@ohos.screen (Screen)

The Screen module implements basic screen management. You can use the APIs of this module to obtain a Screen object, listen for screen changes, and create and destroy virtual screens.

NOTE

The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.

The APIs provided by this module are system APIs.

Modules to Import

import screen from '@ohos.screen';

screen.getAllScreens

getAllScreens(callback: AsyncCallback<Array<Screen>>): void

Obtains all screens. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Parameters

Error codes

For details about the error codes, see Display Error Codes.

Example

import { BusinessError } from '@ohos.base';

let screenClass: screen.Screen | null = null;
screen.getAllScreens((err: BusinessError, data: Array<screen.Screen>) => {
  const errCode: number = err.code;
  if (errCode) {
    console.error('Failed to get all screens. Cause:  ' + JSON.stringify(err));
    return;
  }
  console.info('Succeeded in getting all screens. Data:' + JSON.stringify(data));
  screenClass = data[0];
});

screen.getAllScreens

getAllScreens(): Promise<Array<Screen>>

Obtains all screens. This API uses a promise to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Return value

Error codes

For details about the error codes, see Display Error Codes.

Example

import { BusinessError } from '@ohos.base';

let screenClass: screen.Screen | null = null;
let promise: Promise<Array<screen.Screen>> = screen.getAllScreens();
promise.then((data: Array<screen.Screen>) => {
  screenClass = data[0];
  console.log('Succeeded in getting all screens. Data:' + JSON.stringify(data));
}).catch((err: BusinessError) => {
  console.log('Failed to get all screens. Cause: ' + JSON.stringify(err));
});

screen.on('connect' | 'disconnect' | 'change')

on(eventType: 'connect' | 'disconnect' | 'change', callback: Callback<number>): void

Subscribes to events related to the screen state.

System capability: SystemCapability.WindowManager.WindowManager.Core

Parameters

Example

try {
  let callback: Callback<number> = (data: number) => {
    console.info('Succeeded in registering the callback for screen changes. Data: ' + JSON.stringify(data))
  };
  screen.on('connect', callback);
} catch (exception) {
  console.error('Failed to register the callback for screen changes. Code: ' + JSON.stringify(exception));
};

screen.off('connect' | 'disconnect' | 'change')

off(eventType: 'connect' | 'disconnect' | 'change', callback?: Callback<number>): void

Unsubscribes from events related to the screen state.

System capability: SystemCapability.WindowManager.WindowManager.Core

Parameters

Example

try {
  let callback: Callback<number> = (data: number) => {
    console.info('Succeeded in unregistering the callback for screen changes. Data: ' + JSON.stringify(data))
  };
  screen.off('connect', callback);
} catch (exception) {
  console.error('Failed to register the callback for screen changes. Code: ' + JSON.stringify(exception));
};

screen.makeExpand

makeExpand(options:Array<ExpandOption>, callback: AsyncCallback<number>): void

Sets the screen to the expanded mode. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Parameters

Error codes

For details about the error codes, see Display Error Codes.

Example

import { BusinessError } from '@ohos.base';

try {
  let groupId: number | null = null;
  class ExpandOption {
    screenId: number = 0;
    startX: number = 0;
    startY: number = 0;
  }
  let mainScreenOption: ExpandOption = { screenId: 0, startX: 0, startY: 0 };
  let otherScreenOption: ExpandOption = { screenId: 1, startX: 1080, startY: 0 };
  let expandOptionArray : ExpandOption[] = [ mainScreenOption, otherScreenOption ];
  screen.makeExpand(expandOptionArray, (err: BusinessError, data: number) => {
    const errCode: number = err.code;
    if (errCode) {
      console.error('Failed to expand the screen. Code:' + JSON.stringify(err));
      return;
    }
    groupId = data;
    console.info('Succeeded in expanding the screen. Data: ' + JSON.stringify(data));
  });
} catch (exception) {
  console.error('Failed to expand the screen. Code: ' + JSON.stringify(exception));
};

screen.makeExpand

makeExpand(options:Array<ExpandOption>): Promise<number>

Sets the screen to the expanded mode. This API uses a promise to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Parameters

Return value

Error codes

For details about the error codes, see Display Error Codes.

