TextWatcher for more than one EditText

TextWatcher for more than one EditText

I want to implement the TextWatcher interface for more than one EditText fields. Currently I am using :

text1.addTextChangedListener(this);  text2.addTextChangedListener(this);  

then overriding the methods in my Activity:

public void afterTextChanged(Editable s) {}    public void beforeTextChanged(CharSequence s, int start, int count, int after) {}  public void onTextChanged(CharSequence s, int start, int before, int count)   {   // do some operation on text of text1 field   // do some operation on text of text2 field   }  

However this is working fine but I'm looking for other ways so that I can explicitly identify that in which EditText field the SoftKeyboard is currently focused.

Answer by Sebastian Roth for TextWatcher for more than one EditText

I would do it like this:

@Override  public void onCreate(Bundle savedInstanceState) {      super.onCreate(savedInstanceState);      setContentView(R.layout.main);        EditText e = new EditText(this);      e.addTextChangedListener(new CustomTextWatcher(e));  }    private class CustomTextWatcher implements TextWatcher {      private EditText mEditText;        public CustomTextWatcher(EditText e) {           mEditText = e;      }        public void beforeTextChanged(CharSequence s, int start, int count, int after) {      }        public void onTextChanged(CharSequence s, int start, int before, int count) {      }        public void afterTextChanged(Editable s) {      }  }  

Answer by breceivemail for TextWatcher for more than one EditText

Suggested solution in @Sebastian Roth's answer is not one instance of TextWatcher for some EditTexts. It is one class and n instances of that class for n EditTexts.

Each EditText has its own Spannable. TextWatcher's events has this Spannable as s parameter. I check their hashCode (unique Id of each object). myEditText1.getText() returns that Spannable. So if the myEditText1.getText().hashCode() equals with s.hashCode() it means that s belongs to myEditText1

So if you want to have one instance of TextWatcher for some EditTexts you should use this:

private TextWatcher generalTextWatcher = new TextWatcher() {            @Override      public void onTextChanged(CharSequence s, int start, int before,              int count) {            if (myEditText1.getText().hashCode() == s.hashCode())          {              myEditText1_onTextChanged(s, start, before, count);          }          else if (myEditText2.getText().hashCode() == s.hashCode())          {              myEditText2_onTextChanged(s, start, before, count);          }      }        @Override      public void beforeTextChanged(CharSequence s, int start, int count,              int after) {            if (myEditText1.getText().hashCode() == s.hashCode())          {              myEditText1_beforeTextChanged(s, start, count, after);          }          else if (myEditText2.getText().hashCode() == s.hashCode())          {              myEditText2_beforeTextChanged(s, start, count, after);          }      }        @Override      public void afterTextChanged(Editable s) {          if (myEditText1.getText().hashCode() == s.hashCode())          {              myEditText1_afterTextChanged(s);          }          else if (myEditText2.getText().hashCode() == s.hashCode())          {              myEditText2_afterTextChanged(s);          }      }    };  

and

myEditText1.addTextChangedListener(generalTextWatcher);  myEditText2.addTextChangedListener(generalTextWatcher);  

Answer by Renate for TextWatcher for more than one EditText

Yes, you could use multiple instances of a custom TextWatcher that store the TextView. (TextView is actually the class that has addTextChangedListener.)

Similar to the hashCode solution above you can just check if getText()==s. Instead of either storing all your controls or findViewById multiple times, you could simply scan the content tree yourself once for the control that has the CharSequence.

public TextView findTextView(View v, CharSequence s)  {     TextView tv;     ViewGroup vg;     int i, n;       if (v instanceof TextView)     {        tv = (TextView) v;        if (tv.getText()==s) return(tv);     }       else if (v instanceof ViewGroup)     {        vg = (ViewGroup) v;        n = vg.getChildCount();        for(i=0;i

Of course you could also use findTextView inside beforeTextChanged and onTextChanged.

Answer by Dharmik for TextWatcher for more than one EditText

Global One class for all the activities.

