利用Property Animation(属性卡通片)使组件的背景色渐变

利用Property Animation(属性动画)使组件的背景色渐变

MainActivity如下:

package cc.testpropertyanimation;

import android.os.Bundle;
import android.view.View;
import android.widget.RelativeLayout;
import android.animation.AnimatorInflater;
import android.animation.ArgbEvaluator;
import android.animation.ObjectAnimator;
import android.app.Activity;
import android.content.Context;
/**
 * Demo描述:
 * 利用Property Animation(属性动画)使组件的背景色渐变
 * 
 * 参考资料
 * Android疯狂讲义(第二版) 作者李刚
 * Thank you very much
 *
 */
public class MainActivity extends Activity {
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		init();
	}
	
	private void init(){
		RelativeLayout relativeLayout=(RelativeLayout) findViewById(R.id.relativeLayout);
		AnimationView animationView=new AnimationView(this);
		relativeLayout.addView(animationView);
	}

	public class AnimationView extends View{
		public AnimationView(Context context) {
			super(context);
		    ObjectAnimator objectAnimator=
		    (ObjectAnimator) AnimatorInflater.loadAnimator(MainActivity.this, R.animator.coloranimation);
		    objectAnimator.setEvaluator(new ArgbEvaluator());
		    objectAnimator.setTarget(this);
		    objectAnimator.start();
		}
		
	}
}

coloranimation.xml如下:

<?xml version="1.0" encoding="utf-8"?>
<objectAnimator xmlns:android="http://schemas.android.com/apk/res/android"
	android:propertyName="backgroundColor"
	android:duration="5000"
	android:valueFrom="#ff0033"
	android:valueTo="#000099"
	android:repeatCount="infinite"
	android:repeatMode="reverse"
	android:valueType="intType">
</objectAnimator>

 

main.xml如下:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/relativeLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

</RelativeLayout>