Example

import { BusinessError } from '@ohos.base';

try {
  class ExpandOption {
    screenId: number = 0;
    startX: number = 0;
    startY: number = 0;
  }
  let mainScreenOption: ExpandOption = { screenId: 0, startX: 0, startY: 0 };
  let otherScreenOption: ExpandOption = { screenId: 1, startX: 1080, startY: 0 };
  let expandOptionArray : ExpandOption[] = [ mainScreenOption, otherScreenOption ];
  screen.makeExpand(expandOptionArray).then((
    data: number) => {
    console.info('Succeeded in expanding the screen. Data: ' + JSON.stringify(data));
  }).catch((err: BusinessError) => {
    console.error('Failed to expand the screen. Code:' + JSON.stringify(err));
  });
} catch (exception) {
  console.error('Failed to expand the screen. Code: ' + JSON.stringify(exception));
};

screen.stopExpand¹⁰⁺

stopExpand(expandScreen:Array<number>, callback: AsyncCallback<void>): void

Stops the expanded mode. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Parameters

Error codes

For details about the error codes, see Display Error Codes.

Example

import { BusinessError } from '@ohos.base';

try {
  let expandScreenIds: Array<number> = [1, 2, 3];
  screen.stopExpand(expandScreenIds, (err: BusinessError) => {
    const errCode: number = err.code;
    if (errCode) {
      console.error('Failed to stop expand screens. Code:' + JSON.stringify(err));
      return;
    }
    console.info('Succeeded in stopping expand screens.');
  });
} catch (exception) {
  console.error('Failed to stop expand screens. Code: ' + JSON.stringify(exception));
};

screen.stopExpand¹⁰⁺

stopExpand(expandScreen:Array<number>): Promise<void>

Stops the expanded mode. This API uses a promise to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Parameters

Return value

Error codes

For details about the error codes, see Display Error Codes.

Example

import { BusinessError } from '@ohos.base';

try {
  let expandScreenIds: Array<number> = [1, 2, 3];
  screen.stopExpand(expandScreenIds).then(() => {
    console.info('Succeeded in stopping expand screens.');
  }).catch((err: BusinessError) => {
    console.error('Failed to stop expand screens. Code:' + JSON.stringify(err));
  });
} catch (exception) {
  console.error('Failed to stop expand screens. Code:' + JSON.stringify(exception));
};

screen.makeMirror

makeMirror(mainScreen:number, mirrorScreen:Array<number>, callback: AsyncCallback<number>): void

Sets screen mirroring. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Parameters

Error codes

For details about the error codes, see Display Error Codes.

Example

import { BusinessError } from '@ohos.base';

let mainScreenId: number = 0;
let mirrorScreenIds: Array<number> = [1, 2, 3];
try {
  screen.makeMirror(mainScreenId, mirrorScreenIds, (err: BusinessError, data: number) => {
    const errCode: number = err.code;
    if (errCode) {
      console.error('Failed to set screen mirroring. Code: ' + JSON.stringify(err));
      return;
    }
    console.info('Succeeded in setting screen mirroring. Data: ' + JSON.stringify(data));
  });
} catch (exception) {
  console.error('Failed to set screen mirroring. Code: ' + JSON.stringify(exception));
};

screen.makeMirror

makeMirror(mainScreen:number, mirrorScreen:Array<number>): Promise<number>

Sets screen mirroring. This API uses a promise to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Parameters

Return value

Error codes

For details about the error codes, see Display Error Codes.

