OpenHarmony如何调用电话服务API拨打电话

// import需要的模块
import call from '@ohos.telephony.call';
import observer from '@ohos.telephony.observer';

// 调用查询能力接口
let isSupport = call.hasVoiceCapability();
if (!isSupport) {
    console.log("not support voice capability, return.");
    return;
}

// 如果设备支持呼叫能力，则继续跳转到拨号界面，并显示拨号的号码
call.makeCall("13xxxx", (err)=> {
    if (!err) {
        console.log("make call success.");
    } else {
        console.log("make call fail, err is:" + JSON.stringify(err));
    }
});

// 订阅通话业务状态变化（可选）
observer.on("callStateChange", (data) => {
    console.log("call state change, data is:" + JSON.stringify(data));
});

// 取消订阅通话业务状态变
observer.off("callStateChange", (data) => {
    console.log("call state change, data is:" + JSON.stringify(data));
});

/*
 * Copyright (c) 2022 JianGuo Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/**     
  * @ProjectName : nutsStudy
  * @FileName :  call
  * @Description : 文件描述 
 */
// import需要的模块
import call from '@ohos.telephony.call';
import observer from '@ohos.telephony.observer';
@Entry
@Component
struct CAllTest{
  build(){
    Column(){
      Button("打电话").width(200).height(80) .fontSize(30).fontColor(Color.Orange).onClick(()=>{
        // 调用查询能力接口
        let isSupport = call.hasVoiceCapability();
        if (!isSupport) {
          console.info(" support voice capability, return");
          return;
        }
        // 如果设备支持呼叫能力，则继续跳转到拨号界面，并显示拨号的号码
        call.makeCall("17752170152", (err)=> {
          if (!err) {
            console.info(" make call success.");
          } else {
            console.info("make call fail, err is:" + JSON.stringify(err));
          }
        });
      })
    }.width("100%").height("100%").justifyContent(FlexAlign.Center)
}
}