Two ways to add view dynamically in Android

First, the way to use XML:

1, Layoutinflater:

This class parses the layout of the XML representation into a view so that the AddView () method can be added to the view.

2, the difference between Layoutinflater and Findviewbyid:

Both instantiate an object, but the Findviewbyid is instantiated by looking for a specific widget control under the XML layout file, and Layoutinflater is looking for an XML layout file under Res/layout.

3. How to use:

Layoutinflater inflater= (Layoutinflater) Context.getsystemservice (Context.layout_inflater_service);

Layoutinflater Inflater=layoutinflater.from (activity.this);

Layoutinflater Inflater=getlayoutinflater ();

These three ways are essentially the same.

4, Inflate ():

Use Inflate () to parse the XML into a view

Inflaer.inflate (r.layout.xml filename, parent);

Example:

1 <LinearLayoutxmlns:android= "Http://schemas.android.com/apk/res/android"2 Android:layout_width= "Wrap_content"3 Android:layout_height= "Wrap_content"4 android:orientation= "vertical" >5 6     <LinearLayout7         Android:id= "@+id/container"8 Android:layout_width= "Wrap_content"9 Android:layout_height= "Wrap_content" >Ten     </LinearLayout> One  A </LinearLayout>

Main.xml

1<LinearLayoutXmlns:android= "Http://schemas.android.com/apk/res/android"2Android:layout_width= "Wrap_content"3Android:layout_height= "Wrap_content"4Android:orientation= "vertical" > 5 Span style= "color: #008080;" > 6 <textview 7 android:layout_width= "wrap_content"  8  Android:layout_height= "wrap_content"  9  Android:text= "Hello word" />10 11 </>          

View.xml

1  Public classMainextendsActivity {2 3 @Override4  protected voidonCreate (Bundle savedinstancestate) {5   Super. OnCreate (savedinstancestate);6 Setcontentview (r.layout.main);7 addView1 ();8 addView2 ();9 addView3 ();Ten addView4 (); One  } A  - Private voidAddView1 () { -LinearLayout container =(LinearLayout) Findviewbyid (r.id.container); theLayoutinflater Inflater = This. Getlayoutinflater (); -LinearLayout view =(linearlayout) Inflater -. Inflate (R.layout.view,NULL); - Container.addview (view); +  } -  + Private voidaddView2 () { ALinearLayout container =(LinearLayout) Findviewbyid (r.id.container); atLayoutinflater Inflater = Layoutinflater.from ( This); -LinearLayout view =(linearlayout) Inflater -. Inflate (R.layout.view,NULL); - Container.addview (view); -  } -  in Private voidaddView3 () { -LinearLayout container =(LinearLayout) Findviewbyid (r.id.container); toLayoutinflater Inflater = (layoutinflater) This + . Getsystemservice (context.layout_inflater_service); -LinearLayout view =(linearlayout) Inflater the. Inflate (R.layout.view,NULL); * Container.addview (view); $  }Panax Notoginseng  - Private voidaddView4 () { theLinearLayout container =(LinearLayout) Findviewbyid (r.id.container); +LinearLayout view = This. Getlayoutinflater (). Inflate (R.layout.view, A container); the  } +  -}

Main.java

The four AddView () methods are essentially the same.

Second, the way to use Java:

1 Private voidAddviewbyjava () {2LinearLayout container =NewLinearLayout ( This);//Main layout Container3TextView TV =NewTextView ( This);//Sub View TextView4     //Set layout parameters for the main layout container5Linearlayout.layoutparams LLP =NewLinearlayout.layoutparams (6 layoutparams.fill_parent, layoutparams.wrap_content);7Container.setlayoutparams (LLP);//set the layout of container8Container.setorientation (linearlayout.horizontal);//set the orientation of the main layout9     //Set layout parameters for child viewTenViewgroup.layoutparams VLP =NewViewgroup.layoutparams ( One ViewGroup.LayoutParams.WRAP_CONTENT, A ViewGroup.LayoutParams.WRAP_CONTENT); -Tv.setlayoutparams (VLP);//set the layout of TextView -Tv.settext ("Hello word"); theContainer.addview (TV);//add TextView to Container -}

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Two ways to add view dynamically in Android