Android: Validate Edittext must letter

Question

I'm creating a form that the user must input name without contain number or other character.

Part of the code is:

bSubmit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                String tampSalesName = salesName.getText().toString();
                String lala = cekHuruf(tampSalesName);
                if(lala.equals("number")){
                    Toast.makeText(RegisterSales.this, "Name must letters", Toast.LENGTH_SHORT).show();
                }


    public String cekHuruf(String a){
        String zzzz="";
        String aaa="";
        int ab=0;
        for (int i = 0; i < a.length(); i++) {
            int abc = i++;
            aaa= a.substring(i, abc);
            try {
                ab = Integer.parseInt(aaa);
            } catch (NumberFormatException sdef) {
                // TODO: handle exception
                zzzz="number";
            }       
        }
        return zzzz;
    }

And it will open String.class and will show error:

private StringIndexOutOfBoundsException startEndAndLength(int start, int end) {
        throw new StringIndexOutOfBoundsException(this, start, end - start);
    }

The logic : If the first word is letter it will always tamp letter. So what your suggestion about edittext must letter. I already try several way from change the input type in xml and try to use method in android EditText alphabet-only validation but still cannot work.

@NaveenTamrakar yes, i want to use validation. so what the logic and the syntax? — novie, Sep 01 '14 at 08:22

score 2 · Accepted Answer · answered Sep 01 '14 at 08:21

Use this code

name.addTextChangedListener(new TextWatcher() {

        @Override
        public void onTextChanged(CharSequence s, int start, int before,
                int count) {
            // TODO Auto-generated method stub
        }
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count,
                int after) {
            // TODO Auto-generated method stub
        }
        @Override
        public void afterTextChanged(Editable s) {
            // TODO Auto-generated method stub
            Is_Valid_Person_Name(name); // pass your EditText Obj here.
        }
    });

public void Is_Valid_Person_Name(EditText edt) throws NumberFormatException {
    if (edt.getText().toString().length() <= 0) {
        edt.setError("Accept Alphabets Only.");
        valid_name = null;
    } else if (!edt.getText().toString().matches("[a-zA-Z ]+")) {
        edt.setError("Accept Alphabets Only.");
        valid_name = null;
    } else {
        valid_name = edt.getText().toString();
    }

}

it will help.

score 0 · Answer 2 · answered Sep 01 '14 at 08:27

0

            <EditText
                android:id="@+id/username"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:digits="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ" >

            </EditText>

answered Sep 01 '14 at 08:27

John

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i dunno why, this kind of trick didnt work for me. Anyway thankyou for your help! – novie Sep 01 '14 at 08:31

Karthikeyan · Answer 3 · 2014-09-01T11:45:51.263

Use this code

        b.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            String a=salesName.getText().toString();
            Boolean z=cekHuruf(a);
            if(!z)
            {
                Toast.makeText(MainActivity.this, "Name must letters", Toast.LENGTH_SHORT).show();
            }
        }
        public boolean cekHuruf(String b){
            char[] chars = b.toCharArray();

            for (char c : chars) {
                if(!Character.isLetter(c)) {
                    return false;
                }
            }

            return true;
        }
    });

Android: Validate Edittext must letter

3 Answers3