如何在图表引擎折线图中显示刷新 web 服务值？
How to display refresh webservice value in achartengine line chart?
我有图表引擎折线图，我成功地在折线图中显示了来自 json 网络服务的值。但问题是当我回调 asynctask 然后折线图在 x y 轴上显示旧值。不显示新值。下面是我的代码。
public void charDeclaration() {
// For chart
LinearLayout layout = (LinearLayout) findViewById(R.id.chart);
if (myChart == null) {
initializeChartNew();
myChart = ChartFactory.getLineChartView(this, dataset,
multiRenderer);
layout.addView(myChart);
} else {
myChart.repaint();
}
}
@SuppressWarnings("deprecation")
private void initializeChartNew() {
// Creating an XYSeries for Income
fromTemp = new XYSeries("Temperature");
for (int i = 0; i < temp_time.size(); i++) {
fromTemp.add(i, Double.parseDouble(temp_details.get(i)));
System.out.println("Temperature Details in Charts "
+ temp_details.get(i));
}
// Creating a dataset to hold each series
dataset = new XYMultipleSeriesDataset();
// Adding Income Series to the dataset
dataset.addSeries(fromTemp);
// Creating XYSeriesRenderer to customize incomeSeries
from_tempRenderer = new XYSeriesRenderer();
from_tempRenderer.setColor(Color.WHITE);
from_tempRenderer.setPointStyle(PointStyle.CIRCLE);
from_tempRenderer.setFillPoints(true);
from_tempRenderer.setLineWidth(2);
from_tempRenderer.setChartValuesTextSize(20);
from_tempRenderer.setDisplayChartValues(true);
// Creating XYSeriesRenderer to customize expenseSeries
// Creating a XYMultipleSeriesRenderer to customize the whole chart
multiRenderer = new XYMultipleSeriesRenderer();
multiRenderer.setMargins(new int[] { 50, 50, 50, 50 });
multiRenderer.setYLabelsAlign(Align.RIGHT);
multiRenderer.setAxisTitleTextSize(20);
multiRenderer.setChartTitleTextSize(20);
multiRenderer.setLabelsTextSize(18);
multiRenderer.setLegendTextSize(18);
multiRenderer.setXLabels(0);
for (int k = 0; k < temp_date.size(); k++) {
multiRenderer.setChartTitle(temp_date.get(k));
System.out
.println("Temperature Date in Charts " + temp_date.get(k));
}
multiRenderer.setXTitle("Time");
multiRenderer.setYTitle("Temperature");
multiRenderer.setYLabelsPadding(5);
multiRenderer.setZoomButtonsVisible(true);
multiRenderer.setPointSize(5);
for (int i = 0; i < temp_time.size(); i++) {
multiRenderer.addXTextLabel(i, temp_time.get(i));
}
System.out.println("value of temp_details " + temp_details.size());
multiRenderer.removeSeriesRenderer(from_tempRenderer);
multiRenderer.addSeriesRenderer(from_tempRenderer);
}
Below is my AsyncTask
private class TemperatureDetails extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity_New.this);
pDialog.setMessage("Please Wait...");
pDialog.setCancelable(false);
pDialog.setIndeterminate(false);
pDialog.setCanceledOnTouchOutside(false);
pDialog.show();
// building_segment_id="";
/*
* temp_details.clear(); date_time.clear(); temp_date.clear();
* temp_time.clear();
*/
}
@Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
try {
System.out
.println("Temp Building Seg ID" + building_segment_id);
// String temperature_url =
// "http://www.intelatrek.com:98/Service1.svc/TempratueList?BeconID=329%20King&Date=2015-04-09";
String temp_url = "http://db.stat-systems.co.nz:81/Service1.svc/TempratureList?BeconID="
+ building_segment_id + "&Date=2015-04-13";
System.out.println("BlucatID in Asynctask " + blucat_id);
System.out.println("building_segment_id in AsyncTask "
+ building_segment_id);
temp_details.clear();
date_time.clear();
temp_date.clear();
temp_time.clear();
JSONObject jObject = JSONParser.getJsonFromURL(temp_url);
tempjsonflag = jObject.getString("Flag");
JSONArray jArray = jObject.getJSONArray("TempTransList");
for (int i = 0; i < jArray.length(); i++) {
JSONObject job = jArray.getJSONObject(i);
String BuildingId = job.getString("BuildingId");
String BuildingSegmentId = job
.getString("BuildingSegmentId");
// String Customer_ID = job.getString("Customer_ID");
