CODEWITHSUNDEEP
javaandroid
erdomester
erdomester

Reputation: 11829

Loop through numerous variables

I have 48 variables (TextViews), like tv1, tv2, tv3, tv4...tv48.

I want to set a value for these variables, with a for loop, since I do not want to write down the same row 48 times.

Something like this:

for (int i=1; i<49; i++)
{
        "tv"+i.setText(i);
}

How to achieve this?

Upvotes: 4

Views: 2494

Answers (3)

Shubham
Shubham

Reputation: 820

Initialize them like this:

TextView[] tv = new TextView[48];

Then you can set text in them using for loop like this:

for(int i=0; i<48; i++)
{
   tv[i].setText("your text");
}

EDIT: In your XML file, give identical IDs to all the textviews. For e.g. tv0, tv1, tv2 etc. Initialize a string array, which will have these IDs as string.

String ids[] = new String[48];
for(int i=0; i<48; i++)
{
   ids[i] = "tv" + Integer.toString(i);
}

Now, to initialize the array of TextView, do this:

for(int i=0; i<48; i++)
{
   int resID = getResources().getIdentifier(ids[i], "id", "your.package.name");
   tv[i] = (TextView) findViewById(resID);
}

Upvotes: 5

Raghav Sood
Raghav Sood

Reputation: 82553

TextView[] textViews = new TextView[48];

int[] ids = new int[48];

for(int i=0;i<48;i++) {
    textViews[i] = (TextView) findViewById(ids[i]);
}

for(int i=0;i<48;i++) {
    textViews[i].setText(String.valueOf(i));
}

Here, you will need to add all the IDs to the ids array.

Upvotes: 2

user529543
user529543

Reputation: 

"tv"+i

can be used only with Reflection.

I would put those TextViews in an array and 

for (int i=0; i<textViews.length; i++)
{
        textViews[i].setText(""+i);//be a String. not an int...
}

I would use, where textViews = new TextViews[]{tv1,tv2..tv48}

I hope it helps!

Upvotes: 1

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