Android Custom Layouts

1. Create a new property file first

<?xml version= "1.0" encoding= "Utf-8"?><resources> <declare-styleable    name= "Topbar" >        <attr name= "title" format= "string"/>        <attr name= "titletextsize" format= "Dimension"/>        <attr Name= "Titletextcolor" format= "color"/>                <attr name= "Lefttext" format= "string"/> <attr        name= " Lefttextbackgroud "  format=" Reference|color "/>        <attr name=" lefttextcolor "format=" Color "/>                 <attr name= "Righttext" format= "string"/>        <attr name= "Righttextbackgroud"  format= "reference| Color "/>        <attr name=" righttextcolor "format=" color "/>    </declare-styleable></ Resources>

2. Create a custom layout class

public class Topbar extends Relativelayout {//custom control private Button LeftButton, Rightbutton;private TextView tvtitle;// Custom properties Private int lefttextcolor;private drawable leftbackground;private String lefttext;private int righttextcolor; Private drawable rightbackground;private string righttext;private string titletext;private float titletextsize;private int titletextcolor;private topbarlistener tlistener;public void Settlistener (Topbarlistener tListener) { This.tlistener = Tlistener;} public interface topbarlistener{public void Clickleft ();p ublic void Clickright (); Private Layoutparams Leftparams,rightparams,titleparams; @SuppressLint ("Newapi") public Topbar (context context, AttributeSet attrs) {Super (context, attrs);//TODO auto-generated constructor stub//Get property value Typedarray ta = Context.obtainstyledattributes (Attrs, r.styleable.topbar); lefttextcolor = Ta.getcolor (R.styleable.topbar_ Lefttextcolor, 0); leftbackground = Ta.getdrawable (r.styleable.topbar_lefttextbackgroud); leftText = Ta.getString ( R.stYleable.topbar_lefttext); Righttextcolor = Ta.getcolor (r.styleable.topbar_righttextcolor, 0); RightBackGround = Ta.getdrawable (r.styleable.topbar_righttextbackgroud); righttext = ta.getstring (R.styleable.topbar_righttext); TitleText = ta.getstring (r.styleable.topbar_title); titletextsize = Ta.getdimension (r.styleable.topbar_ Titletextsize, 0); Titletextcolor = Ta.getcolor (r.styleable.topbar_titletextcolor, 0); ta.recycle ();// Initializes the control LeftButton = New button (context), Rightbutton = New button (context), Tvtitle = new TextView (context); Leftbutton.settext (Lefttext); Leftbutton.setbackground (Leftbackground); Leftbutton.settextcolor (LeftTextColor); Rightbutton.settext (Righttext); Rightbutton.settextcolor (Righttextcolor); Rightbutton.setbackground ( Rightbackground); Tvtitle.settext (TitleText); tvtitle.settextsize (titletextsize); Tvtitle.settextcolor ( Titletextcolor); tvtitle.setgravity (Gravity.center); SetBackgroundColor (0xfff5346); leftparams = new LayoutParams ( Viewgroup.layoutparams.wrap_content,layoutparams.wrap_conTENT); Leftparams.addrule (relativelayout.align_parent_left,true); AddView (LeftButton, leftparams); rightParams = new Layoutparams (viewgroup.layoutparams.wrap_content,layoutparams.wrap_content); Rightparams.addrule ( Relativelayout.align_parent_right,true); AddView (Rightbutton, rightparams); titleparams = new LayoutParams ( viewgroup.layoutparams.wrap_content,layoutparams.match_parent); Titleparams.addrule (RelativeLayout.CENTER_IN_ Parent,true); AddView (Tvtitle, titleparams); Leftbutton.setonclicklistener (new View.onclicklistener () {@ overridepublic void OnClick (View arg0) {//TODO auto-generated method Stubtlistener.clickleft ();}}); Rightbutton.setonclicklistener (New View.onclicklistener () {@Overridepublic void OnClick (View arg0) {//TODO Auto-generated method Stubtlistener.clickright ();}});}}

3. Create a listener event and use

public class Mainactivity extends Activity {topbar top  ; @Overrideprotected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (r.layout.activity_main); top = (Topbar) Findviewbyid (R.id.myTop ); Top.settlistener (new Topbarlistener () {@Overridepublic void Clickright () {//TODO auto-generated method Stubtoast.maketext (Getapplicationcontext (), "clicked the right Button!", "()." Show (); @Overridepublic void Clickleft () {//TODO auto-generated method Stubtoast.maketext (Getapplicationcontext (), "clicked The left button! ", +). Show ();}}); @Overridepublic boolean Oncreateoptionsmenu (Menu menu) {//Inflate the menu; This adds items to the action bar if it is PR Esent.getmenuinflater (). Inflate (R.menu.main, menu); return true;}}

<relativelayout xmlns:android= "http://schemas.android.com/apk/res/android" xmlns:custom= "http// Schemas.android.com/apk/res/com.example.topbardemo "android:layout_width=" Match_parent "android:layout_height=" Match_parent "android:paddingbottom=" @dimen/activity_vertical_margin "android:paddingleft=" @dimen/activity_ Horizontal_margin "android:paddingright=" @dimen/activity_horizontal_margin "android:paddingtop=" @dimen/activity_ Vertical_margin "> <com.example.topbardemo.topbar android:id=" @+id/mytop "Android:layout_width=" mat Ch_parent "android:layout_height=" 40DP "custom:lefttext=" left "custom:lefttextcolor=" #003300 "CUSTOM:LEFTTEXTB Ackgroud= "#00BFFF" custom:title= "title" custom:titletextcolor= "#000000" custom:titletextsize= "14SP" Custom:rig Httext= "Right" custom:righttextcolor= "#000000" custom:righttextbackgroud= "#00BFFF" > </com.example.topbarde Mo. Topbar></relativelayout>

Some notes:1, in use, need to customize the reference value, xmlns:custom= "http://schemas.android.com/apk/res/xxx" XXX is the project package name2, the use of Typedarray need to release resources ta.recycle ();
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Android Custom Layouts