String DateTime = job.getString("DateTime");
// String InnerLocationId =
// job.getString("InnerLocationId");
String Temp_Date = job.getString("TempDate");
String Temp_Time = job.getString("TempTime");
String Temperature = job.getString("Temperature");
temp_details.add(Temperature);
date_time.add(DateTime);
temp_date.add(Temp_Date);
temp_time.add(Temp_Time);
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
if (pDialog != null) {
pDialog.dismiss();
}
for (int i = 0; i < temp_details.size(); i++) {
System.out
.println("Temperature Details " + temp_details.get(i));
System.out.println("Temperature Date Time " + date_time.get(i));
System.out.println("Temperature Temp Date " + temp_date.get(i));
System.out.println("Temperature Temp Time " + temp_time.get(i));
}
System.out.println("Temp Details " + temp_details.size());
System.out.println("Temp Date Time " + date_time.size());
System.out.println("Temp Temp Date " + temp_date.size());
System.out.println("Temp Temp Time " + temp_time.size());
System.out.println("Temp JSON FLAG " + tempjsonflag);
// if(tempjsonflag.equals("Success")){
if (tempe_detail.toString().equals("")) {
temp_textview_temperature.setVisibility(View.GONE);
temp_textview_notfound.setVisibility(View.VISIBLE);
imageview_degree.setVisibility(View.GONE);
/*
* LinearLayout layout = (LinearLayout)
* findViewById(R.id.chart);
*/
chart.setVisibility(View.GONE);
} else {
temp_textview_notfound.setVisibility(View.GONE);
temp_textview_temperature.setVisibility(View.VISIBLE);
temp_textview_temperature.setText(tempe_detail);
temp_textview_temperature.setTextSize(70);
imageview_degree.setVisibility(View.VISIBLE);
// temp_textview_temperature.setLayoutParams(llp);
/*
* LinearLayout layout = (LinearLayout)
* findViewById(R.id.chart);
*/
chart.setVisibility(View.VISIBLE);
charDeclaration();
}
if (temp_textview_temperature.getText().toString().equals("1")) {
temp_textview_temperature.setPadding(25, 0, 0, 0);
} else if (temp_textview_temperature.getText().toString()
.equals("2")) {
temp_textview_temperature.setPadding(25, 0, 0, 0);
} else if (temp_textview_temperature.getText().toString()
.equals("3")) {
temp_textview_temperature.setPadding(25, 0, 0, 0);
} else if (temp_textview_temperature.getText().toString()
.equals("4")) {
temp_textview_temperature.setPadding(25, 0, 0, 0);
} else if (temp_textview_temperature.getText().toString()
.equals("5")) {
temp_textview_temperature.setPadding(25, 0, 0, 0);
} else if (temp_textview_temperature.getText().toString()
.equals("6")) {
temp_textview_temperature.setPadding(25, 0, 0, 0);
} else if (temp_textview_temperature.getText().toString()
.equals("7")) {
temp_textview_temperature.setPadding(25, 0, 0, 0);
} else if (temp_textview_temperature.getText().toString()
.equals("8")) {
temp_textview_temperature.setPadding(25, 0, 0, 0);
} else if (temp_textview_temperature.getText().toString()
.equals("9")) {
temp_textview_temperature.setPadding(25, 0, 0, 0);
} else {
temp_textview_temperature.setPadding(0, 0, 0, 0);
}
int dip = (int) TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_DIP, (float) 1, getResources()
.getDisplayMetrics());
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
int widthPixels = dm.widthPixels;
int heightPixels = dm.widthPixels;
float scaleFactor = dm.density;
float widthInches = widthPixels / scaleFactor;
if (widthInches >= 720) {
// 10" tablet resolutions
if (tempe_detail.toString().equals("")) {
temp_textview_temperature.setVisibility(View.GONE);
temp_textview_notfound.setVisibility(View.VISIBLE);
imageview_degree.setVisibility(View.GONE);
// temp_textview_notfound.setText(60);
chart.setVisibility(View.GONE);
} else {
temp_textview_notfound.setVisibility(View.GONE);
temp_textview_temperature.setVisibility(View.VISIBLE);
