示例代码更新为stage模型

Signed-off-by: Nhuyue57 <huyue57@huawei.com>

zh-cn/application-dev/reference/apis/js-apis-audio.md

@@ -73,7 +73,6 @@ createAudioRenderer(options: AudioRendererOptions, callback: AsyncCallback\<Audi
 **示例：**
 
 ```js
-import featureAbility from '@ohos.ability.featureAbility';
 import fs from '@ohos.file.fs';
 import audio from '@ohos.multimedia.audio';
 
@@ -128,7 +127,6 @@ createAudioRenderer(options: AudioRendererOptions): Promise<AudioRenderer\>
 **示例：**
 
 ```js
-import featureAbility from '@ohos.ability.featureAbility';
 import fs from '@ohos.file.fs';
 import audio from '@ohos.multimedia.audio';
 
@@ -5194,18 +5192,11 @@ let bufferSize;
 audioRenderer.getBufferSize().then((data)=> {
   console.info(`AudioFrameworkRenderLog: getBufferSize: SUCCESS ${data}`);
   bufferSize = data;
-  }).catch((err) => {
-  console.error(`AudioFrameworkRenderLog: getBufferSize: ERROR: ${err}`);
-  });
-console.info(`Buffer size: ${bufferSize}`);
-let context = featureAbility.getContext();
-let path;
-async function getCacheDir(){
-  path = await context.getCacheDir();
-}
-let filePath = path + '/StarWars10s-2C-48000-4SW.wav';
-let file = fs.openSync(filePath, fs.OpenMode.READ_ONLY);
-fs.stat(path).then((stat) => {
+  console.info(`Buffer size: ${bufferSize}`);
+  let path = getContext().cacheDir;
+  let filePath = path + '/StarWars10s-2C-48000-4SW.wav';
+  let file = fs.openSync(filePath, fs.OpenMode.READ_ONLY);
+  fs.stat(filePath).then(async (stat) => {
     let buf = new ArrayBuffer(bufferSize);
     let len = stat.size % bufferSize == 0 ? Math.floor(stat.size / bufferSize) : Math.floor(stat.size / bufferSize + 1);
     for (let i = 0;i < len; i++) {
@@ -5224,6 +5215,9 @@ fs.stat(path).then((stat) => {
         })
       })
     }
+  });
+}).catch((err) => {
+  console.error(`AudioFrameworkRenderLog: getBufferSize: ERROR: ${err}`);
 });
 
 
@@ -5250,18 +5244,11 @@ let bufferSize;
 audioRenderer.getBufferSize().then((data) => {
   console.info(`AudioFrameworkRenderLog: getBufferSize: SUCCESS ${data}`);
   bufferSize = data;
-  }).catch((err) => {
-  console.info(`AudioFrameworkRenderLog: getBufferSize: ERROR: ${err}`);
-  });
-console.info(`BufferSize: ${bufferSize}`);
-let context = featureAbility.getContext();
-let path;
-async function getCacheDir(){
-  path = await context.getCacheDir();
-}
-let filePath = path + '/StarWars10s-2C-48000-4SW.wav';
-let file = fs.openSync(filePath, fs.OpenMode.READ_ONLY);
-fs.stat(path).then((stat) => {
+  console.info(`BufferSize: ${bufferSize}`);
+  let path = getContext().cacheDir;
+  let filePath = path + '/StarWars10s-2C-48000-4SW.wav';
+  let file = fs.openSync(filePath, fs.OpenMode.READ_ONLY);
+  fs.stat(filePath).then(async (stat) => {
     let buf = new ArrayBuffer(bufferSize);
     let len = stat.size % bufferSize == 0 ? Math.floor(stat.size / bufferSize) : Math.floor(stat.size / bufferSize + 1);
     for (let i = 0;i < len; i++) {
@@ -5276,6 +5263,9 @@ fs.stat(path).then((stat) => {
           console.error(`audioRenderer.write err: ${err}`);
         }
     }
+  });
+}).catch((err) => {
+  console.info(`AudioFrameworkRenderLog: getBufferSize: ERROR: ${err}`);
 });
 ```