2C02-View-Layout-Animation-list-Cascade

描述list layout item有上倒下依次显示的代码实现形式

LayoutAnimation2.java

/* * Copyright (C) 2007 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 com.example.android.apis.view;import android.app.ListActivity;import android.os.Bundle;import android.view.animation.AlphaAnimation;import android.view.animation.Animation;import android.view.animation.AnimationSet;import android.view.animation.LayoutAnimationController;import android.view.animation.TranslateAnimation;import android.widget.ArrayAdapter;import android.widget.ListView;public class LayoutAnimation2 extends ListActivity {    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setListAdapter(new ArrayAdapter<String>(this,                android.R.layout.simple_list_item_1, mStrings));        AnimationSet set = new AnimationSet(true);        Animation animation = new AlphaAnimation(0.0f, 1.0f);        animation.setDuration(50);        set.addAnimation(animation);        animation = new TranslateAnimation(            Animation.RELATIVE_TO_SELF, 0.0f,Animation.RELATIVE_TO_SELF, 0.0f,            Animation.RELATIVE_TO_SELF, -1.0f,Animation.RELATIVE_TO_SELF, 0.0f        );        animation.setDuration(100);        set.addAnimation(animation);        LayoutAnimationController controller = new LayoutAnimationController(set, 0.5f);        ListView listView = getListView();                listView.setLayoutAnimation(controller);    }    private String[] mStrings = {        "Bordeaux",        "Lyon",        "Marseille",        "Nancy",        "Paris",        "Toulouse",        "Strasbourg"    };}