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Background with chart and smooth bezier lines from float array. Simple use and connect

License: GNU General Public License v3.0

Kotlin 88.94% Java 11.06%
background chart charts android kotlin-android kotlin android-chart android-charts background-chart

android-backgroundchart's Introduction

Android Arsenal

Android-BackgroundChart

screenshot

It is a simple chart for background display of your activity or fragment. You can choose colors with gradient to display pn your chart the most customize or choose what kind your chart needs now, simple lines or bezier. Best it usage and good luck ;)

How use

<com.fdev.backgroundchart.GradientChart  
  android:id="@+id/gradientChart"  
  android:layout_width="0dp"  
  android:layout_height="0dp"  
  app:layout_constraintBottom_toBottomOf="parent"  
  app:layout_constraintEnd_toEndOf="parent"  
  app:layout_constraintStart_toStartOf="parent"  
  app:layout_constraintTop_toTopOf="parent"  
  app:plusColorStart="#2196F3"  
  app:plusColorEnd="#90CAF9"  
  app:minusColorStart="#90CAF9"  
  app:minusColorEnd="#90CAF9"  
  app:zoom="10"  
  app:isBezier="true"/>

And for appent your data just write for example

gradientChart.chartValues = arrayOf(  
  10f, 30f, 25f, 32f, 13f, 5f, 18f, 36f, 20f, 30f, 28f, 27f, 29f  
)

Gradle

Step 1. Add the JitPack repository to your build file

Add it in your root build.gradle at the end of repositories:

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

Step 2. Add the dependency

	dependencies {
	        implementation 'com.github.JastAir:Android-BackgroundChart:{version}'
	}

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android-backgroundchart's Issues

Arithmetic exception divide by zero

java.lang.ArithmeticException: divide by zero at com.fdev.backgroundchart.GradientChart.setupChartPath(GradientChart.kt:179) at com.fdev.backgroundchart.GradientChart.onMeasure(GradientChart.kt:158) at android.view.View.measure(View.java:21051) at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:715) at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:461) at android.view.View.measure(View.java:21051) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6459) at android.widget.FrameLayout.onMeasure(FrameLayout.java:185) at android.view.View.measure(View.java:21051) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6459) at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1464) at android.widget.LinearLayout.measureVertical(LinearLayout.java:758) at android.widget.LinearLayout.onMeasure(LinearLayout.java:640) at android.view.View.measure(View.java:21051) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6459) at android.widget.FrameLayout.onMeasure(FrameLayout.java:185) at androidx.appcompat.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:143) at android.view.View.measure(View.java:21051) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6459) at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1464) at android.widget.LinearLayout.measureVertical(LinearLayout.java:758) at android.widget.LinearLayout.onMeasure(LinearLayout.java:640) at android.view.View.measure(View.java:21051) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6459) at android.widget.FrameLayout.onMeasure(FrameLayout.java:185) at android.view.View.measure(View.java:21051) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6459) at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1464) at android.widget.LinearLayout.measureVertical(LinearLayout.java:758) at android.widget.LinearLayout.onMeasure(LinearLayout.java:640) at android.view.View.measure(View.java:21051) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6459) at android.widget.FrameLayout.onMeasure(FrameLayout.java:185) at com.android.internal.policy.DecorView.onMeasure(DecorView.java:853) at android.view.View.measure(View.java:21051) at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2583) at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1642) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1893) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1522) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7098) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:927) at android.view.Choreographer.doCallbacks(Choreographer.java:702) at android.view.Choreographer.doFrame(Choreographer.java:638) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:913) at android.os.Handler.handleCallback(Handler.java:751) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6682) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410)

I can't manage to setup the BackgroundChart. No matter what data I put into the float array for the chart values I get an arithmetic exception. It occures in the onSetupChartPath() methode where the chartPointStep is calculated. The mWidth is always 0 so the divide by zero arithmetic exception occures.

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