HarmonyOS 鸿蒙Next 有没有让app回到后台(桌面)的系统方法

如果是想让应用返回桌面，再次打开状态不变，类似页面最小化的这种场景，可以通过minimize完成主窗口的最小化，提供一个demo：

import window from '[@ohos](/user/ohos).window'

import { BusinessError } from '[@ohos](/user/ohos).base';

[@Entry](/user/Entry)

[@Component](/user/Component)

struct Page240605161307072 {

[@State](/user/State) message: string = 'Hello World';

onBackPress() {

const context = getContext(this)

window.getLastWindow(getContext()).then((data) => {

//获取窗口对象

let windowClass = data;

windowClass.minimize((err: BusinessError) => {

const errCode: number = err.code;

if (errCode) {

console.error('Failed to minimize the window. Cause: ' + JSON.stringify(err));

return;

}

console.info('Succeeded in minimizing the window.');

});

console.info('Succeeded in obtaining the top window. Data: ' + JSON.stringify(data));

});

return true;

}

build() {

Row() {

Column() {

Text(this.message)

.fontSize(50)

.fontWeight(FontWeight.Bold)

TextInput()

}

.width('100%')

}

.height('100%')

}

}