temp_textview_temperature.setText(tempe_detail);
if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
// Do some stuff
temp_textview_temperature.setTextSize(70);
imageview_degree.getLayoutParams().height = 30;
imageview_degree.getLayoutParams().width = 30;
} else {
temp_textview_temperature.setTextSize(180);
imageview_degree.getLayoutParams().height = 50;
imageview_degree.getLayoutParams().width = 50;
}
imageview_degree.setVisibility(View.VISIBLE);
// temp_textview_temperature.setLayoutParams(llp);
chart.setVisibility(View.VISIBLE);
charDeclaration();
}
if (temp_textview_temperature.getText().toString()
.matches("[0-9.]*")) {
temp_textview_temperature.setPadding(0, 0, 0, 0);
} else if (temp_textview_temperature.getText().length() == 3) {
temp_textview_temperature.setPadding(20, 0, 0, 0);
} else {
temp_textview_temperature.setPadding(0, 0, 0, 0);
}
} else if (widthInches >= 600) {
// 7" tablet resolutions
if (tempe_detail.toString().equals("")) {
temp_textview_temperature.setVisibility(View.GONE);
temp_textview_notfound.setVisibility(View.VISIBLE);
imageview_degree.setVisibility(View.GONE);
chart.setVisibility(View.GONE);
} else {
temp_textview_notfound.setVisibility(View.GONE);
temp_textview_temperature.setVisibility(View.VISIBLE);
temp_textview_temperature.setText(tempe_detail);
temp_textview_temperature.setTextSize(140);
imageview_degree.setVisibility(View.VISIBLE);
// temp_textview_temperature.setLayoutParams(llp);
chart.setVisibility(View.VISIBLE);
charDeclaration();
}
if (temp_textview_temperature.getText().toString()
.matches("[0-9.]*")) {
temp_textview_temperature.setPadding(25, 0, 0, 0);
if (temp_textview_temperature.getText().length() == 3) {
temp_textview_temperature.setPadding(0, 0, 0, 0);
}
}
else {
temp_textview_temperature.setPadding(0, 0, 0, 0);
}
}
// }
}
}
在日期更改后使用 myChart.repaint(); 重绘图表，如果重绘不起作用，那么在重绘图表之前尝试使用 removeAllViews() 到图表的父布局。
chartlayout.removeAllViews();
我有图表引擎折线图，我成功地在折线图中显示了来自 json 网络服务的值。但问题是当我回调 asynctask 然后折线图在 x y 轴上显示旧值。不显示新值。下面是我的代码。
public void charDeclaration() {
// For chart
LinearLayout layout = (LinearLayout) findViewById(R.id.chart);
if (myChart == null) {
initializeChartNew();
myChart = ChartFactory.getLineChartView(this, dataset,
multiRenderer);
layout.addView(myChart);
} else {
myChart.repaint();
}
}
@SuppressWarnings("deprecation")
private void initializeChartNew() {
// Creating an XYSeries for Income
fromTemp = new XYSeries("Temperature");
for (int i = 0; i < temp_time.size(); i++) {
fromTemp.add(i, Double.parseDouble(temp_details.get(i)));
System.out.println("Temperature Details in Charts "
+ temp_details.get(i));
}
// Creating a dataset to hold each series
dataset = new XYMultipleSeriesDataset();
// Adding Income Series to the dataset
dataset.addSeries(fromTemp);
// Creating XYSeriesRenderer to customize incomeSeries
from_tempRenderer = new XYSeriesRenderer();
from_tempRenderer.setColor(Color.WHITE);
from_tempRenderer.setPointStyle(PointStyle.CIRCLE);
from_tempRenderer.setFillPoints(true);
from_tempRenderer.setLineWidth(2);
from_tempRenderer.setChartValuesTextSize(20);
from_tempRenderer.setDisplayChartValues(true);
// Creating XYSeriesRenderer to customize expenseSeries
// Creating a XYMultipleSeriesRenderer to customize the whole chart
multiRenderer = new XYMultipleSeriesRenderer();
multiRenderer.setMargins(new int[] { 50, 50, 50, 50 });
multiRenderer.setYLabelsAlign(Align.RIGHT);
multiRenderer.setAxisTitleTextSize(20);
multiRenderer.setChartTitleTextSize(20);
multiRenderer.setLabelsTextSize(18);
multiRenderer.setLegendTextSize(18);
multiRenderer.setXLabels(0);
for (int k = 0; k < temp_date.size(); k++) {
multiRenderer.setChartTitle(temp_date.get(k));
System.out
.println("Temperature Date in Charts " + temp_date.get(k));
}
