android动画案例，淡入淡出效果

转载请注明出处：http://blog.csdn.net/droyon/article/details/8689249

源代码下载

1、android动画测试程序，界面如图：

颜色随机变化，点击视图，左淡出，右淡入，下淡出，上淡入效果。

主要源代码解析：

package com.example.objectanimatortest;

import java.util.Random;

import android.os.Build;
import android.os.Bundle;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.AnimatorSet;
import android.animation.ArgbEvaluator;
import android.animation.IntEvaluator;
import android.animation.ObjectAnimator;
import android.animation.ValueAnimator;
import android.annotation.TargetApi;
import android.app.Activity;
import android.graphics.Color;
import android.view.Menu;
import android.view.TextureView;
import android.view.View;
import android.view.animation.AccelerateInterpolator;
import android.view.animation.DecelerateInterpolator;
import android.widget.TextView;

@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public class MainActivity extends Activity implements View.OnClickListener{
	private TextView[] tv;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.objectanimatortest);
		tv = new TextView[]{
			(TextView) findViewById(R.id.tv01),
			(TextView) findViewById(R.id.tv02),
			(TextView) findViewById(R.id.tv03),
			(TextView) findViewById(R.id.tv04),
			
			(TextView) findViewById(R.id.tv11),
			(TextView) findViewById(R.id.tv12),
			(TextView) findViewById(R.id.tv13),
			(TextView) findViewById(R.id.tv14)
		};
		initTextViews();
	}
	private void initTextViews(){
		for(TextView textView :tv){//颜色随机变化代码    使用ValueAnimator类给每个视图加上北京颜色随时间变化的动画
			int color1 = Color.rgb((new Random()).nextInt(255), (new Random()).nextInt(255), (new Random()).nextInt(255)) ;
			int color2 = Color.rgb((new Random()).nextInt(255), (new Random()).nextInt(255), (new Random()).nextInt(255)) ;
			ValueAnimator animator = ObjectAnimator.ofInt(textView, "backgroundColor", color1,color2);
			animator.setDuration(3000);
			animator.setEvaluator(new ArgbEvaluator());//设置数值计算器，保证动画变化过程中的数值正确
			animator.setRepeatCount(ValueAnimator.INFINITE);
			animator.setRepeatMode(ValueAnimator.REVERSE);
			animator.start();
			
			textView.setOnClickListener(this);
		}
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		//getMenuInflater().inflate(R.menu.activity_main, menu);
		return true;
	}
	@Override
	public void onClick(final View view) {
		final ValueAnimator animator1 = ObjectAnimator.ofFloat(view, "alpha",1,0);//淡出效果
		animator1.setDuration(1000);
		animator1.setInterpolator(new AccelerateInterpolator());
		ValueAnimator animator2 = ObjectAnimator.ofFloat(view,"x",view.getX(),(view.getX()-view.getWidth()));//向左移动效果
		animator2.setDuration(1000);
		animator2.setInterpolator(new DecelerateInterpolator());
		
		AnimatorSet animatorSet = new AnimatorSet();//合起来就是左淡出效果
		animatorSet.play(animator2).before(animator1);
//		animatorSet.start();
		
		final ValueAnimator animator3 = ObjectAnimator.ofFloat(view, "alpha",0,1);//淡入效果
		animator3.setDuration(1000);
		animator3.setInterpolator(new AccelerateInterpolator());
		ValueAnimator animator4 = ObjectAnimator.ofFloat(view,"x",view.getX()+2*view.getWidth(),view.getX());//从右边向左移动
		animator4.setDuration(1000);
		animator4.setInterpolator(new DecelerateInterpolator());
		
		animator4.addListener(new AnimatorListenerAdapter() {//当动画播放完，我们做什么

			@Override
			public void onAnimationEnd(Animator animation) {//向下移动淡出，然后向上移动淡入
				super.onAnimationEnd(animation);
				final ValueAnimator animatorY = ObjectAnimator.ofFloat(view, "y", view.getY(),view.getY()+view.getHeight());
				animatorY.setDuration(1000);
				final ValueAnimator alphaY = animator1.clone();
				
				ValueAnimator rotate = ObjectAnimator.ofFloat(view,"rotationY",0,90);
				rotate.setDuration(2000);
//				rotate.start();
				
				animatorY.addListener(new AnimatorListenerAdapter() {
					
					@Override
					public void onAnimationEnd(Animator animation) {
						super.onAnimationEnd(animation);
						animatorY.reverse();
						animator3.clone().start();
					}
					
				});
				AnimatorSet set = new AnimatorSet();
				set.play(animatorY).with(alphaY);
				set.start();
			}
			
		});
		
//		animatorSet.play(animator3).after(animator1);//合起来就是左淡出，右淡入效果
//		animatorSet.play(animator3).with(animator4);
//		animatorSet.start();
		
		AnimatorSet animatorSet1 = new AnimatorSet();
		animatorSet1.play(animator3).with(animator4);
		
		AnimatorSet animatorSet2 = new AnimatorSet();
		animatorSet2.play(animator2).with(animator1);
		
		AnimatorSet set = new AnimatorSet();
		set.playSequentially(animatorSet2,animatorSet1);//使用playSequentially方法测试效果
		set.start();
	}

}

在源代码中还有测试类，修改一下mainifest.xml文件，让另外的那个类运行便可以看到效果。