我想将变量或dinamic参数引入Y轴（MPAndroidChart）。 params来自远程服务器，它们不是固定参数，因为它们是实时从传感器中捕获的“温度和湿度”，然后它在Mysql中分配，并从我的APP获取此数据后制作图表。
我想对如何制作它有任何帮助。我的代码是这样的：
对于方法CapatarParametros()中的参数（湿度和温度），使用loopj连接到服务器并获取数据：
List<String> allNames = new ArrayList<String>();
JSONArray cast = jsonobject.getJSONArray("result");
for (int i=0; i<cast.length(); i++) {
JSONObject parametrosdht11 = cast.getJSONObject(i);
String temperatura = parametrosdht11.getString("temperatura");
String humedad = parametrosdht11.getString("humedad");
allNames.add(temperatura);
allNames.add(humedad);
这段代码给我温度和温度。现在我需要获取这些参数并在Oncreate中添加到y轴（每个例子“温度”）：
LineChart lineChart = (LineChart) findViewById(R.id.chart);
ArrayList<Entry> entries = new ArrayList<>();
答案 0 :(得分：1)
public class DatosSensor extends AppCompatActivity {
private DrawerLayout drawerLayout;
private static final String SENSORS_URL = "http://.....";
// Progress Dialog Object
ProgressDialog prgDialog;
// Error Msg TextView Object
TextView errorMsg;
// Email Edit View Object
private String temeperatura;
ArrayList<Entry> temperature = new ArrayList<>();
ArrayList<Entry> yVals2 = new ArrayList<>();
LineChart mChart;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.actividad_datos_sensor);
String idObjeto = (String) getIntent().getExtras().getSerializable("IdentidadEnviada");
CaptarParametros(idObjeto);
mChart = (LineChart) findViewById(R.id.chart);
// no description text
mChart.setDescription("");
mChart.setNoDataTextDescription("You need to provide data for the chart.");
// enable touch gestures
mChart.setTouchEnabled(true);
mChart.setDragDecelerationFrictionCoef(0.9f);
// enable scaling and dragging
mChart.setDragEnabled(true);
mChart.setScaleEnabled(true);
mChart.setDrawGridBackground(false);
mChart.setHighlightPerDragEnabled(true);
// if disabled, scaling can be done on x- and y-axis separately
mChart.setPinchZoom(true);
// set an alternative background color
mChart.setBackgroundColor(Color.LTGRAY);
mChart.animateX(2500);
XAxis xAxis = mChart.getXAxis();
xAxis.setTextSize(11f);
xAxis.setPosition(XAxis.XAxisPosition.BOTTOM);
xAxis.setAxisMaxValue(100f);
xAxis.setAxisMinValue(0f);
xAxis.setTextColor(Color.WHITE);
xAxis.setDrawGridLines(false);
xAxis.setDrawAxisLine(false);
//modify leftYaxis range similarly others
YAxis leftAxis = mChart.getAxisLeft();
leftAxis.setTextColor(ColorTemplate.getHoloBlue());
leftAxis.setAxisMaxValue(100f);
leftAxis.setAxisMinValue(0f);
leftAxis.setDrawGridLines(false);
leftAxis.setGranularityEnabled(true);
YAxis rightAxis = mChart.getAxisRight();
rightAxis.setTextColor(Color.RED);
rightAxis.setAxisMaxValue(100f);
rightAxis.setAxisMinValue(0f);
rightAxis.setDrawGridLines(false);
rightAxis.setDrawZeroLine(false);
rightAxis.setGranularityEnabled(false);
// add data
setData();
}
private void CaptarParametros(String idObjeto) {
AsyncHttpClient client = new AsyncHttpClient();
RequestParams params = new RequestParams();
params.put(UtilitiesGlobal.SENSOR_ID, idObjeto);
RequestHandle post = client.post(this, SENSORS_URL, params, new JsonHttpResponseHandler() {
@Override
public void onStart() {
// called before request is started
}
@Override
public void onSuccess(int statusCode, Header[] headers, JSONObject response) {
// called when response HTTP status is "200 OK"
JSONObject jsonobject = null;
JSONObject dht11JSONbject = null;
JSONArray dht11JSONarray = null;
try {
jsonobject = new JSONObject(String.valueOf(response));
//dht11JSONbject = jsonobject.getJSONObject("result");
List<String> allNames = new ArrayList<String>();
JSONArray cast = jsonobject.getJSONArray("result");
for (int i=0; i<cast.length(); i++) {
JSONObject parametrosdht11 = cast.getJSONObject(i);
String temperatura = parametrosdht11.getString("temperatura");
String humedad = parametrosdht11.getString("humedad");
temperature.add(new Entry(Float.valueOf(i),Float.valueOf(temperatura)));
yVals2.add(new Entry(Float.valueOf(i),Float.valueOf(humedad)));
