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how to count filled edit text from multiple edittext

In my app have twenty edit text,but I want to count filled edit text and that data goes in anther activity through an array. Like when I filled 3 edit text from twenty, that 3 edit text data goes next page and that 3 count goes to next page as an int.
this is my 1st java class
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_select);
mspin=(Spinner) findViewById(R.id.spinner1);
submit = (Button) findViewById(R.id.btn1);
layout = (LinearLayout) findViewById(R.id.linear);
lay = (LinearLayout) findViewById(R.id.li);
edt=(EditText) findViewById(R.id.ed2);
sc = (ScrollView) findViewById(R.id.sc1);
int no = 20;
allEds = new ArrayList<EditText>();
for (int i=1;i<=no;i++){
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
edtAdd = new EditText(SelectActivity.this);
layout.setLayoutParams(params);
allEds.add(edtAdd);
edtAdd.setHint("Enter Name" + i);
edtAdd.setId(i);
layout.addView(edtAdd);
}
submit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (allEds.size()<=9) {
Intent data = new Intent(SelectActivity.this, HalfPieChartActivity.class);
String[] items = new String[allEds.size()];
String str = String.valueOf(allEds.size());
data.putExtra("size", str); //you don't need to keep this in loop as its same.
data.putExtra("edt", edt.getText().toString());
for (int j = 0; j < allEds.size(); j++) {
items[j] = allEds.get(j).getText().toString();
data.putExtra("edData" + j, items[j]);
}
startActivity(data);
}
else {
Intent data = new Intent(SelectActivity.this, FullPieChartActivity.class);
String[] items = new String[allEds.size()];
String str = String.valueOf(allEds.size());
data.putExtra("size", str);// this is the line where I sent that count
data.putExtra("edt", edt.getText().toString());
for (int j = 0; j < allEds.size(); j++) {
items[j] = allEds.get(j).getText().toString();
data.putExtra("edData" + j, items[j]);//here is filled data send line
}
startActivity(data);
}
}
});
}
}
When I click submit 20 show in next page as an int.I want to sent that 3data and 3 as an int.
Please help me

As you have asked for sample in comment, i am posting my answer with sample.
In onclicklistener of your submit button you can add following code.
myNoneEmptyEdittextCounter = 0;
for (int i=1;i<=no;i++)
{
myEt = (EditText) findViewById(i);
if(!TextUtils.isEmpty(myEt.getText().toString()))
{
myNoneEmptyEdittextCounter +=1;
}
}
//myNoneEmptyEdittextCounter is count of your filled edittexts

This method will return list of data and its size will give you the int you are looking for which is number of filled items.
In submit button click
submit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if(edittextValues().isEmpty()) {
//nothing has been filled
} else {
//items in edittextValues() are your data.
edittextValues().size();//this is your int which is number of edit text filled.
}
}
}
I have mentioned in comments what each step does. Hope this helps.
Method edittextValues()
ArrayList<String> edittextValues() {
ArrayList<String> filledData = new ArrayList<>(); //initialise empty string array.
for (int i=1; i<=20; i++){ //loop through ids from 1 to 20
for (int j = 0; j< layout.getChildCount(); j++) { //loop through all the children of root layout
if(layout.getChildAt(j) instanceof EditText) { //filter EditText
EditText editText = (EditText) layout.getChildAt(j);
if(editText.getId() == i) { // filter the one which u programmatically added
if(!editText.getText().toString().isEmpty()) { // check if its not empty, that's the one you are looking
filledData.add(editText.getText().toString()); //add it to the list
}
}
}
}
}
return filledData; //return string list
}

