如何在 Android 中按名称获取图像资源? [英] How can I get an image resource by its name in Android?

问题描述

我想创建一个国家/地区和国旗选择器.我想设置标志的图像，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 ISD 代码.

I want create a country and flag picker. I want to set an image of a flag, but I want to choose that image based on its name. Basically, I am trying to create a flag and ISD code picker for Android, so that I can use it for adding an ISD code before the phone number's user.

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

适配器中的类似内容.

// 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
}

推荐答案

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.

The missing piece you are looking for is Resources.getIdentifier(). You can pass in the name as a String and get the integer identifier.

资源 |Android 开发者

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

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