有时候想在代码运行的时候根据资源名称去获取id从而使用调用资源文件。

Resource中的getIdentifier()可以解决这个问题

    public int getIdentifier(String name, String defType, String defPackage) {return mResourcesImpl.getIdentifier(name, defType, defPackage);}

使用方法：

   int resId = context.getResources().getIdentifier(paramString,"mipmap", context.getPackageName());

除了上面案例中的mipmap可以这样使用之后，以下类型的都可以

• layout
• string
• array
• drawable
• style
• id
• color
• attr
• styleable
• mipmap

封装工具类

public class ResourceUtil {public static int getLayoutId(Context context, String resName) {  return context.getResources().getIdentifier(resName, "layout",  context.getPackageName());  }  public static int getStringId(Context context, String resName) {  return context.getResources().getIdentifier(resName, "string",  context.getPackageName());  }public static int getArrayId(Context context, String resName) {return context.getResources().getIdentifier(resName, "array",context.getPackageName());}public static int getDrawableId(Context context, String resName) {  return context.getResources().getIdentifier(resName,  "drawable", context.getPackageName());  }  public static int getStyleId(Context context, String resName) {  return context.getResources().getIdentifier(resName,  "style", context.getPackageName());  }  public static int getId(Context context, String resName) {  return context.getResources().getIdentifier(resName,  "id", context.getPackageName());  }  public static int getColorId(Context context, String resName) {  return context.getResources().getIdentifier(resName,  "color", context.getPackageName());  }public static int getAttrId(Context context, String resName) {return context.getResources().getIdentifier(resName,"attr", context.getPackageName());}public static int getStyleableId(Context context, String resName) {return context.getResources().getIdentifier(resName,"styleable", context.getPackageName());}public static int getMipmapId(Context context, String resName) {return context.getResources().getIdentifier(resName,"mipmap", context.getPackageName());}
}