I have an issue with an achartengine graph - as in this screenshot:
It looks like the X axis is given too much bottom padding, and the values are duplicated (one representation of each value is in the graph proper, and reacts properly to panning, while the other is located at the bottom of the graph view, but can't be manipulated in any way).
Here's the code used to create the graph:
protected void onCreate(Bundle savedInstanceState) {
...
gDataset = new XYMultipleSeriesDataset();
gRenderer = new XYMultipleSeriesRenderer();
gRenderer.setApplyBackgroundColor(true);
gRenderer.setPointSize(10);
chart = new TimeBarChart(gDataset, gRenderer);
graphView = new GraphicalView(this, chart);
graphHolder.addView(graphView);
//Mode is just an internal enum
chart.setDateFormat(curMode == Mode.DAY ? "HH:mm dd.MM.yyyy" : "dd.MM.yyyy");
....
}
And to populate it:
...
//some DB stuff goes here, result is the cursor
curSeries = new XYSeries("");
gDataset.addSeries(curSeries);
XYSeriesRenderer renderer = new XYSeriesRenderer();
renderer.setColor(Color.RED);
renderer.setPointStyle(PointStyle.POINT);
gRenderer.addSeriesRenderer(renderer);
while (!result.isAfterLast()) {
.....
curSeries.add(timestamp,value);
....
}
.....
graphView.invalidate();
graphView.repaint();
And here's the graph holder's view definition in the layout XML (main container is RelativeLayout of course) :
<LinearLayout
android:id="#+id/graphHolder"
android:layout_width="fill_parent"
android:layout_height="200dp"
android:layout_alignParentTop="true"
android:minHeight="200dp">
</LinearLayout>
A couple of things:
I'm using the 0.7 version.
The TimeBarChart class is nothing else than a TimeChart with the simple change to extend BarChart instead. The code is copied from the 0.7 revision. Regardless, I was using ChartFactory#getTimeChartView() previously and the result was the same - so this isn't the cause of the problem.
I've tried checking whether the height layout parameter causes the problem, but that wasn't it as well.
graphHolder is injected by RoboGuice.
the problem was encountered in the 2.3 emulator.
Obviously, I'm doing something wrong, but I'm at a loss what. Any help is greatly appreciated.
PS. I've tried to post it on the achartengine group, but it looks like the mods are hibernating for the winter ;).
I finally had time to reinvestigate this, and figured it out.
The gist:
The bars on the bottom are the legend. I had a bug in my code that caused it to create a series for each datapoint, hence the multiple "bars", in reality legend graphics. The series had no names, which added to the confusion.
Fixing the bug and adding setShowLegend(false) dealed with the issue.
I've discovered this while evaluating AndroidPlot (BTW, I recommend it as an alternative to achartengine, as graphs can be defined in XML, and can be way more liberally customized graphically than the screenshots suggest).
I somehow failed to notice the legend in the achartengine screenshots, but I recognized them in AndroidPlot. And yes, I do feel quite stupid now :).
Related
I have an android resume building application. I want to generate a PDF of size A4 from my view. Here's how my layout looks like - At the top I have a Top App Bar, and the whole view in encapsulated in drawer. The main part which contains user's details is encapsulated in nestedScrollView, which contains multiple LinearLayout and TextView. In this screenshot below, I have populated it with mock data, but in actuality, I am fetching data from the Firebase Realtime Database and displaying it on the UI.
I tried to understand iTextPdf solution and multiple question of similar type that has been asked here, but I couldn't find something solid. Please help me out, it would be of great help.
Also, please don't close this question by giving a reason that the question doesn't contain any code. It doesn't because I don't have any. I am trying to solve this problem from scratch. I have tried to describe my problem as much as I could.
try this:
create a WebView and copy the text of your edittext in it:
webview.loadData(youredittext.gettext().tostring, "text/html", "UTF-8");
and convert webview to pdf by below function:
private void createWebPrintJob(WebView webView) {
PrintManager printManager = (PrintManager) this
.getSystemService(Context.PRINT_SERVICE);
PrintDocumentAdapter printAdapter =
webView.createPrintDocumentAdapter();
String jobName = getString(R.string.app_name) + " Print Test";
if (printManager != null) {
printManager.print(jobName, printAdapter,
new PrintAttributes.Builder().build());
}
}
after that user can select page size for example A4
There are a lot of libraries that convert layouts to PDF, but let's opt for popular one so we could find answers if we're stuck.
