Android LineChart 折线图Demo

 1 首先在 build.gradle 里导入包

implementation 'com.github.PhilJay:MPAndroidChart:v3.1.0' 

2.新建 启动Activity  

LineChartActivity 如下

 1 **
 2  * @Author: Bytezero_zhengLei
 3  * @Time: 2023/3/24 10:12
 4  * @Project_Name: LineChartActivity.java
 5  * @Email: [email protected]
 6  * @Description:
 7  * @TODO: 折线图
 8  */
 9 
10 public class LineChartActivity extends AppCompatActivity {
11 
12     private LineChart lineChart;
13     List<IncomeBean> list = new ArrayList<>();
14 
15     @Override
16     protected void onCreate(Bundle savedInstanceState) {
17         super.onCreate(savedInstanceState);
18         setContentView(R.layout.activity_line_chart);
19 
20         lineChart = (LineChart) findViewById(R.id.linechart);
21 
22         lineChart = MPAndroidUtil.initChart(this, lineChart);
23 
24 
25 
26 
27         for (int i =0; i <10; i ++){
28             IncomeBean incomeBean = new IncomeBean(36.5,"2020-01-01 00:00:00");
29             list.add(incomeBean);
30 
31         }
32 
33         // 开始画折线图
34         setLineChart(list, "BMI" + "kg/²", getResources().getColor(R.color.bule_title));
35     }
36 
37 
38     //设置折线
39 
40 
41     public void setLineChart(List<IncomeBean> mLineChart, String string, int color) {
42         lineChart = MPAndroidUtil.initChart(this, lineChart);
43         lineChart.setData(MPAndroidUtil.showLineChart(mLineChart, string, color));
44         //设置一页最大显示个数为6，超出部分就滑动
45         float ratio = (float) mLineChart.size() / (float) 6;
46         //显示的时候是按照多大的比率缩放显示,1f表示不放大缩小
47         // lineChart.zoom(ratio, 1f, 0, 0);
48         // 设置填充图
49         Drawable drawable = getResources().getDrawable(R.drawable.fade_blue);
50         MPAndroidUtil.setChartFillDrawable(drawable, lineChart);
51         // 设置点击的弹窗
52         MPAndroidUtil.setMarkerView1(lineChart);
53 
54 
55        /* lineChart.getLineData().addDataSet(MPAndroidUtil.addLine(list1, "地位条", getResources().getColor(R.color.text_orange)));
56         lineChart.invalidate();*/
57 
58     }
59 }

3.新建数据 IncomeBean

 1 /**
 2  * @Author: Bytezero_zhengLei
 3  * @Time: 2023/3/24 10:24
 4  * @Project_Name: IncomeBean.java
 5  * @Email: [email protected]
 6  * @Description:
 7  * @TODO:
 8  */
 9 
10 public class IncomeBean implements Serializable {
11     public String tradeDate;// 时间
12     public double value;// 数值
13 
14     public IncomeBean(double mValue, String mTradeDate) {
15         tradeDate = mTradeDate;
16         value = mValue;
17     }
18 
19     @Override
20     public String toString() {
21         return "IncomeBean{" +
22                 "tradeDate='" + tradeDate + '\'' +
23                 ", value=" + value +
24                 '}';
25     }
26 }

