属性

package com.example.valueanimation;

import androidx.appcompat.app.AppCompatActivity;

import android.animation.Animator;
import android.animation.AnimatorInflater;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.animation.ValueAnimator;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.animation.Animation;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    private Button button1;
    private Button button2;
    private Button button3;
    private Button button4;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        /**
         * java写法    对单一对象使用动画
         */
        button1 = findViewById(R.id.button1);
        button2 = findViewById(R.id.button2);
        button3 = findViewById(R.id.button3);
        button4 = findViewById(R.id.button4);
        button3.setOnClickListener(new View.OnClickListener() {
                                       @Override
                                       public void onClick(View v) {
                                           Toast.makeText(MainActivity.this, "ccc", Toast.LENGTH_SHORT).show();
                                       }
                                   }
        );
        /**
         * ObjectAnimator extend ValueAnimator extend Animator
         */
        //将button1从不透明改为透明再 变为不透明
        ObjectAnimator animator1 = ObjectAnimator.ofFloat(button1, "alpha", 1f, 0f, 1f);
         animator1.setDuration(5000);
         animator1.start();
        //将button2旋转360度
        ObjectAnimator animator2 = ObjectAnimator.ofFloat(button2, "rotation", 0.0f, 360.0f);
         animator2.setDuration(3000);
         animator2.start();
        //将button3移动
        ObjectAnimator animator3 = ObjectAnimator.ofFloat(button3, "translationY",
                0, 200);
        animator3.setDuration(3000);
         animator3.start();

        //将Button4缩放
        ObjectAnimator animator4 = ObjectAnimator.ofFloat(button4, "scaleY", 1f, 5f, 2f);
        animator4.setDuration(2000);
         animator4.start();
        /**
         * 组合动画
         *  after(Animator anim)   将现有动画插入到传入的动画之后执行
         *  after(long delay)   将现有动画延迟指定毫秒后执行
         *  before(Animator anim)   将现有动画插入到传入的动画之前执行
         *  with(Animator anim)   将现有动画和传入的动画同时执行
         */
        AnimatorSet animSet = new AnimatorSet();
        animSet.play(animator1).with(animator2).after(animator3);
        animSet.setDuration(5000);
        animSet.start();
        /**
         * 对单一对象进行处理 ValueAnimator 添加监听处理方法
         */
//        ValueAnimator valueAnimator = ValueAnimator.ofFloat(0.0f,360.0f);
//        valueAnimator.setDuration(5000);
//        valueAnimator.setTarget(button1);
//        valueAnimator.setTarget(button2);
//        valueAnimator.start();
//        valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
//            @Override
//            public void onAnimationUpdate(ValueAnimator animation) {
//                button1.setRotationY((Float)animation.getAnimatedValue()); //
//                button2.setRotation((Float)animation.getAnimatedValue());
//            }
//        });


//        final ValueAnimator valueAnimator = ValueAnimator.ofInt(0,100);
//        valueAnimator.setDuration(5000);
//        valueAnimator.setRepeatCount(2);
//        valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
//            @Override
//            public void onAnimationUpdate(ValueAnimator animation) {
//                int value = (int)valueAnimator.getAnimatedValue();
//                textView.setText(value+"");
//            }
//        });
        //valueAnimator.start();

        /**
         * Animator事件监听器
         */
        animator1.addListener(new Animator.AnimatorListener() {
            @Override
            public void onAnimationStart(Animator animation) {
                //开始
                Toast.makeText(MainActivity.this, "动画开始", Toast.LENGTH_SHORT).show();
                button1.setText("kais");
                //Log.d("kasi","开始");
            }

            @Override
            public void onAnimationEnd(Animator animation) {
                //结束
                Toast.makeText(MainActivity.this, "动画结束", Toast.LENGTH_SHORT).show();

            }

            @Override
            public void onAnimationCancel(Animator animation) {
                       //取消
            }

            @Override
            public void onAnimationRepeat(Animator animation) {
                        //重复
            }
        });
        /**
         * xml写法
         */
//        View view =getWindow().getDecorView();
//        Animator animator = AnimatorInflater.loadAnimator(MainActivity.this,R.animator.anim_drawble);
//        animator.setTarget(button1);
//        animator.start();
    }

}