Reputation: 39
i get error when i want to check empty value in edittext that I create. It become error to my source code
btnSave.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String code = etCode.getText().toString();
String name = etName.getText().toString();
float price = Float.parseFloat(etPrice.getText().toString());
int qty = Integer.parseInt(etQty.getText().toString());
if(code.length() != 0 && name.length() != 0 && price.length() != 0 && qty.length() != 0){
myDB.addData(code, name, price, qty);
etCode.setText("");
etName.setText("");
etPrice.setText("");
etQty.setText("");
}else{
Toast.makeText(MainActivity.this,"You must put something in the text field!",Toast.LENGTH_LONG).show();
}
}
});
How to solve my problem ?
Upvotes: 0
Views: 147
Reputation: 2500
You can try like this:
btnSave.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String code = etCode.getText().toString();
String name = etName.getText().toString();
String priceStr = etPrice.getText().toString();
String qtyStr = etQty.getText().toString();
float price;
int qty;
if(code.length()==0) {
Toast.makeText(MainActivity.this,"Your code is empty!",Toast.LENGTH_LONG).show();
}
if(name.length()==0) {
Toast.makeText(MainActivity.this,"Your name is empty!",Toast.LENGTH_LONG).show();
}
if(priceStr.length()==0) {
Toast.makeText(MainActivity.this,"Your price is empty!",Toast.LENGTH_LONG).show();
}else {
try {
price = Float.parseFloat(priceStr);
}catch (Exception e) {
Toast.makeText(MainActivity.this,"Your price is not valid!",Toast.LENGTH_LONG).show();
}
}
if(qtyStr.length()==0) {
Toast.makeText(MainActivity.this,"Your qty is empty!",Toast.LENGTH_LONG).show();
}else {
try {
qty = Integer.parseInt(qtyStr);
}catch (Exception e) {
Toast.makeText(MainActivity.this,"Your qty is not valid!",Toast.LENGTH_LONG).show();
}
}
myDB.addData(code, name, price, qty);
etCode.setText("");
etName.setText("");
etPrice.setText("");
etQty.setText("");
}
});
Upvotes: 0
Reputation: 5534
I believe your error java.lang.NumberFormatException: Invalid float: ""
that is because you are trying to convert empty value to float
.
you can do as follow.
btnSave.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String code = etCode.getText().toString();
String name = etName.getText().toString();
String price = etPrice.getText().toString();
String qty = etQty.getText().toString();
if(code.isEmpty() && name.isEmpty() && price.isEmpty() && qty.isEmpty(){
float price1 = Float.parseFloat(etPrice.getText().toString());
int qty1 = Integer.parseInt(etQty.getText().toString());
myDB.addData(code, name, price1, qty1);
etCode.setText("");
etName.setText("");
etPrice.setText("");
etQty.setText("");
}else{
Toast.makeText(MainActivity.this,"You must put something in the text field!",Toast.LENGTH_LONG).show();
}
}
});
Upvotes: 1
Reputation: 2955
Try this:
btnSave.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String code = etCode.getText().toString();
String name = etName.getText().toString();
float price = Float.parseFloat(etPrice.getText().toString());
int qty = Integer.parseInt(etQty.getText().toString());
if(code.length() != 0 && name.length() != 0 && price != 0 && qty != 0){
myDB.addData(code, name, price, qty);
etCode.setText("");
etName.setText("");
etPrice.setText("");
etQty.setText("");
}else{
Toast.makeText(MainActivity.this,"You must put something in the text field!",Toast.LENGTH_LONG).show();
}
}
});
Upvotes: 0
Reputation: 205
Try this
/*
* for checking String valid or not
*/
public boolean validateString(String data) {
return (data != null && !data.isEmpty() && data.length() > 0 && !data.equals("null"));
}
if(validateString(edittext.getText().toString()){
//Valid String
}
Upvotes: 0
Reputation: 2117
You can check that way
if(etCode.getText().toString().trim().equalsIgnoreCase(""))
{
// etCode edittext is empty
}
Upvotes: 0
Reputation: 1208
try using
TextUtils.isEmpty(editText.getText().toString());
normally you can never have a null come out of a text field but you check if its empty with the above line. so both "" and null will give you back a true
Upvotes: 1
Reputation: 1204
Use the
if (TextUtils.isEmpty(edittext.getText().toString()) {
Log.d("ERROR","Edittext is empty");
}
Upvotes: 0