# KeepAlive

**Repository Path**: cmzl_ohos/keep-alive-ohos

## Basic Information

- **Project Name**: KeepAlive
- **Description**: openharmony保活
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 1
- **Created**: 2021-06-21
- **Last Updated**: 2021-08-31

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# OhosKeepAlive

#### 介绍

- 用于被杀死的服务自动重启
- 通过两个app的service相互绑定，监听service连接状态。当其中一个service被系统回收时，另一个service监听到断开消息，试图重启对方app的service；从而防止service被系统回收。

#### 使用说明
1.通过两个app的service相互绑定，监听service连接状态
```
    // 创建连接回调实例
    private IAbilityConnection connection = new IAbilityConnection() {
        // 连接到Service的回调
        @Override
        public void onAbilityConnectDone(ElementName elementName, 
            IRemoteObject iRemoteObject, int resultCode) {
            HiLog.error(TAG, "RemoteService::onAbilityConnectDone");
            mIsBound = true;
            iMyIdlInterface = MyIdlInterfaceStub.asInterface(iRemoteObject);
            try {
                iMyIdlInterface.bindSuccess();
            } catch (RemoteException e) {
                HiLog.error(TAG, "RemoteService::" + e.getMessage());
                HiLog.error(TAG, "RemoteService::" + Arrays.toString(e.getStackTrace()));
            }
        }
        // 断开与Service连接的回调
        @Override
        public void onAbilityDisconnectDone(ElementName elementName, int resultCode) {
            mIsBound = false;
            HiLog.error(TAG, "RemoteService::onAbilityDisconnectDone");
            createTransferAbility();
        }
    };
```
```
    private MyIdlInterfaceStub stub = new MyIdlInterfaceStub("com.wuzy.aidlserver.IMyIdlInterface") {
        @Override
        public void bindSuccess() throws RemoteException {
            HiLog.error(TAG, "RemoteService: bindSuccess");
        }

        @Override
        public void unbind() throws RemoteException {
            getApplicationContext().disconnectAbility(connection);
            HiLog.error(TAG, "RemoteService: disconnectAbility");
        }
    };
```
2.在config.json中配置权限

- 为了使service被其他app访问，记得设置"visible": true
   
- APP AIDLServer
```
      {
        "name": "com.wuzy.aidlserver.RemoteService",
        "icon": "$media:icon",
        "description": "$string:remoteservice_description",
        "type": "service",
        "visible": true,
        "exported": true,
        "enabled": true
      }

```
- APP AIDLClient
```
      {
        "name": "com.wuzy.aidlclient.LocalService",
        "icon": "$media:icon",
        "description": "$string:localservice_description",
        "type": "service",
        "visible": true,
        "exported": true,
        "enabled": true
      }

```
3.去掉TransferAbility启动动画，隐藏TransferAbility页面
```
     startAbility(newIntent);
     setTransitionAnimation(0,0);
```
```
      {
        "orientation": "unspecified",
        "name": "com.wuzy.aidlclient.TransferAbility",
        "icon": "$media:icon",
        "description": "$string:transferability_description",
        "label": "$string:app_name",
        "type": "page",
        "launchType": "standard",
        "skills": [
          {
            "actions": [
              "com.wuzy.aidlclient.TransferAbility.FROM_SELF",
              "com.wuzy.aidlclient.TransferAbility.FROM_OTHER"
            ]
          }
        ],
        "metaData": {
          "customizeData": [
            {
              "name": "hwc-theme",
              "value": "androidhwext:style/Theme.Emui.Translucent.NoTitleBar"
            }
          ]
        }
      }

```
```
    <?xml version="1.0" encoding="utf-8"?>
    <DirectionalLayout
        xmlns:ohos="http://schemas.huawei.com/res/ohos"
        ohos:height="1px"
        ohos:width="1px"
        ohos:orientation="vertical">
    </DirectionalLayout>
```