HarmonyOS原子化服务卡片开发image and information模板体验 原创

一、项目总述
1.技术相关
项目名称: image_information
项目语言: JAVA
体验模板：image and information
工具：deveco studio
2. 体验素材
天气信息与图片展示
3. 效果如下
图片

二、开发步骤
新建一个java的应用项目
然后构建完成项目后在jltf_template下new->module

选择空的java模板

选择项目的empty，新建Service Widget

选择image and information模板，点击下一步

选择卡片类型，点击finish

登录你的账号然后启动模拟器即可实现效果
三、项目结构介绍

四 关键代码（MainAbility）与体验图片信息实现
public class MainAbility extends Ability {

public static final int DEFAULT_DIMENSION_2X2 = 2;
public static final int DIMENSION_1X2 = 1;
public static final int DIMENSION_2X4 = 3;
public static final int DIMENSION_4X4 = 4;
private static final int INVALID_FORM_ID = -1;
private static final HiLogLabel TAG = new HiLogLabel(HiLog.debug, 0x0, MainAbility.class.getName());
private String topWidgetSlice;

@Override
public void onStart(Intent intent) {
    super.onStart(intent);
    super.setMainRoute(MainAbilitySlice.class.getName());
    if (intentFromWidget(intent)) {
        topWidgetSlice = getRoutePageSlice(intent);
        if (topWidgetSlice != null) {
            setMainRoute(topWidgetSlice);
        }
    }
    stopAbility(intent);
}

@Override
protected ProvideRFormInfo onCreateForm(Intent intent) {
    HiLog.info(TAG, "onCreateForm");
    long formId = intent.getLongParam(AbilitySlice.PARAM_FORM_IDENTITY_KEY, INVALID_FORM_ID);
    String formName = intent.getStringParam(AbilitySlice.PARAM_FORM_NAME_KEY);
    int dimension = intent.getIntParam(AbilitySlice.PARAM_FORM_DIMENSION_KEY, DEFAULT_DIMENSION_2X2);
    HiLog.info(TAG, "onCreateForm: formId=" + formId + ",formName=" + formName);
    FormControllerManager formControllerManager = FormControllerManager.getInstance(this);
    FormController formController = formControllerManager.getController(formId);
    formController = (formController == null) ? formControllerManager.createFormController(formId,
            formName, dimension) : formController;
    if (formController == null) {
        HiLog.error(TAG, "Get null controller. formId: " + formId + ", formName: " + formName);
        return null;
    }
    return formController.bindFormData();
}

@Override
protected void onUpdateForm(long formId) {
    HiLog.info(TAG, "onUpdateForm");
    super.onUpdateForm(formId);
    FormControllerManager formControllerManager = FormControllerManager.getInstance(this);
    FormController formController = formControllerManager.getController(formId);
    formController.updateFormData(formId);
}

@Override
protected void onDeleteForm(long formId) {
    HiLog.info(TAG, "onDeleteForm: formId=" + formId);
    super.onDeleteForm(formId);
    FormControllerManager formControllerManager = FormControllerManager.getInstance(this);
    formControllerManager.deleteFormController(formId);
}

@Override
protected void ontriggerFormEvent(long formId, String message) {
    HiLog.info(TAG, "onTriggerFormEvent: " + message);
    super.onTriggerFormEvent(formId, message);
    FormControllerManager formControllerManager = FormControllerManager.getInstance(this);
    FormController formController = formControllerManager.getController(formId);
    formController.onTriggerFormEvent(formId, message);
}

@Override
public void onNewIntent(Intent intent) {
    if (intentFromWidget(intent)) { // Only response to it when starting from a service widget.
        String newWidgetSlice = getRoutePageSlice(intent);
        if (topWidgetSlice == null || !topWidgetSlice.equals(newWidgetSlice)) {
            topWidgetSlice = newWidgetSlice;
            restart();
        }
    }
}

private boolean intentFromWidget(Intent intent) {
    long formId = intent.getLongParam(AbilitySlice.PARAM_FORM_IDENTITY_KEY, INVALID_FORM_ID);
    return formId != INVALID_FORM_ID;
}

private String getRoutePageSlice(Intent intent) {
    long formId = intent.getLongParam(AbilitySlice.PARAM_FORM_IDENTITY_KEY, INVALID_FORM_ID);
    if (formId == INVALID_FORM_ID) {
        return null;
    }
    FormControllerManager formControllerManager = FormControllerManager.getInstance(this);
    FormController formController = formControllerManager.getController(formId);
    if (formController == null) {
        return null;
    }
    Class<? extends AbilitySlice> clazz = formController.getRoutePageSlice(intent);
    if (clazz == null) {
        return null;
    }
    return clazz.getName();
}
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}
五、完整代码地址：
https://gitee.com/jltfcloudcn/jump_to/tree/master/image_information