Add TextViews programmatically to a XML Layout

Question

This is a XML LinearLayout linlayout.xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/mylinear"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
</LinearLayout>

I want to add TextViews to this layout programmatically because the number of TextViews to be added can be different sometimes.

Here is the activity code:

@Override
public void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.linlayout);

    LinearLayout linear=(LinearLayout) findViewById(R.layout.mylinear);
    TextView [] txt =new TextView[3];

    for(int i=0;i<txt.length;i++)
    {
        txt[i]=new TextView(this);
        txt[i].setText("text "+i);
        txt[i].setLayoutParams(new
         LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT));
        linear.addView(txt[i]);
    }
}

The LogCat don't display errors but the TextViews are not displayed when I run the app.

I try to put the line:

setContentView(R.layout.linlayout);

at the end, after the for, but doesn't work.

Did you check if the color of your text view's text isn't the same as the background color of your layout? — Paul
– Paul, Commented Oct 11, 2012 at 10:11
TextView txt =new TextView[3]; change this line by TextView txt =new TextView[this]; — selva_pollachi
– selva_pollachi, Commented Oct 11, 2012 at 10:15
TextView [] txt =new TextView[3]; This is an array of 3 TextViews. — vpl
– vpl, Commented Oct 11, 2012 at 10:25

sfmirtalebi · Accepted Answer · 2015-11-29 01:45:03Z

4

Use this :

TextView [] txt = new TextView[3];

for (int i=0; i<txt.length; i++) {
    txt[i] = new TextView(YourActivity.this);
    txt[i].setText("text " + i);
    txt[i].setLayoutParams(newLayoutParams
    (LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT));
    linear.addView(txt[i]);
}

edited Nov 29, 2015 at 1:45

sfmirtalebi

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answered Oct 11, 2012 at 10:23

Anil Jadhav

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5 Comments

vpl Over a year ago

In my code this is Ok, just an error when I write the post, I edited it, sorry.

Anil Jadhav Over a year ago

I copied your code and paste in my application it works fine.

vpl Over a year ago

Yes, it works, thanks, Using txt[i]=new TextView(YourActivity.this); works fine.

Anil Jadhav Over a year ago

if this works fine. Then you have to accept this as right answer.

FAISAL Over a year ago

i am trying to add TextView progmmatically, but it does not work. public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); RelativeLayout rl = (RelativeLayout) findViewById(R.layout.activity_main); final TextView tv = new TextView(MainActivity.this); tv.setText("Hello World"); tv.setTextColor(Color.BLACK); tv.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT)); rl.addView(tv); setContentView(R.layout.activity_main);}

Kowlown · Accepted Answer · 2012-10-11 10:28:01Z

1

It would be best to use a ListView. By the way did you change the orientation of your layout to a vertical orientation ? But if it necessary for you i suggesst this : i suppose you have an element with a certain size.

final int size = 3; // replace with the size of your element
LinearLayout linear = (LinearLayout) findViewById(R.layout.mylinear);

for(int i=0;i<size;i++){
    final TextView textView = new TextView(this);
    textView.setText("text "+i);
    textView.setLayoutParams(new LayoutParams(
    LayoutParams.FILL_PARENT,
    LayoutParams.WRAP_CONTENT));

    linear.addView(textView);
}

answered Oct 11, 2012 at 10:28

Kowlown

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