Android - Layout Not Centering

Question

I'm confused, this should be centering, yet it's not.

public void addTableImage(String imageName, LinearLayout L){

    ImageView newImage = new ImageView(c);
    RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(150, 150);
    newImage.setLayoutParams(layoutParams);

    int id = c.getResources().getIdentifier(imageName, "drawable", c.getPackageName());
    RelativeLayout l1 = new RelativeLayout(c);
    l1.setLayoutParams(new RelativeLayout.LayoutParams(400, 160));
    l1.setBackgroundColor(Color.WHITE);
    l1.setGravity(Gravity.CENTER);

    newImage.setImageResource(id); 
    l1.addView(newImage);
    L.addView(l1);
}

And I'm getting this as a result:

enter image description here

Image shows up fine (yes, it's just a placeholder green box), the background is set, and everything is set to be Gravity.CENTER, yet it's still left oriented.

Bonus points: Anyone know why "Ask a Question" now autocompletes your last question's info? It's a bit confusing, making me think I'm actually editing an old question.

vipul mittal · Accepted Answer · 2014-01-08T20:04:44.967

2

Change your code to:

public void addTableImage(String imageName, LinearLayout L){

    ImageView newImage = new ImageView(c);
    RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(150, 150);
    newImage.setLayoutParams(layoutParams);

    int id = c.getResources().getIdentifier(imageName, "drawable", c.getPackageName());
    RelativeLayout l1 = new RelativeLayout(c);
    LinearLayout.LayoutParams lp=new LinearLayout.LayoutParams(400, 160);
    lp.gravity=Gravity.CENTER;

    l1.setLayoutParams(lp);
    l1.setBackgroundColor(Color.WHITE);
    l1.setGravity(Gravity.CENTER);

    newImage.setImageResource(id); 
    l1.addView(newImage);
    L.addView(l1);
}

Your image is centered inside relativelayout by setting gravity of relative layout to center.

But to set relative layout itself to the center of the Linearlayout it is in you need to set layout gravity to center of relative layout to center or gravity of the LinearLayout to center. You can try above code it should work.

edited Jan 08 '14 at 20:04

answered Jan 08 '14 at 19:45

vipul mittal

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It says the method setGravity(int) is undefined for the type relative layout.layoutparams. – Marcel Marino Jan 08 '14 at 19:50
made a mistake there. change setGravity to lp.gravity=Gravity.CENTER; – vipul mittal Jan 08 '14 at 19:53
See this [related question](http://stackoverflow.com/questions/3482742/android-gravity-and-layout-gravity) for the reasoning behind this answer. – kabuko Jan 08 '14 at 19:54
Excellent. Thank you. Stack Overflow won't let me give you the check for another 4 minutes, at which point you will receive it. :-) – Marcel Marino Jan 08 '14 at 19:54
Hey, you helped me with that other thing, didn't you? – Marcel Marino Jan 08 '14 at 19:55

Android - Layout Not Centering

1 Answers1