MPAndroidChart fill color gradient

问题:

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> 

回答1:

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:

回答2:

Okay i have found a solution:

William Chart and i am using this method:

int[] colors = { getResources().getColor(R.color.menu_text),  getResources().getColor(android.R.color.white) };  float[] index = { 0, 1 }; dataset.setGradientFill(colors, index); 

文章来源: MPAndroidChart fill color gradient