Android 之MPAndroidChart图表案例
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一 简介
1 图表用于直观的分析数据的分布情况，用于对比数据的大小和趋势。
2 图表的类型也非常多，常见的有折线，柱状，饼状，其它的有面积，散点，股价，雷达，仪表盘，漏斗等。
3 Android也有非常优秀的图表库，比如MPAndroidChart，hellocharts-android，AnyChart-Android等，其中MPAndroidChart目前使用量第一，优势在于自定义程度非常高，而且配置参数非常多，通过配置就能基本上实现所有的图表。
二 MPAndroidChart图表案例，柱状图
1 效果
2 添加 MPAndroidChart 依赖库
repositories { maven { url 'https://jitpack.io' }}dependencies { implementation 'com.github.PhilJay:MPAndroidChart:v3.1.0'}2.4 xml添加柱状图组件BarChart
5 设置图表配置和数据
public class BarActivity extends AppCompatActivity { private BarChart chart; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_bar_chart); //获取柱状图控件 chart = findViewById(R.id.chart1); //初始化柱状图控件 initBarChart(); } private void initBarChart(){ // 是否显示描述 chart.getDescription().setEnabled(false); // 如果图表中显示的条目超过60个，则不会显示任何值 chart.setMaxVisibleValueCount(60); // 只能分别在x轴和y轴上进行缩放 chart.setPinchZoom(false); // 阴影 chart.setDrawBarShadow(false); // 是否绘制背景线 chart.setDrawGridBackground(false); // x坐标绘制 XAxis xAxis = chart.getXAxis(); // x坐标位置 xAxis.setPosition(XAxis.XAxisPosition.BOTTOM); // x坐标线 xAxis.setDrawGridLines(false); //Y轴左边第1条线 chart.getAxisLeft().setDrawGridLines(false); // 添加一个漂亮平滑的动画 chart.animateY(1500); // 是否绘制图例 chart.getLegend().setEnabled(false); //设置数据 setData(); } private void setData(){ //柱状数量 相当于二位数组的 二级数据 ArrayList values = new ArrayList<>(); for (int i = 0; i < 10; i++) { float multi = (10 + 1); float val = (float) (Math.random() * multi) + multi / 3; values.add(new BarEntry(i, val)); } // 柱状分类，相当于二位数组的 一级数据 BarDataSet set1 = new BarDataSet(values, "Data Set"); set1.setColors(ColorTemplate.VORDIPLOM_COLORS); set1.setDrawValues(false); // 图表数据集合 ArrayList dataSets = new ArrayList<>(); dataSets.add(set1); // 填充图表数据 BarData data = new BarData(dataSets); chart.setData(data); chart.setFitBars(true); // 刷新图表UI chart.invalidate(); } 三 饼状图表
1 效果
3.2 xml里面增加饼状组件PieChart
3 Activity里面配置参数和数据
public class PieCharActivity extends Activity { private PieChart chart; @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_pie_chart); //饼状图控件 chart = findViewById(R.id.chart1); //初始化饼状组件 initChart(); } private void initChart(){ //是否用于百分比数据 chart.setUsePercentValues(true); chart.getDescription().setEnabled(false); chart.setExtraOffsets(5, 10, 5, 5); chart.setDragDecelerationFrictionCoef(0.95f); //设置中间文本的字体 //chart.setCenterTextTypeface(tfLight); //chart.setCenterText(generateCenterSpannableText()); //是否绘制中心圆形区域和颜色 chart.setDrawHoleEnabled(true); chart.setHoleColor(Color.WHITE); //是否绘制中心边透明区域 chart.setTransparentCircleColor(Color.WHITE); chart.setTransparentCircleAlpha(110); //绘制中中心圆，和圆边的边框大小 chart.setHoleRadius(58f); chart.setTransparentCircleRadius(61f); //是否绘制中心区域文字 chart.setDrawCenterText(true); //默认旋转角度 chart.setRotationAngle(0); //通过触摸启用图表的旋转 chart.setRotationEnabled(true); //触摸进行高亮的突出设置 chart.setHighlightPerTapEnabled(true); //设置单位 // chart.setUnit(" €"); // chart.setDrawUnitsInChart(true); //添加选择侦听器 chart.setOnChartValueSelectedListener(new OnChartValueSelectedListener() { @Override public void onValueSelected(Entry e, Highlight h) { //选中的扇页 } @Override public void onNothingSelected() { //未选中的扇页 } }); //动画 chart.animateY(1400, Easing.EaseInOutQuad); // chart.spin(2000, 0, 360); //图例 Legend l = chart.getLegend(); l.setVerticalAlignment(Legend.LegendVerticalAlignment.TOP); l.setHorizontalAlignment(Legend.LegendHorizontalAlignment.RIGHT); l.setOrientation(Legend.LegendOrientation.VERTICAL); l.setDrawInside(false); l.setXEntrySpace(7f); l.setYEntrySpace(0f); l.setYOffset(0f); //标签样式 chart.setEntryLabelColor(Color.WHITE); //chart.setEntryLabelTypeface(tfRegular); chart.setEntryLabelTextSize(12f); //设置数据 setData(); } //设置数据 private void setData() { //二维数据的二级数据 ArrayList entries = new ArrayList<>(); //new PieEntry(数值，描述，图标icon)第一个 entries.add(new PieEntry(40.0f, "数据1", null)); entries.add(new PieEntry(20.0f, "数据2", null)); entries.add(new PieEntry(30.0f, "数据3", null)); entries.add(new PieEntry(10.0f, "数据4", null)); //二维数据的一级数据 PieDataSet dataSet = new PieDataSet(entries, "Election Results"); //数据配置，是否绘制图标 dataSet.setDrawIcons(false); //扇页之间的空白间距 dataSet.setSliceSpace(3f); //图标偏移 dataSet.setIconsOffset(new MPPointF(0, 40)); dataSet.setSelectionShift(5f); //添加颜色集合， ArrayList colors = new ArrayList<>(); //colors.add(ColorTemplate.LIBERTY_COLORS[0]); colors.add(Color.parseColor("#3790A2")); colors.add(Color.parseColor("#37F0A2")); colors.add(Color.parseColor("#49DBEE")); colors.add(Color.parseColor("#43C088")); dataSet.setColors(colors); //dataSet.setSelectionShift(0f); //设置图表数据 PieData data = new PieData(dataSet); data.setValueFormatter(new PercentFormatter()); data.setValueTextSize(11f); data.setValueTextColor(Color.WHITE); //data.setValueTypeface(tfLight); chart.setData(data); //撤消所有高光 chart.highlightValues(null); //刷新图表UI chart.invalidate(); }} 四 折线图
1 效果
4.2 xml添加折线组件
3 Activity配置折现参数和数据
