Custom ViewGroup added custom view caused by an inability to display the problem (personal)

First of all, I've been searching the internet for a long time and I haven't found a way to explain it, so I tried to write it myself.

1. I have customized a viewgroup that inherits Relativelayout.

The Java code is as follows:

/*** Simple Custom three Avatar *@authorm.z*/ Public classMygroupheaderimgextendsRelativelayout { Publicmygroupheaderimg (Context context, AttributeSet attrs) {Super(context, attrs);  This. Mcontext =context; MView= Inflate (context, r.layout.view_group_head_img, This);    Initview (); }         PublicMygroupheaderimg (context context, AttributeSet attrs,intDefstyle) {         This(context, attrs); }    PrivateContext Mcontext; PrivateCircleprogressbar firstimg,scendimg,threeimg; PrivateView MView; /*** Initialize*/    Private voidInitview () {firstimg=(Circleprogressbar) Mview.findviewbyid (r.id.first_ivavator); Scendimg=(Circleprogressbar) Mview.findviewbyid (r.id.scend_ivavator); Threeimg=(Circleprogressbar) Mview.findviewbyid (r.id.three_ivavator); }        /*** Set URL *@paramAvatorurls*/     Public voidSetavatorarray (string[] avatorurls) {vocimageloader.getinstance (). DisplayImage (avatorurls[0], firstimg, Mydisplayimageoptions.getavatorimageoption (),NULL,NULL); Vocimageloader.getinstance (). DisplayImage (avatorurls[1], scendimg, Mydisplayimageoptions.getavatorimageoption (),NULL,NULL); Vocimageloader.getinstance (). DisplayImage (avatorurls[2], threeimg, Mydisplayimageoptions.getavatorimageoption (),NULL,NULL); }}

The XML layout is as follows:

<?XML version= "1.0" encoding= "Utf-8"?><Relativelayoutxmlns:android= "Http://schemas.android.com/apk/res/android"Xmlns:circlebar= "Http://schemas.android.com/apk/res/com.iflytek.vocation_edu_cloud"Android:layout_width= "Match_parent"Android:layout_height= "Match_parent"android:orientation= "vertical"Android:background= "@android: Color/transparent">    <Com.iflytek.voc_edu_cloud.view.CircleProgressBarAndroid:id= "@+id/scend_ivavator"Android:layout_width= "50DP"Android:layout_height= "50DP"Android:layout_alignright= "@+id/first_ivavator"Android:layout_aligntop= "@+id/first_ivavator"Android:layout_marginright= "19DP"Android:layout_margintop= "32DP"android:contentdescription= "@string/app_name"Circlebar:border_color= "@color/white"circlebar:border_progress= "+"Circlebar:border_width= "1DP"Circlebar:inner_border_color= "#ffffff"circlebar:one_src= "@drawable/defult_avatar" />    <Com.iflytek.voc_edu_cloud.view.CircleProgressBarAndroid:id= "@+id/three_ivavator"Android:layout_width= "50DP"Android:layout_height= "50DP"Android:layout_alignleft= "@+id/first_ivavator"Android:layout_aligntop= "@+id/scend_ivavator"Android:layout_marginleft= "21DP"android:contentdescription= "@string/app_name"Circlebar:border_color= "@color/white"circlebar:border_progress= "+"Circlebar:border_width= "1DP"Circlebar:inner_border_color= "#ffffff"circlebar:one_src= "@drawable/defult_avatar" />    <Com.iflytek.voc_edu_cloud.view.CircleProgressBarAndroid:id= "@+id/first_ivavator"Android:layout_width= "50DP"Android:layout_height= "50DP"Android:layout_centerhorizontal= "true"android:contentdescription= "@string/app_name"Circlebar:border_color= "@color/white"circlebar:border_progress= "+"Circlebar:border_width= "1DP"Circlebar:inner_border_color= "#ffffff"circlebar:one_src= "@drawable/defult_avatar" /></Relativelayout>

Because my layout custom viewgroup contains a custom view, and there is a xmlns:circlebar= "Http://schemas.android.com/apk/res/com.iflytek.vocation_edu_cloud"

That caused me to call a blank call when the XML is as follows:

< com.iflytek.voc_edu_cloud.view.MyGroupHeaderImg        android:id= "@+id/member_item_ivavator"       android:layout_width= "80DP"         android:layout_height= "80DP"       android:layout_alignparentleft  = "true"       android:contentdescription= "@string/app_name"   />

Workaround:

To solve the problem of not showing is also very simple is to call the place to add this sentence xmlns:circlebar= "Http://schemas.android.com/apk/res/com.iflytek.vocation_edu_cloud" As follows:

< com.iflytek.voc_edu_cloud.view.MyGroupHeaderImg          Xmlns:circlebar = "Http://schemas.android.com/apk/res/com.iflytek.vocation_edu_cloud"          android:id= "@+id/member_item_ivavator"         android:layout_width= "80DP"           android:layout_height= "80DP"         android:layout_alignparentleft = "true"          android:contentdescription= "@string/app_name"         />

After that, it can be used normally.

Add custom view in custom ViewGroup the problem cannot be displayed (personal)