onTextChanged CharSequence charSequence  int start  int before  int count                  Override     public void afterTextChanged Editable editable                 The listener needs a TextWatcher  which requires three methods to be overridden  beforeTextChanged  onTextChanged  and afterTextChanged   Counting the characters  You can get the character count in onTextChanged or beforeTextChanged with     charSequence length     or in afterTextChanged with  editable length     Meaning of the methods  The parameters are a little confusing so here is a little extra explanation   beforeTextChanged  beforeTextChanged CharSequence charSequence  int start  int count  int after    charSequence  This is the text content before the pending change is made  You should not try to change it  start  This is the index of where the new text will be inserted  If a range is selected  then it is the beginning index of the range  count  This is the length of selected text that is going to be replaced  If nothing is selected then count will be 0  after  this is the length of the text to be inserted     onTextChanged  onTextChanged CharSequence charSequence  int start  int before  int count    charSequence  This is the text content after the change was made  You should not try to modify this value here  Modify the editable in afterTextChanged if you need to  start  This is the index of the start of where the new text was inserted  before  This is the old value  It is the length of previously selected text that was replaced  This is the same value as count in beforeTextChanged  count  This is the length of text that was inserted  This is the same value as after in beforeTextChanged    afterTextChanged  afterTextChanged Editable editable   Like onTextChanged  this is called after the change has already been made  However  now the text may be modified    editable  This is the editable text of the EditText  If you change it  though  you have to be careful not to get into an infinite loop  See the documentation for more details    Supplemental image from this answer

User · Answer

TextWatcher maritalStatusTextWatcher   new TextWatcher              Override         public void beforeTextChanged CharSequence charSequence  int i  int i1  int i2                 Override     public void onTextChanged CharSequence charSequence  int i  int i1  int i2            try               if  charSequence length    0                   topMaritalStatus setVisibility View GONE                else                  topMaritalStatus setVisibility View VISIBLE                          catch  Exception e               e printStackTrace                          Override     public void afterTextChanged Editable editable

User · Answer

how about just getting the length of char in your EditText and display it   something along the line of  tv setText s length             String valueOf charCounts

[android] Counting Chars in EditText Changed Listener

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