getting value in Interger array using for loop

I am new to programming and started android few week back.
public class MainActivity extends AppCompatActivity {
int a,i,j,k;
/*char [][] s1= new char[][]
{
{'A','B','C','D'},
{'E','F','G','H'},
{'I','J','K','L'},
{'M','N','O','P'},
{'Q','R','S','T'},
{'U','V','W','X'},
{' ','Y','Z',' '}};*/
char [][] s2=new char[8][8];
char[][] s3=new char[8][8];
int[] getlist= new int[10];;
char choice,choice1;
int x,b,c,d;
String[] messageText = new String[10];
String[] messageEdit = new String[10];
public void letterNo(View view) { // Method to show screen for getting number of letters
setContentView(R.layout.displaylettersno);
}
public void getNumber(View view) { // Method to get Numbers of Letter
EditText et = (EditText) findViewById(R.id.editText);
String s = et.getText().toString();
x = Integer.parseInt(s);
if (x > 0 && x < 9) {
et.setText("");
} else {
Toast.makeText(getApplicationContext(), "Wrong Entery... Enter again", Toast.LENGTH_LONG).show();
}
setContentView(R.layout.gettingcolumnno);
// Toast.makeText(getApplicationContext(),"Click on Column No in Which 1st Letter Appear",Toast.LENGTH_LONG).show();
TextView textView = (TextView) findViewById(R.id.textView8);
for (i = 0; i < x; i++){
textView.setText("Enter Column No. in which Your letters of name is
present:" );
}
}
public void buttondone(View view) {
EditText op = (EditText) findViewById(R.id.operator2);
String num = op.getText().toString();
for (i = 0; i < x; i++)
{
getlist[i] = Integer.parseInt(String.valueOf(op.getText()));
}
Toast.makeText(getApplicationContext(), "Inserted", Toast.LENGTH_LONG).show();
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
I want to develop a Name guess game
1- it will ask user to enter the no. of letters he thought
2- it will ask user to enter the column no in which his letter present ( i want this to run according to user enter the no of letter .
suppose user enter 4 digits and it will ask to enter the column no 4 times.
and similarly it has a edit box where user enter column no .
i am using for loop for this purpose but it only show 1 time i am stuck here for 1 week . help me if you understand what i am trying to do . following is my code

Done button has to be pressed number of letters time to get columns.
TextView textView = (TextView) findViewById(R.id.textView8);
int numberOfColumnsEntered = 0;
public void getNumber(View view) {
// get number logic then
textView.setText("Enter Column No. "+(numberOfColumnsEntered+1)+" in which your letters appear");
}
public void buttondone(View view) {
EditText op = (EditText) findViewById(R.id.operator2);
String num = op.getText().toString();
getlist[numberofColumnsEntered] = Integer.parseInt(num);
numberofColumnsEntered++;
textView.setText("Enter Column No. "+(numberOfColumnsEntered+1)+" in which your letters appear");
if(numberofColumnsEntered == x) {
Toast.makeText(getApplicationContext(), "Inserted", Toast.LENGTH_LONG).show();
}
}

Android empty editText is crashing my program [duplicate]

This question already has answers here:
How to parse a double from EditText to TextView? (Android)
(9 answers)
Closed 6 years ago.
First time into Java and I'm trying to create a simple tips calculator for my coworkers at the restaurant I work for, but when I leave one of the editText fields empty the program crashes.
MainACtivity:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
totalTipsInput = (EditText) findViewById(R.id.totalTipsInput);
waiter1Hours = (EditText) findViewById(R.id.waiter1Hours);
waiter2Hours = (EditText) findViewById(R.id.waiter2Hours);
waiter3Hours = (EditText) findViewById(R.id.waiter3Hours);
waiter4Hours = (EditText) findViewById(R.id.waiter4Hours);
tipsPerHourView = (TextView) findViewById(R.id.tipsPerHourView);
totalHoursView = (TextView) findViewById(R.id.totalHoursView);
barsCutView = (TextView) findViewById(R.id.barsCutView);
waiter1Pay = (TextView) findViewById(R.id.waiter1Pay);
waiter2Pay = (TextView) findViewById(R.id.waiter2Pay);
waiter3Pay = (TextView) findViewById(R.id.waiter3Pay);
waiter4Pay = (TextView) findViewById(R.id.waiter4Pay);
taxDepositView = (TextView) findViewById(R.id.taxDepositView);
Button calcBtn = (Button) findViewById(R.id.calcBtn);
calcBtn.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View view) {
double totalTips = Double.parseDouble(totalTipsInput.getText().toString());
double cWaiter1Hours = Double.parseDouble(waiter1Hours.getText().toString());
double cWaiter2Hours = Double.parseDouble(waiter2Hours.getText().toString());
double cWaiter3Hours = Double.parseDouble(waiter3Hours.getText().toString());
double cWaiter4Hours = Double.parseDouble(waiter4Hours.getText().toString());
double resultTotalHours = cWaiter1Hours + cWaiter2Hours + cWaiter3Hours + cWaiter4Hours;
double resultBarsCut = (totalTips * 7) / 100;
double resultTaxDeposit = resultTotalHours * 3;
double resultTipsPerHour = (totalTips - resultBarsCut - resultTaxDeposit) / resultTotalHours;
double resultWaiter1Pay = cWaiter1Hours * resultTipsPerHour;
double resultWaiter2Pay = cWaiter2Hours * resultTipsPerHour;
double resultWaiter3Pay = cWaiter3Hours * resultTipsPerHour;
double resultWaiter4Pay = cWaiter4Hours * resultTipsPerHour;
totalHoursView.setText(Double.toString(resultTotalHours));
tipsPerHourView.setText(Double.toString(resultTipsPerHour));
barsCutView.setText(Double.toString(resultBarsCut));
waiter1Pay.setText(Double.toString(resultWaiter1Pay));
waiter2Pay.setText(Double.toString(resultWaiter2Pay));
waiter3Pay.setText(Double.toString(resultWaiter3Pay));
waiter4Pay.setText(Double.toString(resultWaiter4Pay));
taxDepositView.setText(Double.toString(resultTaxDeposit));
}
});
}
Tried to do something like this but got an error with .length():
if (double totalTips = Double.parseDouble(totalTipsInput.getText().toString()).length() < 1 || totalTipsInput = null) {
totalTips = 0
} else {
double totalTips = Double.parseDouble(totalTipsInput.getText().toString());
}