Example

import { BusinessError } from '@ohos.base';

let mainScreenId: number = 0;
let mirrorScreenIds: Array<number> = [1, 2, 3];
try {
  screen.makeMirror(mainScreenId, mirrorScreenIds).then((data: number) => {
    console.info('Succeeded in setting screen mirroring. Data: ' + JSON.stringify(data));
  }).catch((err: BusinessError) => {
    console.error('Failed to set screen mirroring. Code: ' + JSON.stringify(err));
  });
} catch (exception) {
  console.error('Failed to set screen mirroring. Code: ' + JSON.stringify(exception));
};

screen.stopMirror¹⁰⁺

stopMirror(mirrorScreen:Array<number>, callback: AsyncCallback<void>): void

Stops screen mirroring. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Parameters

Error codes

For details about the error codes, see Display Error Codes.

Example

import { BusinessError } from '@ohos.base';

try {
  let mirrorScreenIds: Array<number> = [1, 2, 3];
  screen.stopMirror(mirrorScreenIds, (err: BusinessError) => {
    const errCode: number = err.code;
    if (errCode) {
      console.error('Failed to stop mirror screens. Code:' + JSON.stringify(err));
      return;
    }
    console.info('Succeeded in stopping mirror screens.');
  });
} catch (exception) {
  console.error('Failed to stop mirror screens. Code: ' + JSON.stringify(exception));
};

screen.stopMirror¹⁰⁺

stopMirror(mirrorScreen:Array<number>): Promise<void>

Stops screen mirroring. This API uses a promise to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Parameters

Return value

Error codes

For details about the error codes, see Display Error Codes.

Example

import { BusinessError } from '@ohos.base';

try {
  let mirrorScreenIds: Array<number> = [1, 2, 3];
  screen.stopMirror(mirrorScreenIds).then(() => {
    console.info('Succeeded in stopping mirror screens.');
  }).catch((err: BusinessError) => {
    console.error('Failed to stop mirror screens. Code:' + JSON.stringify(err));
  });
} catch (exception) {
  console.error('Failed to stop mirror screens. Code:' + JSON.stringify(exception));
};

screen.createVirtualScreen

createVirtualScreen(options:VirtualScreenOption, callback: AsyncCallback<Screen>): void

Creates a virtual screen. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Required permissions: ohos.permission.CAPTURE_SCREEN (mandatory when VirtualScreenOption.surfaceId is valid; available only to system applications)

Parameters

Error codes

For details about the error codes, see Display Error Codes.

Example

import { BusinessError } from '@ohos.base';

let screenClass: screen.Screen | null = null;
try {
  class VirtualScreenOption {
    name : string = '';
    width : number =  0;
    height : number = 0;
    density : number = 0;
    surfaceId : string = '';
  }

  let option : VirtualScreenOption = { 
    name: 'screen01',
    width: 1080,
    height: 2340,
    density: 2,
    surfaceId: ''
  };
  screen.createVirtualScreen(option, (err: BusinessError, data: screen.Screen) => {
    const errCode: number = err.code;
    if (errCode) {
      console.error('Failed to create the virtual screen. Code: ' + JSON.stringify(err));
      return;
    }
    screenClass = data;
    console.info('Succeeded in creating the virtual screen. Data: ' + JSON.stringify(data));
  });
} catch (exception) {
  console.error('Failed to create the virtual screen. Code: ' + JSON.stringify(exception));
};

screen.createVirtualScreen

createVirtualScreen(options:VirtualScreenOption): Promise<Screen>

Creates a virtual screen. This API uses a promise to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Required permissions: ohos.permission.CAPTURE_SCREEN (mandatory when VirtualScreenOption.surfaceId is valid; available only to system applications)

Parameters

Return value

Error codes

For details about the error codes, see Display Error Codes.