4.制定折线图的属性  MPAndroidUtil

  1 /**
  2  * @Author: Bytezero_zhengLei
  3  * @Time: 2023/3/24 10:20
  4  * @Project_Name: MPAndroidUtil.java
  5  * @Email: [email protected]
  6  * @Description:
  7  * @TODO:
  8  */
  9 
 10 public class MPAndroidUtil {
 11     private static final String TAG = "MPAndroidUtil";
 12     private static XAxis xAxis = null;                //X轴
 13     private static YAxis leftYAxis;            //左侧Y轴
 14     private static YAxis rightYaxis;           //右侧Y轴
 15     private static Legend legend;              //图例
 16 
 17 
 18     /**
 19      * 初始化图表 折线图
 20      */
 21     public static LineChart initChart(Context context, LineChart lineChart) {
 22 
 23         /***图表设置***/
 24         //是否展示网格线
 25         lineChart.setDrawGridBackground(false);
 26         //是否显示边界
 27         lineChart.setDrawBorders(false);
 28         //是否可以拖动
 29         lineChart.setDragEnabled(false);
 30         //是否有触摸事件
 31         lineChart.setTouchEnabled(true);
 32         // 关闭双击放大功能
 33         lineChart.setDoubleTapToZoomEnabled(false);
 34         //设置XY轴动画效果
 35         lineChart.animateY(2500);
 36         lineChart.animateX(1500);
 37 
 38         lineChart.setBackgroundColor(context.getResources().getColor(R.color.white));
 39 
 40 
 41         /***XY轴的设置***/
 42         xAxis = null;
 43         xAxis = lineChart.getXAxis();
 44         leftYAxis = lineChart.getAxisLeft();
 45         rightYaxis = lineChart.getAxisRight();
 46         //X轴设置显示位置在底部
 47         xAxis.setPosition(XAxis.XAxisPosition.BOTTOM);
 48         xAxis.setAxisMinimum(0f);
 49         xAxis.setGranularity(1f);
 50         //保证Y轴从0开始，不然会上移一点
 51         leftYAxis.setAxisMinimum(0f);
 52         rightYaxis.setAxisMinimum(0f);
 53 
 54         // 但还是显示了网格线，而且不是我们想要的 虚线 。其实那是 X Y轴自己的网格线，禁掉即可
 55         xAxis.setDrawGridLines(false);
 56         rightYaxis.setDrawGridLines(false);
 57         leftYAxis.setDrawGridLines(true);
 58         //设置X Y轴网格线为虚线（实体线长度、间隔距离、偏移量：通常使用 0）
 59         leftYAxis.enableGridDashedLine(10f, 10f, 0f);
 60         // 目标效果图没有右侧Y轴，所以去掉右侧Y轴
 61         rightYaxis.setEnabled(false);
 62 
 63         /***折线图例 标签 设置***/
 64         legend = lineChart.getLegend();
 65         //legend.setEnabled(false);
 66         //设置显示类型，LINE CIRCLE SQUARE EMPTY 等等 多种方式，查看LegendForm 即可
 67         legend.setForm(Legend.LegendForm.LINE);
 68         legend.setTextSize(12f);
 69         //显示位置 左下方
 70         legend.setVerticalAlignment(Legend.LegendVerticalAlignment.TOP);
 71         legend.setHorizontalAlignment(Legend.LegendHorizontalAlignment.LEFT);
 72         legend.setOrientation(Legend.LegendOrientation.HORIZONTAL);
 73         //是否绘制在图表里面
 74         legend.setDrawInside(false);
 75         // legend.setExtra(mLegendEntries);
 76 
 77 //        lineChart.setNoDataText(context.getResources().getString(R.string.No_data));
 78         lineChart.setNoDataText("  ");
 79         // 设置右下角的提示
 80         Description description = new Description();
 81 //        description.setText("需要展示的内容");
 82         description.setEnabled(false);
 83         lineChart.setDescription(description);
 84 
 85         lineChart.setExtraBottomOffset(2 * 8f);
 86 
 87         lineChart.setXAxisRenderer(new CustomXAxisRenderer(lineChart.getViewPortHandler(), lineChart.getXAxis(), lineChart.getTransformer(YAxis.AxisDependency.LEFT)));
 88         return lineChart;
 89     }
 90 
 91 
 92     /**
 93      * 曲线初始化设置 一个LineDataSet 代表一条曲线
 94      *
 95      * @param lineDataSet 线条
 96      * @param color       线条颜色
 97      * @param mode
 98      */
 99     public static LineDataSet initLineDataSet(LineDataSet lineDataSet, int color, LineDataSet.Mode mode) {
100         lineDataSet.setColor(color);
101         lineDataSet.setCircleColor(color);
102         lineDataSet.setLineWidth(1f);
103         lineDataSet.setCircleRadius(2f);
