app/src/main/java/com/geekholt/practiceui/view/lesson5/practice08/Practice08ObjectAnimatorLayout.java

package com.geekholt.practiceui.view.lesson5.practice08;

import android.animation.ObjectAnimator;
import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.Button;
import android.widget.RelativeLayout;

import androidx.interpolator.view.animation.FastOutSlowInInterpolator;

import com.geekholt.practiceui.R;

public class Practice08ObjectAnimatorLayout extends RelativeLayout {
    Practice08ObjectAnimatorView view;
    Button animateBt;

    public Practice08ObjectAnimatorLayout(Context context) {
        super(context);
    }

    public Practice08ObjectAnimatorLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public Practice08ObjectAnimatorLayout(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    protected void onAttachedToWindow() {
        super.onAttachedToWindow();

        view = (Practice08ObjectAnimatorView) findViewById(R.id.objectAnimatorView);
        animateBt = (Button) findViewById(R.id.animateBt);

        animateBt.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO 在这里处理点击事件，用 ObjectAnimator 播放动画
                // 1. 用 ObjectAnimator 创建 Animator 对象
                // 2. 用 start() 执行动画
                // *. 记得在 Practice08ObjectAnimatorView 中为 progress 添加 setter/ getter 方法！
                ObjectAnimator animator = ObjectAnimator.ofFloat(view, "progress", 60f);
                animator.setDuration(1000);
                animator.setInterpolator(new FastOutSlowInInterpolator());
                animator.start();
            }
        });
    }
}