HarmonyOS开发56：同一个页面之中不同切片之间的跳转

1、首先写ability_main.xml代码：里面写三个按钮，分别配置一些提示文字

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

    <Button
        ohos:id="$+id:but1"
        ohos:height="match_content"
        ohos:width="match_content"
        ohos:background_element="#21A8FD"
        ohos:layout_alignment="horizontal_center"
        ohos:text="无参无返回的跳转"
        ohos:text_size="40vp"
        />

    <Button
        ohos:id="$+id:but2"
        ohos:height="match_content"
        ohos:width="match_content"
        ohos:background_element="#21A8FD"
        ohos:layout_alignment="horizontal_center"
        ohos:text="有参无返回的跳转"
        ohos:text_size="40vp"
        ohos:top_margin="30vp"
        />

    <Button
        ohos:id="$+id:but3"
        ohos:height="match_content"
        ohos:width="match_content"
        ohos:background_element="#21A8FD"
        ohos:layout_alignment="horizontal_center"
        ohos:text="有参有返回的跳转"
        ohos:text_size="40vp"
        ohos:top_margin="30vp"
        />

DirectionalLayout>

2、新建三个子界面的xml

abilityslice1.xml的代码：其他两个代码类似，只需修改id和text内容

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

    <Text
        ohos:id="$+id:text1"
        ohos:height="match_content"
        ohos:width="match_content"
        ohos:background_element="#21A8FD"
        ohos:layout_alignment="horizontal_center"
        ohos:text="无参无返回的跳转"
        ohos:text_size="40vp"
        />

DirectionalLayout>

3、在slice包中仿照MainAbilitySlice.java新建三个java类

MyAbilitySlice1.java代码：其他两个只需修改ResourceTable.Layout_abilityslice1即可

package com.example.myapplication.slice;

import com.example.myapplication.ResourceTable;
import ohos.aafwk.ability.AbilitySlice;
import ohos.aafwk.content.Intent;

public class MyAbilitySlice1 extends AbilitySlice {
    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setUIContent(ResourceTable.Layout_abilityslice1);
    }

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

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

4、修改MainAbility.java

package com.example.myapplication;

import com.example.myapplication.slice.MainAbilitySlice;
import com.example.myapplication.slice.MyAbilitySlice1;
import com.example.myapplication.slice.MyAbilitySlice2;
import com.example.myapplication.slice.MyAbilitySlice3;
import ohos.aafwk.ability.Ability;
import ohos.aafwk.content.Intent;

public class MainAbility extends Ability {
    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);

        //添加主要的子界面
        super.setMainRoute(MainAbilitySlice.class.getName());

        //添加其他的子界面
        super.addActionRoute("slice1", MyAbilitySlice1.class.getName());
        super.addActionRoute("slice2", MyAbilitySlice2.class.getName());
        super.addActionRoute("slice3", MyAbilitySlice3.class.getName());
    }
}

这里面addActionRoute的第一个参数需要在config.json中添加

"abilities": [
      {
        "skills": [
          {
            "entities": [
              "entity.system.home"
            ],
            "actions": [
              "action.system.home",
              "slice1",
              "slice2",
              "slice3"
            ]
          }
        ],
        "orientation": "unspecified",
        "name": "com.example.myapplication.MainAbility",
        "icon": "$media:icon",
        "description": "$string:mainability_description",
        "label": "$string:entry_MainAbility",
        "type": "page",
        "launchType": "standard"
      }
    ]

5、修改MainAbilitySlice.java

package com.example.myapplication.slice;

import com.example.myapplication.ResourceTable;
import ohos.aafwk.ability.AbilitySlice;
import ohos.aafwk.content.Intent;
import ohos.agp.components.Button;
import ohos.agp.components.Component;
import ohos.agp.window.dialog.ToastDialog;

public class MainAbilitySlice extends AbilitySlice implements Component.ClickedListener {
    Button but1;
    Button but2;
    Button but3;

    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setUIContent(ResourceTable.Layout_ability_main);

        //找到三个按钮
        but1 = (Button) findComponentById(ResourceTable.Id_but1);
        but2 = (Button) findComponentById(ResourceTable.Id_but2);
        but3 = (Button) findComponentById(ResourceTable.Id_but3);

        //给三个按钮绑定事件
        but1.setClickedListener(this);
        but2.setClickedListener(this);
        but3.setClickedListener(this);
    }

    @Override
    public void onClick(Component component) {
        if(component == but1){
            //无参无返回的跳转

            //意图（在跳转的时候想要做的事情）
            //一、确定要跳转到哪个设备中的ability中。（operation）
            //二、在跳转的时候是否需要带上参数。（parameter）

            //如果我们是在同一个ability中跳转，第一个参数可以不写
            //如果跳转的时候需要带上参数，就写第二个参数，不需要则可不写

            //创建意图的对象
            Intent i = new Intent();
            //跳转
            present(new MyAbilitySlice1(),i);

        }else if (component == but2){
            //有参无返回的跳转

            //创建意图的对象
            Intent i = new Intent();
            i.setParam("username","张三");
            i.setParam("password","123456");
            //跳转
            present(new MyAbilitySlice2(),i);
        }else if(component == but3){
            //有参有返回的跳转

            //创建意图的对象
            Intent i = new Intent();
            i.setParam("username","张三");
            i.setParam("password","123456");
            //跳转
            presentForResult(new MyAbilitySlice3(),i,200);
        }
    }

    //参数一：表示请求码
    //参数二：返回的意图对象
    @Override
    protected void onResult(int requestCode, Intent resultIntent) {
        super.onResult(requestCode, resultIntent);
        if(requestCode == 200){
            boolean result = resultIntent.getBooleanParam("result", false);
            //吐司
            ToastDialog td = new ToastDialog(this);
            td.setText(result + "");
            td.show();
        }
    }

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

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

}

同时修改MyAbilitySlice2.java

package com.example.myapplication.slice;

import com.example.myapplication.ResourceTable;
import ohos.aafwk.ability.AbilitySlice;
import ohos.aafwk.content.Intent;
import ohos.agp.components.Component;
import ohos.agp.components.Text;

public class MyAbilitySlice2 extends AbilitySlice {
    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setUIContent(ResourceTable.Layout_abilityslice2);

        //方法的参数intent,就是跳转过来的时候传递的意图
        String username = intent.getStringParam("username");
        String password = intent.getStringParam("password");

        Text text = (Text) findComponentById(ResourceTable.Id_text2);

        text.setText(username + "," + password);
    }

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

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

修改MyAbilitySlice3.java

package com.example.myapplication.slice;

import com.example.myapplication.ResourceTable;
import ohos.aafwk.ability.AbilitySlice;
import ohos.aafwk.content.Intent;
import ohos.agp.components.Component;
import ohos.agp.components.Text;

public class MyAbilitySlice3 extends AbilitySlice {
    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setUIContent(ResourceTable.Layout_abilityslice3);

        Text text = (Text) findComponentById(ResourceTable.Id_text3);

        //获取到跳转时传递的用户名
        String username = intent.getStringParam("username");
        text.setText(username);

        //当点击了文本框时，返回数据
        text.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                //创建意图对象，返回结果
                Intent i = new Intent();
                i.setParam("result",true);

                //返回意图
                setResult(i);
                //关闭当前子界面
                terminate();
            }
        });
    }

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

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

运行效果：