Question

我可以在Android中动态设置图片，但

如何获得5张图片，每次点击按钮都应该更改imageview中的图像。但是5张图片完成了重置旧图片..请帮助我..

OnClick(View v){
if(counter == 0){
    imageView.setImageResource(R.drawable.image1);
}
if(counter == 1){
    imageView.setImageResource(R.drawable.image2);
}
if(counter == 2){
    imageView.setImageResource(R.drawable.image3);
}
if(counter == 3){
    imageView.setImageResource(R.drawable.image4);
}
if(counter == 4){
    imageView.setImageResource(R.drawable.image5);
}
if(counter == 5){
    imageView.setImageResource(R.drawable.image6);
    counter = -1;
}
counter++}

Answer 1

这只是基于我们的逻辑。请自己想一想。

 if(counter == 0){
    imageView.setImageResource(R.drawable.image1);
counter++;
}else if(counter == 1){
    imageView.setImageResource(R.drawable.image2);
counter++;
}else if(counter == 2){
    imageView.setImageResource(R.drawable.image3);
counter++;
}else if(counter == 3){
    imageView.setImageResource(R.drawable.image4);
counter++;
}else if(counter == 4){
    imageView.setImageResource(R.drawable.image5);
counter++;
}else{

    imageView.setImageResource(R.drawable.image6);
    counter=0;
}
}

Answer 2

更优雅的解决方案是将这些可绘制的ID存储在数组中，然后通过索引

进行选择

    int counter = 0;
    Integer[] images =  {R.drawable.image1, R.drawable.image2, R.drawable.image3, R.drawable.image4, R.drawable.image5}
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            imageView.setImageResource(images[counter]);
            if(counter++ >= images.length) counter = 0;
        }
    });

在Android中动态更改图像

2 个答案: