Develop Reference

How to get text from TextViews which are created dynamically in android?

I do not know the number. of textview which should be created at runtime. List of Textviews are getting from server. I am creating textviews using below function. Since i am new to android i unable to get text from all textviews. Please suggest me the solution
private void textview(String text)
{
TextView txt_view= new TextView(this);
txt_view.setText(text);
linearLayout.addView(txt_view);
}
Please suggest me the solution i m stuck in getting the text from many textview
Above image is my form, what i want to get text from all views which are created dynamically and store to firebase

add your TextView to HashMap with a unique key
and match your key and get value from map, it will surely help you. after that at time of fetching data use for loop and get data using that unique key

Just get it from your TextView object, like this:
txt_view.getText().toString();

Use same object of TextView to gt text of it. txt_view.getText().toString();
You can get same TextView object by finding childs of LinearLayout.

How about to store them in an ArrayList and iterate over it to get all and maniupulate them afterwards.
ArrayList<TextView> alTextViews = new ArrayList<>();
private void textview(String text) {
TextView txt_view= new TextView(this);
alTextView.add(txt_view);
txt_view.setText(text);
linearLayout.addView(txt_view);
}
with
alTextView.get(0).getText().toString();
you'll get the text

RelativeLayout.BELOW fails to function

Basically, I've been trying to place a bunch of EditText and TextViews programmatically, all within a RelativeLayout (I have to do it programmatically because the amount of stuff is variable depending on how many "employees" the user has entered). Now, I only need ten pieces of data per "employee", so I decided to keep track of the data using id's in base 10 (ie Employee 1 gets id 0-9, Employee 2 gets id 10-19, etc.). However, every time I use LayoutParams.addRule(int,int) function and manually input my own id, it fails to pick it up. If I use the addRule(int,int) function using "R," it works. The only reason I can come up with that would explain addRule's failure to respond to the manually inputed id values is if my math (for the id-values) is wrong, but if you look at my code, the math is pretty self-explanatory. Please tell me what I'm doing wrong because this is maddening.
Here's what I have so far:
for(int i=0;i<u.getTemp().size();i++){
int index=10*i;
RelativeLayout.LayoutParams layoutParams=new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,RelativeLayout.LayoutParams.WRAP_CONTENT);
if(i==0)
layoutParams.addRule(RelativeLayout.BELOW,R.id.start_date);
else
layoutParams.addRule(RelativeLayout.BELOW,index-1);
layoutParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
TextView empName=new TextView(rl.getContext());
empName.setTextSize(26);
empName.setText(u.getTemp().get(i).getName());
empName.setId(index++);
empName.setLayoutParams(layoutParams);
rl.addView(empName);
TextView empNum=new TextView(rl.getContext());
empNum.setText("Employee Number: " + u.getTemp().get(i).getNum());
empNum.setId(index++);
RelativeLayout.LayoutParams empNumLayout=new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,RelativeLayout.LayoutParams.WRAP_CONTENT);
empNumLayout.addRule(RelativeLayout.BELOW,empNum.getId()-1);
empNumLayout.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
empNum.setLayoutParams(empNumLayout);
rl.addView(empNum);
EditText regHours=new EditText(rl.getContext());
regHours.setHint("Regular Hours");
regHours.setId(index++);
RelativeLayout.LayoutParams regHoursLayout=new RelativeLayout.LayoutParams(300,RelativeLayout.LayoutParams.WRAP_CONTENT);
regHoursLayout.addRule(RelativeLayout.BELOW,regHours.getId()-1);
regHoursLayout.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
regHours.setLayoutParams(regHoursLayout);
rl.addView(regHours);
}
*Notes: rl is the relativeLayout I placed in the xml file.

I recently lost the reputation to comment :) so I am posting it as an answer. You can try using Linear Layout instead of Relative Layout. If you require any further assistance let me know. I'll help you out. :)

The error was that ids have to be positive. The first TextView had an id of 0 which explains why the addRule didn't respond.

