“findViewById” with for loop [duplicate]

问题

This question already has answers here:

Accessing contents of R.string using a variable to represent the resource name (4 answers)

Android: Using findViewById() with a string / in a loop (7 answers)

Closed 4 years ago.

it's my code:

ImageView img1 = (ImageView) findViewById(R.id.img1);
ImageView img2 = (ImageView) findViewById(R.id.img2);
ImageView img3 = (ImageView) findViewById(R.id.img3);
ImageView img4 = (ImageView) findViewById(R.id.img4);
ImageView img5 = (ImageView) findViewById(R.id.img5);
ImageView img6 = (ImageView) findViewById(R.id.img6);
ImageView img7 = (ImageView) findViewById(R.id.img7);
ImageView img8 = (ImageView) findViewById(R.id.img8);
ImageView img9 = (ImageView) findViewById(R.id.img9);

I d like to create something like this:

     for (int i=1; i<=9; i++) { 
ImageView img+i = (ImageView) findViewById(R.id.img+i);}

How can I do that?

回答1:

Do It like this. You can get drawable names from array stored in xml or code.

for (int i=1; i<=9; i++) { 

int id = getResources().getIdentifier("drawableName", "drawable", context.getPackageName());

ImageView img = (ImageView) findViewById(id);
}

Here "drawableName" is the name of your image and leave "drawable" as is.

回答2:

You cannot do this in the loop. Basically R.id.img is a integer and if you do R.id.img + i, it will result in some random integer.

来源：https://stackoverflow.com/questions/29560173/findviewbyid-with-for-loop