[Android] MPAndroidChart 圖表製作

資料來源 https://github.com/PhilJay/MPAndroidChart

網路上其實已經有很多這類的相關資訊了，但是找了很久，要不就是很複雜，要不就是很簡陋，就好像只有點到而已，所以在這邊做一個很簡單的示範，就獻醜了!!

效果顯示

XML內容

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context="com.guider.chartmp.MainActivity" >

      <com.github.mikephil.charting.charts.LineChart

          android:id="@+id/chart"

          android:layout_width="match_parent"

          android:layout_height="match_parent" />

</RelativeLayout>

code 內容

public class MainActivity extends Activity {

LineChart chart;

ArrayList <String> xVals = new ArrayList<String>();

ArrayList <String> yVals = new ArrayList<String>();

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

chart = (LineChart) findViewById(R.id.chart);

chart.setDescription("說明文字");

chart.fitScreen();

LineData data = getData(12, 100);

chart.setData(data);

}

    protected String[] mMonths = new String[] {

            "一月", "二月", "三月", "四月", "五月", "六月", "七月", "八月", "九月", "十月", "十一月", "十二月"

    };

private LineData getData(int count, float range) {

// TODO Auto-generated method stub

      ArrayList<String> xVals = new ArrayList<String>();

       for (int i = 0; i < count; i++) {

           xVals.add(mMonths[i % 12]);

       }

       ArrayList<Entry> yVals = new ArrayList<Entry>();

       for (int i = 0; i < count; i++) {

           float val = (float) (Math.random() * range) + 3;

           yVals.add(new Entry(val, i));

       }

       // create a dataset and give it a type

       LineDataSet set1 = new LineDataSet(yVals, "DataSet 1");

       set1.setLineWidth(5);

       set1.setCircleSize(3f);

       set1.setColor(Color.BLUE);

       set1.setCircleColor(Color.BLUE);

       set1.setHighLightColor(Color.BLUE);

       ArrayList<LineDataSet> dataSets = new ArrayList<LineDataSet>();

       dataSets.add(set1); // add the datasets

       // create a data object with the datasets

       LineData data = new LineData(xVals, dataSets);

return data;

}

}

完整程式下載 : https://drive.google.com/open?id=0B2WSxYpFVHkaS3VsS2dTQTlfNEE&authuser=0