Change the Right Margin of a View Programmatically

Change the Right Margin of a View Programmatically?

EDIT: A more generic way of doing this that doesn't rely on the layout type (other than that it is a layout type which supports margins):

public static void setMargins (View v, int l, int t, int r, int b) {
    if (v.getLayoutParams() instanceof ViewGroup.MarginLayoutParams) {
        ViewGroup.MarginLayoutParams p = (ViewGroup.MarginLayoutParams) v.getLayoutParams();
        p.setMargins(l, t, r, b);
        v.requestLayout();
    }
}

You should check the docs for TextView. Basically, you'll want to get the TextView's LayoutParams object, and modify the margins, then set it back to the TextView. Assuming it's in a LinearLayout, try something like this:

TextView tv = (TextView)findViewById(R.id.my_text_view);
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams)tv.getLayoutParams();
params.setMargins(0, 0, 10, 0); //substitute parameters for left, top, right, bottom
tv.setLayoutParams(params);

I can't test it right now, so my casting may be off by a bit, but the LayoutParams are what need to be modified to change the margin.

NOTE

Don't forget that if your TextView is inside, for example, a
RelativeLayout, one should use RelativeLayout.LayoutParams instead of
LinearLayout.LayoutParams

Change a view margins programmatically

When you set margins programatically, you set value in pixels, not dp. Source of LayoutParams:

         /**
         * Sets the margins, in pixels. A call to {@link android.view.View#requestLayout()} needs
         * to be done so that the new margins are taken into account. Left and right margins may be
         * overridden by {@link android.view.View#requestLayout()} depending on layout direction.
         * Margin values should be positive.
         *
         * @param left the left margin size
         * @param top the top margin size
         * @param right the right margin size
         * @param bottom the bottom margin size
         *
         * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginLeft
         * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginTop
         * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginRight
         * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginBottom
         */
        public void setMargins(int left, int top, int right, int bottom) {
            leftMargin = left;
            topMargin = top;
            rightMargin = right;
            bottomMargin = bottom;
            mMarginFlags &= ~LEFT_MARGIN_UNDEFINED_MASK;
            mMarginFlags &= ~RIGHT_MARGIN_UNDEFINED_MASK;
            if (isMarginRelative()) {
                mMarginFlags |= NEED_RESOLUTION_MASK;
            } else {
                mMarginFlags &= ~NEED_RESOLUTION_MASK;
            }
        }

You need convert your dp to pixels:

Int yourDP = 250
Resources r = getResources();
float px = TypedValue.applyDimension(
    TypedValue.COMPLEX_UNIT_DIP,
    yourDP,
    r.getDisplayMetrics()
);
ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) linearLayoutRv.getLayoutParams();
            params.setMargins(0,0,0,(int) px); // params.setMargins(0,0,0,0); at first
            linearLayoutRv.setLayoutParams(params);

In Android, how do I set margins in dp programmatically?

You should use LayoutParams to set your button margins:

LayoutParams params = new LayoutParams(
        LayoutParams.WRAP_CONTENT,      
        LayoutParams.WRAP_CONTENT
);
params.setMargins(left, top, right, bottom);
yourbutton.setLayoutParams(params);

Depending on what layout you're using you should use RelativeLayout.LayoutParams or LinearLayout.LayoutParams.

And to convert your dp measure to pixel, try this:

Resources r = mContext.getResources();
int px = (int) TypedValue.applyDimension(
        TypedValue.COMPLEX_UNIT_DIP,
        yourdpmeasure, 
        r.getDisplayMetrics()
);

How to set margin on view programmatically?

After you have created the icon, you should first generate an id for it:

icon.setId(View.generateViewId());

Then, remove the setMargins line and add these lines below layout.addView(icon):

ConstraintSet set = new ConstraintSet();
set.clone(layout);

set.constrainWidth(icon.getId(), (int)(90*scale));
set.constrainHeight(icon.getId(), (int)(90*scale));

set.connect(icon.getId(), ConstraintSet.TOP, ConstraintSet.PARENT_ID, ConstraintSet.TOP, 0);
set.connect(icon.getId(), ConstraintSet.START, ConstraintSet.PARENT_ID, ConstraintSet.START, 100);

set.applyTo(layout);

I haven't tested it but it should be a step in the right direction.

Let me know how it goes.

android set margin programmatically

Try this code:

parameter =  (RelativeLayout.LayoutParams) txtField.getLayoutParams();
parameter.setMargins(leftMargin, parameter.topMargin, parameter.rightMargin, parameter.bottomMargin); // left, top, right, bottom
txtField.setLayoutParams(parameter);

How to change the layout margins programmatically

This seems to be fixed/changed for iOS 11. Lower versions are out of luck.

I've elaborated more in this question

How to set margins for TextView programmatically?

set to LayoutParams.

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
params.setMargins(10,10,10,10);
tv1.setLayoutParams(params);

Set runtime margin to any view using Kotlin

You need to get the layoutParams object from button and cast it to ViewGroup.MarginLayoutParams (which is a parent class of LinearLayout.LayoutParams, RelativeLayout.LayoutParams and others and you don't have to check which is btnClickMe's actual parent) and set margins to whatever you want.

Check following code:

val param = btnClickMe.layoutParams as ViewGroup.MarginLayoutParams
param.setMargins(10,10,10,10)
btnClickMe.layoutParams = param // Tested!! - You need this line for the params to be applied.

Hope it helps.

Setting margin programmatically to CardView

In your case you are not specifically interested who is the parent of your CardView, because the only thing you want to change is the margin. All of the *LayoutParams classes are direct/indirect children of MarginLayoutParams, which means you can easily cast to MarginLayoutParams and perform change on that object:

ViewGroup.MarginLayoutParams layoutParams =
        (ViewGroup.MarginLayoutParams) myCardView.getLayoutParams();
layoutParams.setMargins(0, 0, SystemHelper.dpToPx(2), 0);
myCardView.requestLayout();

Set margins in a LinearLayout programmatically

Here is a little code to accomplish it:

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

LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
     LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);

layoutParams.setMargins(30, 20, 30, 0);

Button okButton=new Button(this);
okButton.setText("some text");
ll.addView(okButton, layoutParams);

---

Related Topics