自定义View画圆+属性动画+插值器

最新推荐文章于 2021-05-25 19:21:02 发布

金兑丶

最新推荐文章于 2021-05-25 19:21:02 发布

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本文链接：https://blog.youkuaiyun.com/JinDui_1016/article/details/88312319

博客提及了属性动画，属性动画是信息技术领域中用于实现动画效果的重要技术，可对对象的属性进行动态改变以呈现动画。

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xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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=".DonghuaActivity">

   


<com.example.z2.view.Vieeew
    android:id="@+id/circle"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />


</android.support.constraint.ConstraintLayout>

package com.example.z2.view;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.View;

public class Vieeew extends View {

    private Paint paint;

    private int width;
    private int hight;



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

    public Vieeew(Context context,AttributeSet attrs) {
        super(context, attrs);
        paint = new Paint();
        paint.setColor(Color.RED);
    }

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



    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        canvas.drawCircle(width/2,hight/2,50,paint);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        width = getMeasuredWidth();
        hight = getMeasuredHeight();
    }
}

属性动画

package com.example.z2;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.AnimationSet;
import android.view.animation.RotateAnimation;
import android.view.animation.ScaleAnimation;
import android.view.animation.TranslateAnimation;



import com.example.z2.view.Vieeew;

public class DonghuaActivity extends AppCompatActivity {
    private Vieeew circle;




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

//        handler.sendEmptyMessageDelayed(0,1000);

        circle = (Vieeew) findViewById(R.id.circle);

        ScaleAnimation scaleAni = new ScaleAnimation(0.2f, 3.0f, 0.2f, 3.0f,
                Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
                0.5f);

        //设置动画执行的时间，单位是毫秒
        scaleAni.setDuration(100);

        // 0表示从0度开始,360表示旋转360度
        // Animation.RELATIVE_TO_SELF, 0.5f表示绕着自己的中心点进行动画
        RotateAnimation rotateAni = new RotateAnimation(0, 360,
                Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
                0.5f);

        //淡出
        AlphaAnimation alphaAni = new AlphaAnimation(0.2f, 1);

        //设置动画执行的时间，单位是毫秒
        alphaAni.setDuration(3000);
        alphaAni.setRepeatCount(0);



        //平移
        TranslateAnimation translateAni = new TranslateAnimation(
                Animation.RELATIVE_TO_PARENT, 0, Animation.RELATIVE_TO_PARENT,
                0, Animation.RELATIVE_TO_PARENT, 0,
                Animation.RELATIVE_TO_PARENT, 1);

        //设置动画执行的时间，单位是毫秒
        translateAni.setDuration(3000);

        // 设置动画重复次数
        // -1或者Animation.INFINITE表示无限重复，正数表示重复次数，0表示不重复只播放一次
        translateAni.setRepeatCount(0);

        // 设置动画完成的时间（速度），单位是毫秒，1000是1秒内完成动画
        rotateAni.setDuration(3000);

        // 将淡出动画和平移和缩放动画和旋转动画放到动画插值器
        AnimationSet as = new AnimationSet(false);
        as.addAnimation(scaleAni);
        as.addAnimation(rotateAni);
        as.addAnimation(translateAni);
        as.addAnimation(alphaAni);
        Animation.AnimationListener listener = new Animation.AnimationListener() {
            @Override
            public void onAnimationStart(Animation animation) {

            }

            @Override

                public void onAnimationEnd(Animation animation) {
                    startActivity(new Intent( DonghuaActivity.this,MainActivity.class));

            }

            @Override
            public void onAnimationRepeat(Animation animation) {

            }
        };

        translateAni.setAnimationListener(listener);



        // 启动动画
        circle.startAnimation(as);


    }



    }