AndroidMathView

• This Project's cloned from https://github.com/gregcockroft/AndroidMath
• [17/DEC/2020] Added custom attributes for xml
• [18/DEC/2021] Added methods
• [07/JAN/2021] Added autoSize : If you want to use this attribute then set the layout_width. ex) layout_width="300dp"
• [27/JAN/2021] Applied android jetpack
• [29/JAN/2021] Fixed ndk errors on some cpu architectures on the release apk

Installation from the command line

git clone https://github.com/javafa/AndroidMathView.git

cd AndroidMathView

./gradlew installDebug

Installation for Android Studio

Clone this project, run CDep. CDep pulls in the freetype dependency.

git clone https://github.com/javafa/AndroidMathView.git

cd AndroidMathView/mathdisplaylib

./cdep 

Open the project in Android Studio

Using library in your app

• Sample App For a complete simple project

This is using jitpack.io Add below lines to root's build.gradle

...

allprojects {
    repositories {
        ...

        maven { url 'https://jitpack.io' }
    }
}

Add below lines to apps's build.gradle

dependencies {
    ...
    
    implementation 'com.github.javafa:AndroidMathView:1.0.21'
}
	

<ConstraintLayout ...>

    <com.taeim.mathdisplay.AndroidMathView
        android:id="@+id/mathView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:fontSize="20sp"
        app:fontType="LatinModernMath"
        app:latex="\log_b(x) = \frac{\log_a(x)}{\log_a(b)}"
        app:fontColor="@color/colorAccent"
        app:textAlignment="center" />

    <com.taeim.mathdisplay.AndroidMathView
        android:id="@+id/mathView2"
        android:layout_width="100dp"
        android:layout_height="wrap_content"
        app:autoSize="true"
        app:fontSize="50sp"
        app:fontType="TeXGyreTermes"
        app:textAlignment="center" />

    <com.taeim.mathdisplay.AndroidMathView
        android:id="@+id/mathView3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:fontSize="10sp"
        app:fontType="XITSMath"
        app:textAlignment="center"
        />

...

</ConstraintLayout>

Attributes

Name	Type	Example
latex	String	\log_b(x) = \frac{\log_a(x)}{\log_a(b)}
fontColor	Color	@color/colorId
fontSize	Dimmension	11sp
fontType	Enum	LatinModernMath, TeXGyreTermes, XITSMath
textAlignment	Enum	left, center, right
autoSize	Boolean	false

class MainActivity:AppCompatActivity() {
    
    val binding by lazy { ActivityMainBinding.inflate(layoutInflater) } 

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(binding.root)

        binding.mathView2.latex = "{n \\brace k} = \\frac{1}{k!}\\sum_{j=0}^k (-1)^{k-j}\\binom{k}{j}(k-j)^n"
        binding.mathView2.setColorResource(R.color.colorPrimary)
        binding.mathView2.setFontSize(33.5f)

        binding.mathView3.latex = "\\int_{-\\infty}^\\infty \\! e^{-x^2} dx = \\sqrt{\\pi}"
        binding.mathView3.setColorString("#5312f3")
    }

    ...	
}

Api

Name	Parameter	Return	Example
setColorResource(@ColorRes colorId:Int)	Int	void	mathView2.setColorResource(R.color.colorPrimary)
setColorString(color:String)	String	void	mathView3.setColorString("#5312f3")
setFontSize(dp:Float)	Float	void	mathView2.setFontSize(33.5f)

Credits:

• iosMath This project is a Kotlin port for Android of the iosMath project
• Freetype is used for rendering glyphs and font metrics.
• Freetype jni was copied as a starting point to access the native freetype library.

Related Projects

• MathView uses MathJax in a WebView to render math on Android.

For people looking for things beyond just rendering math, there are two related projects:

• MathEditor: A WYSIWYG editor for math equations on iOS.
• MathSolver: A library for solving math equations.

License

AndroidMathView is available under the MIT license. See the LICENSE file for more info.

Fonts

This distribution contains the following fonts. These fonts are licensed as follows:

• Latin Modern Math: GUST Font License
• Tex Gyre Termes: GUST Font License
• XITS Math: Open Font License