Use this method in your class:
public static Double returnDouble(EditText editText)
{
try {
if(editText.getText().toString().isEmpty())
{
return 0d;
}
else
{
return Double.parseDouble(editText.getText().toString());
}
} catch (NumberFormatException e) {
return 0d;
}
}

You can do something like this to make sure that the input to the "parseDouble" is valid:
double totalTips = 0;
Editable totalString = totalTipsInput.getText();
if(totalString.length() > 0){
totalTips = Double.parseDouble(totalString.toString());
}
If the "totalTips" field can take user input you need to make sure they can only enter a valid number. The lazy way might be to put a try/catch around the parseDouble as well, and handle the case where someone may enter something that can't be parsed to a double (ie, empty string, letters, malformed numerical value)
I would recommend not trusting users to always input valid values in the rest of the waiter hours fields as well. You would want to do similar checks on those fields before attempting to parse the input.

Not able to display very large calculation value in editext

private TextView info;
private EditText input;
private Button getInfo;
long answer;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getInfo = (Button) findViewById(R.id.button1);
getInfo.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
input = (EditText) findViewById(R.id.editText1);
String s2 = input.getText().toString();
long inputNumber = Integer.parseInt(s2);
for (int i = 0; i <= inputNumber; i++) {
answer = fibonacci(i);
}
input.setText(answer + "");
}
});
}
public static long fibonacci(long n) {
if (n == 0) {
return 0;
} else if (n == 1) {
return 1;
} else {
return fibonacci(n - 1) + fibonacci(n - 2);
}
}
I made a program which generates fibonacci series for the number I give input through edit text and display the output value in edittext .Issue is when I enter 30 it generates fibonacci series but when I enter 50 or 100 app does not respond and stops .

I think it is because you have a lot of calculation on UI thread.
Try calculate it in AssyncTask, for example.

Make Button Array Invisible(Make an hint)