The libraries I listed works like so : They take screenshot of your layout as bitmap image and convert it to pdf.
- 1st solution: iTextPDF https://github.com/itext/itext7 (New Version).
check this detailed tutorial which treates also the case of taking screenshot of a scrollview https://www.codeproject.com/Articles/989236/How-to-Convert-Android-View-to-PDF-2
and this stackoverflow answer https://stackoverflow.com/a/29731275/12802591
- 2nd solution: PdfMyXML library https://github.com/HendrixString/Android-PdfMyXml just follow the steps in the documentation.
They may be other solutions, but these are the popular ones.
Let Me know if it works for you and also if you're stuck. Thank you!
This has reference to JFreeChart rendering of candlestick charts. Below is the code fragment that generates a candle stick chart with JFreeChart.
This code has been tested and has been working for a long time. However, the version of JFreeChart was changed from 1.0.17 to 1.0.19 and the candlestick chart generated with 1.0.19 is showing smudging of the candle objects/lines. When I changed the library back to 1.0.17, the candlestick objects/lines once again becomes clear.
The images with both the libraries are provided below.
I have tried to find the cause of this and have been unsuccessful as yet. Now, the question is, since the code is tested and possibly does not have any error (at least what I can figure or am I missing something?), is the issue with the library? Have anyone faced this problem and has an work around
I shall be rather grateful, if someone has found the reason/solution to this and shared the same.
Please use MS Paint to view the images.
try{
chart=ChartFactory.createCandlestickChart("Candlestick Chart", "Date", "EOD Closing Price", (OHLCDataset)dataset, true);
plot=(XYPlot)chart.getPlot();
CandlestickRenderer renderer=new Chart_CandlestickRenderer();//(CandlestickRenderer)plot.getRenderer();
renderer.setSeriesPaint(0, Color.BLACK);
renderer.setUpPaint(Color.WHITE);
renderer.setDownPaint(Color.BLACK);
//HighLowItemLabelGenerator candleTooltipGenerator=new HighLowItemLabelGenerator(new SimpleDateFormat("dd-MMM-yyyy"), new DecimalFormat());
XYToolTipGenerator candleTooltipGenerator=Chart_TooltipProvider.getOHLCTooltipGenerator();
renderer.setBaseToolTipGenerator(candleTooltipGenerator);
plot.setRenderer(0,renderer);
//Organize the data to draw Fibbonacci retracements with highs and lows
DefaultOHLCDataset ohlcDataset=(DefaultOHLCDataset)dataset;
int dataCount=ohlcDataset.getItemCount(0);
data=new double[dataCount*2];//for each data item we shall get 2 values, high and low
for(int i=0;i<dataCount;i++){
//for each i 2 data values need to be put into the array and adjust the index accordingly
data[i*2]=ohlcDataset.getHighValue(0, i);
data[i*2+1]=ohlcDataset.getLowValue(0, i);
}//for closing
//If there is only the candlestick to be drawn, return, as the job has been done, draw the Fibonnaci and return
if(indicators.length==1){
this.drawFibonnaciRetracement(data, plot);
retVal=true;
return retVal;
}//if closing
}catch(Exception e){e.printStackTrace();return retVal;}
Try setting setAntiAlias of the JFreeChart to false.
JFreeChart chart = ChartFactory.createCandlestickChart(...);
chart.setAntiAlias(false);
I'm trying to use a Table to create a menu with lined-up Buttons and Labels. I'm using the latest nightly builds of libgdx, which changed the Table API (amongst other things).
Here's the code in my Screen constructor:
this.mStage = new Stage();
this.mTable = new Table();
this.mTable.setFillParent(true);
this.mTable.debugTable();
this.mStage.addActor(this.mTable);
// now I add some stuff to the table
// ...
