Apply animations on layout changes using LayoutTransition

LayoutTransition (Added in API level 11) enables automatic animations on layout changes in ViewGroup objects.

example:

LayoutTransition transition = new LayoutTransition();

container.setLayoutTransition(transition);

It's the default animations effect apply on the dynamic view in last exercise "Add and Remove view dynamically".

Modify MainActivity.java from last exercise.

- Apply LayoutTransition on container of LinearLayout.

- To made the effect noticeable, insert dynamic view in front by calling container.addView(addView, 0) instead of container.addView(addView).

- Modify AndroidManifest.xml to have minSdkVersion="11".

package com.example.androiddynamicview;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.LinearLayout;

import android.widget.TextView;

import android.animation.LayoutTransition;

import android.app.Activity;

import android.content.Context;

public class MainActivity extends Activity {

 EditText textIn;

 Button buttonAdd;

 LinearLayout container;

 @Override

 protected void onCreate(Bundle savedInstanceState) {

  super.onCreate(savedInstanceState);

  setContentView(R.layout.activity_main);

  textIn = (EditText)findViewById(R.id.textin);

  buttonAdd = (Button)findViewById(R.id.add);

  container = (LinearLayout)findViewById(R.id.container);

  

  buttonAdd.setOnClickListener(new OnClickListener(){

   @Override

   public void onClick(View arg0) {

    LayoutInflater layoutInflater = 

      (LayoutInflater) getBaseContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    final View addView = layoutInflater.inflate(R.layout.row, null);

    TextView textOut = (TextView)addView.findViewById(R.id.textout);

    textOut.setText(textIn.getText().toString());

    Button buttonRemove = (Button)addView.findViewById(R.id.remove);

    buttonRemove.setOnClickListener(new OnClickListener(){

     @Override

     public void onClick(View v) {

      ((LinearLayout)addView.getParent()).removeView(addView);

     }});

    

    container.addView(addView, 0);

   }});

  

  LayoutTransition transition = new LayoutTransition();

  container.setLayoutTransition(transition);

  

 }

}

Related:

To apply Android 3.0 animation API on old devices, NineOldAndroids is an alternative.