增加Res 类

common_ui/src/main/ets/utils/Res.ets

@@ -0,0 +1,18 @@
+import { util } from '@kit.ArkTS';
+
+export class Res {
+
+  static getRawFileContent(name: string): string {
+    let content = getContext().resourceManager.getRawFileContentSync(name);
+    let textDecoderOptions: util.TextDecoderOptions = {
+      fatal: false,
+      ignoreBOM : true
+    }
+    let decodeWithStreamOptions: util.DecodeWithStreamOptions = {
+      stream: true
+    }
+    let textDecoder = util.TextDecoder.create('utf-8', textDecoderOptions);
+    let retStr = textDecoder.decodeWithStream( content , decodeWithStreamOptions);
+    return retStr;
+  }
+}