My resize function looks like this:
this.mStage.setViewport(width, height, true);
this.mTable.setFillParent(true);
this.mTable.invalidate();
My render function has the following:
System.out.println("Table size is " +
this.mTable.getWidth() + " by " +
this.mTable.getHeight());
this.mStage.draw();
Table.drawDebug();
Although my console shows the correct size:
Table size is 480.0 by 640.0
the Table size is shrink-wrapped around its children, and does not extend to the correct size of 480x640.
Any ideas?
Answering my own question for the benefit of others. The way I was adding widgets to the table was incorrect:
this.mTable.row();
this.mTable.add(button).fillX();
I needed to call the fillX() method of the row():
this.mTable.row().fillX();
this.mTable.add(button);
Hope this helps someone.
To add to the above answers, it may be helpful to know that you can make these setting defaults for the table like so:
this.mTable.defaults().expandX().fillX();
The settings will apply uniformly to all rows and cells.
Your incorrect version of adding widget to the table can be easily
corrected by expanding a cell first using .expandX() method and then
by filling that cell with a widget by calling fillX().
so your initial code:
this.mTable.row();
this.mTable.add(button).fillX();
should be corrected to the following version:
this.mTable.row();
this.mTable.add(button).expandX().fillX();
these 2 lines can be shorten to one:
this.mTable.add(button).expandX().fillX().row();
I'm getting mixed results trying to render a basic alien that was done in Blender:
I export in to Ogre 3D and load it in Eclipse:
Then when I load it in my code and try to render it the material won't render:
Could you tell me what I must do to achieve the full alien in my scene? The code I use in Jmonkeyengine is
Spatial model3 = assetManager
.loadModel("objects/creatures/alien/alien.mesh.xml");
model3.scale(0.3f, 0.3f, 0.3f);
model3.setLocalTranslation(-40.0f, 3.5f, -20.0f);
rootNode.attachChild(model3);
Update
I've got material files like these from the export:
dev#dev-OptiPlex-745:~$ ls workspace/DungeonWorld2/assets/objects/creatures/alien/
alien.mesh Material.002.material Material.005.material
alien.mesh.xml Material.003.material
alien.skeleton.xml Material.004.material
dev#dev-OptiPlex-745:~$
This material code actually produces a material in the scene but it's not the one from blender:
model3.setMaterial( new Material(assetManager,
"Common/MatDefs/Misc/Unshaded.j3md") );
Result:
However, loading a 3D model of an alephant without defining the material does work:
Spatial elephant = (Spatial) assetManager.loadModel("Models/Elephant/Elephant.mesh.xml");
float scale = 0.05f;
elephant.scale(scale,scale,scale);
elephant.setLocalTranslation(-50.0f, 3.5f, -20.0f);
control = elephant.getControl(AnimControl.class);
control.addListener(this);
channel = control.createChannel();
for (String anim : control.getAnimationNames())
System.out.println("elephant can:"+anim);
The above code correctly renders the elephant so why can't I export a mesh like that for the alien? I tried to explcitly load the material but it's not working for me:
Spatial model3 = assetManager
.loadModel("objects/creatures/alien/alien.mesh.xml");
model3.scale(0.3f, 0.3f, 0.3f);
model3.setLocalTranslation(-40.0f, 3.5f, -20.0f);
model3.setMaterial( new Material(assetManager,
"objects/creatures/alien/alien.material") );
rootNode.attachChild(model3);
The above generates an exception and I don't really know what material file it is that I'm loading and what do to with the two or three other material files that the export generated:
java.lang.ClassCastException: com.jme3.material.MaterialList cannot be cast to com.jme3.material.MaterialDef
at com.jme3.material.Material.<init>(Material.java:116)
at adventure.Main.simpleInitApp(Main.java:309)
at com.jme3.app.SimpleApplication.initialize(SimpleApplication.java:225)
at com.jme3.system.lwjgl.LwjglAbstractDisplay.initInThread(LwjglAbstractDisplay.java:129)
at com.jme3.system.lwjgl.LwjglAbstractDisplay.run(LwjglAbstractDisplay.java:205)
at java.lang.Thread.run(Thread.java:679)
Update
Loading other models this way is working:
BlenderKey blenderKey = new BlenderKey(
"objects/creatures/troll/troll.mesh.xml");
Spatial troll = (Spatial) assetManager.loadModel(blenderKey);
troll.setLocalTranslation(new Vector3f(-145, 15, -10));
rootNode.attachChild(troll);
BlenderKey blenderKey2 = new BlenderKey(
"objects/creatures/spaceman/man.mesh.xml");
Spatial man = (Spatial) assetManager.loadModel(blenderKey2);
man.setLocalTranslation(new Vector3f(-140, 15, -10));
rootNode.attachChild(man);
I get the models inside my game and they look alreight, both the troll and the spaceman that both originally were .blend files.
