Android - Resize UI widget created dynamically

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جستجوگر

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    I try to create a button dynamically with in Java and add it some constraints to position it in the center of my constrainLayout. So I write this code:

    import android.app.Activity;
    import android.os.Bundle;
    import android.support.constraint.ConstraintLayout;
    import android.support.constraint.ConstraintSet;
    import android.widget.Button;
    
    public class SelectGameActivity extends Activity {
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_select_game);
    
        ConstraintSet constraintSet = new ConstraintSet();
        ConstraintLayout constraintLayout = findViewById(R.id.constraintLayout);
        constraintSet.clone(constraintLayout);
    
        Button button = new Button(this);
        button.setText("test");
        button.setId(213);
        constraintLayout.addView(button);
    
        constraintSet.connect(button.getId(), ConstraintSet.LEFT, R.id.constraintLayout, ConstraintSet.LEFT);
        constraintSet.connect(button.getId(), ConstraintSet.RIGHT, R.id.constraintLayout, ConstraintSet.RIGHT);
        constraintSet.connect(button.getId(), ConstraintSet.TOP, R.id.constraintLayout, ConstraintSet.TOP);
        constraintSet.connect(button.getId(), ConstraintSet.BOTTOM, R.id.constraintLayout, ConstraintSet.BOTTOM);
        constraintSet.applyTo(constraintLayout);
        }
    }
    

    It works but the button fills all the screen:

    enter image description here

    I think it is because my button doesn't have any specific height and width. I tried several codes to give it a size but no effect. Could someone give me some hints to resize my button correctly ?

    Thank you very much !

    Charles

    asked 1 min ago
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    نویسنده : استخدام کار بازدید : 8 تاريخ : دوشنبه 27 شهريور 1396 ساعت: 1:53
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