Android Animation(动画)---基础二(LayoutAnimationController)
LayoutAnimationController动画效果，一次出现 一、布局文件使用 动画list_item_layout.xml <?xml version="1.0" encoding="utf-8"?> <layoutAnimation xmlns:android="http://schemas.android.com/apk/res/android" android:animation="@anim/list_item_alpha" android:animationOrder="normal" android:delay="0.8" /> 每个列表项动画list_item_alpha.xml <?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android"> <alpha android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="2000" /> </set> 主界面布局文件activity_main.xml 特别注意要在ListView中添加android:layoutAnimation="@anim/list_item_layout" <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context="com.mazaiting.layoutanimationcontroller.MainActivity" > <ListView android:id="@+id/listView" android:layoutAnimation="@anim/list_item_layout" android:layout_width="match_parent" android:layout_height="wrap_content" /> <Button android:text="测试" android:onClick="test" android:layout_width="match_parent" android:layout_height="wrap_content" /> <Button android:text="清空" android:onClick="clear" android:layout_width="match_parent" android:layout_height="wrap_content" /> </LinearLayout> 列表布局文件item_list.xml <?xml version="1.0" encoding="utf-8"?> <TextView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center" android:text="@string/app_name" android:textSize="20sp" /> 主界面代码 public class MainActivity extends AppCompatActivity { private ListView mListView; private static final String[] STRINGS = { "BruceZhang", "Alpha", "Translate", "Blanklin", "Rotate", "GreenFrank" }; private ArrayAdapter<String> mAdapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mListView = (ListView) this.findViewById(R.id.listView); mAdapter = new ArrayAdapter<>(this, R.layout.item_list, STRINGS); } public void test(View view) { mListView.setAdapter(mAdapter); } public void clear(View view) { mListView.setAdapter(null); } } 二、代码配置 动画文件 <?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android"> <alpha android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="2000" /> </set> 主界面布局文件 <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context="com.mazaiting.layoutanimationcontroller.MainActivity" > <ListView android:id="@+id/listView" android:layout_width="match_parent" android:layout_height="wrap_content" /> <Button android:text="测试" android:onClick="test" android:layout_width="match_parent" android:layout_height="wrap_content" /> <Button android:text="清空" android:onClick="clear" android:layout_width="match_parent" android:layout_height="wrap_content" /> </LinearLayout> 主界面动画设置 public class MainActivity extends AppCompatActivity { private ListView mListView; private static final String[] STRINGS = { "BruceZhang", "Alpha", "Translate", "Blanklin", "Rotate", "GreenFrank" }; private ArrayAdapter<String> mAdapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mListView = (ListView) this.findViewById(R.id.listView); mAdapter = new ArrayAdapter<>(this, R.layout.item_list, STRINGS); // 1. 创建一个Animation对象 Animation animation = AnimationUtils.loadAnimation(this, R.anim.list_item_alpha); // 2. 使用如下代码创建LayoutAnimationController对象 LayoutAnimationController lac = new LayoutAnimationController(animation); // 3. 设置控件显示的顺序 lac.setOrder(LayoutAnimationController.ORDER_RANDOM); // 4. 为ListView设置LayoutAnimationController尚需经 mListView.setLayoutAnimation(lac); } public void test(View view) { mListView.setAdapter(mAdapter); } public void clear(View view) { mListView.setAdapter(null); } }
