LineDataSet set = new LineDataSet(...);
set.setColors(ColorTemplate.VORDIPLOM_COLORS);

八、值的格式化接口ValueFormatter

從1.6.2版本可用，在2.1.4版本做出修改。
ValueFormatter接口可以用來指定繪制的格式

ublic class MyValueFormatter implements ValueFormatter {

    private DecimalFormat mFormat;

    public MyValueFormatter() {
        mFormat = new DecimalFormat("###,###,##0.0"); // use one decimal
    }

    @Override
    public String getFormattedValue(float value, Entry entry, int dataSetIndex, ViewPortHandler viewPortHandler) {
        // write your logic here
        return mFormat.format(value) + " $"; // e.g. append a dollar-sign
    }
}

// usage on whole data object
lineData.setValueFormatter(new MyValueFormatter());

// usage on individual dataset object
lineDataSet.setValueFormatter(new MyValueFormatter());

LargeValueFormatter: 用於較大值得轉換，如1000轉換成1k,不支持小數點。
PercentFormatter:使用百分號，在餅狀圖中特別有用
StackedValueFormatter: 在 BarChart中使用. 它允許指定所有的堆棧值是否應繪制，或者是最高值

九、X軸上的格式化接口XAxisValueFormatter

public class MyCustomXAxisValueFormatter implements XAxisValueFormatter {

    @Override
    public String getXValue(String original, int index, ViewPortHandler viewPortHandler) {
        // original is the original value to use, x-index is the index in your x-values array
        // implement your logic here ...
        return ...;
    }
}

// usage on XAxis, get axis instance:
XAxis xAxis = chart.getXAxis();

// set the formatter
xAxis.setValueFormatter(new MyCustomXAxisValueFormatter());

自定義格式轉換MyCustomXValueFormatter

十、Y軸上的格式化接口YAxisValueFormatter

public class MyYAxisValueFormatter implements YAxisValueFormatter {

    private DecimalFormat mFormat;

    public MyYAxisValueFormatter () {
        mFormat = new DecimalFormat("###,###,##0.0"); // use one decimal
    }

    @Override
    public String getFormattedValue(float value, YAxis yAxis) {
        // write your logic here
        // access the YAxis object to get more information
        return mFormat.format(value) + " $"; // e.g. append a dollar-sign
    }
}

// get an instance of the YAxis (e.g. left axis)
YAxis leftAxis = chart.getAxisLeft();
leftAxis.setValueFormatter(new MyYAxisValueFormatter());

十一、具體圖表的設置

Line-, Bar-, Scatter-, Candle- & BubbleChart

折線圖，條形表，散點圖，K線圖，氣泡圖

setAutoScaleMinMaxEnabled(boolean enabled): 指示是否啟用在y軸自動縮放。如果啟用，當視角變換時，Y軸自動調整到和當前的X軸范圍適應的最小值，默認值false
setKeepPositionOnRotation(boolean enabled): 伸縮之後是否能還原到原來的位置. 默認值false

BarChart條形圖

PieChart餅狀圖

RadarChart雷達圖

十二、圖例

Legend legend = chart.getLegend();

setEnabled(boolean enabled)

Legend l = chart.getLegend();
    l.setFormSize(10f); // set the size of the legend forms/shapes
    l.setForm(LegendForm.CIRCLE); // set what type of form/shape should be used
    l.setPosition(LegendPosition.BELOW_CHART_LEFT);
    l.setTypeface(...);
    l.setTextSize(12f);
    l.setTextColor(Color.BLACK);
    l.setXEntrySpace(5f); // set the space between the legend entries on the x-axis
    l.setYEntrySpace(5f); // set the space between the legend entries on the y-axis

    // set custom labels and colors
    l.setCustom(ColorTemplate.VORDIPLOM_COLORS, new String[] { "Set1", "Set2", "Set3", "Set4", "Set5" });

    // and many more...