CustomTextWatcher.java

package org.logicbridge.freshclub.customizedItems;    import android.content.Context;  import android.text.Editable;  import android.text.TextWatcher;      public class CustomTextWatcher implements TextWatcher {          private EditText mEditText;          Context context;            public CustomTextWatcher(EditText e, Context context) {              mEditText = e;              this.context = context;          }            public void beforeTextChanged(CharSequence s, int start, int count,                  int after) {          }            public void onTextChanged(CharSequence s, int start, int before, int count) {          }            public void afterTextChanged(Editable s) {            }      }  

Answer by user3132789 for TextWatcher for more than one EditText

using "CustomTextWatcher" idea, I done that

1) Crated a new TextWatcherListener interface:

public interface TextWatcherExtendedListener extends NoCopySpan  {      public void afterTextChanged(View v, Editable s);        public void onTextChanged(View v, CharSequence s, int start, int before, int count);        public void beforeTextChanged(View v, CharSequence s, int start, int count, int after);  }  

2)Created and used EditTextExtended instead of EditText (in my case):

public class EditTextExtended extends EditText  {     private TextWatcherExtendedListener  mListeners = null;       public EditTextExtended(Context context)      {       super(context);     }       public EditTextExtended(Context context, AttributeSet attrs)     {        super(context, attrs);     }       public EditTextExtended(Context context, AttributeSet attrs, int defStyle)     {          super(context, attrs, defStyle);     }       public void addTextChangedListener(TextWatcherExtendedListener watcher)      {             if (mListeners == null)          {             mListeners = watcher;         }     }       public void removeTextChangedListener(TextWatcherExtendedListener watcher)      {         if (mListeners != null)          {             mListeners = null;                 }     }       void  sendBeforeTextChanged(CharSequence text, int start, int before, int after)     {         if (mListeners != null)          {             mListeners.beforeTextChanged(this, text, start, before, after);         }     }       void  sendOnTextChanged(CharSequence text, int start, int before,int after)      {         if (mListeners != null)          {             mListeners.onTextChanged(this, text, start, before, after);         }     }       void  sendAfterTextChanged(Editable text)      {         if (mListeners != null)         {             mListeners.afterTextChanged(this, text);         }     }  }  

3) So, where you need write this code:

myEditTextExtended.addTextChangedListener(this) //Let implement TextWatcherExtendedListener methods  

4)use them:

@Override  public void onTextChanged(View v, CharSequence s, int start, int before, int count)   {     //Tested and works     //do your stuff    }      @Override  public void beforeTextChanged(View v, CharSequence s, int start, int count, int after)  {          //not yet tested but it should work      }    @Override  public void afterTextChanged(View v, Editable s)   {      //not yet tested but it should work   }  

Well, let me know what do you think.

Answer by Deepak Samuel Rajan for TextWatcher for more than one EditText

One more way around is to add OnClickListener to EditText and set a global variable as given below

EditText etCurrentEditor;//Global variable    @Override      public void onClick(View v) {          // TODO Auto-generated method stub          if(v instanceof EditText){              etCurrentEditor=(EditText)v;          }      }  

Use this etCurrentEditor as a reference to currently edited EditText

@Override      public void afterTextChanged(Editable editable) {          // TODO Auto-generated method stub          switch (etCurrentEditor.getId()) {          case R.id.EDITTEXTID:              break;          default:              break;          }      }  

Answer by www for TextWatcher for more than one EditText

You can always define TextWatcher as a parameter to addTextChangedListener method.This way you can have multiple definitions for each edit text.

Answer by Tomasz for TextWatcher for more than one EditText

--EDIT--

If you want to use only afterTextChanged compare editables:

@Override  public void afterTextChanged(Editable editable) {      if (editable == mEditText1.getEditableText()) {          // DO STH      } else if (editable == mEditText2.getEditableText()) {          // DO STH      }  }  

Answer by Lakhan Sharma for TextWatcher for more than one EditText

I implemented it as:

edittext1.addTextChangedListener(this);  edittext2.addTextChangedListener(this);  edittext3.addTextChangedListener(this);  

and:

@Override  public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {    }    @Override  public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {      if(edittext1.hasFocus()){          //text changed for edittext1      }else if(edittext2.hasFocus()){          //text changed for edittext2      }else {          //text changed for edittext3      }  }    @Override  public void afterTextChanged(Editable editable) {    }  

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