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;@Overrideprotected 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);}}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {//getMenuInflater().inflate(R.menu.activity_main, menu);return true;}@Overridepublic 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@Overridepublic 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() {@Overridepublic 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。