如何在 Android 中按名称获取图像资源？ [复制]

Question

我想创建一个国家和国旗选择器。我想设置一个标志的图像，但我想根据其名称选择该图像。基本上，我正在尝试为 Android 创建一个标志和 ISD 代码选择器，以便我可以使用它在电话号码的用户之前添加一个 ISD 代码。

ImageView img1 = (ImageView)findViewById(R.id.imgFlag);
img1.setBackgroundResource(R.drawable.India_91);

适配器中有这样的东西。

// India_91 is an image India_91.png,
// suppose if I have USA_1.png as image then i should be able to use
// string "USA_1" to get the related resource and set it as
// BackgroundResource.

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    long resId = getResourceIdUsingResourceString(arrayOfStrings[position]);
    // I should get the Id of the image
    // resource named as"USA_91"
}

// This is a utility function outside adapter class
long getResourceIdUsingResourceString(string resourceName) {
    // Here I want to add a code which can check for
    // resource name and then get id of it
    // which can then be used by callee function/block
    // to fetch the correct resource and display it
}

Answer 1

您正在寻找的缺失部分是Resources.getIdentifier()。您可以将名称作为字符串传入并获取整数标识符。

Resources | Android Developers

示例

long resId = parent.getResources().getIdentifier(arrayOfStrings[position], "drawable", mApplicationContext.getPackageName());