PageAbility开发说明

PageAbility介绍

Page模板（以下简称“Page”）是FA唯一支持的模板，用于提供与用户交互的能力。

PageAbility的生命周期

Ability生命周期介绍（Ability Life Cycle）是Ability被调度到INACTIVE、ACTIVE、BACKGROUND等各个状态的统称（主要涉及PageAbility类型和ServiceAbility类型的Ability）。

• PageAbility类型的Ability生命周期流转如下图所示

Ability生命周期状态说明：

• UNINITIALIZED：未初始状态，为临时状态，Ability被创建后会由UNINITIALIZED状态进入INITIAL状态。

• INITIAL：初始化状态，也表示停止状态，表示当前Ability未运行，Ability被启动后由INITIAL态进入INACTIVE状态。

• INACTIVE：未激活状态，表示当前窗口已显示但是无焦点状态，由于Window暂未支持焦点的概念，当前状态与ACTIVE一致。

• ACTIVE：前台激活状态，表示当前窗口已显示，并获取焦点，Ability在退到后台之前先由ACTIVE状态进入INACTIVE状态。

• BACKGROUND: 后台状态，表示当前Ability退到后台，Ability在被销毁后由BACKGROUND状态进入INITIAL状态，或者重新被激活后由BACKGROUND状态进入ACTIVE状态。

PageAbility类型Ability生命周期回调如下图所示：

启动本地PageAbility

导入模块

import featureAbility from '@ohos.ability.featureAbility'

 FeatureAbility.startAbility(parameter: StartAbilityParameter, callback: AsyncCallback<number>)

• 接口说明

  启动新的ability(callback形式)

• 示例

import featureAbility from '@ohos.ability.featureAbility'
featureAbility.startAbility(
        {
        want:
        {
            action: "",
            entities: [""],
            type: "",
            options: {
                // indicates the grant to perform read operations on the URI
                authReadUriPermission: true,
                // indicates the grant to perform write operations on the URI
                authWriteUriPermission: true,
                // support forward intent result to origin ability
                abilityForwardResult: true,
                // used for marking the ability start-up is triggered by continuation
                abilityContinuation: true,
                // specifies whether a component does not belong to ohos
                notOhosComponent: true,
                // specifies whether an ability is started
                abilityFormEnabled: true,
                // indicates the grant for possible persisting on the URI.
                authPersistableUriPermission: true,
                // indicates the grant for possible persisting on the URI.
                authPrefixUriPermission: true,
                // support distributed scheduling system start up multiple devices
                abilitySliceMultiDevice: true,
                // indicates that an ability using the service template is started regardless of whether the
                // host application has been started.
                startForegroundAbility: true,
                // install the specified ability if it's not installed.
                installOnDemand: true,
                // return result to origin ability slice
                abilitySliceForwardResult: true,
                // install the specified ability with background mode if it's not installed.
                installWithBackgroundMode: true
            },
            deviceId: "",
            bundleName: "com.example.startability",
            abilityName: "com.example.startability.MainAbility",
            uri: ""
        },
    },
  );
)

启动远程PageAbility

导入模块

import featureAbility from '@ohos.ability.featureAbility'

FeatureAbility.startAbility(parameter: StartAbilityParameter)

• 接口说明

  启动远程的ability(promise形式) 前提：通过deviceManager获取远程deviceid

• 示例

        var promise = await ability.startAbility(
            {
                want:
                {
                    deviceId: this.deviceId,
                    bundleName: "com.example.test",
                    abilityName: "com.example.test.MainAbility",
                },
            }
        );