Time Subsystem ChangeLog

cl.time.1 API Error Change

Errors thrown by timer APIs of the time subsystem: 202 (non-system application) and 401 (invalid parameters).

Change Impacts

The API change is forward compatible. Applications developed based on earlier versions can still use the APIs, and corresponding error handling is added. The original functions are not affected.

Key API/Component Changes

Before change: - The API throws an error message without an error code.

After change: - The API throws an error message with an error code. Error code 202 indicates that the application is not a system application, and error code 401 indicates that the parameters are invalid.

|Module |Class |Method/Attribute/Enumeration/Constant |Change Type| |—————–|———–|————————————————————|——–| |@ohos.systemTimer|systemTimer|function createTimer(options: TimerOptions, callback: AsyncCallback<number>): void|Changed | |@ohos.systemTimer|systemTimer|function createTimer(options: TimerOptions): Promise<number>|Changed | |@ohos.systemTimer|systemTimer|function startTimer(timer: number, triggerTime: number, callback: AsyncCallback<void>): void|Changed | |@ohos.systemTimer|systemTimer|function startTimer(timer: number, triggerTime: number): Promise<void>|Changed | |@ohos.systemTimer|systemTimer|function stopTimer(timer: number, callback: AsyncCallback<void>): void|Changed | |@ohos.systemTimer|systemTimer|function stopTimer(timer: number): Promise<void> |Changed | |@ohos.systemTimer|systemTimer|function destroyTimer(timer: number, callback: AsyncCallback<void>): void|Changed | |@ohos.systemTimer|systemTimer|function destroyTimer(timer: number): Promise<void> |Changed |

Adaptation Guide

Refer to the code below to capture errors when systemTimer APIs are called in applications.

createTimer callback mode:

Example

export default {
  systemTimer () {
    let options = {
      type: systemTimer.TIMER_TYPE_REALTIME,
      repeat: false
    };
    try {
      systemTimer.createTimer(options, (error, timerId) => {
        if (error) {
          // Capture the permission denial error.
          console.info(`Failed to create timer. message: ${error.message}, code: ${error.code}`);
        }
        console.info(`Succeeded in creating timer. timerId: ${timerId}`);
      });
    } catch(e) {
      // Capture the parameter verification error.
      console.info(`Failed to create timer. message: ${e.message}, code: ${e.code}`);
    }
  }
}

createTimer promise mode:

Example

export default {
  systemTimer () {
    let options = {
      type: systemTimer.TIMER_TYPE_REALTIME,
      repeat: false
    };
    try {
      systemTimer.createTimer(options).then((timerId) => {
        console.info(`Succeeded in creating timer. timerId: ${timerId}`);
      }).catch((error) => {
        // Capture the permission denial error.
        console.info(`Failed to create timer. message: ${error.message}, code: ${error.code}`);
      });
    } catch(e) {
      // Capture the parameter verification error.
      console.info(`Failed to create timer. message: ${e.message}, code: ${e.code}`);
    }
  }
}

startTimer callback mode:

Example

export default {
  async systemTimer () {
    let options = {
      type: systemTimer.TIMER_TYPE_REALTIME,
      repeat:false
    }
    let timerId = await systemTimer.createTimer(options);
    let triggerTime = new Date().getTime();
    triggerTime += 3000;
    try {
      systemTimer.startTimer(timerId, triggerTime, (error) => {
        if (error) {
          // Capture the permission denial error.
          console.error(`Failed to start timer. message: ${error.message}, code: ${error.code}`);
        }
        });
    } catch (e) {
      // Capture the parameter verification error.
      console.info(`Failed to start timer. message: ${e.message}, code: ${e.code}`);
    }
  }
}

startTimer promise mode:

Example

export default {
  async systemTimer (){
    let options = {
      type: systemTimer.TIMER_TYPE_REALTIME,
      repeat:false
    }
    let timerId = await systemTimer.createTimer(options);
    let triggerTime = new Date().getTime();
    triggerTime += 3000;
    try {
      systemTimer.startTimer(timerId, triggerTime).then((data) => {
        console.log(`Succeeded in startting timer. Data:` + data);
      }).catch((error) => {
        // Capture the permission denial error.
        console.info(`Failed to start timer. message: ${error.message}, code: ${error.code}`);
      });
    } catch (e) {
      // Capture the parameter verification error.
      console.info(`Failed to start timer. message: ${e.message}, code: ${e.code}`);
    }
  }
}

stopTimer callback mode:

