Android 属性动画的简单使用

首先一个小布局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.dash.a14_value_animator.MainActivity">

    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <Button
            android:text="X"
            android:onClick="translate"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content" />

        <Button
            android:text="旋转"
            android:onClick="rotate"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content" />

        <Button
            android:text="透明度"
            android:onClick="alpha"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content" />

        <Button
            android:text="缩放"
            android:onClick="scale"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content" />

        <Button
            android:text="组合"
            android:onClick="zuhe"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content" />

    </LinearLayout>

    <ImageView
        android:layout_gravity="center"
        android:id="@+id/image_view"
        android:src="@mipmap/ic_launcher_round"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

剩下就是做代码操作了

public class MainActivity extends AppCompatActivity {

    private ImageView imageView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        imageView = findViewById(R.id.image_view);

        imageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(MainActivity.this,"点击了",Toast.LENGTH_SHORT).show();
            }
        });

    }

    public void translate(View view) {

        //X...Y...

        // Object target动画设置给的目标对象, String propertyName要改变对象哪个属性值, float...values 可变参数(当做数组来用))
        ObjectAnimator animator = ObjectAnimator.ofFloat(imageView, "Y", 0, 300,400,600,900,1500);
        //设置插值器,,,可以不设置,默认是线性匀速
        animator.setInterpolator(new AccelerateInterpolator());
        //设置时间
        animator.setDuration(5000);
        animator.start();

    }

    public void rotate(View view) {
        //旋转
        ObjectAnimator animator = ObjectAnimator.ofFloat(imageView, "rotationY", 0,360);
        //设置时间
        animator.setDuration(5000);
        animator.start();

    }

    public void alpha(View view) {

         // 透明度
        ObjectAnimator alpha = ObjectAnimator.ofFloat(imageView, "alpha", 0, 1);
        alpha.setDuration(3000);
        alpha.start();

    }

    public void scale(View view) { 
        //  缩放
        ObjectAnimator alpha = ObjectAnimator.ofFloat(imageView, "scaleX", 1, 3);
        alpha.setDuration(3000);
        alpha.start();

    }

    public void zuhe(View view) {

        ObjectAnimator y = ObjectAnimator.ofFloat(imageView, "Y", 0, 500, 800, 1300);

        ObjectAnimator alpha = ObjectAnimator.ofFloat(imageView, "alpha", 0.5f, 1);

        ObjectAnimator rotationX = ObjectAnimator.ofFloat(imageView, "rotationX", 0, 360);
        ObjectAnimator rotationY = ObjectAnimator.ofFloat(imageView, "rotationY", 0, 360);

        ObjectAnimator scaleX = ObjectAnimator.ofFloat(imageView, "scaleX", 0.5f, 2);
        ObjectAnimator scaleY = ObjectAnimator.ofFloat(imageView, "scaleY", 0.5f, 2);

        //组合
        AnimatorSet animatorSet = new AnimatorSet();

        //放到一起
        animatorSet.play(y).with(alpha).with(rotationX).with(rotationY).with(scaleX).with(scaleY);

        animatorSet.setDuration(5000);
        animatorSet.start();

        animatorSet.addListener(new Animator.AnimatorListener() {
            @Override
            public void onAnimationStart(Animator animator) {

            }

            @Override
            public void onAnimationEnd(Animator animator) {
                //动画结束跳转页面


            }

            @Override
            public void onAnimationCancel(Animator animator) {

            }

            @Override
            public void onAnimationRepeat(Animator animator) {

            }
        });
    }
}