Java tutorial
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In no event and under no legal theory, * whether in tort (including negligence), contract, or otherwise, * unless required by applicable law (such as deliberate and grossly * negligent acts) or agreed to in writing, shall any Contributor be * liable to You for damages, including any direct, indirect, special, * incidental, or consequential damages of any character arising as a * result of this License or out of the use or inability to use the * Work (including but not limited to damages for loss of goodwill, * work stoppage, computer failure or malfunction, or any and all * other commercial damages or losses), even if such Contributor * has been advised of the possibility of such damages. * * 9. Accepting Warranty or Additional Liability. While redistributing * the Work or Derivative Works thereof, You may choose to offer, * and charge a fee for, acceptance of support, warranty, indemnity, * or other liability obligations and/or rights consistent with this * License. However, in accepting such obligations, You may act only * on Your own behalf and on Your sole responsibility, not on behalf * of any other Contributor, and only if You agree to indemnify, * defend, and hold each Contributor harmless for any liability * incurred by, or claims asserted against, such Contributor by reason * of your accepting any such warranty or additional liability. * * END OF TERMS AND CONDITIONS * * * Copyright (c) Bug 2016. * * */ package cn.scujcc.bug.bitcoinplatformandroid.fragment; import android.content.Intent; import android.graphics.Color; import android.graphics.Paint; import android.os.AsyncTask; import android.os.Bundle; import android.support.annotation.Nullable; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import com.github.mikephil.charting.charts.CandleStickChart; import com.github.mikephil.charting.components.XAxis; import com.github.mikephil.charting.components.YAxis; import com.github.mikephil.charting.data.CandleData; import com.github.mikephil.charting.data.CandleDataSet; import com.github.mikephil.charting.data.CandleEntry; import org.json.JSONArray; import java.util.ArrayList; import java.util.Calendar; import java.util.Date; import java.util.List; import cn.scujcc.bug.bitcoinplatformandroid.R; import cn.scujcc.bug.bitcoinplatformandroid.activity.ActualTransactionCandlestickChartsActivity; import cn.scujcc.bug.bitcoinplatformandroid.model.KLine; import cn.scujcc.bug.bitcoinplatformandroid.model.RequestParameter; import cn.scujcc.bug.bitcoinplatformandroid.util.NetWork; import cn.scujcc.bug.bitcoinplatformandroid.util.SecurityConfig; /** * Created by lilujia on 16/3/27. * <p/> * K */ public class CandlestickChartsFragment extends BaseFragment { private static final String TAG = "ATKLineChartsFragment"; private static final String KLINE_INFO_URL = "http://115.28.242.27:8080/at/kline"; public static final String ARGS_IS_FULL = "ARGS_IS_FULL"; private CandleStickChart mChart; private ArrayList<CandleEntry> mYVals; private ArrayList<String> mXVals; private boolean isFull; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); savedInstanceState = getArguments(); if (savedInstanceState != null) { isFull = savedInstanceState.getBoolean(ARGS_IS_FULL); } } @Nullable @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_actualtransactioncandlestickcharts, container, false); mChart = (CandleStickChart) view.findViewById(R.id.chart1); mChart.setBackgroundColor(Color.WHITE); mChart.setDescription(""); // if more than 60 entries are displayed in the chart, no values will be // drawn mChart.setMaxVisibleValueCount(60); // scaling can now only be done on x- and y-axis separately mChart.setPinchZoom(false); mChart.setDrawGridBackground(false); XAxis xAxis = mChart.getXAxis(); xAxis.setPosition(XAxis.XAxisPosition.BOTTOM); xAxis.setSpaceBetweenLabels(2); xAxis.setDrawGridLines(false); YAxis leftAxis = mChart.getAxisLeft(); // leftAxis.setEnabled(false); leftAxis.setLabelCount(7, false); leftAxis.setDrawGridLines(false); leftAxis.setDrawAxisLine(false); YAxis rightAxis = mChart.getAxisRight(); rightAxis.setEnabled(false); // rightAxis.setStartAtZero(false); mChart.getLegend().setEnabled(false); mChart.setNoDataText("?"); if (!isFull) { mChart.