Example

import { BusinessError } from '@ohos.base';

let screenClass: screen.Screen | null = null;
try {
  class VirtualScreenOption {
    name : string = '';
    width : number =  0;
    height : number = 0;
    density : number = 0;
    surfaceId : string = '';
  }

  let option : VirtualScreenOption = { 
    name: 'screen01',
    width: 1080,
    height: 2340,
    density: 2,
    surfaceId: ''
  };

  screen.createVirtualScreen(option).then((data: screen.Screen) => {
    screenClass = data;
    console.info('Succeeded in creating the virtual screen. Data: ' + JSON.stringify(data));
  }).catch((err: BusinessError) => {
    console.error('Failed to create the virtual screen. Code: ' + JSON.stringify(err));
  });
} catch (exception) {
  console.error('Failed to create the virtual screen. Code: ' + JSON.stringify(exception));
};

screen.destroyVirtualScreen

destroyVirtualScreen(screenId:number, callback: AsyncCallback<void>): void

Destroys a virtual screen. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Parameters

Error codes

For details about the error codes, see Display Error Codes.

Example

import { BusinessError } from '@ohos.base';

let screenId: number = 1;
try {
  screen.destroyVirtualScreen(screenId, (err: BusinessError) => {
    const errCode: number = err.code;
    if (errCode) {
      console.error('Failed to destroy the virtual screen. Code: ' + JSON.stringify(err));
      return;
    }
    console.info('Succeeded in destroying the virtual screen.');
  });
} catch (exception) {
  console.error('Failed to destroy the virtual screen. Code: ' + JSON.stringify(exception));
};

screen.destroyVirtualScreen

destroyVirtualScreen(screenId:number): Promise<void>

Destroys a virtual screen. This API uses a promise to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Parameters

Return value

Error codes

For details about the error codes, see Display Error Codes.

Example

import { BusinessError } from '@ohos.base';

let screenId: number = 1;
try {
  screen.destroyVirtualScreen(screenId).then(() => {
    console.info('Succeeded in destroying the virtual screen.');
  }).catch((err: BusinessError) => {
    console.error('Failed to destroy the virtual screen. Code: ' + JSON.stringify(err));
  });
} catch (exception) {
  console.error('Failed to destroy the virtual screen. Code: ' + JSON.stringify(exception));
};

screen.setVirtualScreenSurface

setVirtualScreenSurface(screenId:number, surfaceId: string, callback: AsyncCallback<void>): void

Sets the surface for a virtual screen. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Required permissions: ohos.permission.CAPTURE_SCREEN (available only to system applications)

Parameters

Error codes

For details about the error codes, see Display Error Codes.

Example

import { BusinessError } from '@ohos.base';

let screenId: number = 1;
let surfaceId: string = '2048';
try {
  screen.setVirtualScreenSurface(screenId, surfaceId, (err: BusinessError) => {
    const errCode: number = err.code;
    if (errCode) {
      console.error('Failed to set the surface for the virtual screen. Code: ' + JSON.stringify(err));
      return;
    }
    console.info('Succeeded in setting the surface for the virtual screen.');
  });
} catch (exception) {
  console.error('Failed to set the surface for the virtual screen. Code: ' + JSON.stringify(exception));
};

screen.setVirtualScreenSurface

setVirtualScreenSurface(screenId:number, surfaceId: string): Promise<void>

Sets the surface for a virtual screen. This API uses a promise to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Required permissions: ohos.permission.CAPTURE_SCREEN (available only to system applications)

Parameters

Return value

Error codes

For details about the error codes, see Display Error Codes.

