android-relativelayout – Page 3

How to add a view programmatically to RelativeLayout?

March 12, 2023 by Tarik

Heres an example to get you started, fill in the rest as applicable: TextView tv = new TextView(mContext); RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams( ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); params.addRule(RelativeLayout.ALIGN_PARENT_LEFT, RelativeLayout.TRUE); params.leftMargin = 107 … mRelativeLayout.addView(tv, params); The docs for RelativeLayout.LayoutParams and the constructors are here

How do I programmatically remove an existing rule that was defined in XML?

February 25, 2023 by Tarik

You can’t remove a rule because all rules are always stored in a fixed-size java array. But you can set a rule to 0. For example layoutParams.addRule(RelativeLayout.RIGHT_OF, 0); layoutParams.addRule(RelativeLayout.BELOW, R.id.new_ref_LinearLayout); EDIT (thanks to Roger Rapid): As of API level 17, the class RelativeLayout.LayoutParams has the following method: public void removeRule(int verb) So you can remove … Read more

LinearLayout vs RelativeLayout [closed]

February 24, 2023 by Tarik

Read this article: The Android UI toolkit offers several layout managers that are rather easy to use and, most of the time, you only need the basic features of these layout managers to implement a user interface. Sticking to the basic features is unfortunately not the most efficient way to create user interfaces. A common … Read more

How to create a RelativeLayout programmatically with two buttons one on top of the other?

February 23, 2023 by Tarik

I have written a quick example to demonstrate how to create a layout programmatically. public class CodeLayout extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Creating a new RelativeLayout RelativeLayout relativeLayout = new RelativeLayout(this); // Defining the RelativeLayout layout parameters. // In this case I want to fill its parent RelativeLayout.LayoutParams rlp … Read more

Android: Align Parent Bottom + Bottom margin

February 19, 2023 by Tarik

You can simply add a padding to the RelativeLayout instead of a margin to the Button, e.g. android:paddingBottom=”15dp”. In general I’m always testing my layout in the Exclipse preview using API Level 8 setting. This gives quite accurate results for most devices, including ICS and JB.

Overlapping Views in Android

February 14, 2023 by Tarik

Android handles transparency across views and drawables (including PNG images) natively, so the scenario you describe (a partially transparent ImageView in front of a Gallery) is certainly possible. If you’re having problems it may be related to either the layout or your image. I’ve replicated the layout you describe and successfully achieved the effect you’re … Read more

What is the baseline in RelativeLayout?

February 10, 2023 by Tarik

The term baseline comes from typography. It’s the invisible line letters in text sit on. For example, imagine you put two TextView elements next to each other. You give the second TextView a big padding (say 20dp). If you add layout_alignBaseline to the second element, the text will “scoot up” to align with the baseline … Read more