【问题描述1】
鸿蒙怎么实现跳转系统浏览器？浏览百度网页
【解决方案】
参考资料
【Harmony OS】【JAVA UI】abilitySlice和ability跳转方式

【Harmony OS】【ARK UI】ets使用startAbility或startAbilityForResult方式调起Ability

java版本

    Intent intent= new Intent();
         intent.setAction("android.intent.action.VIEW");
         intent.setUri(Uri.parse("https://www.baidu.com/"));
         startAbility(intent);

ets或者js 版本

import featureAbility from '@ohos.ability.featureAbility';
@Entry
@Component
struct Index {
  public onclick(){
    var str = {
      "want": {
        "deviceId": "",
        "bundleName": "",
        "abilityName": "",
        "uri": "https://www.baidu.com/",
        "action":"android.intent.action.VIEW",
      },
      "abilityStartSetting": {}
    };
    featureAbility.startAbility(str)
      .then((data) => {
        console.info('Operation successful. Data: ' + JSON.stringify(data))
      }).catch((error) => {
      console.error('Operation failed. Cause: ' + JSON.stringify(error));
    })
  }

  build() {
    Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
      Text('Hello World')
        .fontSize(50)
        .fontWeight(FontWeight.Bold)
      .onClick(this.onclick.bind(this))
    }
    .width('100%')
    .height('100%')
  }
}

【问题描述2】
鸿蒙怎么实现，调用TextField.getLineCount()获取行数闪退
【解决方案】

参考如下链接

https://developer.harmonyos.com/cn/docs/documentation/doc-references/text-0000001054838676#ZH-CN_TOPIC_0000001054838676__getLineCount--

此api从Api Version 7 开始支持

【问题描述3】
鸿蒙怎么使用getLineCount()
【解决方案】

代码如下

textField.setBindStateChangedListener(new Component.BindStateChangedListener() {
            @Override
            public void onComponentBoundToWindow(Component component) {
                int count1=textField.getLineCount();
                Text mytext=findComponentById(ResourceTable.Id_mytext);
                mytext.setText("#####行数"+count1);
            }

            @Override
            public void onComponentUnboundFromWindow(Component component) {

            }
        });