CODEWITHSUNDEEP
android
Nedal Jedidi
Nedal Jedidi

Reputation: 119

set padding with percentage android

i want to set padding of an element in android in order to have 3.2% in left , right and bottom padding, i've done some research but i didn't get anything interesting , here what i've tried.

           Display display = getWindowManager().getDefaultDisplay();
                int width = display.getWidth();
                int height = display.getHeight();

                FrameLayout rel = (FrameLayout) findViewById(R.id.tabcontent);
                double width_pas= width*3.2;
                double height_pas=height*3.2;
                rel.setPadding(width_pas,0,width_pas,height_pas);

but i get error in the setpadding , it only accepte integers , but i need to set margin at 3.2 hope you can help me.

Upvotes: 2

Views: 2323

Answers (2)

Eugene Brusov
Eugene Brusov

Reputation: 17854

You can achieve this with Guidelines

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.constraint.Guideline
        android:id="@+id/startVerticalGuideline"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.032" />

    <android.support.constraint.Guideline
        android:id="@+id/endVerticalGuideline"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.968" />

    <android.support.constraint.Guideline
        android:id="@+id/bottomGuideline"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.968" />

    <FrameLayout
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="#AAA"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toEndOf="@+id/startVerticalGuideline"
        app:layout_constraintEnd_toStartOf="@+id/endVerticalGuideline"
        app:layout_constraintBottom_toTopOf="@+id/bottomGuideline" />

</android.support.constraint.ConstraintLayout>

enter image description here

Upvotes: 1

Bartek Lipinski
Bartek Lipinski

Reputation: 31468

Three things:

  1. If you want to calculate 3.2% of width/height you should multiply a specific value by 0.032 and not by 3.2.
  2. You cannot set float padding (see Adem's comment)
  3. It's not true that if you use ints instead of floats/doubles you will end up with 3% of padding instead of 3.2%. It depends on what you're gonna round. If you calculate your paddings this way:

int width_pas = Math.round(width * 0.032f);
int height_pas = Math.round(height * 0.032f);

you will end up with as accurate 3.2% percent of height/width as you can get.

Upvotes: 1

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