1 2 package com.xxmassdeveloper.mpchartexample; 3 4 import android.Manifest; 5 import android.content.Intent; 6 import android.content.pm.PackageManager; 7 import android.graphics.Color; 8 import android.net.Uri; 9 import android.os.Bundle; 10 import androidx.core.content.ContextCompat; 11 import android.util.Log; 12 import android.view.Menu; 13 import android.view.MenuItem; 14 import android.view.WindowManager; 15 import android.widget.Toast; 16 17 import com.github.mikephil.charting.charts.LineChart; 18 import com.github.mikephil.charting.components.Legend; 19 import com.github.mikephil.charting.components.Legend.LegendForm; 20 import com.github.mikephil.charting.components.XAxis; 21 import com.github.mikephil.charting.components.YAxis; 22 import com.github.mikephil.charting.components.YAxis.AxisDependency; 23 import com.github.mikephil.charting.data.Entry; 24 import com.github.mikephil.charting.data.LineData; 25 import com.github.mikephil.charting.data.LineDataSet; 26 import com.github.mikephil.charting.highlight.Highlight; 27 import com.github.mikephil.charting.interfaces.datasets.ILineDataSet; 28 import com.github.mikephil.charting.listener.OnChartValueSelectedListener; 29 import com.github.mikephil.charting.utils.ColorTemplate; 30 import com.xxmassdeveloper.mpchartexample.notimportant.DemoBase; 31 32 public class RealtimeLineChartActivity extends DemoBase implements 33 OnChartValueSelectedListener { 34 35 private LineChart chart; 36 37 @Override onCreate(Bundle savedInstanceState)38 protected void onCreate(Bundle savedInstanceState) { 39 super.onCreate(savedInstanceState); 40 getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 41 WindowManager.LayoutParams.FLAG_FULLSCREEN); 42 setContentView(R.layout.activity_realtime_linechart); 43 44 setTitle("RealtimeLineChartActivity"); 45 46 chart = findViewById(R.id.chart1); 47 chart.setOnChartValueSelectedListener(this); 48 49 // enable description text 50 chart.getDescription().setEnabled(true); 51 52 // enable touch gestures 53 chart.setTouchEnabled(true); 54 55 // enable scaling and dragging 56 chart.setDragEnabled(true); 57 chart.setScaleEnabled(true); 58 chart.setDrawGridBackground(false); 59 60 // if disabled, scaling can be done on x- and y-axis separately 61 chart.setPinchZoom(true); 62 63 // set an alternative background color 64 chart.setBackgroundColor(Color.LTGRAY); 65 66 LineData data = new LineData(); 67 data.setValueTextColor(Color.WHITE); 68 69 // add empty data 70 chart.setData(data); 71 72 // get the legend (only possible after setting data) 73 Legend l = chart.getLegend(); 74 75 // modify the legend ... 76 l.setForm(LegendForm.LINE); 77 l.setTypeface(tfLight); 78 l.setTextColor(Color.WHITE); 79 80 XAxis xl = chart.getXAxis(); 81 xl.setTypeface(tfLight); 82 xl.setTextColor(Color.WHITE); 83 xl.setDrawGridLines(false); 84 xl.setAvoidFirstLastClipping(true); 85 xl.setEnabled(true); 86 87 YAxis leftAxis = chart.getAxisLeft(); 88 leftAxis.setTypeface(tfLight); 89 leftAxis.setTextColor(Color.WHITE); 90 leftAxis.setAxisMaximum(100f); 91 leftAxis.setAxisMinimum(0f); 92 leftAxis.setDrawGridLines(true); 93 94 YAxis rightAxis = chart.getAxisRight(); 95 rightAxis.setEnabled(false); 96 97 } 98 addEntry()99 private void addEntry() { 100 101 LineData data = chart.getData(); 102 103 if (data != null) { 104 105 ILineDataSet set = data.getDataSetByIndex(0); 106 // set.addEntry(...); // can be called as well 107 108 if (set == null) { 109 set = createSet(); 110 