HarmonyOS Developer 基于ArkTS开发常见问题

import router from '@system.router'
export default {
  launch() {
    router.push ({
      uri: 'pages/detail/detail',
    });
  },
}

async jumpJavaAbility() {
    var action = {};
    action.bundleName = 'com.huawei.cookbook';
    action.abilityName = 'com.huawei.myjsapplication.JavaAbility';
    await FeatureAbility.startAbility(action);
}

"smartWindowDeviceType": ["phone", "tablet"]

function onStartRemoteAbility() {
console.info('onStartRemoteAbility begin');
let params;
let wantValue = {
    bundleName: 'ohos.samples.etsDemo',
    abilityName: 'ohos.samples.etsDemo.RemoteAbility',
    deviceId: getRemoteDeviceId(),
    parameters: params
};
console.info('onStartRemoteAbility want=' + JSON.stringify(wantValue));
featureAbility.startAbility({
    want: wantValue
}).then((data) => {
console.info('onStartRemoteAbility finished, ' + JSON.stringify(data));
});
console.info('onStartRemoteAbility end');
}

import Ability from '@ohos.application.Ability';

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

import AbilityStage from '@ohos.application.AbilityStage';

import AbilityStage from '@ohos.app.ability.AbilityStage'

import UIAbility from '@ohos.app.ability.UIAbility'
import common from '@ohos.app.ability.common';
let callbackId;
export default class EntryAbility extends UIAbility {
    onCreate() {
        console.log("onCreate");
        let environmentCallback = {
            onConfigurationUpdated(config){
                console.log("onConfigurationUpdated config:" + JSON.stringify(config));
            },
            onMemoryLevel(level){
                console.log("onMemoryLevel level:" + level);
            }
        }
        // 1. 获取applicationContext
        let applicationContext: common.ApplicationContext = this.context.getApplicationContext();
        // 2. 注册回调函数environmentCallback
        callbackId = applicationContext.registerEnvironmentCallback(environmentCallback);
        console.log("registerEnvironmentCallback number: " + JSON.stringify(callbackId));
    }
    onDestroy() {
        console.log("onDestroy")
        // 1. 获取applicationContext
        let applicationContext: common.ApplicationContext = this.context.getApplicationContext();
        // 2. 注销回调函数environmentCallback
        applicationContext.unregisterEnvironmentCallback(callbackId, (error) => {
            console.log("unregisterEnvironmentCallback success, err: " + JSON.stringify(error));
        });
    }
    // ...
};

import UIAbility from '@ohos.app.ability.UIAbility'
import common from '@ohos.app.ability.common';
let callbackId;
export default class EntryAbility extends UIAbility {
    onCreate() {
        console.log("onCreate")
        let environmentCallback = {
            onConfigurationUpdated(config) {
                console.log("onConfigurationUpdated config:" + JSON.stringify(config));
            },
            onMemoryLevel(level) {
                console.log("onMemoryLevel level:" + level);
            }
        }
        // 1. 获取applicationContext
        let applicationContext: common.ApplicationContext = this.context.getApplicationContext();
// 2. 注册回调函数environmentCallback
        callbackId = applicationContext.on("environment", environmentCallback);
        console.log("registerEnvironmentCallback number: " + JSON.stringify(callbackId));
    }
    onDestroy() {
        console.log("onDestroy")
        // 1. 获取applicationContext
        let applicationContext: common.ApplicationContext = this.context.getApplicationContext();
        // 2. 注销回调函数environmentCallback
        applicationContext.off("environment", callbackId, (error) => {
            console.log("unregisterEnvironmentCallback success, err: " + JSON.stringify(error));
        });
    }
    // ...
};

import deviceInfo from '@ohos.deviceInfo'
let sdkApiVersion = deviceInfo.sdkApiVersion
console.info('sdkApiVersion: '+sdkApiVersion)

sensor.subscribeHeartRate({
  success: function(ret) {
    console.log('get heartrate value:' + ret.heartRate);
  },
  fail: function(data, code) {
    console.log('subscribe heartrate fail, code: ' + code + ', data: ' + data);
  },
});

import dataStorage from '@ohos.data.storage'
import featureAbility from '@ohos.ability.featureAbility'

context.getFilesDir((err, path) => {
    if (err) {
        console.info("Get the storage failed, path: " + path + '/mystore')
        return;
    }
    console.info('getFilesDir successful. path:' + JSON.stringify(path));
    let promisegetSt = dataStorage.getStorage(path + '/mystore')
    promisegetSt.then((storage) => {
        console.info('getStorage successful. storage:' + JSON.stringify(storage));
        storage.putSync('startup', 'auto')
        storage.flushSync()
    }).catch((err) => {
        console.info('getFilesDir failed. err:' + JSON.stringify(err));
        console.info("Get the storage failed, path: " + path + '/mystore')
    })
});

var context = featureAbility.getContext()
context.getFilesDir((err, path) => {
    if (err) {
        console.info("Get the storage failed, path: " + path + '/mystore')
        return;
    }
    console.info('getFilesDir successful. path:' + JSON.stringify(path));
    let promisegetSt = dataStorage.getStorage(path + '/mystore')
    promisegetSt.then((storage) => {
        console.info('getStorage successful. storage:' + JSON.stringify(storage));
        let value = storage.getSync('startup', 'default')
        console.info('getSync successful. value:' + value);
    }).catch((err) => {
        console.info('getFilesDir failed. err:' + JSON.stringify(err));
        console.info("Get the storage failed, path: " + path + '/mystore')
    })
});