Androidplot - creating chart without XML -

i need create piecharts on activity, , quantity of charts varies. try create piechart dynamically code, , it's doesn't work. layout correct - button added successfully. can me? code: layout:

<scrollview xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" tools:context="example.bros.nik.tabs1.mealsactivity" android:layout_width="wrap_content" android:layout_height="wrap_content"> <linearlayout     xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"     android:id="@+id/l_layout"     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:paddingleft="@dimen/activity_horizontal_margin"     android:paddingright="@dimen/activity_horizontal_margin"     android:paddingtop="@dimen/activity_vertical_margin"     android:paddingbottom="@dimen/activity_vertical_margin"     android:orientation="vertical" > </linearlayout> </scrollview> 

java:

@override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_meals);     linearlayout l_layout = (linearlayout) findviewbyid(r.id.l_layout);     meals_params = resultsactivity.get_meals_params();              linearlayout.layoutparams lp_view = new linearlayout.layoutparams(linearlayout.layoutparams.wrap_content,             linearlayout.layoutparams.wrap_content, 1.0f);      piechart pie = new piechart(this, "chart#1");      segment s1 = new segment("Углеводы", meals_params[0].get_carbohydrates_percent());     segment s2 = new segment("Жиры", meals_params[0].get_fats_percent());     segment s3 = new segment("Белки", meals_params[0].get_proteins_percent());      embossmaskfilter emf = new embossmaskfilter(new float[]{1, 1, 1}, 0.4f, 10, 8.2f);      segmentformatter sf1 = new segmentformatter();     sf1.configure(getapplicationcontext(), r.xml.pie_segment_formatter1);     sf1.getfillpaint().setmaskfilter(emf);      segmentformatter sf2 = new segmentformatter();     sf2.configure(getapplicationcontext(), r.xml.pie_segment_formatter2);     sf2.getfillpaint().setmaskfilter(emf);      segmentformatter sf3 = new segmentformatter();     sf3.configure(getapplicationcontext(), r.xml.pie_segment_formatter3);     sf3.getfillpaint().setmaskfilter(emf);      pie.addseries(s1, sf1);     pie.addseries(s2, sf2);     pie.addseries(s3, sf3);       pie.getrenderer(pierenderer.class).setdonutsize(0.1f,pierenderer.donutmode.percent);     pie.redraw();     pie.getborderpaint().setcolor(color.transparent);     pie.getbackgroundpaint().setcolor(color.transparent);      l_layout.addview(pie, lp_view); 

i try this:

pie.setlayoutparams(lp_view); l_layout.addview(pie); 

and it's doesn't me.

and if add button layout:

pie.setlayoutparams(lp_view); l_layout.addview(pie);  button = new button(this); but.settext("bla"); l_layout.addview(but, lp_view); 

then see button (look @ screenshot). added button

edit: in android docs written, in constructor

viewgroup.layoutparams (int width, int height) 

attributes may absolute sizes of view, or may constants - wrap_content (int value -2), match_parent (int value -1). probably, piechart doesn't recognize these constants, , absolute size negative values. found solution:

private int[] getdisplayparams() {     int[] display_params = new int[2];     display display = getwindowmanager().getdefaultdisplay();     if (build.version.sdk_int >= 13) {         point size = new point();         display.getsize(size);         display_params[0] = size.x;         display_params[1] = size.y;     }     else {         display_params[0] = display.getwidth();         display_params[1] = display.getheight();     }     return display_params; } 

and use size of screen determining size of chart:

int[] display_params = getdisplayparams(); double pie_size = display_params[0]*0.8; int pie_size_int = pie_size.intvalue(); viewgroup.layoutparams lp_view = new linearlayout.layoutparams(pie_size_int, pie_size_int); 

looks not providing layoutparams pie. try doing before adding pie l_layout:

pie.setlayoutparams(new linearlayout.layoutparams(     linearlayout.layoutparams.fill_parent,     linearlayout.layoutparams.fill_parent)); 

edit: went , noticed layout enclosed in scrollview scrollview set wrap content , content set match parent seems might chicken , egg problem as described here. believe buttons, etc. have default non-zero values these whereas plots not, might explain why button works.

as sanity check, happens if specify absolute size plot this:

linearlayout.layoutparams lp_view = new linearlayout.layoutparams(100, 100); 

you can try:

plot.setminimumheight(100); plot.setminimumwidth(100);