import com.jjoe64.graphview.Viewport; //导入依赖的package包/类
void setViewPortY(@NonNull GraphView graphView) {
    Viewport viewport = graphView.getViewport();
    viewport.setScrollable(true);
    viewport.setYAxisBoundsManual(true);
    viewport.setMinY(GraphConstants.MIN_Y);
    viewport.setMaxY(getMaximumY());
    viewport.setXAxisBoundsManual(true);
}
 

import com.jjoe64.graphview.Viewport; //导入依赖的package包/类
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    this.requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.wifi_details);


    HashMap<String, String> WifiInfoIntent;

    UseWifiDetector = false;
    StartWifiInfo = (HashMap<String, String>)(getIntent().getSerializableExtra("WifiInfo"));
    NetworkBSSID = StartWifiInfo.get("BSSID");

    txtBSSID = (TextView)this.findViewById(R.id.txtDetailsBSSID);
    txtESSID = (TextView)this.findViewById(R.id.txtDetailsESSID);
    txtFreq = (TextView)this.findViewById(R.id.txtDetailsFreq);
    txtSignal = (TextView)this.findViewById(R.id.txtDetailsSignal);
    txtChannel = (TextView)this.findViewById(R.id.txtDetailsChannel);
    chkbUseDetector = (CheckBox)this.findViewById(R.id.chkbUseDetector);
    llGrphView = (LinearLayout)this.findViewById(R.id.llGrphView);

    mSoundPool = new SoundPool(1, AudioManager.STREAM_MUSIC, 0);

    // Graph init
    iGraphPointCount = 0;
    graphSeries = new LineGraphSeries<>();
    graphView = new GraphView(this);
    graphView.getGridLabelRenderer().setNumVerticalLabels(2);
    graphView.getGridLabelRenderer().setHorizontalLabelsVisible(false);
    graphView.getViewport().setMinY(0);
    graphView.getViewport().setMaxY(100);
    graphView.getViewport().setYAxisBoundsStatus(Viewport.AxisBoundsStatus.FIX);
    graphView.getViewport().setYAxisBoundsManual(true);

    graphView.setTitle("Signal graph");
    graphView.addSeries(graphSeries);
    llGrphView.addView(graphView);

    chkbUseDetector.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            UseWifiDetector = isChecked;

            if (UseWifiDetector) {
                DetectorThread = new Thread(new Runnable() {
                    @Override
                    public void run() {
                        DetectorWorker();
                    }
                });
                DetectorThread.start();
            }
        }
    });

    setBSSID(StartWifiInfo.get("BSSID"));
    setESSID(StartWifiInfo.get("SSID"));
    setFreq(StartWifiInfo.get("Freq"));
    setSignal(StartWifiInfo.get("Signal"));

    WifiMgr = (WifiManager) getSystemService(Context.WIFI_SERVICE);

    ScanThread = new Thread(new Runnable() {
        @Override
        public void run() {
            ScanWorker();
        }
    });
    ScanThreadActive = true;
    ScanThread.start();
}
 

import com.jjoe64.graphview.Viewport; //导入依赖的package包/类
private void setupGraph(
        Map<String, List<StatsService.DataPoint>> dataPointsByCollectionId,
        GraphView graph,
        boolean yFromZero,
        final Formatter yAxisFormatter) {

    double minX = System.currentTimeMillis() - TimeUnit.DAYS.toMillis(daysAgo) - TimeUnit.HOURS.toMillis(12);
    double maxX = System.currentTimeMillis() + TimeUnit.HOURS.toMillis(12);
    double minY = 0;
    double maxY = 0;

    int colorNo = 0;
    for (String collectionId : dataPointsByCollectionId.keySet()) {
        List<StatsService.DataPoint> points = dataPointsByCollectionId.get(collectionId);

        BarGraphSeries series = new BarGraphSeries<>(points.toArray(new DataPointInterface[points.size()]));
        series.setColor(ContextCompat.getColor(this, graphColors[(colorNo ++) % graphColors.length]));
        series.setTitle(collectionId);

        graph.addSeries(series);

        if (minY == 0) {
            minY = series.getLowestValueY();
        }
        if (maxY == 0) {
            maxY = series.getHighestValueY();
        }

        maxY = Math.max(maxY, series.getHighestValueY());
        minY = Math.min(minY, series.getLowestValueY());
    }

    if (yFromZero) {
        minY = 0;
    }

    if (minY == maxY) {
        minY = 0;
        maxY = 1 + maxY * 1.5;
    }

    graph.getViewport().setMinX(minX);
    graph.getViewport().setMaxX(maxX);
    graph.getViewport().setXAxisBoundsManual(true);

    graph.getViewport().setMinY(minY);
    graph.getViewport().setMaxY(maxY);
    graph.getViewport().setYAxisBoundsManual(true);

    graph.getLegendRenderer().setFixedPosition(0, 0);
    graph.getLegendRenderer().setVisible(true);

    graph.getGridLabelRenderer().setLabelFormatter(new LabelFormatter() {
        public String lattestFormatted;
        Calendar cal = Calendar.getInstance();
        @Override
        public String formatLabel(double value, boolean isValueX) {
            if (isValueX) {
                cal.setTimeInMillis((long) value);
                String formatted = String.valueOf(cal.get(Calendar.DAY_OF_MONTH));
                if (formatted.equals(lattestFormatted)) {
                    this.lattestFormatted = formatted;
                    return "";
                }
                this.lattestFormatted = formatted;
                return formatted;
            }
            return yAxisFormatter.format(value);
        }

        @Override
        public void setViewport(Viewport viewport) {}
    });
    graph.getGridLabelRenderer().setGridColor(Color.GRAY);
    graph.getGridLabelRenderer().setNumHorizontalLabels(daysAgo);
}
 

import com.jjoe64.graphview.Viewport; //导入依赖的package包/类
/**
 * @param viewport the used viewport
 */
@Override
public void setViewport(Viewport viewport) {
    mViewport = viewport;
    adjust();
}
 

import com.jjoe64.graphview.Viewport; //导入依赖的package包/类
@Override
public void setViewport(Viewport viewport) {
    // ignore
}
 

import com.jjoe64.graphview.Viewport; //导入依赖的package包/类
public void setViewport() {
    Viewport viewport = graphView.getViewport();
    viewport.setMinX(0);
    viewport.setMaxX(getViewportCntX());
}
 

import com.jjoe64.graphview.Viewport; //导入依赖的package包/类
@Override
public void setViewport(Viewport viewport) {
    // Do nothing
}