!13127 【元能力】低内存监听回调资料新增

Merge pull request !13127 from dy/master

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

 # @ohos.application.EnvironmentCallback (EnvironmentCallback)
 
-EnvironmentCallback模块提供应用上下文ApplicationContext对系统环境变化监听回调的能力，包括onConfigurationUpdated方法。
+EnvironmentCallback模块提供应用上下文ApplicationContext对系统环境变化监听回调的能力，包括onConfigurationUpdated、onMemoryLevel方法。
 
 > **说明：**
 > 
@@ -29,8 +29,21 @@ onConfigurationUpdated(config: Configuration): void;
   | -------- | -------- | -------- | -------- |
   | config | [Configuration](js-apis-application-configuration.md) | 是 | 变化后的Configuration对象。 |
 
+## EnvironmentCallback.onMemoryLevel
+
+onMemoryLevel(level: number): void;
+
+注册系统内存基线水平变化监听后，在系统内存基线水平变化时触发回调。
+
+**系统能力**：SystemCapability.Ability.AbilityRuntime.AbilityCore
+
+**参数：**
+
+  | 参数名 | 类型 | 必填 | 说明 |
+  | -------- | -------- | -------- | -------- |
+  | level  | [MemoryLevel](js-apis-application-abilityConstant.md#abilityconstantmemorylevel) | 是 | 表示当前内存的基线水平。 |
+
 **示例：**
-    
 
   ```ts
 import Ability from "@ohos.application.Ability";
@@ -45,6 +58,9 @@ export default class MyAbility extends Ability {
             onConfigurationUpdated(config){
                 console.log("onConfigurationUpdated config:" + JSON.stringify(config));
             },
+            onMemoryLevel(level){
+                console.log("onMemoryLevel level:" + level);
+            }
         }
         // 1.获取applicationContext
         let applicationContext = globalThis.applicationContext;

zh-cn/application-dev/reference/apis/js-apis-inner-ability-dataAbilityResult.md

@@ -19,56 +19,59 @@
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
 
-let dataAbilityUri = ("dataability:///com.example.myapplication.TestDataAbility");
-let DAHelper;
-try {
-    DAHelper = featureAbility.acquireDataAbilityHelper(dataAbilityUri);
-    if (DAHelper == null) {
-        console.error('DAHelper is null');
+// 批量执行数据库操作
+function executeBatchOperation() {
+    let dataAbilityUri = ("dataability:///com.example.myapplication.TestDataAbility");
+    let DAHelper;
+    try {
+        DAHelper = featureAbility.acquireDataAbilityHelper(dataAbilityUri);
+        if (DAHelper == null) {
+            console.error('DAHelper is null');
+            return;
+        }
+    } catch (err) {
+        console.error('acquireDataAbilityHelper fail, error:' + JSON.stringify(err));
         return;
     }
-} catch (err) {
-    console.error('acquireDataAbilityHelper fail, error:' + JSON.stringify(err));
-    return;
-}
 
-let valueBucket = {
-    "name": "DataAbilityHelperTest",
-    "age": 24,
-    "salary": 2024.20,
-};
-let operations = [
-{
-    uri: dataAbilityUri,
-    type: featureAbility.DataAbilityOperationType.TYPE_INSERT,
-    valuesBucket: valueBucket,
-    predicates: null,
-    expectedCount: 1,
-    PredicatesBackReferences: {},
-    interrupted: true,
-},
-{
-    uri: dataAbilityUri,
-    type: featureAbility.DataAbilityOperationType.TYPE_INSERT,
-    valuesBucket: valueBucket,
-    predicates: null,
-    expectedCount: 1,
-    PredicatesBackReferences: {},
-    interrupted: true,
-}
-];
+    let valueBucket = {
+        "name": "DataAbilityHelperTest",
+        "age": 24,
+        "salary": 2024.20,
+    };
+    let operations = [
+    {
+        uri: dataAbilityUri,
+        type: featureAbility.DataAbilityOperationType.TYPE_INSERT,
+        valuesBucket: valueBucket,
+        predicates: null,
+        expectedCount: 1,
+        PredicatesBackReferences: {},
+        interrupted: true,
+    },
+    {
+        uri: dataAbilityUri,
+        type: featureAbility.DataAbilityOperationType.TYPE_INSERT,
+        valuesBucket: valueBucket,
+        predicates: null,
+        expectedCount: 1,
+        PredicatesBackReferences: {},
+        interrupted: true,
+    }
+    ];
 
-try {
-    DAHelper.executeBatch(dataAbilityUri, operations).then((data) => {
-        for (let i = 0; i < data.length; i++) {
-            let dataAbilityResult = data[i];
-            console.log('dataAbilityResult.uri: ' + dataAbilityResult.uri);
-            console.log('dataAbilityResult.count: ' + dataAbilityResult.count);
-        }
-    }).catch(err => {
+    try {
+        DAHelper.executeBatch(dataAbilityUri, operations).then((data) => {
+            for (let i = 0; i < data.length; i++) {
+                let dataAbilityResult = data[i];
+                console.log('dataAbilityResult.uri: ' + dataAbilityResult.uri);
+                console.log('dataAbilityResult.count: ' + dataAbilityResult.count);
+            }
+        }).catch(err => {
+            console.error('executeBatch error: ' + JSON.stringify(err));
+        });
+    } catch (err) {
         console.error('executeBatch error: ' + JSON.stringify(err));
-    });
-} catch (err) {
-    console.error('executeBatch error: ' + JSON.stringify(err));
+    }
 }
 ```
\ No newline at end of file

zh-cn/application-dev/reference/apis/js-apis-inner-application-applicationContext.md

@@ -155,6 +155,9 @@ export default class MyAbility extends Ability {
             onConfigurationUpdated(config){
                 console.log("onConfigurationUpdated config:" + JSON.stringify(config));
             },
+            onMemoryLevel(level){
+                console.log("onMemoryLevel level:" + level);
+            }
         }
         // 1.获取applicationContext
         let applicationContext = globalThis.applicationContext;