Login para android faltan las librerias

/** * Author: Juan Carlos Patiño * URL: www.yaposoftware.com * twitter: http://twitter.com/jcpatio * */ package com.example.yamotox; import java.util.HashMap; import org.json.JSONException; import org.json.JSONObject; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.os.Vibrator; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast; import com.example.yamotox.library.DatabaseHandler; import com.example.yamotox.library.UserFunctions; public class LoginActivity extends Activity { Button btnLogin; Button btnLinkToRegister; EditText inputEmail; EditText inputPassword; TextView loginErrorMsg; // JSON Response node names private static String KEY_SUCCESS = "success"; private static String KEY_ERROR = "error"; private static String KEY_ERROR_MSG = "error_msg"; private static String KEY_UID = "uid"; private static String KEY_NAME = "name"; private static String KEY_EMAIL = "email"; private static String KEY_CREATED_AT = "created_at"; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.login); // Importing all assets like buttons, text fields inputEmail = (EditText) findViewById(R.id.loginEmail); inputPassword = (EditText) findViewById(R.id.loginPassword); btnLogin = (Button) findViewById(R.id.btnLogin); btnLinkToRegister = (Button) findViewById(R.id.btnLinkToRegisterScreen); loginErrorMsg = (TextView) findViewById(R.id.login_error); // Login button Click Event btnLogin.setOnClickListener(new View.OnClickListener() { public void onClick(View view) { String email = inputEmail.getText().toString(); String password = inputPassword.getText().toString(); UserFunctions userFunction = new UserFunctions(); Log.d("Button", "Login"); JSONObject json = userFunction.loginUser(email, password); // chequeamos el login jcp try { if (json.getString(KEY_SUCCESS) != null) { loginErrorMsg.setText(""); String res = json.getString(KEY_SUCCESS); if (Integer.parseInt(res) == 1) { // user successfully logged in // Store user details in SQLite Database DatabaseHandler db = new DatabaseHandler( getApplicationContext()); JSONObject json_user = json.getJSONObject("user"); // Clear all previous data in database userFunction.logoutUser(getApplicationContext()); db.addUser(json_user.getString(KEY_NAME), json_user.getString(KEY_EMAIL), json.getString(KEY_UID), json_user.getString(KEY_CREATED_AT)); // Launch Dashboard Screen Intent dashboard = new Intent( getApplicationContext(), DashboardActivity.class); // Close all views before launching Dashboard dashboard.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivity(dashboard); // Close Login Screen finish(); } else { // Error in login // loginErrorMsg // .setText("Incorrect username/password"); // si detecto un error en la primera validacion // vibrar y mostrar un Toast con un mensaje de // error. err_login(); } } } catch (JSONException e) { e.printStackTrace(); } } private void err_login() { Vibrator vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE); vibrator.vibrate(200); Toast toast1 = Toast.makeText(getApplicationContext(), "Error:Nombre de usuario o password incorrectos", Toast.LENGTH_SHORT); toast1.show(); } }); // Link to Register Screen btnLinkToRegister.setOnClickListener(new View.OnClickListener() { public void onClick(View view) { Intent i = new Intent(getApplicationContext(), RegisterActivity.class); startActivity(i); finish(); } }); } }