Android的，在R.drawable参考的东西。使用变量？ [英] Android, reference things in R.drawable. using variables?

问题描述

Greetigns，说我要在R.drawable基于字符串的值动态一些图像文件。有没有办法做到这一点？好像我需要静态是指在研发什么。

Greetigns, say I want to dynamically some image file in R.drawable based on the value of a string. Is there a way to do this? Seems like I need to statically refer to anything in R.

推荐答案

你声明的ID为XML文件中的形象呢？如果你做到了，你可以用下面的方法：

Have you declared the id for the image in XML file? If you did, you can use the following method:

假设你已经picture.png在RES /绘制文件夹。

Let's say you have picture.png in your res/drawable folder.

在你的活动，你可以设置你的图像资源在main.xml中的文件

In your activity, you can set your image resource in the main.xml file

<ImageView android:id="@+id/imageId" android:src="@drawable/picture"></ImageView>

在FirstActivity

In FirstActivity

//to retrieve image using id set in xml.
String imageString = "imageId"
int resID = getResources().getIdentifier(imageString , "id", "package.name");
ImageView image = (ImageView) findViewById(resID);

和imagestring是动态的名称。之后就可以得到动态资源的标识符。

imageString is the dynamic name. After which you can get the identifier of the dynamic resource.

另一种方法，你可以这样做：

Another method, you can do this:

//to retrieve image in res/drawable and set image in ImageView
String imageName = "picture"
int resID = getResources().getIdentifier(imageName, "drawable", "package.name");
ImageView image;
image.setImageResource(resID );

您将能够引用您的图像资源和设置您的ImageView的吧。

You will be able to reference your image resource and set your ImageView to it.

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