Is it possible with MPAndroidChart (or any other Android chart library) to fill the chart under the draw line with a gradient color? Something like this:
set1.setFillColor(getResources().getColor(R.drawable.chart_fill));
then in chart_fill.xml
:
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" >
<gradient
android:angle="90"
android:endColor="#FF207a54"
android:startColor="#FFffffff" />
</shape>
You can use the following two methods:
LineRadarDataSet#setDrawFilled(boolean isFilled);
LineRadarDataSet#setFillDrawable(Drawable d);
Here's a link to the javadoc for that class.
This is the example from the MPAndroidChart sample project:
set1.setDrawFilled(true);
if (Utils.getSDKInt() >= 18) {
// fill drawable only supported on api level 18 and above
Drawable drawable = ContextCompat.getDrawable(this, R.drawable.fade_red);
set1.setFillDrawable(drawable);
}
else {
set1.setFillColor(Color.BLACK);
}
In fade_red.xml
:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<gradient
android:angle="90"
android:startColor="#00ff0000"
android:endColor="#ffff0000" />
</shape>
Here's a sample of what it looks like on a LineChart
: