Implementation of multi-layer dynamic nested layout in Android

1. Concept: when developing complex interfaces, especially tablet pages, the interface layout is often much more complex than the mobile phone layout. In this case, nested layout is required. At the same time, to achieve a certain effect, local pages must be dynamically changed. The most typical is to use multiple viewpager in a page. When the pages where viewpager is located are dynamic, You need to implement multi-layer linearlayout nesting. For example, for a tag page, the header is static, and the content is dynamically changed. At the same time, each content needs to be dynamically changed,CodeYou need to add multiple times for implementation.

2. The following is a simple case (this case only implements multi-layer nested addition. To achieve dynamic addition, you only need to change the content added each time through the control conditions .)

 
Padtestactivity. Java
 

 Package  Com. Devin;  Import  Android. App. activity;  Import  Android. OS. Bundle;  Import  Android. View. layoutinflater;  Import Android. widget. linearlayout;  Public   Class Padtestactivity Extends  Activity {  /**  Called when the activity is first created.  */  @ Override  Public   Void  Oncreate (bundle savedinstancestate ){  Super . Oncreate (savedinstancestate); setcontentview (R. layout. Main); layoutinflater Inflater = Getlayoutinflater ();  //  Add first page Linearlayout myfirst = (Linearlayout) Inflater. Inflate (R. layout. First,  Null  ). Findviewbyid (R. Id. myfirst); linearlayout layoutmain = (Linearlayout) findviewbyid (R. Id. layoutmain); layoutmain. removeallviews (); layoutmain. addview (myfirst );  // Show the page first  //  Add second page Linearlayout mysecond = (Linearlayout) Inflater. Inflate (R. layout. Second,  Null  ). Findviewbyid (R. Id. mysecond); linearlayout layoutfirst = (Linearlayout) findviewbyid (R. Id. layoutfirst); layoutfirst. addview (mysecond );  //  Add Third page Linearlayout mythird = (Linearlayout) Inflater. Inflate (R. layout. Third, Null  ). Findviewbyid (R. Id. mythird); linearlayout layoutsecond = (Linearlayout) findviewbyid (R. Id. layoutsecond); layoutsecond. addview (mythird );}} 

Layout code

Main. xml

 <?  XML version = "1.0" encoding = "UTF-8"  ?>  <  Linearlayout  Xmlns: Android  = "Http://schemas.android.com/apk/res/android"  Android: layout_width = "Fill_parent"  Android: layout_height  = "Fill_parent"  Android: Orientation  = "Vertical"   >      <  Textview  Android: layout_width  = "Fill_parent"  Android: layout_height  = "Wrap_content"  Android: Text  = "Main page"   />     <  Linearlayout  Android: ID  = "@ + ID/layoutmain"  Android: layout_width  = "Fill_parent"  Android: layout_height  = "Fill_parent"   >      </  Linearlayout  >      <  Textview  Android: layout_width = "Fill_parent"  Android: layout_height  = "Wrap_content"  Android: Text  = "Main page"   />  </  Linearlayout  > 

First. xml

 <?  XML version = "1.0" encoding = "UTF-8"  ?>  <  Linearlayout  Xmlns: Android = "Http://schemas.android.com/apk/res/android"  Android: ID  = "@ + ID/myfirst"  Android: layout_width  = "Match_parent"  Android: layout_height  = "Match_parent"  Android: Orientation  = "Vertical"   >      <  Textview  Android: layout_width  = "Fill_parent" Android: layout_height  = "Wrap_content"  Android: Text  = "First page"   />      <  Linearlayout  Android: ID  = "@ + ID/layoutfirst"  Android: layout_width  = "Fill_parent"  Android: layout_height  = "Fill_parent"   >      </ Linearlayout  >      <  Textview  Android: layout_width  = "Fill_parent"  Android: layout_height  = "Wrap_content"  Android: Text  = "First page"   />  </  Linearlayout  > 

Second. xml

 <? XML version = "1.0" encoding = "UTF-8"  ?>  <  Linearlayout  Xmlns: Android  = "Http://schemas.android.com/apk/res/android"  Android: ID  = "@ + ID/mysecond"  Android: layout_width  = "Match_parent"  Android: layout_height  = "Match_parent"  Android: Orientation  = "Vertical"  >      <  Textview  Android: layout_width  = "Fill_parent"  Android: layout_height  = "Wrap_content"  Android: Text  = "Second page"   />      <  Linearlayout  Android: ID  = "@ + ID/layoutsecond"  Android: layout_width = "Fill_parent"  Android: layout_height  = "Fill_parent"   >      </  Linearlayout  >      <  Textview  Android: layout_width  = "Fill_parent"  Android: layout_height  = "Wrap_content"  Android: Text  = "Second page"  />  </  Linearlayout  > 

Third. xml

 <?  XML version = "1.0" encoding = "UTF-8"  ?>  <  Linearlayout  Xmlns: Android  = "Http://schemas.android.com/apk/res/android"  Android: ID  = "@ + ID/mythird"  Android: layout_width = "Match_parent"  Android: layout_height  = "Match_parent"  Android: Orientation  = "Vertical"   >      <  Textview  Android: layout_width  = "Fill_parent"  Android: layout_height  = "Wrap_content"  Android: Text  = "Third page"   />     <  Linearlayout  Android: ID  = "@ + ID/layoutthird"  Android: layout_width  = "Fill_parent"  Android: layout_height  = "Fill_parent"   >      </  Linearlayout  >      <  Textview  Android: layout_width = "Fill_parent"  Android: layout_height  = "Wrap_content"  Android: Text  = "Third page"   />  </  Linearlayout  >