Automate adding finger prints for biometric adb commands.

Note : This solution will only work for emulator.

Installations:

1. Android studio
2. Appium.
3. Adb.

Step 1: Start an emulator using android studio or any emulator.

Step 2: Initiate a driver in your code as

DesiredCapabilities caps = new DesiredCapabilities();
caps.setCapability("platformName", "android");
caps.setCapability("deviceName", "Pixel3");
caps.setCapability("appPackage", "com.android.settings");
caps.setCapability("appActivity","com.android.settings.Settings");
caps.setCapability("automationName","uiautomator2");
driver = new AndroidDriver(new URL("http://0.0.0.0:4723/wd/hub"), caps);
driver.manage().timeouts().implicitlyWait(20, TimeUnit.SECONDS);

Step 4:Add same capabilities in your appium desktop and save it.

Start appium sever.

Step 5: Write a function in your code to run the adb commands

private void executeCommand(String cmd){
    ProcessBuilder processBuilder = new ProcessBuilder();


    processBuilder.command("bash", "-c", cmd);

    try {

        Process process = processBuilder.start();

        StringBuilder output = new StringBuilder();

        BufferedReader reader = new BufferedReader(
                new InputStreamReader(process.getInputStream()));

        String line;
        while ((line = reader.readLine()) != null) {
            output.append(line + "\n");
        }

        BufferedReader ereader = new BufferedReader(
                new InputStreamReader(process.getErrorStream()));

        String eline;
        while ((eline = ereader.readLine()) != null) {
            output.append(eline + "\n");
        }

        int exitCode = process.waitFor();
        if (exitCode == 0) {
            System.out.println("Success");
            System.out.println(output);

        } else {
            System.out.println("Failure");
            System.out.println(output);
        }

    } catch (IOException e) {
        e.printStackTrace();
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
}

Step 6: Navigate to the add fingerprint screen from your code and call the above function.

for (int i = 1; i <= 3; i++)
{
    Thread.sleep(5000);
    executeCommand("adb -e emu finger touch 1");
}

Use driver.fingerPrint(1) to pass the test using added fingerprint.