Depricated

With introduction of ConstraintLayout you don't have to write either a single line of code or use third-parties.

Here's the example of how to keep 1:1 aspect ratio for your layout using ConstraintLayout:

<android.support.constraint.ConstraintLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <View
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginEnd="0dp"
        android:layout_marginStart="0dp"
        android:layout_marginTop="0dp"
        android:background="@android:color/black"
        app:layout_constraintDimensionRatio="H,1:1"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

   </View>

</android.support.constraint.ConstraintLayout>

Ratio Layouts

A collection of ViewGroups which can have a constant width to height ratio.

Demo

Ratio Layouts (APK)

Assign a ratio and never worry about your views looking out of propotions.

Installation

Gradle

dependencies {
    compile "com.ritesh:ratiolayout:${latestVersion}"
}

Usage

Define 'app' namespace on root view in your layout

xmlns:app="http://schemas.android.com/apk/res-auto"

Include this library in your layout

<com.ritesh.ratiolayout.RatioRelativeLayout
        android:id="@+id/activity_main_ratio_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:fixed_attribute="WIDTH"
        app:horizontal_ratio="1"
        app:vertical_ratio="1">

Supported Attributs

XML Attribut	Programmatical Getters	Description
app:fixed_attribute	getFixedAttribute()	Set one side of the layout as fixed, calculating the other based on this
app:horizontal_ratio	getHorizontalRatio()	Horizontal aspect ratio.
app:vertical_ratio	getVerticalRatio()	Vertical aspect ratio.

Supported Layouts

• RatioFrameLayout
• RatioGridLayout
• RatioLinearLayout
• RatioRelativeLayout
• RatioTableLayout

Supported Java Setters

• setRatio(float horizontalRatio, float verticalRatio) - Sets ratios
• setRatio(FixedAttribute fixedAttribute, float horizontalRatio, float verticalRatio) - Sets ratios along with Fixed Side.

Contact me

If you have a better idea or way on this project, please let me know, thanks :)

Email

License

This project is licensed under the MIT License - see the LICENSE.md file for details