//rrefresh
mChart.notifyDataSetChanged();
//Log.i(UtilitiesGlobal.TAG, "onSuccess: loopj " + usuarioiJSONbject);
Log.i(UtilitiesGlobal.TAG, "onSuccess: loopj " +"temperatura: "+ temperatura +" humedad: " +humedad);
}
private void setData() {
//data set represents a lin
LineDataSet set1, set2;
// create a dataset and give it a type
//modifications with colour and stuf
set1 = new LineDataSet(temperature, "Temperatur");
set1.setAxisDependency(YAxis.AxisDependency.LEFT);
set1.setColor(ColorTemplate.getHoloBlue());
set1.setCircleColor(Color.WHITE);
set1.setLineWidth(2f);
set1.setCircleRadius(3f);
set1.setFillAlpha(65);
set1.setFillColor(ColorTemplate.getHoloBlue());
set1.setHighLightColor(Color.rgb(244, 117, 117));
set1.setDrawCircleHole(false);
// similar above
set2 = new LineDataSet(yVals2, "Humidity");
set2.setAxisDependency(YAxis.AxisDependency.RIGHT);
set2.setColor(Color.RED);
set2.setCircleColor(Color.WHITE);
set2.setLineWidth(2f);
set2.setCircleRadius(1f);
set2.setFillAlpha(65);
set2.setFillColor(Color.RED);
set2.setDrawCircleHole(false);
set2.setHighLightColor(Color.rgb(244, 117, 117));
//set2.setFillFormatter(new MyFillFormatter(900f));
ArrayList<ILineDataSet> dataSets = new ArrayList<ILineDataSet>();
dataSets.add(set1); // add the datasets
dataSets.add(set2);
// create a data object with the datasets
LineData data = new LineData(dataSets);
data.setValueTextColor(Color.WHITE);
data.setValueTextSize(9f);
// set data
Log.i("Lists Sizedata",temperature.size() + " and " + yVals2.size());
mChart.setData(data);
}
}
创建两个活动。一个用于图表，另一个用于Asyncronics。 DataSensor.java
public class DatosSensor extends AppCompatActivity implements onLoopjTaskFinished {
private onLoopjTaskFinished loopjListener;
private DrawerLayout drawerLayout;
ProgressDialog prgDialog;
TextView errorMsg;
private String temeperatura;
ArrayList<Entry> entries;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.actividad_datos_sensor);
String idObjeto = (String) getIntent().getExtras().getSerializable("IdentidadEnviada");
CaptarParametros(idObjeto);
LineChart lineChart = (LineChart) findViewById(R.id.chart);
entries = new ArrayList<>();
//entries.add(new Entry(60f, 0));
//entries.add(new Entry(6f, 1));
//entries.add(new Entry(6f, 2));
//entries.add(new Entry(2f, 3));
//entries.add(new Entry(18f, 4));
//entries.add(new Entry(60f, 5));
Log.i(UtilitiesGlobal.TAG, "onCreate: entries size = " + entries.size());
LineDataSet dataset = new LineDataSet(entries, "# of Calls");
ArrayList<String> labels = new ArrayList<String>();
LineData data = new LineData(labels, dataset);
dataset.setColors(ColorTemplate.COLORFUL_COLORS); //
dataset.setDrawCubic(true);
dataset.setDrawFilled(true);
lineChart.setData(data);
lineChart.animateY(5000);
//Toast.makeText(getApplicationContext(), idObjeto, Toast.LENGTH_LONG).show();
agregarToolbar();
@Override
public void onLoopjFinishedSuccess(JSONObject jsonObject) {
List<String> allNames = new ArrayList<String>();
JSONArray cast = null;
try {
cast = jsonObject.getJSONArray("result");
} catch (JSONException e) {
e.printStackTrace();
}
for (int i = 0; i < cast.length(); i++) {
JSONObject parametrosdht11 = null;
String temperatura = null;
String humedad = null;
try {
parametrosdht11 = cast.getJSONObject(i);
temperatura = parametrosdht11.getString("temperatura");
humedad = parametrosdht11.getString("humedad");
allNames.add(temperatura);
allNames.add(humedad);
float tempFloat = Float.parseFloat(temperatura);
entries.add(new Entry(tempFloat, i));
} catch (JSONException e) {
e.printStackTrace();
}
//Log.i(UtilitiesGlobal.TAG, "onSuccess: loopj " + usuarioiJSONbject);
Log.i(UtilitiesGlobal.TAG, "onSuccess: loopj " + "temperatura: " + temperatura + " humedad: " + humedad);
}
}
Interface (onLoopjTaskFinished)
public interface onLoopjTaskFinished {
void onLoopjFinishedSuccess(JSONObject jsonObject);
void onLoopjFinishedFailure(int statusCode);
}
我拿出一些不相关的代码，只是为了简化。