Draw Graph and Chart

 
Then you can easily create it with a few lines of code (see snippet):

// graph with dynamically genereated horizontal and vertical labels
GraphView graphView = new GraphView(
  this // context
  , new GraphViewData[] {
    new GraphViewData(1, 2.0d)
    , new GraphViewData(2, 1.5d)
    , new GraphViewData(2.5, 3.0d) // another frequency
    , new GraphViewData(3, 2.5d)
    , new GraphViewData(4, 1.0d)
    , new GraphViewData(5, 3.0d)
  } // data
  , "GraphViewDemo" // heading
  , null // dynamic labels
  , null // dynamic labels
);
LinearLayout layout = (LinearLayout) findViewById(R.id.graph1);
layout.addView(graphView);

Exported .jar lib - https://github.com/downloads/jjoe64/GraphView/GraphView-2.5.jar
Source code here.....