Android 一般动画animation和属性动画animator

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package com.example.animation;   import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.animation.TranslateAnimation; import android.widget.ImageView; import android.widget.Toast;   public class MainActivity extends Activity {       @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);           }           public void click(View view){         Toast.makeText(this, "click", Toast.LENGTH_SHORT).show();     }           public void move(View view ){         float fromXDelta=0;         float toXDelta=0;         float fromYDelta=0;         float toYDelta=200;         TranslateAnimation animation = new TranslateAnimation(fromXDelta, toXDelta, fromYDelta, toYDelta);         /**          * time          */         animation.setDuration(1000);         animation.setFillAfter(true);         ImageView imageView=(ImageView)findViewById(R.id.imageView);         imageView.startAnimation(animation);     }        }

这是一般动画，再看属性动画

区别：一般动画变换后只是图片移动了，view的位置不变，然而属性动画view随着图片移动。

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public void move(View view ){       ImageView imageView=(ImageView)findViewById(R.id.imageView);     ObjectAnimator.ofFloat(imageView, "translationY", 0f,200f).setDuration(1000).start(); }

多种动画同时进行

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public void move(View view ){       ImageView imageView=(ImageView)findViewById(R.id.imageView);     ObjectAnimator.ofFloat(imageView, "translationY", 0f,200f).setDuration(1000).start();     ObjectAnimator.ofFloat(imageView, "translationX", 0f,200f).setDuration(1000).start();     ObjectAnimator.ofFloat(imageView, "rotation", 0,360f).setDuration(1000).start(); }

Google提供了一种更节省系统资源的多种动画同时播放

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public void move(View view ){       ImageView imageView=(ImageView)findViewById(R.id.imageView);       PropertyValuesHolder p1=PropertyValuesHolder.ofFloat("rotation", 0,360f);     PropertyValuesHolder p2=PropertyValuesHolder.ofFloat("translationX", 0f,200f);     PropertyValuesHolder p3=PropertyValuesHolder.ofFloat("translationY", 0f,200f);     ObjectAnimator.ofPropertyValuesHolder(imageView, p1,p2,p3).setDuration(1000).start(); }

同时Google提供了animatorset，允许多种不同动画按照用户要求播放，如使用set.palyTpgether() set.playSequentially()

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public void move(View view ){       ImageView imageView=(ImageView)findViewById(R.id.imageView);         ObjectAnimator animator1=ObjectAnimator.ofFloat(imageView, "rotation", 0,360f);     ObjectAnimator animator2=ObjectAnimator.ofFloat(imageView, "translationX", 0,200f);     ObjectAnimator animator3=ObjectAnimator.ofFloat(imageView, "translationY", 0,200f);       AnimatorSet set=new AnimatorSet();     //set.playTogether(animator1,animator2,animator3);     set.playSequentially(animator1,animator2,animator3);     set.setDuration(1000);     set.start(); }

 

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