Use the animateLayoutChanges tag in XML to automate transition animations as items are removed from or added to a container. : Layout « UI « Android

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Android » UI » Layout 
Use the animateLayoutChanges tag in XML to automate transition animations as items are removed from or added to a container.
    

/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package app.test;


import android.view.View;
import android.view.ViewGroup;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;

/**
 * This application demonstrates how to use the animateLayoutChanges tag in XML to automate
 * transition animations as items are removed from or added to a container.
 */
public class Test extends Activity {

    private int numButtons = 1;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        final ViewGroup horizontalContainer = (ViewGroupfindViewById(R.id.horizontalContainer);
        final ViewGroup verticalContainer = (ViewGroupfindViewById(R.id.verticalContainer);

        Button addButton = (ButtonfindViewById(R.id.addNewButton);
        addButton.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                Button newButton = new Button(Test.this);
                newButton.setText("Click To Remove " (numButtons++));
                newButton.setOnClickListener(new View.OnClickListener() {
                    public void onClick(View v) {
                        horizontalContainer.removeView(v);
                    }
                });
                horizontalContainer.addView(newButton, Math.min(1, horizontalContainer.getChildCount()));

                newButton = new Button(Test.this);
                newButton.setText("Click To Remove " (numButtons++));
                newButton.setOnClickListener(new View.OnClickListener() {
                    public void onClick(View v) {
                        verticalContainer.removeView(v);
                    }
                });
                verticalContainer.addView(newButton, Math.min(1, verticalContainer.getChildCount()));
            }
        });
    }

}
//main.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C2010 The Android Open Source Project

     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at

          http://www.apache.org/licenses/LICENSE-2.0

     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,
     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     See the License for the specific language governing permissions and
     limitations under the License.
-->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Add Button"
        android:id="@+id/addNewButton"
        />
    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/horizontalContainer"
        android:animateLayoutChanges="true"
        />
    <LinearLayout
        android:orientation="vertical"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:id="@+id/verticalContainer"
        android:animateLayoutChanges="true"
        />
</LinearLayout>

   
    
    
    
  
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