I want to make a Hint button, so when I click on it, I want to delete two buttons from the list (answers list). Now I don't know how to do it,ho w to make the for loop on the button array, so I can make this buttons invisible.
public class ClassicMode extends Activity {//מהמשחק עצמו
String pic;//תמונה של הדגל
Button answer1;//תשובות
Button answer2;
Button answer3;
Button answer4;
Button hint;
TextView guess;
TextView numOfGuess;
TextView score;
TextView scorenum;
DatabaseHandler db = new DatabaseHandler(this);
String fn;
Guesses G;
Bitmap bm;
Score s;
Button [] b = new Button[4];
#SuppressLint("NewApi")
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
ActionBar actionBar = getActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);
score =(TextView)findViewById(R.id.score);
scorenum =(TextView)findViewById(R.id.scorenum);
scorenum.setText(String.valueOf(s.score));
guess =(TextView)findViewById(R.id.guesses);
numOfGuess=(TextView)findViewById(R.id.numOfGuesses);
numOfGuess.setText(String.valueOf(Guesses.numOfGuesses));
hint =(Button)findViewById(R.id.hint);
Flags f = new Flags();
Random r = new Random();//הדגל שיבחר לשאלה
int num = r.nextInt(160);//Up
f = db.getFlag(num);//הצגת הדגל הרנדומלי שיצא
fn = f.getName().toString();
pic = f.getImage().toString();
pic_view(pic);//מעבר לפונקציה להשמת התמונה של הדגל במשחק
//מערך ארבע כפתורים כנגד ארבע תשובות
b[0] = (Button)findViewById(R.id.button1);
b[1] = (Button)findViewById(R.id.button2);
b[2] = (Button)findViewById(R.id.button3);
b[3] = (Button)findViewById(R.id.button4);
List<String>Answers=new ArrayList<String>();//מערך תשובות
Answers.add(f.getName().toString());//הוספת התשובה הנכונה
for(int i=1;i<4;i++)
{
num = r.nextInt(200);
String valToAdd1 = db.getFlag(num).getName().toString();
if(!Answers.contains(valToAdd1)){
Answers.add(valToAdd1);
}
}
/*num = r.nextInt(30);
Answers.add(db.getFlag(num).getName().toString());//הוספת 3 תשובות רנדומליות
num = r.nextInt(30);
Answers.add(db.getFlag(num).getName().toString());
num = r.nextInt(30);
Answers.add(db.getFlag(num).getName().toString());*/
Collections.shuffle(Answers);//ערבוב התשובות
for(int i=0;i<Answers.size();i++)
{
b[i].setText(Answers.get(i));//השמת התשובות מהמהערך למערך הכפתורים
}
}//end of OnCreat
Now what I've done (there is the function check, which check if you answered correctly and the hint which I don't know how to make):
public void check(View v)
{
Log.d("yes", fn);
Button b = (Button)v;
String text = b.getText().toString();
if(text.equals(fn))
{
s.score+=5;
resetQuiz();
}
else
{
s.score-=5;
if(Guesses.numOfGuesses==1)
{
G.setNumOfGuesses(3);
finish();//כאשר מספר הניחושים
return;
}
Guesses.numOfGuesses--;
numOfGuess.setText(String.valueOf(Guesses.numOfGuesses));
}
}
public void hint(View v)
{
G.numOfGuesses--;
for(int i=0;i<2;i++)
for(int j=0;j<4;j++)
{
if()
}
}

Note: this is {mostly} pseudocode
I suggest keeping two separate lists of your answers. Your Flag object already holds the correct answer. You need a list to keep track of the wrong answers (so we don't have to loop and check against each item every time). You also need a list of all of them together that you can shuffle and display.
I took a little bit of liberty making your variable names longer so they are more clear.
onCreate() {
...
btnHint.setOnClickListener(hintOnClickListener);
...
Flag f = db.getFlag(randomNum); // This is the real question & answer
List<String> wrongAnswers = new ArrayList<String>(3);
List<String> allAnswers = new ArrayList<String>(4);
// Loop 3 times for 3 random wrong answers
for (int i=0; i<=3; i++) {
randNum = r.nextInt(200);
String randWrongAnswer = db.getFlag(randNum).getName().toString();
if (! wrongAnswers.contains(randWrongAnswer)) {
wrongAnswers.add(randWrongAnswer);
}
}
allAnswers.add(f.getName().toString());
allAnswers.addAll(wrongAnswers);
Collection.shuffle(allAnswers);
...
}
I like to declare all my listeners separately further down in the code, to keep the OnCreate method clean and legible.
private OnClickListener hintOnClickListener = new OnClickListener() {
#Override
public void onClick(View v) {
G.numOfGuesses--;
// Since you shuffled the 'allAnswers' before displaying to the screen,
// we can just pick the first 2 answers from wrongAnswers list
// and it will appear to be random to the user.
for (int i=0; i < buttons.length; i++) {
String buttonText = buttons[i].getText().toString();
if (buttonText.equals(wrongAnswers.get(0))
|| buttonText.equals(wrongAnswers.get(1))) {
buttons[i].setVisibility(View.INVISIBLE);
}
}
}
};
Edit: to add hint logic based on OP's comment.