104         //设置曲线值的圆点是实心还是空心
105         lineDataSet.setDrawCircleHole(true);
106         lineDataSet.setValueTextSize(10f);
107         //设置折线图填充
108         lineDataSet.setDrawFilled(true);
109         lineDataSet.setFormLineWidth(1f);
110         lineDataSet.setFormSize(15.f);
111         if (mode == null) {
112             //设置曲线展示为圆滑曲线（如果不设置则默认折线）
113             lineDataSet.setMode(LineDataSet.Mode.CUBIC_BEZIER);
114         } else {
115             lineDataSet.setMode(mode);
116         }
117         // 不显示值
118         lineDataSet.setDrawValues(false);
119         return lineDataSet;
120 
121     }
122 
123     public static LineData showLineChart(final List<IncomeBean> dataList, String name, int color) {
124         List<Entry> entries = new ArrayList<>();
125         for (int i = 0; i < dataList.size(); i++) {
126             IncomeBean data = dataList.get(i);
127             /**
128              * 在此可查看 Entry构造方法，可发现 可传入数值 Entry(float x, float y)
129              * 也可传入Drawable， Entry(float x, float y, Drawable icon) 可在XY轴交点 设置Drawable图像展示
130              */
131             Entry entry = new Entry(i, (float) data.value);
132             entries.add(entry);
133         }
134         xAxis.setValueFormatter(new IndexAxisValueFormatter() {
135             @Override
136             public String getFormattedValue(float value) {
137                 String tradeDate;
138                 try {
139                     tradeDate = dataList.get((int) value % dataList.size()).tradeDate;
140                 } catch (Exception mE) {
141                     tradeDate = "2020-01-01 00:00:00";
142                 }
143 
144                 return StrToStr("yyyy-MM-dd HH:mm:ss", "MM-dd HH:mm", tradeDate);
145             }
146         });
147 
148 
149         xAxis.setLabelCount(6, false);
150 
151         leftYAxis.setLabelCount(8);
152         // 每一个LineDataSet代表一条线
153         LineDataSet lineDataSet = new LineDataSet(entries, name);
154         lineDataSet = initLineDataSet(lineDataSet, color, LineDataSet.Mode.CUBIC_BEZIER);
155         LineData lineData = new LineData(lineDataSet);
156         return lineData;
157 
158     }
159 
160     public static void setMarkerView1(LineChart lineChart) {
161 //        LineChartMarkView1 mv = new LineChartMarkView1(MApplication.getInstance(), xAxis.getValueFormatter());
162         LineChartMarkView1 mv = new LineChartMarkView1(lineChart.getContext(), xAxis.getValueFormatter());
163         mv.setChartView(lineChart);
164         lineChart.setMarker(mv);
165         lineChart.invalidate();
166     }
167 
168 
169     /*
170      * 设置线条填充背景颜色
171      *
172      * @param drawable
173      */
174     public static LineChart setChartFillDrawable(Drawable drawable, LineChart mLineChart) {
175         if (mLineChart.getData() != null && mLineChart.getData().getDataSetCount() > 0) {
176             LineDataSet lineDataSet = (LineDataSet) mLineChart.getData().getDataSetByIndex(0);
177             //避免在 initLineDataSet()方法中 设置了 lineDataSet.setDrawFilled(false); 而无法实现效果
178             lineDataSet.setDrawFilled(true);
179             lineDataSet.setFillDrawable(drawable);
180 
181             mLineChart.invalidate();
182 
183         }
184         return mLineChart;
185     }
186 
187 
188     // 传入某种格式的时间格式，得到特定的时间格式
189     public static String StrToStr(String SimpleDateFormat_in, String SimpleDateFormat_out, String str) {
190         SimpleDateFormat format = new SimpleDateFormat(SimpleDateFormat_in);
191         SimpleDateFormat format1 = new SimpleDateFormat(SimpleDateFormat_out);
192         Date date = null;
193         try {
194             date = format.parse(str);
195         } catch (ParseException e) {
196             e.printStackTrace();
197         }
198         return format1.format(date.getTime());
199     }
200 
201 
202 }

