open coding. blinking animation/ fading animation

 

-blinking animation 깜빡거리는 애니메이션

-public AlphaAnimation (float fromAlpha, float toAlpha)

-listener

-Animation Android Developer 사이트 참고

 

package com.www.fadeanimation;

import androidx.appcompat.app.AppCompatActivity;
import androidx.cardview.widget.CardView;

import android.graphics.Color;
import android.os.Bundle;
import android.view.VerifiedInputEvent;
import android.view.View;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;

public class MainActivity extends AppCompatActivity {
                //fade animation : visible -> invisible로 설정


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


    }

    public void btnMethod(View view){
        fadeView();
    }

    private void fadeView(){
        AlphaAnimation alphaAnimation = new AlphaAnimation(1.0f,0.0f);  //visible -> invisible

        alphaAnimation.setDuration(350);    //milliseoconds
        alphaAnimation.setRepeatCount(1);
        alphaAnimation.setRepeatMode(Animation.REVERSE);

        final CardView cardView = findViewById(R.id.cardView);

        cardView.startAnimation(alphaAnimation); //set말고 start!!!해야 실행되더라.

        //listener 색깔변경
        alphaAnimation.setAnimationListener(new Animation.AnimationListener() {
            @Override
            public void onAnimationStart(Animation animation) {
                cardView.setCardBackgroundColor(Color.GREEN);   //시작 칼라
            }

            @Override
            public void onAnimationEnd(Animation animation) {
                cardView.setCardBackgroundColor(Color.WHITE);       //끝나는 칼라
            }

            @Override
            public void onAnimationRepeat(Animation animation) {

            }
        });
    }//finish
}