import distributedData from '@ohos.data.distributedData';
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    createKvStore(callback) {
        if (typeof (this.kvStore) === 'undefined') {
            //创建KvManagerConfig对象
            var config = {
                bundleName: 'com.example.myapplication',
                userInfo: {
                    userId: '0',
                    userType: 0
                }
            };
            let self = this;
            distributedData.createKVManager(config).then((manager) => {
                //创建分布式数据库管理器
                self.kvManager = manager;
                var options = {
                    createIfMissing: true,
                    encrypt: false,
                    backup: false,
                    autoSync: true,
                    kvStoreType: 1,
                    //等级越高，限制越多
                    securityLevel: 1,
                };
                self.kvManager.getKVStore(STORE_ID, options).then((store) => {
                    self.kvStore = store;
                    callback();
                });
            });
        } else {
            callback();
        }
    }
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sendMessage(key,value) {
        let self = this;
        this.createKvStore(() => {
            self.put(key,value);
        });
    }    
put(key,value) {
        console.info('data is changing...' );
        this.kvStore.put(key,value).then((data) => {
            console.info('dataChange:' + JSON.stringify(data));
            this.kvStore.get(key).then((data) => {
                console.info('dataChange:' + JSON.stringify(data));
            });
        }).catch((err) => {
        });
    }
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    delete(key) {
        this.kvStore.delete(key).then((data) => {
        }).catch((err) => {
        });
    }
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    get(key) {
        this.kvStore.get(key).then((data) => {
        }).catch((err) => {
        });
    }
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    setOnMessageReceivedListener(callback) {
        let self = this;
        this.createKvStore(() => {
            self.kvStore.on('dataChange', 1, (data) => {
                console.info('dataChange:' + JSON.stringify(data));

                for (var i = 0; i < data.updateEntries.length; i++) {
                    var str = data.updateEntries[0].value.value;
                    callback(data.updateEntries[0].key,str, 1);
                    return;
                }

            });
        });
    }
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"reqPermissions": [
      {
        "name": "ohos.permission.DISTRIBUTED_DATASYNC"
      }
    ]
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import featureAbility from '@ohos.ability.featureAbility';
export default {
    onInit() {
        this.grantPermission();
    },
    grantPermission() {
        console.info('Calc[IndexPage] grantPermission')
        let context = featureAbility.getContext()
        context.requestPermissionsFromUser(['ohos.permission.DISTRIBUTED_DATASYNC'], 666, function (res) {
            console.log("chw---get permission result:"+res)
        })
    },
}
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import KvStoreModel from '../../model/kv.js';
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data: {
    kvStoreModel: new KvStoreModel(),
},
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    onInit() {
        console.log("chw---init start")
        this.grantPermission();
        // type表示操作0：插入数据、1：修改数据：2：删除数据
        this.kvStoreModel.setOnMessageReceivedListener((k, v, type1) => {
            console.log("chw---is listening")
            //传过来是的字符串，要解序列化为 JSON对象
            this.testReceiveStr =v;
            this.isReceiveInfo= true;
            this.changeType=type1;
            console.log("chw---receive data:"+v);
        });
        console.log("chw---init end")
    },
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    send(){
        var that=this;
        //这里注意如果发送数据类型是对象或者数组需要将对象或者数组序列化成 JSON字符串
        this.kvStoreModel.sendMessage(that.key,"消息123");
        console.log("chw---is sending")
    },
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import featureAbility from '@ohos.ability.featureAbility';
import KvStoreModel from '../../model/kv.js';
export default {
    data: {
        kvStoreModel: new KvStoreModel(),
        isReceiveInfo:false,
        changeType:1,
        key:"openharmony",
        testReceiveStr:"nothing"
    },
    onInit() {
        console.log("chw---init start")
        this.grantPermission();
        // type表示操作0：插入数据、1：修改数据：2：删除数据
        this.kvStoreModel.setOnMessageReceivedListener((k, v, type1) => {
            console.log("chw---is listening")
            //传过来是的字符串，要解序列化为 JSON对象
            this.testReceiveStr =v;
            this.isReceiveInfo= true;
            this.changeType=type1;
            console.log("chw---receive data:"+v);
        });
        console.log("chw---init end")
    },
    grantPermission() {
        let context = featureAbility.getContext()
        context.requestPermissionsFromUser(['ohos.permission.DISTRIBUTED_DATASYNC'], 666, function (res) {
            //            console.log("chw---get permission result:"+res)
        })
    },
    send(){
        var that=this;
        //这里注意如果发送数据类型是对象或者数组需要将对象或者数组序列化成 JSON字符串
        this.kvStoreModel.sendMessage(that.key,"消息123");
        console.log("chw---is sending")
    },
}

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<div class="container">
    <text class="title" if="{{isReceiveInfo}}">
        接收信息：{{ testReceiveStr }}
    </text>
    <button type="capsule" onclick="send" style="width: 300px;height: 100px;">
        同步数据
    </button>
</div>

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