public class LineChartActivity extends Activity { private LineChart chart; @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_line_chart); //折线图表组件 chart = findViewById(R.id.chart1); //初始化图表 initChart(); } //初始化图表 private void initChart(){ //点击监听 //chart.setOnChartValueSelectedListener(this); //绘制网格线 chart.setDrawGridBackground(false); //描述文本 chart.getDescription().setEnabled(false); //是否可以触摸 chart.setTouchEnabled(true); //启用缩放和拖动 chart.setDragEnabled(true); chart.setScaleEnabled(true); // 如果禁用，可以分别在x轴和y轴上进行缩放 chart.setPinchZoom(true); //设置背景色 // chart.setBackgroundColor(Color.GRAY); //创建自定义MarkerView（扩展MarkerView）并指定布局 //MyMarkerView mv = new MyMarkerView(this, R.layout.custom_marker_view); //mv.setChartView(chart); // For bounds control //chart.setMarker(mv); // Set the marker to the chart //配置x坐标数据 XAxis xl = chart.getXAxis(); xl.setAvoidFirstLastClipping(true); xl.setAxisMinimum(0f); //配置y坐标左边数据 YAxis leftAxis = chart.getAxisLeft(); leftAxis.setInverted(true); leftAxis.setAxisMinimum(0f); // this replaces setStartAtZero(true) //关闭y坐标右边数据 YAxis rightAxis = chart.getAxisRight(); rightAxis.setEnabled(false); //抑制最大比例因子 // chart.setScaleMinima(3f, 3f); //将视图居中到图表中的特定位置 // chart.centerViewPort(10, 50); //图例 Legend l = chart.getLegend(); //修改图例 l.setForm(Legend.LegendForm.LINE); setData(); } private void setData() { //二维数组 一级数据 ArrayList entries = new ArrayList<>(); for (int i = 0; i < 10; i++) { float xVal = (i+1); float yVal = (float) (Math.random() * 100); entries.add(new Entry(xVal, yVal)); } //通过x坐标值排序 Collections.sort(entries, new EntryXComparator()); //二维数组 二级数据 LineDataSet set1 = new LineDataSet(entries, "DataSet 1"); //折现的宽度合折点的半径大小 set1.setLineWidth(1.5f); set1.setCircleRadius(4f); //使用数据集创建数据对象 LineData data = new LineData(set1); chart.setData(data); //刷新绘图 chart.invalidate(); }} 五 进阶饼状图和折线图，配置双折线和渐变区域
1 效果图
5.2 xml布局添加饼状和折线组件
4 Activity配置数据
public abstract class BaseActivity extends AppCompatActivity { private ActivityBaseBinding activityBaseBinding; public Binding mDataBinding; public Activity mContext; @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); mContext = this; activityBaseBinding=DataBindingUtil.setContentView(this, R.layout.activity_base); initLayoutView(); } private void initLayoutView() { activityBaseBinding.vBack.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { finish(); } }); StatuesBarUtils.setAppBar(this, true, R.color.white); mDataBinding = DataBindingUtil.inflate(getLayoutInflater(), getLayoutId(), activityBaseBinding.vContainer, true); initData(); } public void hideTitleLayout() { StatuesBarUtils.setNoAppBar(this, true); activityBaseBinding.vTitleLayout.setVisibility(View.GONE); } public void hideTitleLayout(View viewStatues) { StatuesBarUtils.setNoAppBar(this, true); activityBaseBinding.vTitleLayout.setVisibility(View.GONE); LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams) viewStatues.getLayoutParams(); layoutParams.height = StatuesBarUtils.getStatusHeight(mContext); viewStatues.setLayoutParams(layoutParams); } public void setTitleText(String text) { activityBaseBinding.vHeadTitle.setText(text); } protected abstract int getLayoutId(); public abstract void initData();} public class StatisticsActivity extends BaseActivity { private LineChart chart;//折线图 private PieChart pieChart;//饼状图 @Override protected int getLayoutId() { return R.layout.activity_statistics; } @Override public void initData() { hideTitleLayout(mDataBinding.viewStatues); mDataBinding.vBack.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { finish(); } }); mDataBinding.vDate.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { initDatePicker(); } }); //饼状图组件 pieChart = mDataBinding.vPieChart; initChartPie(); //折线图组件 chart = mDataBinding.vLineChart; initLineChar(); } //初始化饼状图 private void initChartPie() { //百分比数据 pieChart.setUsePercentValues(true); //关闭描述 pieChart.getDescription().setEnabled(false); //设置四周间距 pieChart.setExtraOffsets(5, 10, 5, 5); //拖动旋转摩擦系数 pieChart.setDragDecelerationFrictionCoef(0.95f); //中间文本 pieChart.setCenterText(""); //半透明区域 pieChart.setTransparentCircleColor(Color.WHITE); pieChart.setTransparentCircleAlpha(110); //中间白色圆环半径 pieChart.setHoleRadius(58f); pieChart.setDrawHoleEnabled(false); pieChart.setTransparentCircleRadius(61f); pieChart.setDrawCenterText(true); //旋转角度 pieChart.setRotationAngle(90); //是否可以触摸旋转 pieChart.setRotationEnabled(true); pieChart.setHighlightPerTapEnabled(true); //单位 //chart.setUnit(" €"); //chart.setDrawUnitsInChart(true); //选中监听 //chart.setOnChartValueSelectedListener(this); pieChart.setEntryLabelColor(Color.BLACK); //动画 pieChart.animateY(700, Easing.EaseInOutQuad); //chart.spin(2000, 0, 360); //图例 Legend l = pieChart.getLegend(); l.setVerticalAlignment(Legend.LegendVerticalAlignment.TOP); l.setHorizontalAlignment(Legend.LegendHorizontalAlignment.RIGHT); l.setOrientation(Legend.LegendOrientation.VERTICAL); l.setDrawInside(false); l.setEnabled(false); //设置饼状图数据 setPieData(); } //设置饼状图数据 private void setPieData() { //二维数组 二级数据 ArrayList entries = new ArrayList<>(); entries.add(new