Example

import { BusinessError } from '@ohos.base';

let screenId: number = 1;
let surfaceId: string = '2048';
try {
  screen.setVirtualScreenSurface(screenId, surfaceId).then(() => {
    console.info('Succeeded in setting the surface for the virtual screen.');
  }).catch((err: BusinessError) => {
    console.error('Failed to set the surface for the virtual screen. Code: ' + JSON.stringify(err));
  });
} catch (exception) {
  console.error('Failed to set the surface for the virtual screen. Code: ' + JSON.stringify(exception));
};

screen.isScreenRotationLocked

isScreenRotationLocked(): Promise<boolean>

Checks whether auto rotate is locked. This API uses a promise to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Return value

Example

import { BusinessError } from '@ohos.base';

screen.isScreenRotationLocked().then((isLocked: boolean) => {
  console.info('Succeeded in getting the screen rotation lock status. isLocked:' + JSON.stringify(isLocked));
}).catch((err: BusinessError) => {
  console.error('Failed to get the screen rotation lock status. Cause:' + JSON.stringify(err));
});

screen.isScreenRotationLocked

isScreenRotationLocked(callback: AsyncCallback<boolean>): void

Checks whether auto rotate is locked. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Parameters

Example

import { BusinessError } from '@ohos.base';

screen.isScreenRotationLocked((err: BusinessError, isLocked: boolean) => {
  const errCode: number = err.code;
  if (errCode) {
    console.error('Failed to get the screen rotation lock status. Cause:' + JSON.stringify(err));
    return;
  }
  console.info('Succeeded in getting the screen rotation lock status. isLocked:' + JSON.stringify(isLocked));
});

screen.setScreenRotationLocked

setScreenRotationLocked(isLocked: boolean): Promise<void>

Sets whether to lock auto rotate. This API uses a promise to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Parameters

Return value

Example

import { BusinessError } from '@ohos.base';

let isLocked: boolean = false;
try {
  screen.setScreenRotationLocked(isLocked).then(() => {
    console.info('Succeeded in unlocking auto rotate');
  }).catch((err: BusinessError) => {
    console.error('Failed to unlock auto rotate. Code: ' + JSON.stringify(err));
  });
} catch (exception) {
  console.error('Failed to unlock auto rotate. Code: ' + JSON.stringify(exception));
};

screen.setScreenRotationLocked

setScreenRotationLocked(isLocked: boolean, callback: AsyncCallback<void>): void

Sets whether to lock auto rotate. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Parameters

Example

import { BusinessError } from '@ohos.base';

let isLocked: boolean = false;
try {
  screen.setScreenRotationLocked(isLocked, (err: BusinessError) => {
    const errCode: number = err.code;
    if (errCode) {
      console.error('Failed to unlock auto rotate. Cause:' + JSON.stringify(err));
      return;
    }
    console.info('Succeeded in unlocking auto rotate.');
  });
} catch (exception) {
  console.error('Failed to unlock auto rotate. Code: ' + JSON.stringify(exception));
};

ExpandOption

Defines the parameters for expanding a screen.

System capability: SystemCapability.WindowManager.WindowManager.Core

VirtualScreenOption

Defines virtual screen parameters.

System capability: SystemCapability.WindowManager.WindowManager.Core

Screen

Implements a Screen instance.

Before calling any API in Screen, you must use getAllScreens() or createVirtualScreen() to obtain a Screen instance.

Attributes

System capability: SystemCapability.WindowManager.WindowManager.Core

setOrientation

setOrientation(orientation: Orientation, callback: AsyncCallback<void>): void

Sets the screen orientation. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Error codes

For details about the error codes, see Display Error Codes.

Example

import { BusinessError } from '@ohos.base';

  try {
    class VirtualScreenOption {
      name : string = '';
      width : number =  0;
      height : number = 0;
      density : number = 0;
      surfaceId : string = '';
    }

    let option : VirtualScreenOption = {
      name: 'screen01',
      width: 1080,
      height: 2340,
      density: 2,
      surfaceId: ''
    };

