The following code shows how to Use LayoutTransition.
Main layout xml file
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/container" android:layout_width="match_parent" android:layout_height="match_parent" > <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="19dp" android:onClick="onClick" android:text="Button" /> </LinearLayout>
Menu main.xml file
<menu xmlns:android="http://schemas.android.com/apk/res/android"> <item android:id="@+id/menu_settings" android:title="menu_settings" android:orderInCategory="100" android:showAsAction="never" /> </menu>
Main Activity Java code
import android.animation.LayoutTransition; import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.View; import android.view.ViewGroup; import android.widget.Button; /*from w w w .j a va 2s .co m*/ public class MainActivity extends Activity { private ViewGroup viewGroup; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); LayoutTransition l = new LayoutTransition(); l.enableTransitionType(LayoutTransition.CHANGING); viewGroup = (ViewGroup) findViewById(R.id.container); viewGroup.setLayoutTransition(l); } public void onClick(View view) { viewGroup.addView(new Button(this)); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.activity_main, menu); return true; } }