Android中关于属性动画的案例（1）

布局文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <ImageView
        android:id="@+id/spalsh_icon"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:src="@mipmap/ic_launcher" />

</LinearLayout>

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定义一个SplashActivity来进行效果的实现

public class SplashActivity extends Activity {

    private int height;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {        
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_splash);
        ImageView imageView = findViewById(R.id.spalsh_icon);

        //创建一个方法，里面是我们的属性动画
        //获取屏幕的尺寸
        WindowManager wm = (WindowManager) this.getSystemService(Context.WINDOW_SERVICE);
        int width = wm.getDefaultDisplay().getWidth();

        //开始执行动画
        startAnimator(imageView);
    }

    //定义动画
    public void startAnimator(View view) {
        //属性
        //旋转
        ObjectAnimator translationY = ObjectAnimator.ofFloat(view, "translationY", 0, height / 2);

        //透明
        ObjectAnimator alpha = ObjectAnimator.ofFloat(view, "alpha", 0, 1);
        //缩放
        ObjectAnimator scaleX = ObjectAnimator.ofFloat(view, "scaleX", 2, 1);
         //缩放
        ObjectAnimator scaleY = ObjectAnimator.ofFloat(view, "scaleY", 2, 1);
        //旋转
        ObjectAnimator rotation = ObjectAnimator.ofFloat(view, "rotation", 360);
        //创建动画合集
        AnimatorSet animatorSet = new AnimatorSet();

        animatorSet.playTogether(translationY, alpha, scaleX, scaleY, rotation);
        animatorSet.setDuration(3000);
        animatorSet.start();
        //监听
        animatorSet.addListener(new Animator.AnimatorListener() {
            @Override
            public void onAnimationStart(Animator animation) {

            }

            @Override
            public void onAnimationEnd(Animator animation) {
                //动画结束
                Toast.makeText(SplashActivity.this, "跳转", Toast.LENGTH_SHORT).show();
                startActivity(new Intent (SplashActivity.this, MainActivity.class));
                finish();
            }

            @Override
            public void onAnimationCancel(Animator animation) {

            }

            @Override
            public void onAnimationRepeat(Animator animation) {

            }
        });
    }
}
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作者：拉莫帅
来源：CSDN
原文：https://blog.csdn.net/chen_md/article/details/80180838
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