    screen.createVirtualScreen(option).then((data: screen.Screen) => {
      let screenClass: screen.Screen = data;
      console.info('Succeeded in creating the virtual screen. Data: ' + JSON.stringify(data));
      screenClass.setOrientation(screen.Orientation.VERTICAL, (err: BusinessError) => {
        const errCode: number = err.code;
        if (errCode) {
          console.error('Failed to set the vertical orientation. Code: ' + JSON.stringify(err));
          return;
        }
        console.info('Succeeded in setting the vertical orientation.');
      });
    }).catch((err: BusinessError) => {
      console.error('Failed to create the virtual screen. Code: ' + JSON.stringify(err));
    });
  } catch (exception) {
    console.error('Failed to set the vertical orientation. Code: ' + JSON.stringify(exception));
  };

setOrientation

setOrientation(orientation: Orientation): Promise<void>

Sets the screen orientation. This API uses a promise to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Return value

Error codes

For details about the error codes, see Display Error Codes.

Example

import { BusinessError } from '@ohos.base';

  try {
    class VirtualScreenOption {
      name : string = '';
      width : number =  0;
      height : number = 0;
      density : number = 0;
      surfaceId : string = '';
    }

    let option : VirtualScreenOption = {
      name: 'screen01',
      width: 1080,
      height: 2340,
      density: 2,
      surfaceId: ''
    };

    screen.createVirtualScreen(option).then((data: screen.Screen) => {
      let screenClass: screen.Screen = data;
      console.info('Succeeded in creating the virtual screen. Data: ' + JSON.stringify(data));
      let promise: Promise<void> = screenClass.setOrientation(screen.Orientation.VERTICAL);
      promise.then(() => {
        console.info('Succeeded in setting the vertical orientation.');
      }).catch((err: BusinessError) => {
        console.error('Failed to set the vertical orientation. Cause: ' + JSON.stringify(err));
      });
    }).catch((err: BusinessError) => {
      console.error('Failed to create the virtual screen. Code: ' + JSON.stringify(err));
    });
  } catch (exception) {
    console.error('Failed to set the vertical orientation. Code: ' + JSON.stringify(exception));
  };

setScreenActiveMode

setScreenActiveMode(modeIndex: number, callback: AsyncCallback<void>): void

Sets the active mode of the screen. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Error codes

For details about the error codes, see Display Error Codes.

Example

import { BusinessError } from '@ohos.base';

try {
  class VirtualScreenOption {
    name : string = '';
    width : number =  0;
    height : number = 0;
    density : number = 0;
    surfaceId : string = '';
  }

  let option : VirtualScreenOption = {
    name: 'screen01',
    width: 1080,
    height: 2340,
    density: 2,
    surfaceId: ''
  };

  screen.createVirtualScreen(option).then((data: screen.Screen) => {
    let screenClass: screen.Screen = data;
    console.info('Succeeded in creating the virtual screen. Data: ' + JSON.stringify(data));
    let modeIndex: number = 0;
    screenClass.setScreenActiveMode(modeIndex, (err: BusinessError) => {
      const errCode: number = err.code;
      if (errCode) {
        console.error('Failed to set screen active mode 0. Code: ' + JSON.stringify(err));
        return;
      }
      console.info('Succeeded in setting the vertical orientation.');
    });
  }).catch((err: BusinessError) => {
    console.error('Failed to create the virtual screen. Code: ' + JSON.stringify(err));
  });
} catch (exception) {
  console.error('Failed to set the vertical orientation. Code: ' + JSON.stringify(exception));
};

setScreenActiveMode

setScreenActiveMode(modeIndex: number): Promise<void>

Sets the active mode of the screen. This API uses a promise to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Return value

Error codes

For details about the error codes, see Display Error Codes.