十三、動態修改數據

 // EXAMPLE 1
 // add entries to the "data" object
 exampleData.addEntry(...);
 chart.notifyDataSetChanged(); // let the chart know it's data changed
 chart.invalidate(); // refresh

 // EXAMPLE 2
 // add entries to "dataSet" object
 dataSet.addEntry(...);
 exampleData.notifyDataChanged(); // let the data know a dataSet changed
 chart.notifyDataSetChanged(); // let the chart know it's data changed
 chart.invalidate(); // refresh

示例

DynamicalAddingActivity
RealtimeDataActivity

十四、修改視圖窗口

這個庫有多種修改視圖方法，需要注意的是，這些方法只適用於LineChart, BarChart, ScatterChart and CandleStickChart。
下面提到的方法是Chart類提供的方法，另一種方法是通過ViewPortHandler直接訪問，但是這種方法只推薦熟悉API的高級用戶使用。

限制可見性
setVisibleXRangeMaximum(float maxXRange): 設置X軸上可見區域的最大值。
setVisibleXRangeMinimum(float minXRange):設置X軸上可見的最小值，限制最小縮放。
setVisibleYRangeMaximum(float maxYRange, AxisDependency axis): 設置Y軸可見的最大值。
setViewPortOffsets(float left, float top, float right, float bottom): 設置視圖偏移量，影響自動偏移量，使用resetViewPortOffsets()方法撤銷操作
etExtraOffsets(float left, float top, float right, float bottom):設置額外的偏移量，這樣做不會改變自動偏移量

移動視圖
fitScreen(): 充滿邊界
moveViewToX(float xValue):移動到X軸固定位置
moveViewTo(float xValue, float yValue, AxisDependency axis): 移動到X,Y軸固定位置
移動動畫設置
moveViewToAnimated(float xValue, float yValue, AxisDependency axis, long duration)
centerViewToAnimated(float xValue, float yValue, AxisDependency axis, long duration)
注意：所有的moveViewTo方法都會自動刷新視圖，不需要調用invalidate()方法
縮放
zoomIn()
zoomOut():
zoom(float scaleX, float scaleY, float x, float y):
zoom(float scaleX, float scaleY, float xValue, float yValue, AxisDependency axis):
縮放動畫
zoomAndCenterAnimated(float scaleX, float scaleY, float xValue, float yValue, AxisDependency axis, long duration):

chart.setData(...); // first set data

// now modify viewport
chart.setVisibleXRangeMaximum(20); // allow 20 values to be displayed at once on the x-axis, not more
chart.moveViewToX(10); // set the left edge of the chart to x-index 10
// moveViewToX(...) also calls invalidate()

十五、動畫設置

mChart.animateX(3000); // animate horizontal 3000 milliseconds
// or:
mChart.animateY(3000); // animate vertical 3000 milliseconds
// or:
mChart.animateXY(3000, 3000); // animate horizontal and vertical 3000 milliseconds

public enum EasingOption {
      Linear,
      EaseInQuad,
      EaseOutQuad,
      EaseInOutQuad,
      EaseInCubic,
      EaseOutCubic,
      EaseInOutCubic,
      EaseInQuart,
      EaseOutQuart,
      EaseInOutQuart,
      EaseInSine,
      EaseOutSine,
      EaseInOutSine,
      EaseInExpo,
      EaseOutExpo,
      EaseInOutExpo,
      EaseInCirc,
      EaseOutCirc,
      EaseInOutCirc,
      EaseInElastic,
      EaseOutElastic,
      EaseInOutElastic,
      EaseInBack,
      EaseOutBack,
      EaseInOutBack,
      EaseInBounce,
      EaseOutBounce,
      EaseInOutBounce,
  }

 public void animateY(int durationmillis, EasingFunction function); 

 /**
  * Interface for creating custom made easing functions. 
  */
  public interface EasingFunction {
     /**
      * Called everytime the animation is updated.
      * @param input - the time passed since the animation started (value between 0 and 1)
      */
      public float getInterpolation(float input);
  }

十六、MarkerView（浮層）

public class CustomMarkerView extends MarkerView {

    private TextView tvContent;

    public CustomMarkerView (Context context, int layoutResource) {
        super(context, layoutResource);
        // this markerview only displays a textview
        tvContent = (TextView) findViewById(R.id.tvContent);
    }

    // callbacks everytime the MarkerView is redrawn, can be used to update the
    // content (user-interface)
    @Override
    public void refreshContent(Entry e, Highlight highlight) {
        tvContent.setText("" + e.getVal()); // set the entry-value as the display text
    }

    @Override
    public int getXOffset(float xpos) {
        // this will center the marker-view horizontally
        return -(getWidth() / 2);
    }

    @Override
    public int getYOffset(float ypos) {
        // this will cause the marker-view to be above the selected value
        return -getHeight();
    }
}

CustomMarkerView mv = new CustomMarkerView(Context, R.layout.custom_marker_view_layout);

// set the marker to the chart
chart.setMarkerView(mv);