Android relativelayout Attribute Usage details

Relative to the given ID control

The code is as follows

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Android:layout_above Place the bottom of the control over the control with the given ID; Android:layout_below Place the bottom of the control under the control of the given ID; Android:layout_toleftof aligns the right edge of the control with the left edge of the control with the given ID; Android:layout_torightof aligns the left edge of the control with the right edge of the control with the given ID; Android:layout_alignbaseline aligns the baseline of the control with the baseline of the given ID; Android:layout_aligntop aligns the top edge of the control with the top edge of the given ID; Android:layout_alignbottom aligns the bottom edge of the control with the bottom edge of the given ID; Android:layout_alignleft aligns the left edge of the control with the left edge of the given ID; Android:layout_alignright aligns the right edge of the control with the right edge of the given ID; Relative to Parent component Android:layout_alignparenttop If true, aligns the top of the control with the top of its parent control; Android:layout_alignparentbottom If true, aligns the bottom of the control with the bottom of its parent control; Android:layout_alignparentleft If true, aligns the left part of the control with the left part of its parent control; Android:layout_alignparentright If true, aligns the right part of the control with the right part of its parent control; Center Android:layout_centerhorizontal If True, centers the control horizontally; Android:layout_centervertical If True, centers the control vertically; Android:layout_centerinparent If true, place the control in the center of the parent control; External interval The value of the offset on the android:layout_margintop; Android:layout_marginbottom the value of the offset; The value of the android:layout_marginleft left offset; Android:layout_marginright the value of the right offset;

Relativelayout Code

The code is as follows

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Relativelayout relativelayout = new Relativelayout (context); Spinner Spinner = new Spinner (context); Edit_text_add_country = new Autocompletetextview (context); Edit_text_add_stock = new EditText (this); Radiogroup containcountry = new Radiogroup (context); Spinner.setid (1); Edit_text_add_country.setid (2); Edit_text_add_stock.setid (3); Containcountry.setid (4); String[] Mcountries = {"We", "USA", "China2", "comunicate"}; list<string> allcountries = new arraylist<string> (); Arrayadapter<string> aspncountries; for (int i = 0; i < mcountries.length; i++) { Allcountries.add (Mcountries[i]); } Aspncountries = new Arrayadapter<string> (This, Android. R.layout.simple_spinner_item, allcountries); Aspncountries . Setdropdownviewresource (Android. R.layout.simple_spinner_dropdown_item); Spinner.setadapter (aspncountries); Edit_text_add_country.setadapter (aspncountries); Edit_text_add_country.sethint ("Input country name"); Edit_text_add_stock.sethint ("Input stock name"); Relativelayout.layoutparams param1, param2, param3; param1 = new Relativelayout.layoutparams (ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT); param2 = new Relativelayout.layoutparams (ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT); Param2.addrule (Relativelayout.below, 1); PARAM3 = new Relativelayout.layoutparams (ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT); Param3.addrule (Relativelayout.below, 4); Viewgroup.layoutparams param4, PARAM5; PARAM4 = new Viewgroup.layoutparams (viewgroup.layoutparams.fill_parent,viewgroup.layoutparams.wrap_content); PARAM5 = new Viewgroup.layoutparams (viewgroup.layoutparams.fill_parent,viewgroup.layoutparams.wrap_content); Containcountry.addview (SPINNER,PARAM4); Containcountry.addview (Edit_text_add_country, PARAM5); Relativelayout.addview (Containcountry, param1); Relativelayout.addview (Edit_text_add_stock, param3); Builder.setview (relativelayout);

Look at an example

Relativelayout code implementation and click Settings

The code is as follows

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Public class Main extends activity {        @Override     Public v OID onCreate (Bundle savedinstancestate) {         super.oncreate ( Savedinstancestate);         Setcontentview (R.layout.main);                arraylist<person> Personlist = new arraylist<person> ();         Personlist.add (New person ("zwx", "23"));         Personlist.add (New person ("zwx1", "24"));         Personlist.add (New person ("zwx2", "25"));                linearlayout ll = ( LinearLayout) Findviewbyid (r.id.linearlayout01); for (person Person:personlist) { Relativelayout RL = new Relativelayout (this); Relativelayout.layoutparams RLL = new Relativelayout.layoutparams (LAYOUTPARAMS.FILL_PARENT,LAYOUTPARAMS.WRAP_ CONTENT); Rl.setlayoutparams (RLL); TextView TV1 = new TextView (this); Relativelayout.layoutparams tv1_rl = new Relativelayout.layoutparams (LAYOUTPARAMS.WRAP_CONTENT,LAYOUTPARAMS.WRAP_ CONTENT); Tv1_rl.addrule (Relativelayout.align_parent_left); Tv1.settext (Person.getname ()); Rl.addview (TV1, TV1_RL); TextView TV2 = new TextView (this); Relativelayout.layoutparams tv2_rl = new Relativelayout.layoutparams (LAYOUTPARAMS.WRAP_CONTENT,LAYOUTPARAMS.WRAP_ CONTENT); Tv2_rl.addrule (Relativelayout.align_parent_right); Tv2.settext (Person.getage ()); Rl.addview (TV2, TV2_RL);           Ll.addview (RL);            Rl.setonclicklistener (New View.onclicklistener () {                       @Override                public void OnClick (View v) {                     Toast.maketext (Main.this, "one", 5000). Show ();                }               }) ;        }    } }

Note: It is not possible to generate a circular dependency between the Relativelayout container itself and his child elements, for example, if the high setting of the relativelayout is not wrap_content, the height of the child element is set to Align_parent _bottom.