Has anyone met this situation when creating a bar-chart in android
I am trying to create a bar-chart in android using Achartengine.But i am actually getting the input values ie. x and y axis values (for creating a bar-chart) from the web service by consuming it.
My logcat is showing like this. What does this meant?
LOGCAT
11-10 14:45:37.483: W/KeyCharacterMap(421): No keyboard for id 0
11-10 14:45:37.483: W/KeyCharacterMap(421): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
11-10 14:45:44.044: D/AndroidRuntime(421): Shutting down VM
11-10 14:45:44.044: W/dalvikvm(421): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
11-10 14:45:44.054: E/AndroidRuntime(421): FATAL EXCEPTION: main
11-10 14:45:44.054: E/AndroidRuntime(421): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.xmlparsing_test/com.example.xmlparsing_test.BarGraphActivity}: java.lang.NullPointerException
11-10 14:45:44.054: E/AndroidRuntime(421): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
11-10 14:45:44.054: E/AndroidRuntime(421): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
11-10 14:45:44.054: E/AndroidRuntime(421): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
11-10 14:45:44.054: E/AndroidRuntime(421): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
11-10 14:45:44.054: E/AndroidRuntime(421): at android.os.Handler.dispatchMessage(Handler.java:99)
11-10 14:45:44.054: E/AndroidRuntime(421): at android.os.Looper.loop(Looper.java:123)
11-10 14:45:44.054: E/AndroidRuntime(421): at android.app.ActivityThread.main(ActivityThread.java:4627)
11-10 14:45:44.054: E/AndroidRuntime(421): at java.lang.reflect.Method.invokeNative(Native Method)
11-10 14:45:44.054: E/AndroidRuntime(421): at java.lang.reflect.Method.invoke(Method.java:521)
11-10 14:45:44.054: E/AndroidRuntime(421): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
11-10 14:45:44.054: E/AndroidRuntime(421): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
11-10 14:45:44.054: E/AndroidRuntime(421): at dalvik.system.NativeStart.main(Native Method)
11-10 14:45:44.054: E/AndroidRuntime(421): Caused by: java.lang.NullPointerException
11-10 14:45:44.054: E/AndroidRuntime(421): at com.example.xmlparsing_test.BarGraphActivity.buildBarDataset(BarGraphActivity.java:133)
11-10 14:45:44.054: E/AndroidRuntime(421): at com.example.xmlparsing_test.BarGraphActivity.DrawGraph(BarGraphActivity.java:77)
11-10 14:45:44.054: E/AndroidRuntime(421): at com.example.xmlparsing_test.BarGraphActivity.onCreate(BarGraphActivity.java:46)
11-10 14:45:44.054: E/AndroidRuntime(421): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
11-10 14:45:44.054: E/AndroidRuntime(421): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
11-10 14:45:44.054: E/AndroidRuntime(421): ... 11 more
11-10 14:45:45.794: I/Process(421): Sending signal. PID: 421 SIG: 9
BarGraphActivity.java
public class BarGraphActivity extends Chart
{
int[] order,freight,margin;
int[] x_axis = order;
int[] y_axis = freight;
int[] mpercent = margin;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main1);
Bundle extras = getIntent().getExtras();
if(extras != null)
{
order = extras.getIntArray("gotonextpage");
freight = extras.getIntArray("gotonextpage");
margin = extras.getIntArray("gotonextpage");
} else {}
/*x_axis = new int[1];
y_axis = new int[1];
x_axis[0] = getIntent().getIntExtra("orderNo", 90);
y_axis[0] = getIntent().getIntExtra("freightRate", 80);*/
DrawGraph();
}
public void DrawGraph()
{
String[] titles = new String[] { " Barcharts", "" };
List<int[]> values = new ArrayList<int[]>();
values.add(order);
values.add(freight);
values.add(margin);
int[] colors = new int[] { Color.WHITE, Color.BLACK };
XYMultipleSeriesRenderer renderer = buildBarRenderer(colors);
renderer.setOrientation(Orientation.HORIZONTAL);
setChartSettings(renderer, "some texts", " ", " ", 0, order, 0, freight, Color.RED, Color.LTGRAY);
renderer.setXLabels(1);
renderer.addXTextLabel(2, "orderNo");
renderer.addYTextLabel(2, "freight");
renderer.setPanEnabled(true, false);
int length = renderer.getSeriesRendererCount();
for (int i = 0; i < length; i++)
{
SimpleSeriesRenderer seriesRenderer = renderer.getSeriesRendererAt(i);
seriesRenderer.setDisplayChartValues(true);
}