5.LineChartMarkView1

 1 **
 2  * @Author: Bytezero_zhengLei
 3  * @Time: 2023/3/24 10:45
 4  * @Project_Name: LineChartMarkView1.java
 5  * @Email: [email protected]
 6  * @Description:
 7  * @TODO:
 8  */
 9 
10 public class LineChartMarkView1 extends MarkerView {
11 
12     private TextView tvDate;
13     private TextView tvValue;
14     private IAxisValueFormatter xAxisValueFormatter;
15     DecimalFormat df = new DecimalFormat(".00");
16 
17     public LineChartMarkView1(Context context, IAxisValueFormatter xAxisValueFormatter) {
18         super(context, R.layout.layout_markview1);
19         this.xAxisValueFormatter = xAxisValueFormatter;
20 
21         tvDate = findViewById(R.id.tv_date);
22         tvValue = findViewById(R.id.tv_value);
23     }
24 
25     @SuppressLint("SetTextI18n")
26     @Override
27     public void refreshContent(Entry e, Highlight highlight) {
28         Chart chart = getChartView();
29         if (chart instanceof LineChart) {
30             LineData lineData = ((LineChart) chart).getLineData();
31             //获取到图表中的所有曲线
32             List<ILineDataSet> dataSetList = lineData.getDataSets();
33             for (int i = 0; i < dataSetList.size(); i++) {
34                 LineDataSet dataSet = (LineDataSet) dataSetList.get(i);
35                 //获取到曲线的所有在Y轴的数据集合，根据当前X轴的位置 来获取对应的Y轴值
36                 float y = dataSet.getValues().get((int) e.getX()).getY();
37                 if (i == 0) {
38                     tvValue.setText(dataSet.getLabel() + "：" + e.getY());
39                 }
40             }
41             tvDate.setText(xAxisValueFormatter.getFormattedValue(e.getX(), null));
42         }
43 
44         super.refreshContent(e, highlight);
45     }
46 
47     @Override
48     public MPPointF getOffset() {
49         return new MPPointF(-(getWidth() / 2), -getHeight());
50 
51     }
52 }

6.CustomXAxisRenderer

 1 /**
 2  * @Author: Bytezero_zhengLei
 3  * @Time: 2023/3/24 10:23
 4  * @Project_Name: CustomXAxisRenderer.java
 5  * @Email: [email protected]
 6  * @Description:
 7  * @TODO:
 8  */
 9 
10 public class CustomXAxisRenderer extends XAxisRenderer {
11     public CustomXAxisRenderer(ViewPortHandler viewPortHandler, XAxis xAxis, Transformer trans) {
12         super(viewPortHandler, xAxis, trans);
13     }
14 
15     @Override
16     protected void drawLabel(Canvas c, String formattedLabel, float x, float y, MPPointF anchor, float angleDegrees) {
17 //        super.drawLabel(c, formattedLabel, x, y, anchor, angleDegrees);//注释掉这个，否则坐标标签复写两次
18         String[] lines = formattedLabel.split(" ");
19         for (int i = 0; i < lines.length; i++) {
20             float vOffset = i * mAxisLabelPaint.getTextSize();
21             Utils.drawXAxisValue(c, lines[i], x, y + vOffset, mAxisLabelPaint, anchor, angleDegrees);
22         }
23     }
24 }

5.一些 小的  layout  

LineChartMarkView1的layout

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     android:layout_width="wrap_content"
 3     android:layout_height="wrap_content"
 4     android:background="@drawable/shape_square"
 5     android:orientation="vertical">
 6 
 7     <TextView
 8         android:id="@+id/tv_date"
 9         android:layout_width="wrap_content"
10         android:layout_height="wrap_content"
11         android:textColor="@android:color/white" />
12 
13     <TextView
14         android:id="@+id/tv_value"
15         android:layout_width="wrap_content"
16         android:layout_height="wrap_content"
17         android:layout_marginTop="5dp"
18         android:textColor="@android:color/white" />
19 </LinearLayout>

6.LineChartActivity中的 layout

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     xmlns:app="http://schemas.android.com/apk/res-auto"
 3     xmlns:tools="http://schemas.android.com/tools"
 4     android:layout_width="match_parent"
 5     android:layout_height="match_parent"
 6     tools:context=".LineChart.LineChartActivity">
 7 
 8     <com.github.mikephil.charting.charts.LineChart
 9         android:layout_gravity="center"
10         android:id="@+id/linechart"
11         android:layout_width="match_parent"
12         android:layout_height="300dp" />
13 
14 
15 
16 
17 
18 </LinearLayout>

这样就ok了