Why the android code below display nothing - 


    // customize linear layout            linearlayout mainlayout = new linearlayout(this);     linearlayout originwordslayout = new linearlayout(this);     linearlayout transwordslayout = new linearlayout(this);     mainlayout.setorientation(linearlayout.horizontal);       originwordslayout.setorientation(linearlayout.vertical);       transwordslayout.setorientation(linearlayout.vertical);      // set col 1     textview origintitle = new textview(this);     origintitle.setwidth(android.view.viewgroup.layoutparams.match_parent);     origintitle.setheight(android.view.viewgroup.layoutparams.match_parent);     origintitle.settext("col1");     originwordslayout.addview(origintitle);       // set col 2     textview transtitle = new textview(this);     transtitle.setwidth(android.view.viewgroup.layoutparams.match_parent);     transtitle.setheight(android.view.viewgroup.layoutparams.match_parent);     transtitle.settext("col2");     transwordslayout.addview(transtitle);        mainlayout.addview(originwordslayout);     mainlayout.addview(transwordslayout);     setcontentview(mainlayout);

and when run app, there's nothing on screen tell me what's wrong code? want dynamically add view layout

originwordslayout , transwordslayout should wrap_content , textview transtitle , textview origintitle instead of match_parent


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