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(); intent.setClass(getActivity(), ActualTransactionCandlestickChartsActivity.class); getActivity().startActivity(intent); } }); } loadInitData(); return view; } /** * ?? */ public void loadInitData() { KLineDataInitAsyncTask initAsyncTask = new KLineDataInitAsyncTask(); initAsyncTask.execute(); } public void updateKines(List<KLine> list) { if (list == null) { return; } mChart.resetTracking(); ArrayList<CandleEntry> yVals1 = new ArrayList<CandleEntry>(); ArrayList<String> xVals = new ArrayList<String>(); for (int i = 0; i < list.size(); i++) { // float mult = 400; KLine kLine = list.get(i); float val = (float) kLine.getVal(); float high = (float) kLine.getHigh(); float low = (float) kLine.getLow(); float open = (float) kLine.getOpen(); float close = (float) kLine.getClose(); yVals1.add(new CandleEntry(i, high, low, open, close)); xVals.add(kLine.getTime()); } CandleDataSet set1 = new CandleDataSet(yVals1, "Data Set"); set1.setAxisDependency(YAxis.AxisDependency.LEFT); // set1.setColor(Color.rgb(80, 80, 80)); set1.setShadowColor(Color.DKGRAY); set1.setShadowWidth(0.7f); set1.setDecreasingColor(Color.RED); set1.setDecreasingPaintStyle(Paint.Style.FILL); set1.setIncreasingColor(Color.rgb(122, 242, 84)); set1.setIncreasingPaintStyle(Paint.Style.STROKE); set1.setNeutralColor(Color.BLUE); //set1.setHighlightLineWidth(1f); CandleData data = new CandleData(xVals, set1); mChart.setData(data); mChart.invalidate(); } class KLineDataInitAsyncTask extends AsyncTask<Void, Void, List<KLine>> { @Override protected List<KLine> doInBackground(Void... params) { try { RequestParameter parameter1 = new RequestParameter("api_key", SecurityConfig.USD_ACCESS_KEY); RequestParameter parameter2 = new RequestParameter("secret_key", SecurityConfig.USD_SECRET_KEY); RequestParameter parameter3; RequestParameter parameter4; if (!isFull) { parameter3 = new RequestParameter("size", "" + 30); Date date = new Date(); Calendar cal = Calendar.getInstance(); cal.setTime(date);//date ???Date cal.add(Calendar.MINUTE, -15);// before 8 hour long time = cal.getTimeInMillis(); parameter4 = new RequestParameter("since", "" + time); Log.e(TAG, "time" + time); } else { parameter3 = new RequestParameter("size", "" + 30); Date date = new Date(); Calendar cal = Calendar.getInstance(); cal.setTime(date);//date ???Date cal.add(Calendar.MINUTE, -30);// before 8 hour long time = cal.getTimeInMillis(); parameter4 = new RequestParameter("since", "" + time); Log.e(TAG, "time" + time); } String json = NetWork.requestGetUrl(KLINE_INFO_URL, parameter1, parameter2, parameter3, parameter4); Log.e(TAG, "JSON " + json); List<KLine> list = new ArrayList<>(); JSONArray arr = new JSONArray(json); for (int i = 0; i < arr.length(); i++) { JSONArray obj = arr.getJSONArray(i); KLine kline = new KLine(); kline.setDate(obj.getLong(0)); kline.setOpen(obj.getDouble(1)); kline.setHigh(obj.getDouble(2)); kline.setLow(obj.getDouble(3)); kline.setClose(obj.getDouble(4)); kline.setVal(obj.getDouble(5)); list.add(kline); } Log.e(TAG, "Size " + list.size()); return list; } catch (Exception e) { e.printStackTrace(); Log.e(TAG, "Exception " + e.getLocalizedMessage()); sendServerError(); return null; } } @Override protected void onPostExecute(List<KLine> list) { super.onPostExecute(list); updateKines(list); } } }