java 来自字符串的 setImageResource
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setImageResource from a string
提问by Badr Hari
I would like to change the imageview src based on my string, I have something like this:
我想根据我的字符串更改 imageview src，我有这样的事情：
ImageView imageView1 = (ImageView)findViewById(R.id.imageView1);
String correctAnswer = "poland";
String whatEver = R.drawable+correctAnswer;
imageView1.setImageResource(whatEver);
Of course it doesnt work. How can I change the image programmatically?
当然是行不通的。如何以编程方式更改图像？
回答by james
public static int getImageId(Context context, String imageName) {
return context.getResources().getIdentifier("drawable/" + imageName, null, context.getPackageName());
}
use:
imageView1.setImageResource(getImageId(this, correctAnswer);
利用：
imageView1.setImageResource(getImageId(this, correctAnswer);
Note: leave off the extension (eg, ".jpg").
注意：去掉扩展名（例如，“.jpg”）。
Example: image is "abcd_36.jpg"
示例：图像是“abcd_36.jpg”
Context c = getApplicationContext();
int id = c.getResources().getIdentifier("drawable/"+"abcd_36", null, c.getPackageName());
((ImageView)v.findViewById(R.id.your_image_on_your_layout)).setImageResource(id);
回答by Noah
I don't know if this is what you had in mind at all, but you could set up a HashMap of image id's (which are ints) and Strings of correct answers.
我不知道这是否是您的想法，但是您可以设置图像 ID（它们是整数）的 HashMap 和正确答案的字符串。
HashMap<String, Integer> images = new HashMap<String, Integer>();
images.put( "poland", Integer.valueOf( R.drawable.poland ) );
images.put( "germany", Integer.valueOf( R.drawable.germany ) );
String correctAnswer = "poland";
imageView1.setImageResource( images.get( correctAnswer ).intValue() );
