Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Android

Posted by Sayed Ahmad Behbehani
Sayed Ahmad Behbehani
3,360 Points

Creating TextViews Dynamically

Hello there,

I'm trying to create textViews dynamically when the user submit a number in the previous screen. I got it working except I'm not sure how to get the data from the views to make the equations. I need to get ID for each view so I can write the equation and sum them all some how. Is there any suggestion?

     Intent getIntOfMainScrn = getIntent();

    int numOfLoads = Integer.parseInt(getIntOfMainScrn.getStringExtra("NofL"));

      for(int i =numOfLoads;i>0;i--) {

          LinearLayout linearLayout = new LinearLayout(this);
          linearLayout.setOrientation(LinearLayout.HORIZONTAL);
          LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
          linearLayout.setLayoutParams(layoutParams);

        EditText a = new EditText(this);
        EditText b = new EditText(this);
        EditText  p = new EditText(this);

        a.setHint("a");  a.setTextSize(100); a.setGravity(Gravity.LEFT);
        b.setHint("b"); b.setTextSize(20);; b.setGravity(Gravity.CENTER);
        p.setHint("p"); p.setTextSize(20); p.setGravity(Gravity.RIGHT);

        linearLayout.addView(a); linearLayout.addView(b); linearLayout.addView(p);
        mainInputLL.addView(linearLayout);

}

1 Answer

Ben Deitch
STAFF
Ben Deitch
Treehouse Teacher
Ben Deitch
Ben Deitch
Treehouse Teacher

We usually need the ID of the View so we can create a variable for that View, but you've already got variables for your EditTexts.

Sayed Ahmad Behbehani
Sayed Ahmad Behbehani
3,360 Points

I need to get variable for each loop to write the equation and sum the results. How would I do it while the variables are used again for each loop.

Thanks, Sayed

Ben Deitch
Ben Deitch
Treehouse Teacher
Ben Deitch
Ben Deitch
Treehouse Teacher

Store the EditTexts in an array.

Something like:

EditText[] editTexts = new EditText[numOfLoads * 3];
int editTextIndex = 0;
for(int i =numOfLoads;i>0;i--) {
        EditText a = new EditText(this);
        EditText b = new EditText(this);
        EditText  p = new EditText(this);

        editTexts[editTextIndex++] = a;
        editTexts[editTextIndex++] = b;
        editTexts[editTextIndex++] = p;
}