属性动画_

public class MainActivity extends AppCompatActivity {    TextView tv;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        tv = (TextView) findViewById(R.id.tv);        //参数1：要执行动画的 控件 对象        //参数2：要实行动画的 样式字符串        //参数3：可变长度的参数  用来确定该控件对象的 改变过程        ObjectAnimator animator = ObjectAnimator.ofFloat(tv, "alpha", 1f, 0f, 1f, 0.5f, 1f);        animator.setDuration(5000);//        animator.start();        float x = tv.getTranslationX();        ObjectAnimator animator1 = ObjectAnimator.ofFloat(tv, "translationX", x , 100, x);        animator1.setDuration(5000);//        animator1.start();        ObjectAnimator animator2 = ObjectAnimator.ofFloat(tv, "scaleY", 1f, 0.5f, 2f, 1f);        animator2.setDuration(5000);        //--------------------------------        ValueAnimator animator3 = ValueAnimator.ofObject(new ArgbEvaluator(), Color.RED, Color.BLUE);        animator3.setDuration(5000);        animator3.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {            @Override            public void onAnimationUpdate(ValueAnimator animation) {                int currentColor = (int) animation.getAnimatedValue();                tv.setTextColor(currentColor);            }        });//        animator3.start();        AnimatorSet set = new AnimatorSet();        set.play(animator).after(animator1).before(animator2).with(animator3);        set.start();        set.addListener(new AnimatorListenerAdapter() {            @Override            public void onAnimationEnd(Animator animation) {                super.onAnimationEnd(animation);            }        });    }}