属性动画

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SplashActivity

public class SplashActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_splash);        ImageView img = (ImageView) findViewById(R.id.img);        //属性动画        float translationY = img.getTranslationY();        ObjectAnimator translation = ObjectAnimator.ofFloat(img, "translationY", translationY, 500f);        ObjectAnimator alpha = ObjectAnimator.ofFloat(img, "alpha", 0f, 1f);        ObjectAnimator rotation = ObjectAnimator.ofFloat(img, "rotation", 0f, 360f);        ObjectAnimator scaleY = ObjectAnimator.ofFloat(img, "scaleY", 2f, 1f);        AnimatorSet animatorSet = new AnimatorSet();        animatorSet.play(rotation).with(alpha).with(scaleY).with(translation);        //设置时间        animatorSet.setDuration(3000);        //开始        animatorSet.start();        animatorSet.addListener(new Animator.AnimatorListener() {            @Override            public void onAnimationStart(Animator animator) {            }            @Override            public void onAnimationEnd(Animator animator) {                //跳转                Intent intent = new Intent(SplashActivity.this, MainActivity.class);                startActivity(intent);            }            @Override            public void onAnimationCancel(Animator animator) {            }            @Override            public void onAnimationRepeat(Animator animator) {            }        });    }}

xml

    <ImageView        android:id="@+id/img"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_centerHorizontal="true"        android:src="@mipmap/ic_launcher" />

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