PieEntry(51.0f, "掃碼", null)); entries.add(new PieEntry(23.0f, "歷史價格", null)); entries.add(new PieEntry(39.0f, "個性二維碼", null)); //二维数组 一级数据 PieDataSet dataSet = new PieDataSet(entries, "Election Results"); //扇页之间间距 //dataSet.setSliceSpace(3f); //dataSet.setSelectionShift(5f); //添加颜色 ArrayList colors = new ArrayList<>(); colors.add(Color.parseColor("#37F0A2")); colors.add(Color.parseColor("#49DBEE")); colors.add(Color.parseColor("#43C088")); dataSet.setColors(colors); //设置百分比线的位置，分别是拐角，长线和短线 dataSet.setValueLinePart1OffsetPercentage(80.f); dataSet.setValueLinePart1Length(0.3f); dataSet.setValueLinePart2Length(0.7f); //设置百分比线是在圆盘上还是圆盘外 //dataSet.setXValuePosition(PieDataSet.ValuePosition.OUTSIDE_SLICE); dataSet.setYValuePosition(PieDataSet.ValuePosition.OUTSIDE_SLICE); //设置饼状数据 PieData data = new PieData(dataSet); data.setValueFormatter(new PercentFormatter()); //data.setValueFormatter(new AssetsFormatter()); data.setValueTextSize(11f); data.setValueTextColor(Color.BLACK); pieChart.setData(data); //取消高亮 pieChart.highlightValues(null); //刷新UI pieChart.invalidate(); } //初始化折线配置 private void initLineChar() { //选中监听 //chart.setOnChartValueSelectedListener(this); //是否开启描述 chart.getDescription().setEnabled(false); chart.setDescription(null); //是否支持手势点击 chart.setTouchEnabled(true); //拖动摩擦系数，即拖动流畅度 chart.setDragDecelerationFrictionCoef(0.9f); //是否可以缩放和拖拽 chart.setDragEnabled(false); chart.setScaleEnabled(false); chart.setDrawGridBackground(false); chart.setHighlightPerDragEnabled(true); //如果禁用，可以分别在x轴和y轴上进行缩放 chart.setPinchZoom(true); //背景颜色 chart.setBackgroundColor(Color.TRANSPARENT); //动画 chart.animateX(700); //无数据文案 chart.setNoDataText("暫無數據"); //四周间距 //chart.setViewPortOffsets(10, 0, 0,10); //x轴配置 XAxis xAxis = chart.getXAxis(); //xAxis.setTypeface(tfLight); xAxis.setTextSize(11f); xAxis.setTextColor(Color.parseColor("#999999")); xAxis.setDrawGridLines(false); xAxis.setDrawAxisLine(false); //x轴刻度位置 xAxis.setPosition(XAxis.XAxisPosition.BOTTOM); xAxis.setAxisLineColor(Color.parseColor("#ECECEC")); xAxis.setGridColor(Color.parseColor("#ECECEC")); //Y轴左边线配置 YAxis leftAxis = chart.getAxisLeft(); //leftAxis.setTypeface(tfLight); leftAxis.setTextColor(Color.parseColor("#999999")); leftAxis.setAxisMaximum(200f); leftAxis.setAxisMinimum(0f); leftAxis.setDrawGridLines(true); leftAxis.setGranularityEnabled(false); leftAxis.setAxisLineColor(Color.TRANSPARENT); leftAxis.setGridColor(Color.parseColor("#ECECEC")); //禁用y轴右边线 YAxis rightAxis = chart.getAxisRight(); rightAxis.setEnabled(false); //图例 Legend legend = chart.getLegend(); legend.setEnabled(false); //设置折线数据 setLineData(); } //设置折线数据 private List allEntryList = new ArrayList<>(); private void setLineData() { //二维数组 二级数据1 ArrayList values1 = new ArrayList<>(); values1.add(new Entry(0, 12f)); values1.add(new Entry(1, 29f)); values1.add(new Entry(2, 19f)); values1.add(new Entry(3, 25f)); values1.add(new Entry(4, 18f)); //二维数组 二级数据2 ArrayList values2 = new ArrayList<>(); values2.add(new Entry(0, 16f)); values2.add(new Entry(1, 33f)); values2.add(new Entry(2, 11f)); values2.add(new Entry(3, 20f)); values2.add(new Entry(4, 26f)); List lineDataSetList = new ArrayList<>(); //第一条折线的数据 if (values1.size() > 0) { LineDataSet set1 = new LineDataSet(values1, null); //创建数据集并为其指定类型 set1.setAxisDependency(YAxis.AxisDependency.LEFT); //折线颜色 set1.setColor(Color.parseColor("#35E5FF")); //折线宽 set1.setLineWidth(2f); //折点是否填充，即实心还是空心 set1.setFillAlpha(80); //高亮颜色 set1.setHighLightColor(Color.TRANSPARENT); //绘制圆形孔 set1.setDrawCircleHole(false); //折点颜色 set1.setCircleColor(Color.parseColor("#FFBD02")); //折点半径 set1.setCircleRadius(3f); //格式化折点数据 //set1.setFillFormatter(new MyFillFormatter(0f)); //是否绘制水平方向的高亮线 set1.setDrawHorizontalHighlightIndicator(false); //该条折线是否可见 //set1.setVisible(false); //绘制平面填充区域 set1.setDrawFilled(true); if (Utils.getSDKInt() >= 18) { //仅在api级别18及以上版本上支持drawinables，渐变色drawable Drawable drawable = ContextCompat.getDrawable(this, R.drawable.line_fade_1); set1.setFillDrawable(drawable); } else { //纯色 set1.setFillColor(Color.parseColor("#35E5FF")); } //添加所有折线的集合 lineDataSetList.add(set1); } //第二条折线的数据 if (values2.size() > 0) { LineDataSet set2 = new LineDataSet(values2, null); set2.setAxisDependency(YAxis.AxisDependency.RIGHT); set2.setColor(Color.parseColor("#FFBD02")); set2.setCircleColor(Color.parseColor("#35E5FF")); set2.setLineWidth(2f); set2.setCircleRadius(3f); set2.setFillAlpha(80); set2.setDrawFilled(true); set2.setDrawCircleHole(false); set2.setHighLightColor(Color.TRANSPARENT); if (Utils.getSDKInt() >= 18) { //仅在api级别18及以上版本上支持drawinables，渐变色drawable Drawable drawable = ContextCompat.getDrawable(this, R.drawable.line_fade_2); set2.setFillDrawable(drawable); } else { set2.setFillColor(Color.parseColor("#FFBD02")); } lineDataSetList.add(set2); } //设置总数据 if (lineDataSetList.size() > 0) { LineDataSet[] lineDataSets = lineDataSetList.toArray(new LineDataSet[lineDataSetList.size()]); LineData data = new