Android创建和配置布局动画
16lz
2021-01-23
demo1：为布局添加动画效果
运行效果：
View布局：
<?xml version="1.0" encoding="utf-8"?> Control层代码：
public class MainActivity extends AppCompatActivity { private ConstraintLayout constraint; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); constraint=findViewById(R.id.constraint); ScaleAnimation scale=new ScaleAnimation(0,1,0,1);//定义一个缩放动画 scale.setDuration(5000); //LayoutAnimationController:可以控制一组控件按照规定显示,用于一个布局或者ViewGroup的动画控制器， // 它能够让每个子View在不同的时间点分别执行相同的动画 LayoutAnimationController controller=new LayoutAnimationController(scale,0.5f);//item动画延时，控件出来一半时下一个出 controller.setOrder(LayoutAnimationController.ORDER_NORMAL);//控件出来的顺序 constraint.setLayoutAnimation(controller);//部署到布局中 }}
demo2：布局内容改变动画
运行效果：
View布局：
<?xml version="1.0" encoding="utf-8"?> Control层代码：
public class LayoutChangeAnimation extends AppCompatActivity { private LinearLayout linearLayout; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_layout_change_animation); linearLayout=findViewById(R.id.linear); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.main,menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { if (item.getItemId()==R.id.action_add){ Button add_button=new Button(this); add_button.setText("remove me"); add_button.setTextSize(24); linearLayout.addView(add_button);//布局中添加button add_button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { linearLayout.removeView(v);//移除button } }); } return super.onOptionsItemSelected(item); }}
demo3：为列表添加布局动画效果
运行效果：
View布局：
<?xml version="1.0" encoding="utf-8"?> 资源配置文件anim:
item动画scale.xml：
<?xml version="1.0" encoding="utf-8"?>主布局动画list_view_anim.xml:
<?xml version="1.0" encoding="utf-8"?>Control层代码：
public class ListViewLayoutAnimation extends ListActivity{ //ListActivity类中集成了一个ListView控件。 //通过继承ListActivity类可方便地使用ListView控件 private ArrayAdapter arrayAdapter; //private ScaleAnimation scaleAnimation; //private LayoutAnimationController controller; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); String[] strings=new String[]{"小明","小红","小兰","小绿","小明","小红","小兰","小绿","小明", "小红","小兰","小绿","小明","小红","小兰","小绿","小明","小红","小兰","小绿","小明", "小红","小兰","小绿","小明","小红","小兰","小绿","小明","小红","小兰","小绿"}; //添加子布局和数据 arrayAdapter=new ArrayAdapter<>(this,android.R.layout.simple_list_item_1,strings); setListAdapter(arrayAdapter);//部署适配器 //第一种方法：Java代码// scaleAnimation=new ScaleAnimation(0,1,0,1);// scaleAnimation.setDuration(1000);// controller=new LayoutAnimationController(scaleAnimation,0.5f);//// getListView().setLayoutAnimation(controller);//getListView():获取ListActivity自带的ListView对象 //第二种方法：布局文件的配置 setContentView(R.layout.activity_listview_layout_animation); }}
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