Now it's much better when I did it over and it is loading the material. The only problem with the alien left now is the holes in the head that was also answered here.
BlenderKey blenderKey = new BlenderKey(
"objects/creatures/alien/alien.mesh.xml");
Spatial alien = (Spatial) assetManager.loadModel(blenderKey);
alien.setLocalTranslation(new Vector3f(-145, 15, -10));
rootNode.attachChild(alien);
You didn't write anything about your material - did you write one and used it correctly? The problem you get seems to be the lack of material to me.
In general you'll need some *.material file and probably some textures (if you used them in Blender). For the beginning you can use one of the materials that come with Ogre, you'll just need to add:
model3.setMaterialName( "Examples/Rockwall" );
Then look if it changes anything. If you still get the problem you can look into 'Ogre.log' file - it's always worth checking because all the errors goes there.
I also see the second problem here - you render the object as 'one sided' while blender probably render is as two-sided mesh, so you get the holes on the head. You can select in the material to be two sided, but it's better (and faster during rendering) to just create your models without the holes :).
I am trying to create a gradient fill for a series in an area chart that I am building through the BIRT chart API, but the book "Integrating and Extending BIRT" and the Interwebs seem curiously silent about how to get it to work. It seems no matter what I do, I always get a flat color from the default palette. I've tried using SeriesDefinition.getSeriesPalette().update(Gradient) and even creating my own Palette with the gradient fill in it and setting that on the SeriesDefinition, but to no avail. I've also noticed that if I do not perform a shift() on the Palette, even if it's shift(0), which the Javadocs claim will do nothing, I get NullPointerException when I try to generate the chart:
Caused by: java.lang.NullPointerException
at org.eclipse.birt.chart.render.Area.renderDataPoints(Area.java:521)
at org.eclipse.birt.chart.render.Line.renderSeries(Line.java:570)
at org.eclipse.birt.chart.render.AxesRenderer.renderPlot(AxesRenderer.java:2181)
at org.eclipse.birt.chart.render.AxesRenderer.render(AxesRenderer.java:314)
at org.eclipse.birt.chart.factory.Generator.render(Generator.java:1368)
... 108 more
Here's the latest (non-working) code that I've tried:
Gradient gradient = FillUtil.createDefaultGradient(BirtReportBuilder.COLOR_WHITE);
gradient.setStartColor(ColorDefinitionImpl.WHITE());
gradient.setEndColor(ColorDefinitionImpl.create(76, 116, 131));
gradient.setDirection(90);
SeriesDefinition sdY = SeriesDefinitionImpl.create();
sdY.getQuery().setDefinition("\"Quantity\"");
Palette pal = PaletteImpl.create(gradient);
pal.shift(0);
sdY.setSeriesPalette(pal);
sdY.getSeries().add(as1);
yAxisPrimary.getSeriesDefinitions().add(sdY);
So what's the magic incantation to get the BIRT charting API to use my Gradient as the area fill?
This code works for me, I get a ugly coloured serie...
sdY.getSeriesPalette().update(GradientImpl.create(ColorDefinitionImpl.create(255,255,255), ColorDefinitionImpl.create(200,0,0,150), 90, false));
Hope it will help you ;p