设置Android的图像从字符串值 [英] Setting Android images from string value

问题描述

目前我画一个PNG图像在我的Andr​​oid应用程序，像这样：

Currently I'm drawing a PNG image in my Android application like so:

ImageView image = new ImageView(context);
image.setImageDrawable(context.getResources().getDrawable(R.drawable.testimage))

如果我有一个数据库映像名称的列表，有没有一种方法来设置上面使用图像的名称绘制？我已经有code要通过数据库，我只是在寻找基于从这里获取的值来绘制图像。

If I have a list of image names in a database, is there a way to set the drawable above using the image name? I already have the code to go through the database, I'm just looking to draw the image based on the value taken from here.

例如，对数据库的记录：

For example, a record for the DB:

ID:    Name:    ImageName:
-      Test     testimage

所以，当我在读这条记录，我有一个字符串testimage的值，然后我想的图像绘制设置为 R.drawable.testimage 。

我在想这样做会是这样的一种方式：

One way I was thinking of doing it would be something like this:

int image = R.drawable.blank; // blank image

// testimage.png is the image name from the database
if(imageName.toString().equals("testimage.png"))
    image = R.drawable.testimage;
else if(imageName.toString().equals("another.png"))
    image = R.drawable.another;
else if(imageName.toString().equals("etc.png"))
    image = R.drawable.etc;

然而，这不是很有效！

However this isn't very efficient!

感谢

推荐答案

有这样做，你可以通过字符串中使用Resources.getIdentifier（）<一retreive资源ID的方法href="http://developer.android.com/reference/android/content/res/Resources.html">http://developer.android.com/reference/android/content/res/Resources.html

There is a method for doing that, you can retreive resource IDs by string using Resources.getIdentifier() http://developer.android.com/reference/android/content/res/Resources.html

是这样的：

int resourceId = Activity.getResources().getIdentifier("testimage", "drawable", "your.package.name");

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