Android Device Reference

device is a runtime proxy over the Android emulator API. Use it for emulator-level operations — such as setting location, placing images in the virtual camera scene, configuring network proxies, passing audio to the microphone, or running raw adb commands — that sit outside app UI interactions. Use driver for interacting with the app itself. device is only available while a flow is running.

import { device, flow } from "@qawolf/flows/android";

`setGeoLocation`

Sets the emulator’s GPS location.

function setGeoLocation(options: GeoLocationOptions): Promise<string>;

type GeoLocationOptions = {
  latitude: number;
  longitude: number;
  altitude?: number;
  satellites?: number;
  velocity?: number;
};

Example:

import { device, flow } from "@qawolf/flows/android";

export default flow("Set device location", "Android - Pixel", async () => {
  await device.setGeoLocation({
    latitude: 37.7749,
    longitude: -122.4194,
  });
});

Use this to test location-aware features without physically moving a device. See Mock device location for a full walkthrough.

`setVirtualSceneImage`

Places an image into the Android emulator’s virtual camera scene. Use this to test features that require the camera to see a specific image — such as barcode or QR code scanning.

function setVirtualSceneImage(options: VirtualSceneImageOptions): Promise<string>;

type VirtualSceneImageOptions = {
  /** Path to the image file to place in the virtual scene. Defaults to the default virtual scene image when omitted. */
  image?: string;
  /** Where to place the image in the virtual scene. */
  location: "table" | "wall";
};

Example:

import { device, flow } from "@qawolf/flows/android";

export default flow(
  "Scan barcode",
  { target: "Android - Pixel", launch: true },
  async ({ driver, test }) => {
    await test("place barcode image", async () => {
      await device.setVirtualSceneImage({
        image: "/path/to/barcode.jpg",
        location: "table",
      });
    });
  },
);

Virtual scene is scoped to barcode/QR code scanning and augmented reality (AR) use cases. It is not a general photo or video injection mechanism. See Android barcode and QR scanning for a full walkthrough.

`playAutomation`

Triggers an automation macro on the Android emulator. Use this in combination with setVirtualSceneImage to animate the virtual camera toward a placed image.

function playAutomation(options: PlayAutomationOptions): Promise<string>;

type PlayAutomationOptions =
  | {
      /** Name of a built-in emulator macro. */
      macro: "Reset_position" | "Track_horizontal_plane" | "Track_vertical_plane" | "Walk_to_image_room";
      /** Optional path to override the macro file. */
      overrideMacroPath?: string;
    }
  | {
      /** Path to a custom macro file. */
      file: string;
    };

Example:

import { device, flow } from "@qawolf/flows/android";

export default flow(
  "Scan barcode",
  { target: "Android - Pixel", launch: true },
  async ({ driver, test }) => {
    await test("place barcode and animate camera", async () => {
      await device.setVirtualSceneImage({
        image: "/path/to/barcode.jpg",
        location: "table",
      });

      await device.playAutomation({
        macro: "Walk_to_image_room",
      });
    });
  },
);

Available built-in macros are determined by the Android emulator. Walk_to_image_room is the macro used to animate the virtual camera toward a placed image. See Android Emulator camera support for more detail on virtual scene automation.

`setProxy`

Configures a proxy for the Android emulator’s network traffic.

function setProxy(options: ProxyOptions): Promise<string>;

type ProxyOptions = {
  /** Proxy URL. Include credentials in the URL if authentication is required (e.g. `http://username:password@proxy.example.com:8080`). */
  url: string;
};

Example:

import { device, flow } from "@qawolf/flows/android";

export default flow("Set proxy", "Android - Pixel", async () => {
  await device.setProxy({
    url: "http://proxy.example.com:8080",
  });
});

`clearProxy`

Removes any proxy configuration from the Android emulator.

function clearProxy(): Promise<string>;

Example:

import { device, flow } from "@qawolf/flows/android";

export default flow("Clear proxy", "Android - Pixel", async () => {
  await device.clearProxy();
});

Call clearProxy() at the end of any flow that sets a proxy to avoid affecting subsequent flows.

`passAudioAsMicrophoneInput`

Plays an audio file on the runner host so the emulator receives it as microphone input. Use this to test recording, voice, or speech-recognition features with known audio.

function passAudioAsMicrophoneInput(options: PassAudioAsMicrophoneInputOptions): Promise<string>;

type PassAudioAsMicrophoneInputOptions = {
  /** File path on the runner host, or URL, for the audio to play. */
  data: string;
  /** Delay in seconds before playback starts. */
  delaySeconds?: number;
  /** Maximum playback duration in seconds. Omit to play the whole file. */
  durationSeconds?: number;
};

Example:

import { device, flow } from "@qawolf/flows/android";

export default flow(
  "Inject microphone audio",
  { target: "Android - Pixel", launch: true },
  async ({ driver, test }) => {
    await test("play audio into the microphone", async () => {
      await device.passAudioAsMicrophoneInput({
        data: `${process.env.TEAM_STORAGE_DIR}/audio.mp3`,
        durationSeconds: 10,
      });
    });
  },
);

Playback is bounded by the command timeout (1 minute by default). For audio longer than a minute, pass durationSeconds. See Microphone injection for a full walkthrough.

`adb`

Runs an adb command against the emulator and returns its combined stdout/stderr. Use this as an escape hatch for emulator or device operations not covered by a dedicated device method — such as dumpsys, emu sensor set, or pull. Pass the arguments either as a single string (split on whitespace; quote a single value that contains spaces) or as an array (preferred when building arguments programmatically). The command does not go through a host shell, so it does not expand variables or run pipes.

function adb(command: string | string[]): Promise<string>;

Example:

import { device, flow } from "@qawolf/flows/android";

export default flow(
  "Run adb commands",
  { target: "Android - Pixel", launch: true },
  async ({ driver, test }) => {
    await test("send a keyevent and pull a file", async () => {
      await device.adb("shell input keyevent 26");

      // quote a value that contains spaces, or pass an array to avoid quoting
      await device.adb([
        "pull",
        "/sdcard/Recordings/My recording 1.m4a",
        `${process.env.TEAM_STORAGE_DIR}/recorded.m4a`,
      ]);
    });
  },
);

Real-world example — jump the device clock to test time-gated features (disable auto time, move the clock, then restore):

import { device, flow } from "@qawolf/flows/android";

export default flow(
  "Verify a time-gated feature can't be gamed",
  { target: "Android - Pixel", launch: true },
  async ({ driver, test }) => {
    await test("jump the device clock forward", async () => {
      // Disable automatic time so the manual clock sticks
      await device.adb("shell settings put global auto_time 0");

      // Move the device clock forward 2 days
      const targetMillis = Date.now() + 2 * 24 * 60 * 60 * 1000;
      await device.adb(`shell cmd alarm set-time ${targetMillis}`);

      // ... assert the time-gated feature (rewards/streaks) behaves correctly ...

      // Restore automatic time
      await device.adb("shell settings put global auto_time 1");
    });
  },
);

Prefer a dedicated device method when one exists. See Measure performance and Mock hardware sensors for adb usage in context.

​setGeoLocation

​setVirtualSceneImage

​playAutomation

​setProxy

​clearProxy

​passAudioAsMicrophoneInput

​adb

`setGeoLocation`

`setVirtualSceneImage`

`playAutomation`

`setProxy`

`clearProxy`

`passAudioAsMicrophoneInput`

`adb`