LineData(lineDataSets); data.setValueTextColor(Color.TRANSPARENT); data.setValueTextSize(9f); //这是折线数据 chart.setData(data); //设置x轴值 chart.getXAxis().setLabelCount(values1.size(), true); chart.getXAxis().setValueFormatter(new ValueFormatter() { @Override public String getFormattedValue(float value) { String[] monthArray = 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"}; int index = (int) value; return monthArray[index]; } }); //设置Y最大值 allEntryList.clear(); allEntryList.addAll(values1); allEntryList.addAll(values2); List floatYList = new ArrayList<>(); for (Entry entry : allEntryList) { floatYList.add(entry.getY()); } if (allEntryList.size() > 0) { //设置Y轴最大设置范围和格式化数据 chart.getAxisLeft().setAxisMaximum(Collections.max(floatYList) + 10); chart.getAxisLeft().setValueFormatter(new ValueFormatter() { @Override public String getFormattedValue(float v) { return String.valueOf(v); } }); } } else { chart.setData(null); } //刷新图表 chart.invalidate(); }} 六 折线图进阶，添加平均值限制线
1 效果图
2 直接上配置吧
package com.xixia.chart;import android.content.Context;import android.graphics.Color;import com.github.mikephil.charting.charts.LineChart;import com.github.mikephil.charting.components.Legend;import com.github.mikephil.charting.components.LimitLine;import com.github.mikephil.charting.components.XAxis;import com.github.mikephil.charting.components.YAxis;import com.github.mikephil.charting.data.Entry;import com.github.mikephil.charting.data.LineData;import com.github.mikephil.charting.data.LineDataSet;import com.github.mikephil.charting.formatter.IndexAxisValueFormatter;import com.github.mikephil.charting.utils.ColorTemplate;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Calendar;import java.util.Collections;import java.util.Date;import java.util.List;import java.util.Locale;public class LineChartViewUtils { private Context context; public LineChartViewUtils(Context context) { this.context=context; } //配置折线数据 private void initChart(LineChart chart) { //关闭描述 chart.getDescription().setEnabled(false); //关闭高亮 chart.setHighlightPerDragEnabled(false); //关闭图例 Legend l = chart.getLegend(); l.setEnabled(false); //x轴数据 XAxis xAxis = chart.getXAxis(); xAxis.setPosition(XAxis.XAxisPosition.BOTH_SIDED); xAxis.setTextSize(10f); xAxis.setTextColor(Color.parseColor("#999999")); xAxis.setDrawAxisLine(true); xAxis.setAxisLineColor(Color.parseColor("#DADADA")); xAxis.setAxisLineWidth(0.5f); xAxis.setDrawGridLines(true); xAxis.setGridColor(Color.parseColor("#DADADA")); xAxis.setGridLineWidth(0.5f); chart.getXAxis().setValueFormatter(indexAxisValueFormatter); //Y轴数据 YAxis leftAxis = chart.getAxisLeft(); leftAxis.setEnabled(true); leftAxis.setPosition(YAxis.YAxisLabelPosition.INSIDE_CHART); leftAxis.setTextColor(Color.TRANSPARENT); leftAxis.setDrawGridLines(false); leftAxis.setDrawAxisLine(false); //最小Y轴 //leftAxis.setAxisMinimum(0f); //最大Y轴 //leftAxis.setAxisMaximum(170f); //Y轴偏移 //leftAxis.setYOffset(-9f); //关闭右边Y轴数值显示 YAxis rightAxis = chart.getAxisRight(); rightAxis.setEnabled(true); rightAxis.setPosition(YAxis.YAxisLabelPosition.INSIDE_CHART); rightAxis.setTextColor(Color.TRANSPARENT); rightAxis.setDrawGridLines(false); rightAxis.setDrawAxisLine(false); } int position = 0; //时间格式化 SimpleDateFormat mFormatHour = new SimpleDateFormat("HH:mm", Locale.ENGLISH); SimpleDateFormat mFormatMonth = new SimpleDateFormat("MM/dd", Locale.ENGLISH); SimpleDateFormat mFormatYear = new SimpleDateFormat("MM", Locale.ENGLISH); IndexAxisValueFormatter indexAxisValueFormatter = new IndexAxisValueFormatter() { @Override public String getFormattedValue(float value) { String valueString = ""; long millis = System.currentTimeMillis(); switch (position) { case 0: case 1: valueString = mFormatHour.format(new Date(millis)); break; case 2: valueString = getWeekOfDate(millis); break; case 3: valueString = mFormatMonth.format(new Date(millis)); break; case 4: valueString = mFormatYear.format(new Date(millis)); break; } return valueString; } }; //根据时间戳获取星期 public static String getWeekOfDate(long timestamp) { String[] weekDays = {"周日", "周一", "周二", "周三", "周四", "周五", "周六"}; Calendar cal = Calendar.getInstance(); cal.setTime(new Date(timestamp)); int w = cal.get(Calendar.DAY_OF_WEEK) - 1; if (w < 0) w = 0; return weekDays[w]; } //设置数据 public void setCharDataList(LineChart chart, ArrayList entryList, List valueList, float allValue, String unit) { //平均值 float average = allValue / 10; LimitLine limitLine = new LimitLine(average, average + unit + " 平均"); limitLine.enableDashedLine(10f, 10f, 0f); if (Collections.max(valueList) - average > 0.3) { limitLine.setLabelPosition(LimitLine.LimitLabelPosition.LEFT_TOP); } else { limitLine.setLabelPosition(LimitLine.LimitLabelPosition.LEFT_BOTTOM); } limitLine.setTextSize(10f); limitLine.setLineColor(Color.parseColor("#6b9cdf")); limitLine.setLineWidth(0.5f); limitLine.setTextSize(10); limitLine.setTextColor(Color.parseColor("#6b9cdf")); limitLine.setYOffset(10); //Y轴左右平均值数据 YAxis leftAxis = chart.getAxisLeft(); YAxis rightAxis = chart.getAxisRight(); leftAxis.removeAllLimitLines(); rightAxis.removeAllLimitLines(); leftAxis.setDrawLimitLinesBehindData(true); rightAxis.setDrawLimitLinesBehindData(true); //Y轴左右添加平均线 leftAxis.addLimitLine(limitLine); rightAxis.addLimitLine(limitLine); //填充数据 LineDataSet set1 = new LineDataSet(entryList, "DataSet 1"); set1.setAxisDependency(YAxis.AxisDependency.LEFT); set1.setColor(ColorTemplate.getHoloBlue()); set1.setValueTextColor(ColorTemplate.getHoloBlue()); set1.setLineWidth(1f); set1.setDrawCircles(false); set1.setDrawValues(false); set1.setFillAlpha(65); set1.setFillColor(Color.parseColor("#6b9cdf")); set1.setHighLightColor(Color.parseColor("#6b9cdf")); set1.setDrawCircleHole(false); //使用数据集创建数据对象 LineData data = new LineData(set1); data.setValueTextColor(Color.WHITE); data.setValueTextSize(9f); //这是折线数据 chart.setData(data); //动画 //chart.animateX(1000); //chart.animateY(1000); //更新图表UI chart.invalidate(); } //点击事件 private void onViewClick(){ setData(0); } //设置温度，湿度，华氏度图表数据 public void setData(int tabSelectPosition) { //温度℃ ArrayList valuesTemperature = new ArrayList<>();//温度图表数据 float allValueTemperature = 0;//温度平均值 List temperatureList = new ArrayList<>();//温度集合 //温度F ArrayList valuesTemperatureFF = new ArrayList<>();//温度图表数据 float allValueTemperatureFF = 0;//温度平均值 List temperatureListFF = new ArrayList<>();//温度集合 //湿度 ArrayList valuesHumidity = new ArrayList<>();//湿度图表数据 float allValueHumidity = 0;//湿度平均值 List humidityList = new ArrayList<>();//湿度集合 //温度合集 List list = new ArrayList<>(); list.add("50"); list.add("20"); list.add("40"); list.add("60"); list.add("40"); list.add("30"); for (int i = 0; i < list.size(); i++) { String temperature = list.get(i); String humidity = String.valueOf(Math.random()); //温度℃ temperatureList.add(Float.valueOf(temperature)); allValueTemperature += Float.parseFloat(temperature); valuesTemperature.add(new Entry(i, Float.parseFloat(temperature))); //温度℉ temperatureListFF.add(Float.valueOf(temperature) * 1.8f + 32); allValueTemperatureFF += Float.parseFloat(temperature) * 1.8f + 32; valuesTemperatureFF.add(new Entry(i, Float.parseFloat(temperature) * 1.8f + 32)); //湿度 humidityList.add(Float.valueOf(humidity)); allValueHumidity += Float.parseFloat(humidity); valuesHumidity.add(new Entry(i, Float.parseFloat(humidity))); } int positon = 0; switch (positon) { case 0: setCharDataList(new LineChart(context), valuesTemperatureFF, temperatureListFF, allValueTemperatureFF, "℉"); break; case 1: setCharDataList(new LineChart(context), valuesTemperature, temperatureList, allValueTemperature, "℃"); break; case 2: setCharDataList(new LineChart(context), valuesHumidity, humidityList, allValueHumidity, "%"); break; } }} 七 折线图边框和平滑曲线示例
1 效果图
7.2 布局文件xml
3 自定义标记控件CustomMarkerView.java
public class CustomMarkerView extends MarkerView { private TextView textView; private IAxisValueFormatter iAxisValueFormatter; private DecimalFormat format;//数字格式化 public CustomMarkerView(Context context,IAxisValueFormatter iAxisValueFormatter) { super(context,R.layout.custom_marker_view_layout); this.iAxisValueFormatter=iAxisValueFormatter; textView=(TextView)findViewById(R.id.contentview); format=new DecimalFormat("###.0");//定义数字格式 } @Override //进行重绘 public void refreshContent(Entry e, Highlight highlight) { textView.setText(format.format(e.getY())); super.refreshContent(e, highlight); } @Override public MPPointF getOffset() { return new MPPointF(-(getWidth()/2),-getHeight()); }}4 配置
public class Fragment1{ private void initLineChar() { chart.setOnChartValueSelectedListener(new OnChartValueSelectedListener() { @Override public void onValueSelected(Entry e, Highlight h) { Highlight[] highlights=chart.getHighlighted(); chart.highlightValues(highlights); } @Override public void onNothingSelected() { } }); // no description text chart.getDescription().setEnabled(false); chart.setDescription(null); // enable touch gestures chart.setTouchEnabled(true); //chart.setDragDecelerationFrictionCoef(0.9f); // enable scaling and dragging chart.setDragEnabled(false); chart.setScaleEnabled(false); chart.setDrawGridBackground(false);// chart.setHighlightPerDragEnabled(true);// chart.setHighlightPerTapEnabled(true); // if disabled, scaling can be done on x- and y-axis separately //chart.setPinchZoom(true); CustomMarkerView marker=new CustomMarkerView(getActivity(), new IAxisValueFormatter() { @Override public String getFormattedValue(float value, AxisBase axis) { return ""+value; } }); marker.setChartView(chart); chart.setMarker(marker); // set an alternative background color chart.setBackgroundColor(Color.TRANSPARENT); chart.animateX(700); //chart.setNoDataText("No Data"); XAxis xAxis = chart.getXAxis(); //xAxis.setTypeface(tfLight); xAxis.setTextSize(11f); xAxis.setTextColor(Color.parseColor("#9999AA")); xAxis.setDrawGridLines(false); xAxis.setDrawAxisLine(true); xAxis.setPosition(XAxis.XAxisPosition.BOTTOM); xAxis.setAxisLineColor(Color.parseColor("#9999AA")); xAxis.setGridColor(Color.parseColor("#9999AA")); YAxis