android动画案例，淡入淡出效果

转载请注明出处&＃xff1a;http://blog.csdn.net/droyon/article/details/8689249

源代码下载

1、android动画测试程序&＃xff0c;界面如图&＃xff1a;

颜色随机变化&＃xff0c;点击视图&＃xff0c;左淡出&＃xff0c;右淡入&＃xff0c;下淡出&＃xff0c;上淡入效果。

主要源代码解析&＃xff1a;

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;&＃64;TargetApi(Build.VERSION_CODES.HONEYCOMB)
public class MainActivity extends Activity implements View.OnClickListener{private TextView[] tv;&＃64;Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.objectanimatortest);tv &＃61; 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 &＃61; Color.rgb((new Random()).nextInt(255), (new Random()).nextInt(255), (new Random()).nextInt(255)) ;int color2 &＃61; Color.rgb((new Random()).nextInt(255), (new Random()).nextInt(255), (new Random()).nextInt(255)) ;ValueAnimator animator &＃61; ObjectAnimator.ofInt(textView, "backgroundColor", color1,color2);animator.setDuration(3000);animator.setEvaluator(new ArgbEvaluator());//设置数值计算器&＃xff0c;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);}}&＃64;Overridepublic boolean onCreateOptionsMenu(Menu menu) {//getMenuInflater().inflate(R.menu.activity_main, menu);return true;}&＃64;Overridepublic void onClick(final View view) {final ValueAnimator animator1 &＃61; ObjectAnimator.ofFloat(view, "alpha",1,0);//淡出效果animator1.setDuration(1000);animator1.setInterpolator(new AccelerateInterpolator());ValueAnimator animator2 &＃61; 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 &＃61; new AnimatorSet();//合起来就是左淡出效果animatorSet.play(animator2).before(animator1);
// animatorSet.start();final ValueAnimator animator3 &＃61; ObjectAnimator.ofFloat(view, "alpha",0,1);//淡入效果animator3.setDuration(1000);animator3.setInterpolator(new AccelerateInterpolator());ValueAnimator animator4 &＃61; ObjectAnimator.ofFloat(view,"x",view.getX()&＃43;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&＃xff0c;我们做什么&＃64;Overridepublic void onAnimationEnd(Animator animation) {//向下移动淡出&＃xff0c;然后向上移动淡入super.onAnimationEnd(animation);final ValueAnimator animatorY &＃61; ObjectAnimator.ofFloat(view, "y", view.getY(),view.getY()&＃43;view.getHeight());animatorY.setDuration(1000);final ValueAnimator alphaY &＃61; animator1.clone();ValueAnimator rotate &＃61; ObjectAnimator.ofFloat(view,"rotationY",0,90);rotate.setDuration(2000);
// rotate.start();animatorY.addListener(new AnimatorListenerAdapter() {&＃64;Overridepublic void onAnimationEnd(Animator animation) {super.onAnimationEnd(animation);animatorY.reverse();animator3.clone().start();}});AnimatorSet set &＃61; new AnimatorSet();set.play(animatorY).with(alphaY);set.start();}});// animatorSet.play(animator3).after(animator1);//合起来就是左淡出&＃xff0c;右淡入效果
// animatorSet.play(animator3).with(animator4);
// animatorSet.start();AnimatorSet animatorSet1 &＃61; new AnimatorSet();animatorSet1.play(animator3).with(animator4);AnimatorSet animatorSet2 &＃61; new AnimatorSet();animatorSet2.play(animator2).with(animator1);AnimatorSet set &＃61; 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&＃xff0c;修改一下mainifest.xml文件&＃xff0c;让另外的那个类运行便可以看到效果。