Using Android TextWatcher with multiple user input values and Update thses values -


i new android. try develop android application total amount of user input items. here sketch of application.enter image description here

user must enter first row col1 , col 2. first row col3 can enter or not. in sub 1 textview total value of first row should display. value should display in result textview. likewise if user inserts data second row, values must enter under col1 , col2. if user likes, can enter value under col 3. second row total value should display in sub 2 textview. if user enter values second row, result textview should automatically update total value of sub 1 , sub 2 textviews. try follows, cannot find correct way this. please if helps me solve this, thankful. java class 

public class addtwo extends appcompatactivity {      edittext edit1, edit2, edit3;     edittext edit4, edit5, edit6;     textview textviewsub1, textviewsub2, textviewresult;      /**      * called when activity first created.      */     @override     public void oncreate(bundle icicle) {         super.oncreate(icicle);         setcontentview(r.layout.activity_add_two);          /*first row variables*/         edit1 = (edittext) findviewbyid(r.id.edittext1);         edit2 = (edittext) findviewbyid(r.id.edittext2);         edit3 = (edittext) findviewbyid(r.id.edittext3);         textviewsub1 = (textview) findviewbyid(r.id.textviewsub1);           /*second row variables*/         edit4 = (edittext) findviewbyid(r.id.edittext5);         edit5 = (edittext) findviewbyid(r.id.edittext6);         edit6 = (edittext) findviewbyid(r.id.edittext7);         textviewsub2 = (textview) findviewbyid(r.id.textviewsub2);          /*final total textview variable*/         textviewresult = (textview) findviewbyid(r.id.textview_result);           //use textwatcher edit1 in first row col1         edit1.addtextchangedlistener(new textwatcher() {              public void beforetextchanged(charsequence s, int start, int count, int after) {                 // todo auto-generated method stub             }              public void ontextchanged(charsequence s, int start, int before, int count) {                 //textviewresult.settext(addnumbers());             }              public void aftertextchanged(editable s) {                 // todo auto-generated method stub             }         });          //use textwatcher first first row col2         edit2.addtextchangedlistener(new textwatcher() {              public void beforetextchanged(charsequence s, int start, int count, int after) {                 // todo auto-generated method stub             }              public void ontextchanged(charsequence s, int start, int before, int count) {              }              public void aftertextchanged(editable s) {                 // todo auto-generated method stub                 //textviewresult.settext(addnumbers());             }         });          //use textwatcher first first row col3         edit3.addtextchangedlistener(new textwatcher() {             @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 editable) {                 textviewresult.settext(addnumbers());             }         });      }       //define method addstring()     private string addnumbers() {          //declaring variables         int number1, number2;         double num1, num2;         double d1, d2;         double da1, da2;          double ordertotal1 = null, ordertotal2 = null;         double ordtot1 = null, ordtot2 = null;           decimalformat df = new decimalformat("0.00##");          //for first row         /*if first , second edittext fields in first row filled*/         if ((edit1.gettext().tostring() != "" && edit1.gettext().length() > 0) && (edit2.gettext().tostring() != "" && edit2.gettext().length() > 0)) {              num1 = double.parsedouble((edit1.gettext().tostring()));             number1 = integer.parseint(edit2.gettext().tostring());             ordtot1 = num1 * number1;             textviewsub1.settext(df.format(ordtot1));           /*else if first,secondn third (all) edittext fields in first row filled*/         } else if ((edit1.gettext().tostring() != "" && edit1.gettext().length() > 0) && (edit2.gettext().tostring() != "" && edit2.gettext().length() > 0) && (edit3.gettext().tostring() != "" && edit3.gettext().length() > 0)) {              num1 = double.parsedouble((edit1.gettext().tostring()));             number1 = integer.parseint(edit2.gettext().tostring());             d1 = double.parsedouble(edit3.gettext().tostring());              da1 = 100 - d1;             ordertotal1 = ((da1 * number1) * num1) / 100;             textviewsub1.settext(df.format(ordertotal1));          } else {             number1 = (int) 0.00;             num1 = 0.00;             da1 = 0.00;         }          //for second row         /*if first , second edittext fields in second row filled*/         if ((edit4.gettext().tostring() != "" && edit4.gettext().length() > 0) && (edit5.gettext().tostring() != "" && edit5.gettext().length() > 0)) {              num2 = double.parsedouble((edit4.gettext().tostring()));             number2 = integer.parseint(edit5.gettext().tostring());             ordtot2 = num2 * number2;             textviewsub2.settext(df.format(ordtot2));           /*else if first,secondn third (all) edittext fields in second row filled*/         } else if ((edit4.gettext().tostring() != "" && edit4.gettext().length() > 0) && (edit5.gettext().tostring() != "" && edit5.gettext().length() > 0) && (edit6.gettext().tostring() != "" && edit6.gettext().length() > 0)) {             num2 = double.parsedouble((edit1.gettext().tostring()));             number2 = integer.parseint(edit2.gettext().tostring());             d2 = double.parsedouble(edit3.gettext().tostring());              da2 = 100 - d2;             ordertotal2 = ((da2 * number2) * num2) / 100;             textviewsub2.settext(df.format(ordertotal2));          } else {             number2 = (int) 0.00;             num2 = 0.00;             da2 = 0.00;         }         //return statement         return df.format((ordertotal1) + (ordertotal2));      } }

