示例演示

动画.gif

一.相关权限配置

权限列表

ohos.permission.DISTRIBUTED_DATASYNC：分布式数据管理权限，允许不同设备间的数据交换
ohos.permission.GET_DISTRIBUTED_DEVICE_INFO：允许获取分布式组网内的设备列表和设备信息

权限声明

在config.json文件中的“reqPermissions”字段中声明所需要的权限

如下：

  "reqPermissions": [
      {
        "name": "ohos.permission.DISTRIBUTED_DATASYNC",
        "reason": "用于分布式设备拉起",
        "usedScene": {
          "ability": [
            ".MainAbility"
          ],
          "when": "inuse"
        }
      },
      {
        "name": "ohos.permission.GET_DISTRIBUTED_DEVICE_INFO"
      }
    ]

向用户申请权限

public class MainAbility extends AceAbility {
    @Override
    public void onStart(Intent intent) {
        //获取分布式设备拉起权限
        String[] permissions = {"ohos.permission.DISTRIBUTED_DATASYNC"};
        requestPermissionsFromUser(permissions, 0);
        super.onStart(intent);
    }

    @Override
    public void onStop() {
        super.onStop();
    }
}

二.编写设备选择dialog

这里参考分布式手写板的dialog样式

<stack class="container">
    <text class="title" onclick="showDeviceList">
        {{ title }}
    </text>
    <dialog id="showDialog" class="select_device_dialog">
        <div class="select_device_wrapper">
            <text class="select_device_title">选择拉起设备</text>
            <list class="select_device_list">
                <list-item class="select_device_item" for="{{ deviceList }}" id="list">
                    <text class="select_device_item_left">{{ $item.deviceName }}
                    </text>
                    <input class="select_device_item_right" type="checkbox" name="Device" value="{{ $idx }}"
                           @change="selectDevice({{ $idx }})" checked="{{ $item.checked }}">
                    </input>
                </list-item>
            </list>
            <div class="choose_ok_or_not">
                <text class="select_device_btn" @click="chooseComform">确定</text>
                <text class="select_device_btn" @click="chooseCancel">取消</text>
            </div>
        </div>
    </dialog>
</stack>

.container {
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
}

.title {
    font-size: 40px;
    color: #000000;
    opacity: 0.9;
}
.operation_bar {
    width: 100%;
    height: 5%;
    flex-direction: row;
    background-color: #ffffff;
}
.share_button {
    width: 30%;
    height: 100%;
    right: 20px;
    object-fit: none;
}
.select_device_dialog {
    width: 70%;
    height: 35%;
}

.select_device_wrapper {
    margin: 5%;
    width: 90%;
    height: 90%;
    flex-direction: column;
}

.select_device_title {
    width: 100%;
    height: 20%;
    text-align: left;
    font-size: 20px;
}

.select_device_list {
    width: 100%;
    height: 60%;
    text-align: left;
    font-size: 15px;
}

.select_device_item {
    width: 100%;
    height: 33%;
}

.select_device_item_left {
    width: 90%;
    height: 100%;
    text-align: left;
    font-size: 16px;
}

.select_device_item_right {
    width: 10%;
    height: 100%;
}

.choose_ok_or_not {
    height: 20%;
    width: 100%;
}

.select_device_btn {
    text-align: center;
    color: #0000ff;
    font-size: 16px;
    width: 100%;
}

三.拉起设备

获取组网内设备列表

调用FeatureAbility.getDeviceList(flag)接口获取设备列表

参数：

flag (默认0：获取网络中所有设备信息列表。)
- 0：获取网络中所有设备信息列表。
- 1：获取网络中在线设备信息列表。
- 2：获取网络中离线设备信息列表。

返回值：

Result
- code
  - 0：成功
  - 非0：失败
- data
  - 失败：携带的错误信息，类型为string
  - 成功：返回网络设备信息列表，类型为Array<DeviceInfo>
DeviceInfo
- networkId:网络ID
- deviceName:设备名称
- deviceState:设备状态：
  - OFFLINE：离线
  - ONLINE：在线
  - UNKNOWN：未知
- deviceType: 设备类型

    // 获取并显示在线设备列表
    async showDeviceList() {
        let ret = await FeatureAbility.getDeviceList(0);
        this.deviceList = new Array();

        if (ret.code === 0) {
            for (let i = 0; i < ret.data.length; i++) {
                this.deviceList[i] = {
                    deviceName: ret.data[i].deviceName,
                    networkId: ret.data[i].networkId,
                    checked: false
                }
            }
        }

        this.$element('showDialog').show();
    },
    // 选择设备
    selectDevice(index, e) {
        this.deviceList[index].checked = e.checked;
    },

拉起在线设备并传递参数

调用FeatureAbility.startAbility(request)

参数：

request
- bundleName
- abilityName
- url：对应拉起的页面路径
- networkId：网络id
- data：传递的数据

async chooseComform() {
        this.$element('showDialog').close();

        for (let i = 0; i < this.deviceList.length; i++) {
            if (this.deviceList[i].checked) {
                //发送给拉起设备同步数据
                let actionData = {
                };

                let target = {
                    bundleName: 'com.example.distrubtedpullingup',
                    abilityName: 'com.example.distrubtedpullingup.MainAbility',
                    url: 'pages/index/index',
                    networkId: this.deviceList[i].networkId,
                    data: actionData
                };

                await FeatureAbility.startAbility(target);
            }
        }
    },

完整js代码

export default {
    data: {
        title: "",
        deviceList: [],
    },
    onInit() {
        this.title = "拉起设备";
    },
    // 获取并显示在线设备列表
    async showDeviceList() {
        let ret = await FeatureAbility.getDeviceList(0);
        this.deviceList = new Array();

        if (ret.code === 0) {
            for (let i = 0; i < ret.data.length; i++) {
                this.deviceList[i] = {
                    deviceName: ret.data[i].deviceName,
                    networkId: ret.data[i].networkId,
                    checked: false
                }
            }
        }

        this.$element('showDialog').show();
    },
    // 选择设备
    selectDevice(index, e) {
        this.deviceList[index].checked = e.checked;
    },

    // 拉起在线设备并传递参数
    async chooseComform() {
        this.$element('showDialog').close();

        for (let i = 0; i < this.deviceList.length; i++) {
            if (this.deviceList[i].checked) {
                //发送给拉起设备同步数据
                let actionData = {
                    //                    title: this.$t('strings.remote'),//改。。。
                    playDistributeDataList: this.playDistributeDataList
                };

                let target = {
                    bundleName: 'com.example.distrubtedpullingup',
                    abilityName: 'com.example.distrubtedpullingup.MainAbility',
                    url: 'pages/index/index',
                    networkId: this.deviceList[i].networkId,
                    data: actionData
                };

                await FeatureAbility.startAbility(target);
            }
        }
    },

    // 取消弹框
    chooseCancel() {
        this.$element('showDialog').close();
    },
}