快速入门HarmonyOS的Java UI框架的教程

<?xml version="1.0" encoding="utf-8"?>
<DependentLayout
    xmlns:ohos="http://schemas.huawei.com/res/ohos"
    ohos:width="match_parent"
    ohos:height="match_parent"
    ohos:background_element="#000000">
  <Text
      ohos:id="$+id:text"
      ohos:width="match_content"
      ohos:height="match_content"
      ohos:center_in_parent="true"
      ohos:text="Hello World"
      ohos:text_color="white"
      ohos:text_size="32fp"/>
  <Button
      ohos:id="$+id:button"
      ohos:width="match_content"
      ohos:height="match_content"
      ohos:text_size="19fp"
      ohos:text="Next"
      ohos:top_padding="8vp"
      ohos:bottom_padding="8vp"
      ohos:right_padding="80vp"
      ohos:left_padding="80vp"
      ohos:text_color="white"
      ohos:background_element="$graphic:button_element"
      ohos:center_in_parent="true"
      ohos:align_parent_bottom="true"/>
</DependentLayout>

<?xml version="1.0" encoding="utf-8"?>
<shape
    xmlns:ohos="http://schemas.huawei.com/res/ohos"
    ohos:shape="oval">
  <solid
      ohos:color="#007DFF"/>
</shape>

package com.example.myapplication.slice;
 
import com.example.myapplication.ResourceTable;
import ohos.aafwk.ability.AbilitySlice;
import ohos.aafwk.content.Intent;
 
public class MainAbilitySlice extends AbilitySlice {
 
@Override
public void onStart(Intent intent) {
super.onStart(intent);
super.setUIContent(ResourceTable.Layout_main_layout); // 加载XML布局
}
 
@Override
public void onActive() {
super.onActive();
}
 
@Override
public void onForeground(Intent intent) {
super.onForeground(intent);
}
}

package com.example.myapplication.slice;
 
import ohos.aafwk.ability.AbilitySlice;
import ohos.aafwk.content.Intent;
import ohos.agp.colors.RgbColor;
import ohos.agp.components.DependentLayout;
import ohos.agp.components.DependentLayout.LayoutConfig;
import ohos.agp.components.Text;
import ohos.agp.components.element.ShapeElement;
import ohos.agp.utils.Color;
 
import static ohos.agp.components.ComponentContainer.LayoutConfig.MATCH_PARENT;
import static ohos.agp.components.ComponentContainer.LayoutConfig.MATCH_CONTENT;
 
public class SecondAbilitySlice extends AbilitySlice {
 
  @Override
  public void onStart(Intent intent) {
    super.onStart(intent);
    // 声明布局
    DependentLayout myLayout = new DependentLayout(this);
    // 设置布局大小
    myLayout.setWidth(MATCH_PARENT);
    myLayout.setHeight(MATCH_PARENT);
    ShapeElement element = new ShapeElement();
    element.setRgbColor(new RgbColor(0, 0, 0));
    myLayout.setBackground(element);
 
    // 创建一个文本
    Text text = new Text(this);
    text.setText("Nice to meet you.");
    text.setWidth(MATCH_PARENT);
    text.setTextSize(55);
    text.setTextColor(Color.WHITE);
    // 设置文本的布局
    DependentLayout.LayoutConfig textConfig = new DependentLayout.LayoutConfig(MATCH_CONTENT,MATCH_CONTENT);
    textConfig.addRule(LayoutConfig.CENTER_IN_PARENT);
    text.setLayoutConfig(textConfig);
    myLayout.addComponent(text);
 
    super.setUIContent(myLayout);
  }
 
  @Override
  public void onActive() {
    super.onActive();
  }
 
  @Override
  public void onForeground(Intent intent) {
    super.onForeground(intent);
  }
}

package com.example.myapplication.slice;
 
import com.example.myapplication.ResourceTable;
import ohos.aafwk.ability.AbilitySlice;
import ohos.aafwk.content.Intent;
import ohos.aafwk.content.Operation;
import ohos.agp.components.*;
 
public class MainAbilitySlice extends AbilitySlice {
 
  @Override
  public void onStart(Intent intent) {
    super.onStart(intent);
    super.setUIContent(ResourceTable.Layout_main_layout);
    Button button = (Button) findComponentById(ResourceTable.Id_button);
 
    if (button != null) {
      // 为按钮设置点击回调
      button.setClickedListener(new Component.ClickedListener() {
        @Override
        public void onClick(Component component) {
        Intent secondIntent = new Intent();
        // 指定待启动FA的bundleName和abilityName
        Operation operation = new Intent.OperationBuilder()
            .withDeviceId("")
            .withBundleName("com.example.myapplication")
            .withAbilityName("com.example.myapplication.SecondAbility")
            .build();
        secondIntent.setOperation(operation);
        startAbility(secondIntent); // 通过AbilitySlice的startAbility接口实现启动另一个页面
        }
      });
    }
  }
 
  @Override
  public void onActive() {
    super.onActive();
  }
 
  @Override
  public void onForeground(Intent intent) {
    super.onForeground(intent);
  }
}