leftAxis = chart.getAxisLeft(); leftAxis.setMaxWidth(0.01f); leftAxis.setMinWidth(0.01f); leftAxis.setDrawGridLines(false); leftAxis.setDrawAxisLine(true); leftAxis.setTextColor(Color.TRANSPARENT); leftAxis.setEnabled(true); leftAxis.setValueFormatter(new ValueFormatter() { @Override public String getFormattedValue(float value, Entry entry, int dataSetIndex, ViewPortHandler viewPortHandler) { return null; } }); YAxis rightAxis = chart.getAxisRight(); rightAxis.setTextColor(Color.parseColor("#9999AA"));// rightAxis.setDrawGridLines(true);// rightAxis.setGranularityEnabled(false); rightAxis.setAxisLineColor(getResources().getColor(R.color.color_9999aa)); rightAxis.setGridColor(Color.parseColor("#9999AA")); //图例 Legend legend = chart.getLegend(); legend.setEnabled(false); setLineData(); } private void setLineData() { ArrayList values1 = new ArrayList<>(); values1.add(new Entry(0, 0)); values1.add(new Entry(1, 100000)); values1.add(new Entry(2, 200000)); values1.add(new Entry(3, 400000)); values1.add(new Entry(4, 204000)); updateData(values1); } private void updateData(ArrayList values1) { if (values1.size() > 0) { LineDataSet set1 = new LineDataSet(values1, null); set1.setMode(LineDataSet.Mode.HORIZONTAL_BEZIER); // create a dataset and give it a type// set1.setAxisDependency(YAxis.AxisDependency.LEFT); set1.setColor(Color.parseColor("#9999AA")); set1.setCircleColor(Color.parseColor("#9999AA")); set1.setLineWidth(2f); set1.setCircleRadius(3f); set1.setFillAlpha(80); set1.setHighLightColor(Color.parseColor("#9999AA")); set1.setDrawHorizontalHighlightIndicator(false); set1.setDrawVerticalHighlightIndicator(true); set1.setHighlightEnabled(true); set1.setDrawCircleHole(false); set1.setDrawIcons(false); set1.setDrawCircles(false); set1.setDrawValues(true); set1.setDrawFilled(false); //set1.setFillFormatter(new MyFillFormatter(0f)); //set1.setVisible(false); set1.setCircleHoleColor(Color.parseColor("#00020C")); LineData data = new LineData(set1); data.setDrawValues(false); //data.setValueTextColor(Color.parseColor("#FFBD02")); data.setValueTextSize(9f); data.setHighlightEnabled(true); // set data chart.setData(data);// chart.getAxisRight().setAxisMaximum(500000); chart.getAxisRight().setAxisMinimum(0f); chart.getAxisRight().setValueFormatter(new ValueFormatter() { @Override public String getFormattedValue(float value, AxisBase axis) { return String.valueOf(value); } }); //设置x轴值 chart.getXAxis().setLabelCount(values1.size(), true); chart.getXAxis().setValueFormatter(new ValueFormatter() { @Override public String getFormattedValue(float value) { String[] monthArray = new String[]{"D", "W", "M", "6M", "1Y"}; int index = (int) value; return monthArray[index]; } }); }else { chart.setData(null); } chart.invalidate(); }} 八 圆环进度图表，带圆角和不带圆角
1 带圆角效果图
8.2 自定义圆环类，有圆角，上面第一个图的样式
public class CircleProgressView extends View { private Paint mBackPaint, mProgPaint; // 绘制画笔 private RectF mRectF; // 绘制区域 private int[] mColorArray; // 圆环渐变色 private int mProgress; // 圆环进度(0-100) public CircleProgressView(Context context) { this(context, null); } public CircleProgressView(Context context, @Nullable AttributeSet attrs) { this(context, attrs, 0); } public CircleProgressView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.CircularProgressView); // 初始化背景圆环画笔 mBackPaint = new Paint(); mBackPaint.setStyle(Paint.Style.STROKE); // 只描边，不填充 mBackPaint.setStrokeCap(Paint.Cap.ROUND); // 设置圆角 mBackPaint.setAntiAlias(true); // 设置抗锯齿 mBackPaint.setDither(true); // 设置抖动 mBackPaint.setStrokeWidth(typedArray.getDimension(R.styleable.CircularProgressView_backWidth, 5)); mBackPaint.setColor(typedArray.getColor(R.styleable.CircularProgressView_backColor, Color.LTGRAY)); // 初始化进度圆环画笔 mProgPaint = new Paint(); mProgPaint.setStyle(Paint.Style.STROKE); // 只描边，不填充 mProgPaint.setStrokeCap(Paint.Cap.ROUND); // 设置圆角 mProgPaint.setAntiAlias(true); // 设置抗锯齿 mProgPaint.setDither(true); // 设置抖动 mProgPaint.setStrokeWidth(typedArray.getDimension(R.styleable.CircularProgressView_progWidth, 10)); mProgPaint.setColor(typedArray.getColor(R.styleable.CircularProgressView_progColor, Color.BLUE)); // 初始化进度圆环渐变色 int startColor = typedArray.getColor(R.styleable.CircularProgressView_progStartColor, -1); int firstColor = typedArray.getColor(R.styleable.CircularProgressView_progFirstColor, -1); if (startColor != -1 && firstColor != -1) mColorArray = new int[]{startColor, firstColor}; else mColorArray = null; // 初始化进度 mProgress = typedArray.getInteger(R.styleable.CircularProgressView_progress, 0); typedArray.recycle(); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); int viewWide = getMeasuredWidth() - getPaddingLeft() - getPaddingRight(); int viewHigh = getMeasuredHeight() - getPaddingTop() - getPaddingBottom(); int mRectLength = (int) ((viewWide > viewHigh ? viewHigh : viewWide) - (mBackPaint.getStrokeWidth() > mProgPaint.getStrokeWidth() ? mBackPaint.getStrokeWidth() : mProgPaint.getStrokeWidth())); int mRectL = getPaddingLeft() + (viewWide - mRectLength) / 2; int mRectT = getPaddingTop() + (viewHigh - mRectLength) / 2; mRectF = new RectF(mRectL, mRectT, mRectL + mRectLength, mRectT + mRectLength); // 设置进度圆环渐变色 if (mColorArray != null && mColorArray.length > 1) mProgPaint.setShader(new LinearGradient(0, 0, 0, getMeasuredWidth(), mColorArray, null, Shader.TileMode.MIRROR)); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); canvas.drawArc(mRectF, 0, 360, false, mBackPaint); canvas.drawArc(mRectF, 275, 360 * mProgress / 100, false, mProgPaint); } // --------------------------------------------------------------------------------------------- public int getProgress() { return mProgress; } public void setProgress(int progress) { this.mProgress = progress; invalidate(); } public void setProgress(int progress, long animTime) { if (animTime <= 0) setProgress(progress); else { ValueAnimator animator = ValueAnimator.ofInt(mProgress, progress); animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator animation) { mProgress = (int) animation.getAnimatedValue(); invalidate(); } }); animator.setInterpolator(new OvershootInterpolator()); animator.setDuration(animTime); animator.start(); } } public void setBackWidth(int width) { mBackPaint.setStrokeWidth(width); invalidate(); } public void setBackColor(@ColorRes int color) { mBackPaint.setColor(ContextCompat.getColor(getContext(), color)); invalidate(); } public void setProgWidth(int width) { mProgPaint.setStrokeWidth(width); invalidate(); } public void setProgColor(@ColorRes int color) { mProgPaint.setColor(ContextCompat.getColor(getContext(), color)); mProgPaint.setShader(null); invalidate(); } public void setProgColor(@ColorRes int startColor, @ColorRes int firstColor) { mColorArray = new int[]{ContextCompat.getColor(getContext(), startColor), ContextCompat.getColor(getContext(), firstColor)}; mProgPaint.setShader(new LinearGradient(0, 0, 0, getMeasuredWidth(), mColorArray, null, Shader.TileMode.MIRROR)); invalidate(); } public void setProgColor(@ColorRes int[] colorArray) { if (colorArray == null || colorArray.length < 2) return; mColorArray = new int[colorArray.length]; for (int index = 0; index < colorArray.length; index++) mColorArray[index] = ContextCompat.getColor(getContext(), colorArray[index]); mProgPaint.setShader(new LinearGradient(0, 0, 0, getMeasuredWidth(), mColorArray, null, Shader.TileMode.MIRROR)); invalidate(); }}3 使用：
xml添加控件
java设置圆环进度：
CircleProgressView cpProgress = (CircleProgressView) findViewById(R.id.cp_progress);cpProgress.setProgress((int) (30/60f*100));4 不带圆角效果图
8.5 xml添加组件
java设置进度
CircleProgressView cpProgress = (CircleProgressView) findViewById(R.id.cp_progress);cpProgress.setProgress((int) (30/80f*100));九 仪表图
1 效果图
2 自定义仪表盘View
public class DashboardView3 extends BaseDashboardView { //外环画笔 private Paint mPaintOuterArc; //内环画笔 private Paint mPaintInnerArc; //进度点画笔 private Paint mPaintProgressPoint; //指示器画笔 private Paint mPaintIndicator; //外环区域 private RectF mRectOuterArc; //内环区域 private RectF mRectInnerArc; //圆环画笔颜色 private int mOuterArcColor; private int mProgressOuterArcColor; //内环画笔颜色 private int mInnerArcColor; private int mProgressInnerArcColor; //内外环之间的间距 private float mArcSpacing; //进度条的圆点属性 private float[] mProgressPointPosition; private float mProgressPointRadius; //指标器的Path private Path mIndicatorPath; //指示器的起始位置 private float mIndicatorStart; //默认圆环之间间距 private static final float DEFAULT_ARC_SPACING = 10; //外环的默认属性 private static final float DEFAULT_OUTER_ARC_WIDTH = 1.5f; private static final int DEFAULT_OUTER_ARC_COLOR = Color.argb(80, 255, 255, 255); //外环进度的默认属性 private static final int DEFAULT_PROGRESS_OUTER_ARC_COLOR = Color.argb(200, 255, 255, 255); //进度点的默认属性 private static final float DEFAULT_PROGRESS_POINT_RADIUS = 3; private static final int DEFAULT_PROGRESS_POINT_COLOR = Color.WHITE; //内环默认属性 private static final float DEFAULT_INNER_ARC_WIDTH = 1.5f; private static final int DEFAULT_INNER_ARC_COLOR = Color.argb(50, 255, 255, 255); //内环进度的默认属性 private static final int DEFAULT_PROGRESS_INNER_ARC_COLOR = Color.argb(170, 255, 255, 255); //指示器默认属性 private static final int DEFAULT_INDICATOR_COLOR = Color.argb(200, 255, 255, 255); public DashboardView3(Context context) { this(context, null); } public DashboardView3(Context context, @Nullable AttributeSet attrs) { this(context, attrs, 0); } public DashboardView3(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } @Override protected void initView() { //默认数据 mArcSpacing = dp2px(DEFAULT_ARC_SPACING); mOuterArcColor = DEFAULT_OUTER_ARC_COLOR; mProgressOuterArcColor = DEFAULT_PROGRESS_OUTER_ARC_COLOR; mProgressPointRadius = dp2px(DEFAULT_PROGRESS_POINT_RADIUS); mInnerArcColor = DEFAULT_INNER_ARC_COLOR; mProgressInnerArcColor = DEFAULT_PROGRESS_INNER_ARC_COLOR; //初始化画笔 //外环画笔 mPaintOuterArc = new Paint(Paint.ANTI_ALIAS_FLAG); mPaintOuterArc.setStrokeWidth(dp2px(DEFAULT_OUTER_ARC_WIDTH)); mPaintOuterArc.setStyle(Paint.Style.STROKE); //内环画笔 mPaintInnerArc = new