Example

import { BusinessError } from '@ohos.base';

try {
  class VirtualScreenOption {
    name : string = '';
    width : number =  0;
    height : number = 0;
    density : number = 0;
    surfaceId : string = '';
  }

  let option : VirtualScreenOption = {
    name: 'screen01',
    width: 1080,
    height: 2340,
    density: 2,
    surfaceId: ''
  };

  screen.createVirtualScreen(option).then((data: screen.Screen) => {
    let screenClass: screen.Screen = data;
    console.info('Succeeded in creating the virtual screen. Data: ' + JSON.stringify(data));
    let modeIndex: number = 0;
    let promise: Promise<void> = screenClass.setScreenActiveMode(modeIndex);
    promise.then(() => {
      console.info('Succeeded in setting screen active mode 0.');
    }).catch((err: BusinessError) => {
      console.error('Failed to set screen active mode 0. Code: ' + JSON.stringify(err));
    });
  }).catch((err: BusinessError) => {
    console.error('Failed to create the virtual screen. Code: ' + JSON.stringify(err));
  });
} catch (exception) {
  console.error('Failed to set the vertical orientation. Code: ' + JSON.stringify(exception));
};

setDensityDpi

setDensityDpi(densityDpi: number, callback: AsyncCallback<void>): void;

Sets the pixel density of the screen. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Error codes

For details about the error codes, see Display Error Codes.

Example

import { BusinessError } from '@ohos.base';

let densityDpi: number = 320;
try {
  class VirtualScreenOption {
    name : string = '';
    width : number =  0;
    height : number = 0;
    density : number = 0;
    surfaceId : string = '';
  }

  let option : VirtualScreenOption = {
    name: 'screen01',
    width: 1080,
    height: 2340,
    density: 2,
    surfaceId: ''
  };

  screen.createVirtualScreen(option).then((data: screen.Screen) => {
    let screenClass: screen.Screen = data;
    console.info('Succeeded in creating the virtual screen. Data: ' + JSON.stringify(data));
    screenClass.setDensityDpi(densityDpi, (err: BusinessError) => {
      const errCode: number = err.code;
      if (errCode) {
        console.error('Failed to set the pixel density of the screen to 320. Code: ' + JSON.stringify(err));
        return;
      }
      console.info('Succeeded in setting the vertical orientation.');
    });
  }).catch((err: BusinessError) => {
    console.error('Failed to create the virtual screen. Code: ' + JSON.stringify(err));
  });
} catch (exception) {
  console.error('Failed to set the vertical orientation. Code: ' + JSON.stringify(exception));
};

setDensityDpi

setDensityDpi(densityDpi: number): Promise<void>

Sets the pixel density of the screen. This API uses a promise to return the result.

System capability: SystemCapability.WindowManager.WindowManager.Core

Return value

Error codes

For details about the error codes, see Display Error Codes.

Example

import { BusinessError } from '@ohos.base';

let densityDpi: number = 320;
try {
  class VirtualScreenOption {
    name : string = '';
    width : number =  0;
    height : number = 0;
    density : number = 0;
    surfaceId : string = '';
  }

  let option : VirtualScreenOption = {
    name: 'screen01',
    width: 1080,
    height: 2340,
    density: 2,
    surfaceId: ''
  };

  screen.createVirtualScreen(option).then((data: screen.Screen) => {
    let screenClass: screen.Screen = data;
    let promise: Promise<void> = screenClass.setDensityDpi(densityDpi);
    promise.then(() => {
      console.info('Succeeded in setting the pixel density of the screen to 320.');
    }).catch((err: BusinessError) => {
      console.error('Failed to set the pixel density of the screen to 320. Code: ' + JSON.stringify(err));
    });
  }).catch((err: BusinessError) => {
    console.error('Failed to create the virtual screen. Code: ' + JSON.stringify(err));
  });
} catch (exception) {
  console.error('Failed to set the vertical orientation. Code: ' + JSON.stringify(exception));
};

Orientation

Enumerates the screen orientations.

System capability: SystemCapability.WindowManager.WindowManager.Core

ScreenSourceMode¹⁰⁺

Enumerates the display content source modes of the screen.

System capability: SystemCapability.WindowManager.WindowManager.Core

ScreenModeInfo

Defines the screen mode information.

System capability: SystemCapability.WindowManager.WindowManager.Core