Battery graph in android using GraphView library?

Battery graph in android using GraphView library?

i found i great library to draw graphs. I want to create one that displays
in the x axis the time and in y the battery percentage. My goal is create
a graph like this:
You can see the percentage on the left and the date/time on bottom.
Starting from this example code :
https://github.com/jjoe64/GraphView-Demos/blob/master/src/com/jjoe64/graphviewdemos/AdvancedGraph.java
i want insert the correct data but i never used graphs. This is the
activity
public class AdvancedGraph extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.graphs);
// draw sin curve
int num = 150;
GraphViewData[] data = new GraphViewData[num];
double v=0;
for (int i=0; i<num; i++) {
v += 0.2;
data[i] = new GraphViewData(i, Math.sin(v));
}
// graph with dynamically genereated horizontal and vertical labels
GraphView graphView;
if (getIntent().getStringExtra("type").equals("bar")) {
graphView = new BarGraphView(
this
, "GraphViewDemo"
);
} else {
graphView = new LineGraphView(
this
, "GraphViewDemo"
);
}
// add data
graphView.addSeries(new GraphViewSeries(data));
// set view port, start=2, size=40
graphView.setViewPort(2, 40);
graphView.setScrollable(true);
LinearLayout layout = (LinearLayout) findViewById(R.id.graph1);
layout.addView(graphView);
// draw random curve
num = 1000;
data = new GraphViewData[num];
v=0;
for (int i=0; i<num; i++) {
v += 0.2;
data[i] = new GraphViewData(i, Math.sin(Math.random()*v));
}
// graph with dynamically genereated horizontal and vertical labels
if (getIntent().getStringExtra("type").equals("bar")) {
graphView = new BarGraphView(
this
, "GraphViewDemo"
);
} else {
graphView = new LineGraphView(
this
, "GraphViewDemo"
);
((LineGraphView) graphView).setDrawBackground(true);
}
// add data
graphView.addSeries(new GraphViewSeries(data));
// set view port, start=2, size=10
graphView.setViewPort(2, 10);
graphView.setScalable(true);
// set manual Y axis bounds
graphView.setManualYAxisBounds(2, -1);
layout = (LinearLayout) findViewById(R.id.graph2);
layout.addView(graphView);
}
}
What have i to change?How can i create what i want?Anyone can help me?
Thank you.