字符串值到varaiable [英] String value to a varaiable

问题描述

这是一个关于在Android的Java问题 - 日食
我有一个字符串研究
为了记录在案，我defind他这样的：

this is a question about java on android - eclipse I have a String r for the record, I defind him like that:

String r="pic"+c1;

我想利用它的价值，是至极pic6，并把它作为一个varaiable名称。

I want to take the value of it, wich is "pic6" and use it as a varaiable name.

我该怎么办呢？

推荐答案

如果你想选择一个图像名称为pic6.png从Android应用程序的绘制文件夹，您可以尝试以下code。

If you want to pick an image with name "pic6.png" from the drawable folder of the Android application, you can try the following code.

String r = "pic" + c1;

int resId = getResources().getIdentifier(r, "drawable", getPackageName());
if (resId != 0) {
    imageView.setImageResource(resId);
} else {
    // This is used in case no image resource is found
    imageView.setImageResource(R.drawable.unknown);
}

请参阅：如果您使用其它的部分，那么你需要添加unknown.png形象到Android项目的绘制文件夹

Please see: If you use the else part, then you need to add "unknown.png" image to the drawable folder of the Android project.

希望这有助于。

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