这是我所看到的Andr​​oid应用程序。他们有一些图像按钮与IDS

This what I have seen in an android application. They have a number of image buttons with ids

R.java :
        public static final int img1=0x7f090080;
        public static final int img2=0x7f090081;
        public static final int img3=0x7f090082;
        public static final int img4=0x7f090083;
        public static final int img5=0x7f090084;
        public static final int img6=0x7f090085;
        public static final int img7=0x7f090086;
        public static final int img8=0x7f090087;

在活动中的一个，他们正在穿越一个for循环如下图所示：

In one of the activity they are traversing a for loop like below:

for (int i = 0; i < NoOfButtons; i++) {
    if (i == pos) {
        ((ImageView) vi.findViewById(R.id.img1 + i)).setImageResource(R.drawable.circular_pagination_red);
    } else {
        ((ImageView) vi.findViewById(R.id.img1 + i)).setImageResource(R.drawable.circular_pagination_brown);
}

我想知道它是多么安全和适宜的。 有一件事，这是工作的精绝。我是其中的一部分，从个月，从来没有见过一个问题，在这样的逻辑。但它仍然惹恼了我一下。

I want to know how much safe and advisable it is. One thing this is working absolutely fine. I been a part of this from months and never seen a problem in this logic. But still it irks me a bit.

注：我没有收到任何错误，我知道了替代的解决方案也。我唯一​​担心的是，如果这是不可取/安全，我想知道为什么吗？另一种是场景，它可以为我制造混乱。我对R.java一个很好的了解。

Note : I am not getting any error and I know the alternate solution also. My only concern is if it is not advisable/safe I want to know why? Another is scenarios where it can create havoc for me. I have a good understanding about R.java.

推荐答案

您可能需要使用反射

添加这个方法到code：

Add this method to your code:

protected final static int getResourceID
(final String resName, final String resType, final Context ctx)
{
    final int ResourceID =
        ctx.getResources().getIdentifier(resName, resType,
            ctx.getApplicationInfo().packageName);
    if (ResourceID == 0)
    {
        throw new IllegalArgumentException
        (
            "No resource string found with name " + resName
        );
    }
    else
    {
        return ResourceID;
    }
}

和使用这样的：

int myID =
    getResourceID("your_resource_name", "drawable", getApplicationContext());

注：没有路径（没有扩展名，如遇图像）

Note: no path (and no extension, in case of images).