循环浏览 ImageView 的位图

Question

通过 python 中的 Flask，我已将多个图像发送到我的 Android 应用程序并将它们存储到位图的 ArrayList

如何在无限循环的动画中以淡入淡出的方式自动循环 out/fade？

Answer 1

是的，你可以按照下面的方式做：（这里，为了演示，我使用了一个可绘制的数组。你可以使用你的位图数组代替这个，或者用这个来演示。）

public class Main3Activity extends AppCompatActivity {


private ImageView imageView;
private int imageArray[] = { R.drawable.ic_launcher_background, R.drawable.ic_launcher_background,R.drawable.ic_launcher_background };

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main3);

    imageView = (ImageView) findViewById(R.id.imageView);

    startAnimation();
}

private void startAnimation() {


    int fadeInDuration = 500;
    int timeBetween = 3000;
    int fadeOutDuration = 1000;


    int random = new Random().nextInt((imageArray.length - 1) + 1);

    imageView.setVisibility(View.INVISIBLE);
    imageView.setImageResource(imageArray[random]);

    Animation fadeIn = new AlphaAnimation(0, 1);
    fadeIn.setInterpolator(new DecelerateInterpolator());
    fadeIn.setDuration(fadeInDuration);

    Animation fadeOut = new AlphaAnimation(1, 0);
    fadeOut.setInterpolator(new AccelerateInterpolator());
    fadeOut.setStartOffset(fadeInDuration + timeBetween);
    fadeOut.setDuration(fadeOutDuration);

    AnimationSet animation = new AnimationSet(false);
    animation.addAnimation(fadeIn);
    animation.addAnimation(fadeOut);
    animation.setRepeatCount(1);
    imageView.setAnimation(animation);

    animation.setAnimationListener(new Animation.AnimationListener() {
        public void onAnimationEnd(Animation animation) {
            startAnimation();
        }

        public void onAnimationRepeat(Animation animation) {
        }

        public void onAnimationStart(Animation animation) {
        }
    });

}
}

循环浏览 ImageView 的位图

Cycling through bitmaps for ImageView

android

imageview