CODEWITHSUNDEEP
javaandroidmarginsandroid-constraintlayoutconstraint-layout-chains
Patryk Godowski
Patryk Godowski

Reputation: 1137

Android ConstraintLayout - how to set margins of chain_packed elements programmatically

This is my code:

ConstraintLayout.LayoutParams buttonParams = new ConstraintLayout.LayoutParams(40,105);
buttonParams.setMargins(8,16,24,32);
secretCodeFields = findViewById(R.id.secretCodeFields);
for (int i = 0; i < 4; i++) {
    Button b = new Button(this);
    vID[i]=View.generateViewId();
    b.setId(vID[i]);
    b.setLayoutParams(buttonParams);

    secretCodeFields.addView(b);
}
set.clone(secretCodeFields);
set.createHorizontalChain(
    secretCodeFields.getId(),ConstraintSet.LEFT,
    secretCodeFields.getId(),ConstraintSet.RIGHT,
    vID,null,ConstraintSet.CHAIN_PACKED
    );
set.applyTo(secretCodeFields);

Buttons are added in the same place (so only last one is visible). The same resultat if I delete "b.setLayoutParams(buttonParams);" line and use

secretCodeFields.addView(b,buttonParams);

All buttons in one place

But if I add button with width and height params it works, but there are no more margins:

secretCodeFields.addView(b,90,90);

Buttons in chain but without margins

What I do wrong?

EDIT: secretCodeFields is ConstraintLayout

I found solution. I added margins AFTER set.applyTo... :

for (int i = 0; i < codeLenght; i++) {
        Button b = (Button)findViewById(vID[i]);
        ConstraintLayout.LayoutParams p = (ConstraintLayout.LayoutParams) b.getLayoutParams();
        p.setMargins(6,0,6,0);
        b.setLayoutParams(p);
    }

It works, but I don't know if it is the best solution.

Upvotes: 1

Views: 1214

Answers (1)

ErfanDP
ErfanDP

Reputation: 181

I know this is a late answer but here it is

the ConstraintSet.CHAIN_PACKED will remove all applied margins to your views you should first create the chain in Constraint Set then after that apply margins using the ConstrainSet connect(int startID, int startSide, int endID, int endSide, int margin) method to indicate margins.

Upvotes: 1

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