How to display database contents in a new activity at onclick of a button?

thing is, if i click a button GETDATA - then a new activity starts new.java and i want it to display the contents of my database.
in this new.java i have strings name and id. and i have lined database and this class, such that name and id have the corresponding details that i want to display.
now the ques is, how to display them ?
if i have a
EditText ta;
ta=findViewBy(R.id.edittext1);
ta.setText(name);
should this work ?
it isnt working. also, i dont want user to change the contents and want to make this filed un-editable.
should i use
TextView tf;
ta=findViewBy(R.id.textview1);
tf.setText(name);
?
even this isnt happening.
what is the procedure for this ?

it is done by using append.
TextView ta;
ta=(TextEdit)findViewById(Ri.id.textView1);
String a=getData(1); // goto database, id is 1
ta.append(a);

How to make number picker with only available numbers?

My app is using api 7. I don't know where to start with this challenge.
I have SQLite DB with some numbers stored between 1-99. Now I would like to make number picker for this range which would also remove numbers that are already in DB.

Create a list off the numbers 0-99, then do a query on your database. For every row in the results from the database, check if the list contains is (something like list.contains(number). If it is there, remove it (list.remove(item)) then proceed to the next row

You'll probably have to make your own widget. This will be somewhat involved, and since you are an Android beginner you might better spend your time coming up with a different input method.
In case you do decide to write your own widget, I would recommend extending LinearLayout, then inside of the constructor, doing something like this psuedocode:
setOrientation(VERTICAL);
addView ImageButton arrowUpButton;
addView EditText numberEditText;
addView ImageButton arrowDownButton;
arrowUpButton.setOnClickListener {
int num = myListOfInts.get(currentIndex++);
numberEditText.setText(num);
}
//vice versa for arrowDownButton
you'd also have to create a setter for the myListOfInts.
Good luck!

How can Dynamic Add and Remove View In android ? And this is also Store even if I closed the Application

In my Application I want to Add and Remove View (like Button, or Textview, Checkbox ) by Coding (Programming ).
In Details:
I have One EditText and One Add Button. User Enter Anything in EditText and Press the Add Button then this one is added in bellow LinearLayout, and whether User click on his/her added Button it will going to next LinearLayout.
I get sucess upto this.
but when user click the button in second LinearLayout then it will come back on first Linearlayout. I am getting error Here, i don't know where I made a Mistake.
And I also facing Problem about how can I Store this all. Like User Add 5 Button and closed the application and whenever he/she came back to application I need whatever he/she previously added.
Here is what i done.
http://dynamicandroidview.blogspot.com/2011/12/how-to-add-view-in-android-by-coding.html

Try to create a database table with minimum 2 columns in your case it will be id and buttonText.
Now when user clicks on the add button it will save text to the database and will create the button dynamically below any buttons which are already created before or as a new button.
Now in your onCreate method get the count of text thats stored in database.Some thing like the following code:
DB getData = DB.getInstance();
getData.open(this);
ArrayList<TextHolder> getList = new ArrayList<TextHolder>();
getList = getData.getAllTextFromGeT();
getData.close();
x = genList.size();
Here x will be the number/count of elements that are already stored in the database.Now you can another int say i and using this i and x in the for loop you can create buttons dynamically.
Inside the loop you can do something like the following to get text for all the buttons that are being created:
TextHolder firstOne = getList.get(i);
String text = firstOne.getText();
You will also need class with getters and setters method in order to convert DB elements into objects.Like in the above code getText() is our getter method which is getting elements from database and returning it here.
here text will be the text of the button.
So every-time users starts the application he will see all the buttons that he created when he ran the application before and newly added button will appear on the spot and also will be stored in the database for future retrieval.
Remember we are just storing text of the button and assigning it unique id which helps us to create the buttons.Hope this helps