Harmony OS页面跳转-JAVA

1.创建一个SecondAbilitySlice.java文件

public class SecondAbilitySlice extends AbilitySlice {
    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        //super.setUIContent(ResourceTable.Layout_ability_second);
        //创建一个布局对象
        DirectionalLayout directionalLayout = new DirectionalLayout(this);
        //创建一个文本对象
        Text t = new Text(this);
        //设置文本内容
        t.setText("Harmony OS");
        //设置文字大小
        t.setTextSize(55);
        //设置文字颜色
        t.setTextColor(Color.BLUE);
        //把文本对象添加得到布局当中
        directionalLayout.addComponent(t);
        //把布局添加到界面中
        super.setUIContent(directionalLayout);

    }

    @Override
    public void onActive() {
        super.onActive();
    }

    @Override
    public void onForeground(Intent intent) {
        super.onForeground(intent);
    }
}

2.ability_main.xml

<DirectionalLayout
    xmlns:ohos="http://schemas.huawei.com/res/ohos"
    ohos:height="match_parent"
    ohos:width="match_parent"
    ohos:alignment="center"
    ohos:background_element="black"
    ohos:orientation="vertical">

    <Text
        ohos:id="$+id:text_helloworld"
        ohos:height="match_content"
        ohos:width="match_content"
        ohos:background_element="blue"
        ohos:layout_alignment="horizontal_center"
        ohos:text="请点击下方按钮"
        ohos:text_size="40vp"
        />
    <Button
        ohos:id="$+id:but"
        ohos:height="match_content"
        ohos:width="match_content"
        ohos:text="按钮"
        ohos:text_size="40vp"
        ohos:text_color="green"
        ohos:margin="40vp"
/>
</DirectionalLayout>

3.MainAbilitySlic

public class MainAbilitySlice extends AbilitySlice implements Component.ClickedListener {
    Button but;
    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setUIContent(ResourceTable.Layout_ability_main);
        //拿取按钮button
        but = (Button)findComponentById(ResourceTable.Id_but);
        //2.给按钮添加一个点击事件
        //理解方式
        //给button添加了一个点击事件
        //当我们再点击鼠标的按键的时候会执行public void onClick(Component component) 这个方法
        but.setClickedListener(this);

    }

    @Override
    public void onActive() {
        super.onActive();
    }

    @Override
    public void onForeground(Intent intent) {
        super.onForeground(intent);
    }

    @Override
    public void onClick(Component component) {
        //点击按钮之后执行的代码
        //跳转到第二个页面中
        if (component == but)//只有点击了button的时候才跳转
        {
            //跳转到那个界面中（在Harmony OS中我们可以用意图）
            Intent t = new Intent();
            //包含了要跳转的页面信息
            Operation operation = new Intent.OperationBuilder()
                    .withDeviceId("")//要跳转到哪个设备上如果传递一个没有内容的字符串表示跳转本机
                    .withBundleName("com.example.helloharmonyos")//我要跳转到哪个应用上
                    .withAbilityName("com.example.helloharmonyos.SecondAbility")//要跳转的页面
                    .build();//表示将上面的三个信息进行打包
            //打包完成后设置一个Operation的对象设置到意图当中
            t.setOperation(operation);
            //跳转页面
            startAbility(t);
        }
    }
}

4.config.json

    ],
        "orientation": "unspecified",
        "visible": true,
        "name": "com.example.helloharmonyos.MainAbility",
        "icon": "$media:icon",
        "description": "$string:mainability_description",
        "label": "$string:entry_MainAbility",
        "type": "page",
        "launchType": "standard"
      },
      {
        "orientation": "unspecified",
        "name": "com.example.helloharmonyos.SecondAbility",
        "icon": "$media:icon",
        "description": "$string:secondability_description",
        "label": "$string:entry_SecondAbility",
        "type": "page",
        "launchType": "standard"
      }
    ]
  }
}

5.效果图