ChartFactory.getBarChartIntent(this, buildBarDataset(titles, values), renderer, Type.DEFAULT);
}
public XYMultipleSeriesRenderer buildBarRenderer(int[] colors)
{
// creates a SeriesRenderer and initializes it with useful default values as well as colors
XYMultipleSeriesRenderer renderer = new XYMultipleSeriesRenderer();
renderer.setAxisTitleTextSize(15);
renderer.setChartTitleTextSize(20);
renderer.setLabelsTextSize(15);
renderer.setLegendTextSize(15);
int length = colors.length;
for (int i = 0; i < length; i++)
{
SimpleSeriesRenderer r = new SimpleSeriesRenderer();
r.setColor(colors[i]);
renderer.addSeriesRenderer(r);
}
return renderer;
}
public void setChartSettings(XYMultipleSeriesRenderer renderer, String title, String xTitle, String yTitle,
int xMin, int[] order2, int yMin, int[] freight2, int axesColor, int labelsColor)
{
// sets lots of default values for this renderer
renderer.setChartTitle(title);
renderer.setXTitle(xTitle);
renderer.setYTitle(yTitle);
renderer.setXAxisMin(xMin);
renderer.setYAxisMin(yMin);
renderer.setAxesColor(axesColor);
renderer.setLabelsColor(labelsColor);
renderer.setApplyBackgroundColor(true);
renderer.setBackgroundColor(Color.BLACK);
}
public XYMultipleSeriesDataset buildBarDataset(String[] titles, List<int[]> values)
{
// adds the axis titles and values into the dataset
XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
int length = titles.length;
for (int i = 0; i < length; i++)
{
CategorySeries series = new CategorySeries(titles[i]);
int[] v = values.get(i);
int seriesLength = v.length;
for (int k = 0; k < seriesLength; k++)
{
series.add(v[k]);
}
dataset.addSeries(series.toXYSeries());
}
return dataset;
}
}
Chart.java
public class Chart extends Activity
{
EditText edt1, edt2;
TextView txtv1;
Button btn;
String orderNo = "";
int freightRate = 0;
int marginPercent = 0;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
edt1 = (EditText) findViewById(R.id.editText1);
edt2 = (EditText) findViewById(R.id.editText2);
btn = (Button) findViewById(R.id.button1);
btn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
getTMSChart(edt1.getText().toString(), edt2.getText().toString());
Intent intnt = new Intent(v.getContext(), BarGraphActivity.class);
intnt.putExtra("orderNo", orderNo);
intnt.putExtra("freightRate", freightRate);
intnt.putExtra("marginPercent", marginPercent);
startActivity(intnt);
}
});
}
public void getTMSChart(String FromDate, String ToDate)
{
System.setProperty("http.keepAlive", "false");
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.dotNet = true;
String METHOD = "GetTMSChart";
String NAMESPACE = "http://tempuri.org/";
String SOAP_ACTION = "http://tempuri.org/GetTMSChart";
String URL = "http://54.251.60.177/TMSOrdersService/TMSDetails.asmx";
SoapObject request = new SoapObject(NAMESPACE, METHOD);
request.addProperty("FromDate", FromDate.trim());
request.addProperty("ToDate", ToDate.trim());
envelope.setOutputSoapObject(request);
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
try {
androidHttpTransport.call(SOAP_ACTION, envelope);
SoapObject result = (SoapObject) envelope.bodyIn;
SoapObject root = (SoapObject) ((SoapObject) (result).getProperty(0)).getProperty("NewDataSet");
int tablesCount = root.getPropertyCount();
for (int i = 0; i < tablesCount; i++)
{
SoapObject table = (SoapObject) root.getProperty(i);
orderNo = table.getPropertyAsString("Order_No").replace("OR", "");
freightRate = Integer.parseInt(table.getPropertyAsString("Freight_Rate"));
marginPercent = Integer.parseInt(table.getPropertyAsString("Margin_Percent"));
// Toast.makeText(getApplicationContext(), "", Toast.LENGTH_LONG).show();
for(int j = 0; j < tablesCount; j++)
{
int ord,fre,marg;
Bundle extras = getIntent().getExtras();
if(extras!=null )
{
ord = extras.getInt("gotonextpage");
fre = extras.getInt("gotonextpage");
marg = extras.getInt("gotonextpage");
}
else{}
}
}
}
catch (Exception e)
{
Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
e.printStackTrace();
}
}}
You are not reading Extra of intent properly. This is just one problem. There are many other things wrong too.
You put extras to intent with this code :
And you get them with :
The keys and types are all wrong.
You are passing extra data to intent via these variables:
To store it in target activity you use
Why?