Canvas中深色/浅色主题切换

import { BusinessError } from '@ohos.base';  
  
try {  
  this.context.resourceManager.getColorSync($r('app.color.test').id);  
} catch (error) {  
  let code = (error as BusinessError).code;  
  let message = (error as BusinessError).message;  
  console.error(`getColorSync failed, error code: ${code}, message: ${message}.`);  
}
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