属性动画的基本操作

布局代码:

<?xml version="1.0" encoding="utf-8"?>
<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:layout_width="match_parent"
    android:layout_height="match_parent" tools:context="com.example.animation.MainActivity">

   <ImageView
       android:id="@+id/iv"
       android:src="@mipmap/ic_launcher_round"
       android:layout_width="50dp"
       android:layout_height="50dp" />

</LinearLayout>

主页面代码:

public class MainActivity extends AppCompatActivity {

    private ImageView iv;
    //耗时操作
    Handler handler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            if(msg.what==1){
            //设置平移的效果
                ObjectAnimator translationY = ObjectAnimator.ofFloat(iv, "translationY", 0, 300f);
                ObjectAnimator translationX = ObjectAnimator.ofFloat(iv, "translationX", 0, 0f);
                //设置旋转的效果
                ObjectAnimator ra = ObjectAnimator.ofFloat(iv,"rotationY", 0f, 360f);
                AnimatorSet animatorSet = new AnimatorSet();
                //将动画添加
                animatorSet.play(translationY).with(translationX).with(ra);
                animatorSet.setDuration(3000);
                animatorSet.start();
                //动画的监听
                animatorSet.addListener(new Animator.AnimatorListener() {
                //开始
                    @Override
                    public void onAnimationStart(Animator animator) {

                    }
                //结束
                    @Override
                    public void onAnimationEnd(Animator animator) {

                    }

                    @Override
                    public void onAnimationCancel(Animator animator) {

                    }

                    @Override
                    public void onAnimationRepeat(Animator animator) {

                    }
                });
            }
        }
    };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        iv = (ImageView)findViewById(R.id.iv);
        initAnimation();
    }

    private void initAnimation() {
    //发送计时器，两秒后执行
        handler.sendEmptyMessageDelayed(1,2000);
    }
}