GraphActivity.java 文件源码

private void temperatureGraph() {
    LineChartView lineChartView = (LineChartView) findViewById(R.id.graph_temperature);

    // Data
    LineSet dataset = new LineSet();
    for (int i = 0; i < weatherList.size(); i++) {
        float temperature = UnitConvertor.convertTemperature(Float.parseFloat(weatherList.get(i).getTemperature()), sp);

        if (temperature < minTemp) {
            minTemp = temperature;
        }

        if (temperature > maxTemp) {
            maxTemp = temperature;
        }

        dataset.addPoint(getDateLabel(weatherList.get(i), i), (float) ((Math.ceil(temperature / 2)) * 2));
    }
    dataset.setSmooth(false);
    dataset.setColor(Color.parseColor("#FF5722"));
    dataset.setThickness(4);

    lineChartView.addData(dataset);

    // Grid
    Paint paint = new Paint();
    paint.setStyle(Paint.Style.STROKE);
    paint.setAntiAlias(true);
    paint.setColor(Color.parseColor("#333333"));
    paint.setPathEffect(new DashPathEffect(new float[]{10, 10}, 0));
    paint.setStrokeWidth(1);
    lineChartView.setGrid(ChartView.GridType.HORIZONTAL, paint);
    lineChartView.setBorderSpacing(Tools.fromDpToPx(10));
    lineChartView.setAxisBorderValues((int) minTemp - 2, (int) maxTemp + 2);
    lineChartView.setStep(2);
    lineChartView.setXAxis(false);
    lineChartView.setYAxis(false);

    lineChartView.show();
}