Create a new TextView programmatically then display it below another TextView

Question

String[] textArray={"one","two","asdasasdf asdf dsdaa"};
int length=textArray.length;
RelativeLayout layout = new RelativeLayout(this);
RelativeLayout.LayoutParams relativeParams = new RelativeLayout.LayoutParams(
        LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
for(int i=0;i<length;i++){
    TextView tv=new TextView(getApplicationContext());
    tv.setText(textArray[i]);
    relativeParams.addRule(RelativeLayout.BELOW, tv.getId());
    layout.addView(tv, relativeParams);
}

I need to do something like that.. so it would display as

one
two
asdfasdfsomething

on the screen..

Briefly, what's wrong with your code? What doesn't work? Btw, if this is an Activity, just use this instead of getApplicationContext(). — EboMike
– EboMike, Commented Dec 9, 2010 at 2:33
your question title says "display it below another textview" but your question states differently, with all texts in one row - please clarify or format the question text accordingly. — Mathias Conradt
– Mathias Conradt, Commented Dec 9, 2010 at 2:34
The question wasn't formatted right - I fixed that. (It's probably not intuitive that newlines get swallowed up) — EboMike
– EboMike, Commented Dec 9, 2010 at 2:40

WeNeigh · Accepted Answer · 2015-08-10 05:17:27Z

77

If it's not important to use a RelativeLayout, you could use a LinearLayout, and do this:

LinearLayout linearLayout = new LinearLayout(this);
linearLayout.setOrientation(LinearLayout.VERTICAL);

Doing this allows you to avoid the addRule method you've tried. You can simply use addView() to add new TextViews.

Complete code:

String[] textArray = {"One", "Two", "Three", "Four"};
LinearLayout linearLayout = new LinearLayout(this);
setContentView(linearLayout);
linearLayout.setOrientation(LinearLayout.VERTICAL);        
for( int i = 0; i < textArray.length; i++ )
{
    TextView textView = new TextView(this);
    textView.setText(textArray[i]);
    linearLayout.addView(textView);
}

edited Aug 10, 2015 at 5:17

answered Jan 17, 2011 at 19:52

WeNeigh

3,5093 gold badges29 silver badges40 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

bryn Over a year ago

Don't use application context to create views. Use activity context.

Onik · Accepted Answer · 2015-11-29 00:57:20Z

23

Try this code:

final String[] str = {"one","two","three","asdfgf"};
final RelativeLayout rl = (RelativeLayout) findViewById(R.id.rl);
final TextView[] tv = new TextView[10];

for (int i=0; i<str.length; i++)
{
    tv[i] = new TextView(this); 
    RelativeLayout.LayoutParams params=new RelativeLayout.LayoutParams
         ((int)LayoutParams.WRAP_CONTENT,(int)LayoutParams.WRAP_CONTENT);
    params.leftMargin = 50;
    params.topMargin  = i*50;
    tv[i].setText(str[i]);
    tv[i].setTextSize((float) 20);
    tv[i].setPadding(20, 50, 20, 50);
    tv[i].setLayoutParams(params);
    rl.addView(tv[i]);  
}

edited Nov 29, 2015 at 0:57

Onik

20.1k14 gold badges78 silver badges100 bronze badges

answered Jul 30, 2012 at 23:33

Balaji

2,02617 silver badges13 bronze badges

Comments

WeNeigh · Accepted Answer · 2015-04-30 17:25:11Z

18

public View recentView;

public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        //Create a relative layout and add a button
        relativeLayout = new RelativeLayout(this);
        btn = new Button(this);
        btn.setId((int)System.currentTimeMillis());
        recentView = btn;
        btn.setText("Click me");
        relativeLayout.addView(btn);


        setContentView(relativeLayout);

        btn.setOnClickListener(new View.OnClickListener() {

            @Overr ide
            public void onClick(View view) {

                //Create a textView, set a random ID and position it below the most recently added view
                textView = new TextView(ActivityName.this);
                textView.setId((int)System.currentTimeMillis());
                layoutParams = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
                layoutParams.addRule(RelativeLayout.BELOW, recentView.getId());
                textView.setText("Time: "+System.currentTimeMillis());
                relativeLayout.addView(textView, layoutParams);
                recentView = textView;
            }
        });
    }

This can be modified to display each element of a String array in different TextViews.

edited Apr 30, 2015 at 17:25

answered Jan 8, 2011 at 21:37

WeNeigh

3,5093 gold badges29 silver badges40 bronze badges

1 Comment

Roberto Over a year ago

I had issues when using this logic with multiple views, as multiple items were assigned the same id, I changed the current time with a counter to solve the issue

Mathias Conradt · Accepted Answer · 2010-12-09 02:33:46Z

4

You're not assigning any id to the text view, but you're using tv.getId() to pass it to the addRule method as a parameter. Try to set a unique id via tv.setId(int).

You could also use the LinearLayout with vertical orientation, that might be easier actually. I prefer LinearLayout over RelativeLayouts if not necessary otherwise.

answered Dec 9, 2010 at 2:33

Mathias Conradt

28.8k21 gold badges144 silver badges194 bronze badges

2 Comments

Dany Y Over a year ago

How can you assign a unique id programmatically ? I mean how to be sure it will be unique, when you'll never know the values of the ids in xml, and the ids to come

fiatjaf Over a year ago

You will know the values of the ids in xml, why wouldn't you? Make ids like thisKindofElem001, thisKindofElem002 etc.

Collectives™ on Stack Overflow

Create a new TextView programmatically then display it below another TextView

4 Answers 4

1 Comment

Comments

1 Comment

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

1 Comment

Comments

1 Comment

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related