Android基于TranslateAnimation的动画动态菜单
Class TranslateAnimation的使用:Animation有两种定义方法,一种是用Java code,一种是用XML,这里只介绍用code来定义(因为用XML来定义的那种我没用过。。嘿嘿。。)。多的不说,看代码。
这里是TranslateAnimationMenu.java(我在里面还另加入了ScaleAnimation产生的动画,各位朋友可以照着SDK以及程序效果来理解):
package com.TranslateAnimation.Menu;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.Button;
import android.widget.LinearLayout;
public class TranslateAnimationMenu extends Activity {
/** Called when the activity is first created. */
//TranslateAnimation showAction, hideAction;
Animation showAction, hideAction;
LinearLayout menu;
Button button;
boolean menuShowed;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
menu = (LinearLayout) findViewById(R.id.menu);
button = (Button) findViewById(R.id.button);
// 这里是TranslateAnimation动画
showAction = 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);
// 这里是ScaleAnimation动画
//showAction = new ScaleAnimation(
// 1.0f, 1.0f, 0.0f, 1.0f, Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF, 0.0f);
showAction.setDuration(500);
// 这里是TranslateAnimation动画
hideAction = new TranslateAnimation(
Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF, 0.0f,
Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF, -1.0f);
// 这里是ScaleAnimation动画
//hideAction = new ScaleAnimation(
// 1.0f, 1.0f, 1.0f, 0.0f, Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF, 0.0f);
hideAction.setDuration(500);
menuShowed = false;
menu.setVisibility(View.GONE);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (menuShowed) {
menuShowed = false;
menu.startAnimation(hideAction);
menu.setVisibility(View.GONE);
}
else {
menuShowed = true;
menu.startAnimation(showAction);
menu.setVisibility(View.VISIBLE);
}
}
});
}
}
这里是main.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView android:layout_width="fill_parent"
android:layout_height="wrap_content" android:text="@string/hello" />
<LinearLayout android:id="@+id/menu"
android:layout_height="100px" android:layout_width="fill_parent"
android:layout_alignParentTop="true" android:background="#ffffff">
<TextView android:layout_width="fill_parent"
android:layout_height="fill_parent" android:text="I am a menu"
android:gravity="center" />
</LinearLayout>
<Button android:id="@+id/button" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:layout_alignParentBottom="true"
android:text="Click to show/hide menu" />
</RelativeLayout>