OpenHarmony 4.0 Release 循环拉起应用功能

Oracle · 发表于 2025-3-30 16:58:53

需求场景：有部分应用在异常退出时希望重新被启动，无需用户手动操作。

需求分析：

我们还是可以使用在某个常驻服务来实现拉起操作，还是走launcher创建窗口时来实现。此时我们需要去监听某个应用被杀死的状态，刚好 appManager.on(‘applicationState’, applicationStateObserver)这个接口实现了监听应用的状态，并在onProcessDied中可以查询到指定应用的bundleName列表，依赖来实现再次拉起指定应用的场景。
代码示例：

//新增需求，xxx应用被杀掉后需要再此被拉起
let applicationStateObserver: appManager.ApplicationStateObserver = {
onForegroundApplicationChanged(appStateData) {
console.log(`[appManager] onForegroundApplicationChanged: ${JSON.stringify(appStateData)}`);
},
onAbilityStateChanged(abilityStateData) {
console.log(`[appManager] onAbilityStateChanged: ${JSON.stringify(abilityStateData)}`);
},
onProcessCreated(processData) {
console.log(`[appManager] onProcessCreated: ${JSON.stringify(processData)}`);
},
onProcessDied(processData) {
console.log(`[appManager] onProcessDied: ${JSON.stringify(processData)}`);
if(processData.bundleName === 'com.xx.xxx'){
if (systemparameter.getSync('persist.autostart.xxx', '0') === '1') {
setTimeout(() => {
let want = {
"deviceId": "",
"bundleName": "com.xx.xxx",
"abilityName": "EntryAbility"
};
globalThis.desktopContext.startAbility(want).then(() => {
Log.showInfo(TAG, '[appManager] OneFan processData startAbility success');
}).catch((error) => {
Log.showInfo(TAG, '[appManager] OneFan processData startAbility failed');
})
}, 500)
} else {
Log.showInfo(TAG, '[appManager] OneFan processData persist.autostart.dts err');
}
}
},
onProcessStateChanged(processData) {
console.log(`[appManager] onProcessStateChanged: ${JSON.stringify(processData)}`);
}
};
try {
const observerId = appManager.on('applicationState', applicationStateObserver);
console.log(`[appManager] observerCode: ${observerId}`);
} catch (paramError) {
let code = (paramError as BusinessError).code;
let message = (paramError as BusinessError).message;
console.error(`[appManager] error: ${code}, ${message} `);
}
//新增需求，xxx应用被杀掉后需要再此被拉起

复制代码

而相对于服务型应用来说，我们只需要在install_list_capability.json及签名中配置keepAlive为true即可。

2z0y0z0 · 发表于 2025-3-30 16:59:12

学会了学会了谢谢🙏

Gregoryoxymn · 发表于 2025-8-7 02:29:19

Gregoryoxymn · 发表于 2025-8-9 01:59:28

http://tuchkas.ru/