data.addDataSet(set); 111 } 112 113 data.addEntry(new Entry(set.getEntryCount(), (float) (Math.random() * 40) + 30f), 0); 114 data.notifyDataChanged(); 115 116 // let the chart know it's data has changed 117 chart.notifyDataSetChanged(); 118 119 // limit the number of visible entries 120 chart.setVisibleXRangeMaximum(120); 121 // chart.setVisibleYRange(30, AxisDependency.LEFT); 122 123 // move to the latest entry 124 chart.moveViewToX(data.getEntryCount()); 125 126 // this automatically refreshes the chart (calls invalidate()) 127 // chart.moveViewTo(data.getXValCount()-7, 55f, 128 // AxisDependency.LEFT); 129 } 130 } 131 createSet()132 private LineDataSet createSet() { 133 134 LineDataSet set = new LineDataSet(null, "Dynamic Data"); 135 set.setAxisDependency(AxisDependency.LEFT); 136 set.setColor(ColorTemplate.getHoloBlue()); 137 set.setCircleColor(Color.WHITE); 138 set.setLineWidth(2f); 139 set.setCircleRadius(4f); 140 set.setFillAlpha(65); 141 set.setFillColor(ColorTemplate.getHoloBlue()); 142 set.setHighLightColor(Color.rgb(244, 117, 117)); 143 set.setValueTextColor(Color.WHITE); 144 set.setValueTextSize(9f); 145 set.setDrawValues(false); 146 return set; 147 } 148 149 private Thread thread; 150 feedMultiple()151 private void feedMultiple() { 152 153 if (thread != null) 154 thread.interrupt(); 155 156 final Runnable runnable = new Runnable() { 157 158 @Override 159 public void run() { 160 addEntry(); 161 } 162 }; 163 164 thread = new Thread(new Runnable() { 165 166 @Override 167 public void run() { 168 for (int i = 0; i < 1000; i++) { 169 170 // Don't generate garbage runnables inside the loop. 171 runOnUiThread(runnable); 172 173 try { 174 Thread.sleep(25); 175 } catch (InterruptedException e) { 176 e.printStackTrace(); 177 } 178 } 179 } 180 }); 181 182 thread.start(); 183 } 184 185 @Override onCreateOptionsMenu(Menu menu)186 public boolean onCreateOptionsMenu(Menu menu) { 187 getMenuInflater().inflate(R.menu.realtime, menu); 188 return true; 189 } 190 191 @Override onOptionsItemSelected(MenuItem item)192 public boolean onOptionsItemSelected(MenuItem item) { 193 194 switch (item.getItemId()) { 195 case R.id.viewGithub: { 196 Intent i = new Intent(Intent.ACTION_VIEW); 197 i.setData(Uri.parse("https://github.com/PhilJay/MPAndroidChart/blob/master/MPChartExample/src/com/xxmassdeveloper/mpchartexample/RealtimeLineChartActivity.java")); 198 startActivity(i); 199 break; 200 } 201 case R.id.actionAdd: { 202 addEntry(); 203 break; 204 } 205 case R.id.actionClear: { 206 chart.clearValues(); 207 Toast.makeText(this, "Chart cleared!", Toast.LENGTH_SHORT).show(); 208 break; 209 } 210 case R.id.actionFeedMultiple: { 211 feedMultiple(); 212 break; 213 } 214 case R.id.actionSave: { 215 if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) { 216 saveToGallery(); 217 } else { 218 requestStoragePermission(chart); 219 } 220 break; 221 } 222 } 223 return true; 224 } 225 226 @Override saveToGallery()227 protected void saveToGallery() { 228 saveToGallery(chart, "RealtimeLineChartActivity"); 229 } 230 231 @Override onValueSelected(Entry e, Highlight h)232 public void onValueSelected(Entry e, Highlight h) { 233 Log.i("Entry selected", e.toString()); 234 } 235 236 @Override onNothingSelected()237 public void onNothingSelected() { 238 Log.i("Nothing selected", "Nothing selected."); 239 } 240 241 @Override onPause()242 protected void onPause() { 243 super.onPause(); 244 245 if (thread != null) { 246 thread.interrupt(); 247 } 248 } 249 } 250