hope help.

/**  * called when activity first created.  */ @override public void oncreate(bundle icicle) {     super.oncreate(icicle);     setcontentview(r.layout.activity_add_two);      /*first row variables*/     edit1 = (edittext) findviewbyid(r.id.edittext1);     edit2 = (edittext) findviewbyid(r.id.edittext2);     edit3 = (edittext) findviewbyid(r.id.edittext3);     textviewsub1 = (textview) findviewbyid(r.id.textviewsub1);       /*second row variables*/     edit4 = (edittext) findviewbyid(r.id.edittext5);     edit5 = (edittext) findviewbyid(r.id.edittext6);     edit6 = (edittext) findviewbyid(r.id.edittext7);     textviewsub2 = (textview) findviewbyid(r.id.textviewsub2);      /*final total textview variable*/     textviewresult = (textview) findviewbyid(r.id.textview_result);       edit1.addtextchangedlistener(new lashcustomtextwatcher());     edit2.addtextchangedlistener(new lashcustomtextwatcher());     edit3.addtextchangedlistener(new lashcustomtextwatcher());     edit4.addtextchangedlistener(new lashcustomtextwatcher());     edit5.addtextchangedlistener(new lashcustomtextwatcher());     edit6.addtextchangedlistener(new lashcustomtextwatcher()); }  public class lashcustomtextwatcher implements 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) {         textviewresult.settext(lashcalculate());     }      @override     public void aftertextchanged(editable editable) {      } }  public string lashcalculate(){     //declaring variables     double row1_value = 0;     double row2_value = 0;      decimalformat df = new decimalformat("0.00##");      //calculate first row     if (!edit1.gettext().tostring().equals("") && !edit2.gettext().tostring().equals("")){         double num1 = double.parsedouble((edit1.gettext().tostring()));         double num2 = double.parsedouble((edit2.gettext().tostring()));          row1_value = num1*num2;          double num3 = 0;         if (!edit3.gettext().tostring().equals("")){             num3 = double.parsedouble((edit3.gettext().tostring()));             row1_value = (((100 - num3) * num2) * num1)/100;         }          textviewsub1.settext(df.format(row1_value));     }      //calculate second row     if (!edit4.gettext().tostring().equals("") && !edit5.gettext().tostring().equals("")){         double num4 = double.parsedouble((edit4.gettext().tostring()));         double num5 = double.parsedouble((edit5.gettext().tostring()));          row2_value = num4*num5;          double num6 = 0;         if (!edit6.gettext().tostring().equals("")){             num6 = double.parsedouble((edit6.gettext().tostring()));             row2_value = (((100 - num6) * num5) * num4)/100;         }          textviewsub2.settext(df.format(row2_value));     }      return df.format(row1_value + row2_value); }

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