import org.testng.annotations.AfterClass;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.BeforeMethod;

import com.github.wasiqb.coteafs.appium.android.vodqa.actions.LoginActivityAction;
import com.github.wasiqb.coteafs.appium.service.AppiumServer;

public class SampleTest {
    protected AndroidDevice androidDevice;
    private   AppiumServer  androidServer;

    @BeforeClass
    public void setupTestSuite () {
        // Here the parameter refers to the key in server block in config file.
        this.androidServer = new AppiumServer ("android_server");
        this.androidServer.start ();

        // Here the param refers to the key in devices block in config file.
        this.androidDevice = new AndroidDevice (this.androidServer, "android_device");
        this.androidDevice.start ();
        this.androidDevice.startRecording ();
        this.androidDevice.startStreaming ();
    }

    @AfterClass (alwaysRun = true)
    public void tearDownTestSuite () {
        this.androidDevice.stopStreaming ();
        this.androidDevice.stopRecording ();
        this.androidDevice.stop ();
        this.androidServer.stop ();
    }

    @Test
    public void login () {
        final LoginActivityAction login = new LoginActivityAction (this.androidDevice);
        login.addInputValue ("UserName", "admin")
            .addInputValue ("Password", "admin")
            .perform ();
    }
}

import org.openqa.selenium.By;

import com.github.wasiqb.coteafs.appium.android.AndroidDevice;
import com.github.wasiqb.coteafs.appium.device.DeviceElement;

public class LoginActivity extends AndroidActivity {
    public LoginActivity (final AndroidDevice device) {
        super (device);
    }

    @Override
    protected DeviceElement prepare () {
        final DeviceElement main = DeviceElement.create ("Main")
            .forAndroid (By.id ("android:id/content"));
        DeviceElement.create ("Back")
            .parent (main)
            .forAndroid (By.xpath ("//android.widget.TextView[@text=\"Back\"]"))
            // We can set multiple locators for different Automation names.
            .forAndroid (AutomationType.UIAUTOMATOR2,
                MobileBy.AndroidUIAutomator ("new UiSelector ().text (\"Back\");"));
        DeviceElement.create ("UserName")
            .forAndroid (MobileBy.AccessibilityId ("username"))
            .parent (main);
        DeviceElement.create ("Password")
            .forAndroid (MobileBy.AccessibilityId ("password"))
            .parent (main);
        DeviceElement.create ("Login")
            .index (1)    // Index of element when multiple elements for same locator exists.
            .waitStrategy (WaitStrategy.VISIBLE)  // Wait strategy to be used while finding the element.
            .forAndroid (MobileBy.AccessibilityId ("login"))     // Locator used to find the element.
            .parent (main);    // Parent of current element.
        return main;
    }
}

import com.github.wasiqb.coteafs.appium.android.AndroidActivityActions;
import com.github.wasiqb.coteafs.appium.android.AndroidDevice;
import com.github.wasiqb.coteafs.appium.android.vodqa.activities.LoginActivity;

public class LoginActivityAction extends AndroidActivityActions {
    public LoginActivityAction (final AndroidDevice device) {
        super (device);
    }

    @Override
    public void perform () {
        final LoginActivity login = new LoginActivity (getDevice ());
        login.onElement ("UserName")
            .enterText (value ("UserName"));
        login.onElement ("Password")
            .enterText (value ("Password"));
        login.onDevice ()
            .hideKeyboard ();
        login.onElement ("Login")
            .tap ();
    }
}