multiRenderer.setXTitle("Time");
multiRenderer.setYTitle("Temperature");
multiRenderer.setYLabelsPadding(5);
multiRenderer.setZoomButtonsVisible(true);
multiRenderer.setPointSize(5);
for (int i = 0; i < temp_time.size(); i++) {
multiRenderer.addXTextLabel(i, temp_time.get(i));
}
System.out.println("value of temp_details " + temp_details.size());
multiRenderer.removeSeriesRenderer(from_tempRenderer);
multiRenderer.addSeriesRenderer(from_tempRenderer);
}
Below is my AsyncTask
private class TemperatureDetails extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity_New.this);
pDialog.setMessage("Please Wait...");
pDialog.setCancelable(false);
pDialog.setIndeterminate(false);
pDialog.setCanceledOnTouchOutside(false);
pDialog.show();
// building_segment_id="";
/*
* temp_details.clear(); date_time.clear(); temp_date.clear();
* temp_time.clear();
*/
}
@Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
try {
System.out
.println("Temp Building Seg ID" + building_segment_id);
// String temperature_url =
// "http://www.intelatrek.com:98/Service1.svc/TempratueList?BeconID=329%20King&Date=2015-04-09";
String temp_url = "http://db.stat-systems.co.nz:81/Service1.svc/TempratureList?BeconID="
+ building_segment_id + "&Date=2015-04-13";
System.out.println("BlucatID in Asynctask " + blucat_id);
System.out.println("building_segment_id in AsyncTask "
+ building_segment_id);
temp_details.clear();
date_time.clear();
temp_date.clear();
temp_time.clear();
JSONObject jObject = JSONParser.getJsonFromURL(temp_url);
tempjsonflag = jObject.getString("Flag");
JSONArray jArray = jObject.getJSONArray("TempTransList");
for (int i = 0; i < jArray.length(); i++) {
JSONObject job = jArray.getJSONObject(i);
String BuildingId = job.getString("BuildingId");
String BuildingSegmentId = job
.getString("BuildingSegmentId");
// String Customer_ID = job.getString("Customer_ID");
String DateTime = job.getString("DateTime");
// String InnerLocationId =
// job.getString("InnerLocationId");
String Temp_Date = job.getString("TempDate");
String Temp_Time = job.getString("TempTime");
String Temperature = job.getString("Temperature");
temp_details.add(Temperature);
date_time.add(DateTime);
temp_date.add(Temp_Date);
temp_time.add(Temp_Time);
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
if (pDialog != null) {
pDialog.dismiss();
}
for (int i = 0; i < temp_details.size(); i++) {
System.out
.println("Temperature Details " + temp_details.get(i));
System.out.println("Temperature Date Time " + date_time.get(i));
System.out.println("Temperature Temp Date " + temp_date.get(i));
System.out.println("Temperature Temp Time " + temp_time.get(i));
}
System.out.println("Temp Details " + temp_details.size());
System.out.println("Temp Date Time " + date_time.size());
System.out.println("Temp Temp Date " + temp_date.size());
System.out.println("Temp Temp Time " + temp_time.size());
System.out.println("Temp JSON FLAG " + tempjsonflag);
// if(tempjsonflag.equals("Success")){
if (tempe_detail.toString().equals("")) {
temp_textview_temperature.setVisibility(View.GONE);
temp_textview_notfound.setVisibility(View.VISIBLE);
imageview_degree.setVisibility(View.GONE);
/*
* LinearLayout layout = (LinearLayout)
* findViewById(R.id.chart);
*/
chart.setVisibility(View.GONE);
} else {
temp_textview_notfound.setVisibility(View.GONE);
temp_textview_temperature.setVisibility(View.VISIBLE);
temp_textview_temperature.setText(tempe_detail);
temp_textview_temperature.setTextSize(70);
imageview_degree.setVisibility(View.VISIBLE);
// temp_textview_temperature.setLayoutParams(llp);
/*
* LinearLayout layout = (LinearLayout)
* findViewById(R.id.chart);
*/
chart.setVisibility(View.VISIBLE);
charDeclaration();
}
if (temp_textview_temperature.getText().toString().equals("1")) {