Paint(Paint.ANTI_ALIAS_FLAG); mPaintInnerArc.setStrokeWidth(dp2px(DEFAULT_INNER_ARC_WIDTH)); mPaintInnerArc.setStyle(Paint.Style.STROKE); mPaintInnerArc.setStrokeCap(Paint.Cap.ROUND); PathEffect mPathEffect = new DashPathEffect(new float[] { 10, 10 }, 0); mPaintInnerArc.setPathEffect(mPathEffect); //进度点画笔 mPaintProgressPoint = new Paint(Paint.ANTI_ALIAS_FLAG); mPaintProgressPoint.setStyle(Paint.Style.FILL); mPaintProgressPoint.setColor(DEFAULT_PROGRESS_POINT_COLOR); //指示器画笔 mPaintIndicator = new Paint(Paint.ANTI_ALIAS_FLAG); mPaintIndicator.setStrokeCap(Paint.Cap.SQUARE); mPaintIndicator.setColor(DEFAULT_INDICATOR_COLOR); mPaintIndicator.setStrokeWidth(dp2px(1)); //进度点的图片 mProgressPointPosition = new float[2]; } @Override protected void initArcRect(float left, float top, float right, float bottom) { //外环区域 mRectOuterArc = new RectF(left, top, right, bottom); initInnerRect(); } private void initInnerRect() { //内环位置 mRectInnerArc = new RectF(mRectOuterArc.left + mArcSpacing,mRectOuterArc.top + mArcSpacing, mRectOuterArc.right - mArcSpacing , mRectOuterArc.bottom - mArcSpacing); //指标器的路径 mIndicatorStart = mRectInnerArc.top + mArcSpacing / 2; mIndicatorPath = new Path(); mIndicatorPath.moveTo(mRadius, mIndicatorStart); mIndicatorPath.rLineTo(-dp2px(2), dp2px(5)); mIndicatorPath.rLineTo(dp2px(4), 0); mIndicatorPath.close(); } @Override protected void drawArc(Canvas canvas, float arcStartAngle, float arcSweepAngle) { //绘制圆环 mPaintOuterArc.setColor(mOuterArcColor); canvas.drawArc(mRectOuterArc, arcStartAngle, arcSweepAngle, false, mPaintOuterArc); //绘制内环 mPaintInnerArc.setColor(mInnerArcColor); canvas.drawArc(mRectInnerArc, arcStartAngle, arcSweepAngle, false, mPaintInnerArc); } @Override protected void drawProgressArc(Canvas canvas, float arcStartAngle, float progressSweepAngle) { //绘制进度点 if(progressSweepAngle == 0) { return; } Path path = new Path(); //添加进度圆环的区域 path.addArc(mRectOuterArc, arcStartAngle, progressSweepAngle); //计算切线值和为重 PathMeasure pathMeasure = new PathMeasure(path, false); pathMeasure.getPosTan(pathMeasure.getLength(), mProgressPointPosition, null); //绘制圆环 mPaintOuterArc.setColor(mProgressOuterArcColor); canvas.drawPath(path, mPaintOuterArc); //绘制进度点 if(mProgressPointPosition[0] != 0 && mProgressPointPosition[1] != 0) { canvas.drawCircle(mProgressPointPosition[0], mProgressPointPosition[1], mProgressPointRadius, mPaintProgressPoint); } //绘制内环 mPaintInnerArc.setColor(mProgressInnerArcColor); canvas.drawArc(mRectInnerArc, arcStartAngle, progressSweepAngle, false, mPaintInnerArc); //绘制指针 canvas.save(); canvas.rotate(arcStartAngle + progressSweepAngle - 270, mRadius, mRadius); mPaintIndicator.setStyle(Paint.Style.FILL); canvas.drawPath(mIndicatorPath, mPaintIndicator); mPaintIndicator.setStyle(Paint.Style.STROKE); canvas.drawCircle(mRadius, mIndicatorStart + dp2px(6) + 1, dp2px(2), mPaintIndicator); canvas.restore(); } @Override protected void drawText(Canvas canvas, int value, String valueLevel, String currentTime) { //绘制数值 float marginTop = mRadius + mTextSpacing; canvas.drawText(String.valueOf(value), mRadius, marginTop, mPaintValue); //绘制数值文字信息 if(!TextUtils.isEmpty(valueLevel)){ float margin = mRadius - mTextSpacing - getPaintHeight(mPaintValue, "9"); canvas.drawText(valueLevel, mRadius, margin, mPaintValueLevel); } //绘制日期 if(!TextUtils.isEmpty(currentTime)) { marginTop = marginTop + getPaintHeight(mPaintDate, currentTime) + mTextSpacing; canvas.drawText(currentTime, mRadius, marginTop, mPaintDate); } } public void setArcSpacing(float dpSize){ mArcSpacing = dp2px(dpSize); initInnerRect(); postInvalidate(); } public void setOuterArcPaint(float dpSize, @ColorInt int color){ mPaintOuterArc.setStrokeWidth(dp2px(dpSize)); mOuterArcColor = color; postInvalidate(); } public void setProgressOuterArcColor(@ColorInt int color){ mProgressOuterArcColor = color; postInvalidate(); } public void setInnerArcPaint(float dpSize, @ColorInt int color){ mPaintInnerArc.setStrokeWidth(dp2px(dpSize)); mInnerArcColor = color; postInvalidate(); } public void setProgressInnerArcPaint(@ColorInt int color){ mProgressInnerArcColor = color; postInvalidate(); } public void setInnerArcPathEffect(float[] intervals){ PathEffect mPathEffect = new DashPathEffect(intervals, 0); mPaintInnerArc.setPathEffect(mPathEffect); postInvalidate(); } public void setProgressPointPaint(float dpRadiusSize,@ColorInt int color){ mProgressPointRadius = dp2px(dpRadiusSize); mPaintProgressPoint.setColor(color); postInvalidate(); } public void setIndicatorPaint(@ColorInt int color){ mPaintIndicator.setColor(color); postInvalidate(); }}3 使用：
DashboardView3 dashboardView= findViewById(R.id.dv);dashboardView.setDateStrPattern("评估时间：2023-05-25");dashboardView.setValueLevelPattern("信用优秀");int max = dashboardView.getMax();int min = dashboardView.getMin();dashboardView.setValue(new Random().nextInt(max - min) + min, anim, reset);来源地址：https://blog.csdn.net/qq_29848853/article/details/130868720
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