实现一个点击菜单动画添加按钮，点击按钮移除当前按钮的动画效果；
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/linerLayout1"
android:orientation="vertical" // 如果要实现动画效果的话，此选项要设置为true
android:animateLayoutChanges="true"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
</LinearLayout>为应用添加一个菜单 res/menu/main.xml，添加一个菜单项：
<item android:id="@+id/action_add"
android:showAsAction="always"
android:icon="@android:drawable/ic_input_add" />代码：
private LinearLayout layout1;
private OnClickListener btnOnClickListener=new OnClickListener() {
@Override
public void onClick(View v) {
//移除按钮时，使用由大到小的缩放效果，然后移除按钮
ScaleAnimation scale=new ScaleAnimation(1,0,1,0,Animation.RELATIVE_TO_SELF,0.5f,Animation.RELATIVE_TO_SELF,0.5f);
scale.setDuration(1000);
v.startAnimation(scale);
layout1.removeView(v);
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
layout1=(LinearLayout)findViewById(R.id.linerLayout1);
}
private void addButton() {
//添加按钮并且为按钮实现一个缩放的动画效果，使按钮可以从小到大实现缩放
Button btn=new Button(this);
btn.setText("Remove me");
ScaleAnimation scale=new ScaleAnimation(0,1,0,1,Animation.RELATIVE_TO_SELF,0.5f,Animation.RELATIVE_TO_SELF,0.5f);
scale.setDuration(1000);
btn.setAnimation(scale);
//实现OnClick监听，当点击按钮的时候移除按钮
btn.setOnClickListener(btnOnClickListener);
layout1.addView(btn);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_settings:
return true;
case R.id.action_add:
//如果点击的菜单是添加的菜单的话，则执行添加按钮操作
addButton();
break;
default:
break;
}
return super.onOptionsItemSelected(item);
}
点击Remove 按钮的时候：
