OpenHarmony 4.0 Release 循环拉起应用功能
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(` onForegroundApplicationChanged: ${JSON.stringify(appStateData)}`);
},
onAbilityStateChanged(abilityStateData) {
console.log(` onAbilityStateChanged: ${JSON.stringify(abilityStateData)}`);
},
onProcessCreated(processData) {
console.log(` onProcessCreated: ${JSON.stringify(processData)}`);
},
onProcessDied(processData) {
console.log(` 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, ' OneFan processData startAbility success');
}).catch((error) => {
Log.showInfo(TAG, ' OneFan processData startAbility failed');
})
}, 500)
} else {
Log.showInfo(TAG, ' OneFan processData persist.autostart.dts err');
}
}
},
onProcessStateChanged(processData) {
console.log(` onProcessStateChanged: ${JSON.stringify(processData)}`);
}
};
try {
const observerId = appManager.on('applicationState', applicationStateObserver);
console.log(` observerCode: ${observerId}`);
} catch (paramError) {
let code = (paramError as BusinessError).code;
let message = (paramError as BusinessError).message;
console.error(` error: ${code}, ${message} `);
}
//新增需求，xxx应用被杀掉后需要再此被拉起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。 学会了学会了谢谢🙏
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