temp_textview_temperature.setPadding(25, 0, 0, 0);
} else if (temp_textview_temperature.getText().toString()
.equals("2")) {
temp_textview_temperature.setPadding(25, 0, 0, 0);
} else if (temp_textview_temperature.getText().toString()
.equals("3")) {
temp_textview_temperature.setPadding(25, 0, 0, 0);
} else if (temp_textview_temperature.getText().toString()
.equals("4")) {
temp_textview_temperature.setPadding(25, 0, 0, 0);
} else if (temp_textview_temperature.getText().toString()
.equals("5")) {
temp_textview_temperature.setPadding(25, 0, 0, 0);
} else if (temp_textview_temperature.getText().toString()
.equals("6")) {
temp_textview_temperature.setPadding(25, 0, 0, 0);
} else if (temp_textview_temperature.getText().toString()
.equals("7")) {
temp_textview_temperature.setPadding(25, 0, 0, 0);
} else if (temp_textview_temperature.getText().toString()
.equals("8")) {
temp_textview_temperature.setPadding(25, 0, 0, 0);
} else if (temp_textview_temperature.getText().toString()
.equals("9")) {
temp_textview_temperature.setPadding(25, 0, 0, 0);
} else {
temp_textview_temperature.setPadding(0, 0, 0, 0);
}
int dip = (int) TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_DIP, (float) 1, getResources()
.getDisplayMetrics());
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
int widthPixels = dm.widthPixels;
int heightPixels = dm.widthPixels;
float scaleFactor = dm.density;
float widthInches = widthPixels / scaleFactor;
if (widthInches >= 720) {
// 10" tablet resolutions
if (tempe_detail.toString().equals("")) {
temp_textview_temperature.setVisibility(View.GONE);
temp_textview_notfound.setVisibility(View.VISIBLE);
imageview_degree.setVisibility(View.GONE);
// temp_textview_notfound.setText(60);
chart.setVisibility(View.GONE);
} else {
temp_textview_notfound.setVisibility(View.GONE);
temp_textview_temperature.setVisibility(View.VISIBLE);
temp_textview_temperature.setText(tempe_detail);
if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
// Do some stuff
temp_textview_temperature.setTextSize(70);
imageview_degree.getLayoutParams().height = 30;
imageview_degree.getLayoutParams().width = 30;
} else {
temp_textview_temperature.setTextSize(180);
imageview_degree.getLayoutParams().height = 50;
imageview_degree.getLayoutParams().width = 50;
}
imageview_degree.setVisibility(View.VISIBLE);
// temp_textview_temperature.setLayoutParams(llp);
chart.setVisibility(View.VISIBLE);
charDeclaration();
}
if (temp_textview_temperature.getText().toString()
.matches("[0-9.]*")) {
temp_textview_temperature.setPadding(0, 0, 0, 0);
} else if (temp_textview_temperature.getText().length() == 3) {
temp_textview_temperature.setPadding(20, 0, 0, 0);
} else {
temp_textview_temperature.setPadding(0, 0, 0, 0);
}
} else if (widthInches >= 600) {
// 7" tablet resolutions
if (tempe_detail.toString().equals("")) {
temp_textview_temperature.setVisibility(View.GONE);
temp_textview_notfound.setVisibility(View.VISIBLE);
imageview_degree.setVisibility(View.GONE);
chart.setVisibility(View.GONE);
} else {
temp_textview_notfound.setVisibility(View.GONE);
temp_textview_temperature.setVisibility(View.VISIBLE);
temp_textview_temperature.setText(tempe_detail);
temp_textview_temperature.setTextSize(140);
imageview_degree.setVisibility(View.VISIBLE);
// temp_textview_temperature.setLayoutParams(llp);
chart.setVisibility(View.VISIBLE);
charDeclaration();
}
if (temp_textview_temperature.getText().toString()
.matches("[0-9.]*")) {
temp_textview_temperature.setPadding(25, 0, 0, 0);
if (temp_textview_temperature.getText().length() == 3) {
temp_textview_temperature.setPadding(0, 0, 0, 0);
}
}
else {
temp_textview_temperature.setPadding(0, 0, 0, 0);
}
}
// }
}
}
在日期更改后使用 myChart.repaint(); 重绘图表，如果重绘不起作用，那么在重绘图表之前尝试使用 removeAllViews() 到图表的父布局。
chartlayout.removeAllViews();