設(shè)置初次啟動原因、上次退出原因、遷移結(jié)果、窗口類型

導(dǎo)入模塊

import AbilityConstant from '@ohos.app.ability.AbilityConstant';

屬性

AbilityConstant.LaunchParam

啟動參數(shù)。

系統(tǒng)能力：以下各項(xiàng)對應(yīng)的系統(tǒng)能力均為SystemCapability.Ability.AbilityRuntime.Core

AbilityConstant.LaunchReason

Ability初次啟動原因，該類型為枚舉，可配合Ability的onCreate(want, launchParam)方法根據(jù)launchParam.launchReason的不同類型執(zhí)行相應(yīng)操作。

系統(tǒng)能力：以下各項(xiàng)對應(yīng)的系統(tǒng)能力均為SystemCapability.Ability.AbilityRuntime.Core

示例：

import UIAbility from '@ohos.app.ability.UIAbility';

class MyAbility extends UIAbility {
    onCreate(want, launchParam) {
        if (launchParam.launchReason === AbilityConstant.LaunchReason.START_ABILITY) {
            console.log('The ability has been started by the way of startAbility.');
        }
    }
}

AbilityConstant.LastExitReason

Ability上次退出原因，該類型為枚舉，可配合Ability的onCreate(want, launchParam)方法根據(jù)launchParam.lastExitReason的不同類型執(zhí)行相應(yīng)操作。

系統(tǒng)能力：以下各項(xiàng)對應(yīng)的系統(tǒng)能力均為SystemCapability.Ability.AbilityRuntime.Core

示例：

import UIAbility from '@ohos.app.ability.UIAbility';

class MyAbility extends UIAbility {
    onCreate(want, launchParam) {
        if (launchParam.lastExitReason === AbilityConstant.LastExitReason.ABILITY_NOT_RESPONDING) {
            console.log('The ability has exit last because the ability was not responding.');
        }
    }
}

AbilityConstant.OnContinueResult

Ability遷移結(jié)果，該類型為枚舉，可配合Ability的onContinue(wantParam)方法進(jìn)完成相應(yīng)的返回。

系統(tǒng)能力：以下各項(xiàng)對應(yīng)的系統(tǒng)能力均為SystemCapability.Ability.AbilityRuntime.Core

示例：

import UIAbility from '@ohos.app.ability.UIAbility';

class MyAbility extends UIAbility {
    onContinue(wantParam) {
        return AbilityConstant.OnContinueResult.AGREE;
    }
}

AbilityConstant.MemoryLevel

內(nèi)存級別，該類型為枚舉，可配合Ability的onMemoryLevel(level)方法根據(jù)level執(zhí)行不同內(nèi)存級別的相應(yīng)操作。

系統(tǒng)能力：以下各項(xiàng)對應(yīng)的系統(tǒng)能力均為SystemCapability.Ability.AbilityRuntime.Core

示例：

import UIAbility from '@ohos.app.ability.UIAbility';

class MyAbility extends UIAbility {
    onMemoryLevel(level) {
        if (level === AbilityConstant.MemoryLevel.MEMORY_LEVEL_CRITICAL) {
            console.log('The memory of device is critical, please release some memory.');
        }
    }
}

AbilityConstant.OnSaveResult

保存應(yīng)用數(shù)據(jù)的結(jié)果，該類型為枚舉，可配合Ability的onSaveState(reason, wantParam)方法完成相應(yīng)的返回。

系統(tǒng)能力：以下各項(xiàng)對應(yīng)的系統(tǒng)能力均為SystemCapability.Ability.AbilityRuntime.Core

示例：

import UIAbility from '@ohos.app.ability.UIAbility';

class MyAbility extends UIAbility {
    onSaveState(reason, wantParam) {
        return AbilityConstant.OnSaveResult.ALL_AGREE;
    }
}

AbilityConstant.StateType

保存應(yīng)用數(shù)據(jù)場景原因，該類型為枚舉，可配合Ability的onSaveState(reason, wantParam)方法根據(jù)reason的不同類型執(zhí)行相應(yīng)操作。

系統(tǒng)能力：以下各項(xiàng)對應(yīng)的系統(tǒng)能力均為SystemCapability.Ability.AbilityRuntime.Core

示例：

import UIAbility from '@ohos.app.ability.UIAbility';

class MyAbility extends UIAbility {
    onSaveState(reason, wantParam) {
        if (reason === AbilityConstant.StateType.CONTINUATION) {
            console.log('Save the ability data when the ability continuation.');
        } 
        return AbilityConstant.OnSaveResult.ALL_AGREE;
    }
}