如何解决MpChart-使用setColors方法，LineChart不会为同一图形显示两种颜色
我正在使用MPChart库。但是，我想显示两种取决于Y轴值的线图。所以我的意思是，如果值> 60，则图形颜色应为绿色；如果值
我尝试了setColors()方法。而且我也尝试过Custom Render class。但不是可用。整个图形为灰色，而不是两种颜色。我的代码或理解上有问题吗？
以下我已发布代码。任何帮助将不胜感激。预先谢谢你。
public class MainActivity extends DemoBase implements SeekBar.OnSeekBarChangeListener,OnChartValueSelectedListener {
private LineChart chart;
private SeekBar seekBarX,seekBarY;
private TextView tvX,tvY;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_main);
setTitle("LineChart");
tvX = findViewById(R.id.tvXMax);
tvY = findViewById(R.id.tvYMax);
seekBarX = findViewById(R.id.seekBar1);
seekBarX.setOnSeekBarChangeListener(this);
seekBarY = findViewById(R.id.seekBar2);
seekBarY.setMax(90);
seekBarY.setOnSeekBarChangeListener(this);
{ // // Chart Style // //
chart = findViewById(R.id.chart1);
// background color
chart.setBackgroundColor(Color.WHITE);
// disable description text
chart.getDescription().setEnabled(false);
// enable touch gestures
chart.setTouchEnabled(false);
// set listeners
chart.setOnChartValueSelectedListener(this);
chart.setDrawGridBackground(false);
// enable scaling and dragging
chart.setDragEnabled(false);
chart.setScaleEnabled(false);
chart.getLegend().setEnabled(false);
// force pinch zoom along both axis
chart.setPinchZoom(false);
}
//ValueFormatter custom = new MyValueFormatter("T");
ValueFormatter custom = new DefaultValueFormatter(0);
XAxis xAxis;
{ // // X-Axis Style // //
xAxis = chart.getXAxis();
xAxis.setPosition(XAxis.XAxisPosition.BOTTOM);
xAxis.setTypeface(tfLight);
// xAxis.setAvoidFirstLastClipping(true);
xAxis.setDrawGridLines(false);
xAxis.setGranularity(1f); // only intervals of 1 day
xAxis.setLabelCount(10);
xAxis.setAxisMinimum(0);
xAxis.setAxisMaximum(10);
xAxis.setValueFormatter(new MyValueFormatter("T"));
}
YAxis yAxis;
{ // // Y-Axis Style // //
yAxis = chart.getAxisLeft();
// disable dual axis (only use LEFT axis)
chart.getAxisRight().setEnabled(false);
// horizontal grid lines
yAxis.enableGridDashedLine(10f,10f,0f);
// axis range
yAxis.setDrawAxisLine(false);
yAxis.setAxisMaximum(90f);
yAxis.setAxisMinimum(0f);
yAxis.setLabelCount(5,false);
yAxis.setValueFormatter(new MyValueFormatter(""));
}
{ // // Create Limit Lines // //
LimitLine ll1 = new LimitLine(60f,"Upper Limit");
ll1.setLineWidth(2f);
ll1.setLineColor(Color.rgb(91,235,240));
ll1.enableDashedLine(10f,0f);
ll1.setLabelPosition(LimitLine.LimitLabelPosition.RIGHT_TOP);
ll1.setTextSize(10f);
ll1.setTypeface(tfRegular);
// draw limit lines behind data instead of on top
yAxis.setDrawLimitLinesBehindData(true);
xAxis.setDrawLimitLinesBehindData(true);
// add limit lines
yAxis.addLimitLine(ll1);
}
//for x,y values
// create marker to display box when values are selected
MyMarkerView mv = new MyMarkerView(this,R.layout.custom_marker_view);
// Set the marker to the chart
mv.setChartView(chart);
chart.setMarker(mv);
// add data
seekBarX.setProgress(45);
seekBarY.setProgress(90);
setData(45,90);
// draw points over time
chart.animateX(1500);
}
@Override
protected void saveToGallery() {
saveToGallery(chart,"LineChartActivity1");
}
private void setData(int count,float range) {
ArrayList<Entry> values = new ArrayList<>();
List<Integer> colors = new ArrayList<>();
for (int i = 0; i < count; i++) {
float val = (float) (Math.random() * range);
values.add(new Entry(i,val,null));
if ( (int)val >= 60 ){
Log.d(">60","Red Color");
colors.add(ResourcesCompat.getColor(getResources(),R.color.color_green,null));
}else {
colors.add(ResourcesCompat.getColor(getResources(),R.color.color_gray,null));
//colors.add(getResources().getColor(R.color.color_gray));
}
}
LineDataSet set1;
if (chart.getData() != null &&
chart.getData().getDataSetCount() > 0) {
set1 = (LineDataSet) chart.getData().getDataSetByIndex(0);
set1.setValues(values);
set1.notifyDataSetChanged();
chart.getData().notifyDataChanged();
chart.notifyDataSetChanged();
} else {
// create a dataset and give it a type
set1 = new LineDataSet(values,""); //DataSet 1
set1.setMode(LineDataSet.Mode.CUBIC_BEZIER);
set1.setDrawFilled(false);
set1.setCubicIntensity(0.2f);
// black lines and points
set1.resetColors();
set1.setColors(colors); //201,195,195
set1.setDrawCircles(false);
set1.setLineWidth(2f);
// set1.setHighLightColor(Color.rgb(91,240));
set1.setDrawIcons(false);
// draw dashed line
set1.enableDashedLine(5f,0f,0f)
// draw points as solid circles
set1.setDrawCircleHole(false);
// text size of values
set1.setValueTextSize(9f);
// set the filled area
set1.setFillFormatter(new IFillFormatter() {
@Override
public float getFillLinePosition(ILineDataSet dataSet,LineDataProvider dataProvider) {
return chart.getAxisLeft().getAxisMinimum();
}
});
ArrayList<ILineDataSet> dataSets = new ArrayList<>();
dataSets.add(set1); // add the data sets
// create a data object with the data sets
LineData data = new LineData(dataSets);
// set data
data.setDrawValues(true);
chart.setData(data);
//chart.setRenderer(new ImageLineChartRenderer(chart,chart.getAnimator(),chart.getViewPortHandler()));
}
}
@Override
public void onProgressChanged(SeekBar seekBar,int i,boolean b) {
//tvX.setText(String.valueOf(seekBarX.getProgress()));
// tvY.setText(String.valueOf(seekBarY.getProgress()));
setData(seekBarX.getProgress(),seekBarY.getProgress());
// redraw
// chart.invalidate();
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {}
@Override
public void onValueSelected(Entry e,Highlight h) {
Log.i("Entry selected",e.toString());
Log.i("LOW HIGH","low: " + chart.getLowestVisibleX() + ",high: " + chart.getHighestVisibleX());
}
@Override
public void onNothingSelected() { Log.i("Nothing selected","Nothing selected.");}
}
解决方法
好像是代码逻辑错误，您只能在else条件下设置颜色。 onProgressChanged（）（然后是setData（））将多久调用一次？
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