Example

export default {
  async systemTimer () {
    let options = {
      type: systemTimer.TIMER_TYPE_REALTIME,
      repeat:false
    }
    let timerId = await systemTimer.createTimer(options);
    let triggerTime = new Date().getTime();
    triggerTime += 3000;
    systemTimer.startTimer(timerId, triggerTime);
    try {
      systemTimer.stopTimer(timerId, triggerTime, (error) => {
        if (error) {
          // Capture the permission denial error.
          console.error(`Failed to stop timer. message: ${error.message}, code: ${error.code}`);
        }
        });
    } catch (e) {
      // Capture the parameter verification error.
      console.info(`Failed to stop timer. message: ${e.message}, code: ${e.code}`);
    }
  }
}git 

stopTimer promise mode:

Example

export default {
  async systemTimer (){
    let options = {
      type: systemTimer.TIMER_TYPE_REALTIME,
      repeat:false
    }
    let timerId = await systemTimer.createTimer(options);
    let triggerTime = new Date().getTime();
    triggerTime += 3000;
    systemTimer.startTimer(timerId, triggerTime);
    try {
      systemTimer.stopTimer(timerId, triggerTime).then((data) => {
        console.log(`Succeeded in stop timer. Data:` + data);
      }).catch((error) => {
        // Capture the permission denial error.
        console.info(`Failed to stop timer. message: ${error.message}, code: ${error.code}`);
      });
    } catch (e) {
      // Capture the parameter verification error.
      console.info(`Failed to stop timer. message: ${e.message}, code: ${e.code}`);
    }
  }
}

destroyTimer callback mode:

Example

export default {
  async systemTimer () {
    let options = {
      type: systemTimer.TIMER_TYPE_REALTIME,
      repeat:false
    }
    let timerId = await systemTimer.createTimer(options);
    let triggerTime = new Date().getTime();
    triggerTime += 3000;
    systemTimer.startTimer(timerId, triggerTime);
    systemTimer.stopTimer(timerId);
    try {
      systemTimer.destroyTimer(timerId, triggerTime, (error) => {
        if (error) {
          // Capture the permission denial error.
          console.error(`Failed to destroy timer. message: ${error.message}, code: ${error.code}`);
        }
        });
    } catch (e) {
      // Capture the parameter verification error.
      console.info(`Failed to destroy timer. message: ${e.message}, code: ${e.code}`);
    }
  }
}

destroyTimer promise mode:

Example

export default {
  async systemTimer (){
    let options = {
      type: systemTimer.TIMER_TYPE_REALTIME,
      repeat:false
    }
    let timerId = await systemTimer.createTimer(options);
    let triggerTime = new Date().getTime();
    triggerTime += 3000;
    systemTimer.startTimer(timerId, triggerTime);
    systemTimer.stopTimer(timerId);
    try {
      systemTimer.destroyTimer(timerId, triggerTime).then((data) => {
        console.log(`Succeeded in destroy timer. Data:` + data);
      }).catch((error) => {
        // Capture the permission denial error.
        console.info(`Failed to destroy timer. message: ${error.message}, code: ${error.code}`);
      });
    } catch (e) {
      // Capture the parameter verification error.
      console.info(`Failed to destroy timer. message: ${e.message}, code: ${e.code}`);
    }
  }
}

cl.time.2 API Error Change

Errors thrown by timer APIs of the time subsystem: 201 (permission denied), 202 (non-system application), and 401 (invalid parameters).

Change Impacts

Applications developed based on earlier versions can still use the APIs. When new APIs are used, errors must be captured and processed.

Key API/Component Changes

Before change: - The API throws an error message with error code -1.

After change: - The API throws an error message with an error code. Error code 201 indicates that the permission is denied, error code 202 indicates that the application is not a system application, and error code 401 indicates that the parameters are invalid.

Deprecated APIs can be replaced with new ones with same names.

Adaptation Guide

Refer to the code below to capture errors when systemTime APIs are called in applications. In the examples, the setTime API is invoked.

In callback mode:

Example

import systemDateTime from @ohos.systemDateTime
// Set the system time to 2021-01-20 02:36:25.
let time = 1611081385000;
try {
  systemDateTime.setTime(time, (error) => {
    // Capture permission denial and non-system-application errors.
    if (error) {
      console.info(`Failed to setting time. message: ${error.message}, code: ${error.code}`);
      return;
    }
    console.info(`Succeeded in setting time.`);
  })
} catch(e) {
  // Capture the parameter verification error.
  console.info(`Failed to set time. message: ${e.message}, code: ${e.code}`);
}

In promise mode:

Example

import systemDateTime from @ohos.systemDateTime
// Set the system time to 2021-01-20 02:36:25.
let time = 1611081385000;
try {
  systemDateTime.setTime(time).then(() => {
    console.info(`Succeeded in setting time.`);
  }).catch((error) => {
    // Capture permission denial and non-system-application errors.
    console.info(`Failed to setting time. message: ${error.message}, code: ${error.code}`);
  });
} catch(e) {
   // Capture the parameter verification error.
  console.info(`Failed to set time. message: ${e.message}, code: ${e.code}`);
}

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