Android Open Source - SurveySDK_android Login Activity

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License

The source code is released under:

Apache License

Java Source Code

package com.survey.androiddemo;
//from  w  ww  .  j a  v  a2s . c  o  m
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.inputmethod.EditorInfo;
import android.widget.ArrayAdapter;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
import com.survey.android.session.Session;

/**
 * Activity which displays a login screen to the user, offering registration as
 * well.
 */
public class LoginActivity extends Activity {
  /**
   * Keep track of the login task to ensure we can cancel it if requested.
   */
  private UserLoginTask mAuthTask = null;

  // Values for email and password at the time of the login attempt.
  private String mEmail;
  private String mPassword;
  private String mFirstName;
  private String mLastName;
  private String mBirthDate;
  private boolean mGender;

  // UI references.
  private View mLoginFormView;
  private View mLoginStatusView;
  private TextView mLoginStatusMessageView;
  private EditText mEmailView;
  private EditText mPasswordView;
  private EditText mFirstNameView;
  private EditText mLastNameView;
  
  private Spinner gender;
  private DatePicker age;  
  
  ArrayAdapter<String> adapter;
  
  Context context;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_login);
    
    context = this;
    
    gender = (Spinner) findViewById(R.id.spinner1);
    age = (DatePicker) findViewById(R.id.datePicker1);
    age.clearChildFocus(getCurrentFocus());
    
    adapter = new ArrayAdapter<String>(LoginActivity.this,
        android.R.layout.simple_spinner_item, getResources().getStringArray(R.array.genders_array));
    adapter.setDropDownViewResource(R.layout.multiline_spinner_dropdown_item);
    gender.setAdapter(adapter);

    mEmailView = (EditText) findViewById(R.id.email);
    mFirstNameView = (EditText) findViewById(R.id.first_name);
    mLastNameView = (EditText) findViewById(R.id.last_name);

    mPasswordView = (EditText) findViewById(R.id.password);
    mPasswordView
        .setOnEditorActionListener(new TextView.OnEditorActionListener() {
          @Override
          public boolean onEditorAction(TextView textView, int id,
              KeyEvent keyEvent) {
            if (id == R.id.login || id == EditorInfo.IME_NULL) {
              attemptLogin();
              return true;
            }
            return false;
          }
        });

    mLoginFormView = findViewById(R.id.login_form);
    mLoginStatusView = findViewById(R.id.login_status);
    mLoginStatusMessageView = (TextView) findViewById(R.id.login_status_message);

    findViewById(R.id.sign_in_button).setOnClickListener(
        new View.OnClickListener() {
          @Override
          public void onClick(View view) {
            attemptLogin();
          }
        });
  }
  
  /**
   * Attempts to sign in or register the account specified by the login form.
   * If there are form errors (invalid email, missing fields, etc.), the
   * errors are presented and no actual login attempt is made.
   */
  public void attemptLogin() {
    if (mAuthTask != null) {
      return;
    }

    // Reset errors.
    mEmailView.setError(null);
    mPasswordView.setError(null);
    mFirstNameView.setError(null);
    mLastNameView.setError(null);

    // Store values at the time of the login attempt.
    mEmail = mEmailView.getText().toString();
    if (mPasswordView.getVisibility() == View.GONE) {
      mPassword = "";
    } else {
      mPassword = mPasswordView.getText().toString();
    }
    mFirstName = mFirstNameView.getText().toString();
    mLastName = mLastNameView.getText().toString();

    boolean cancel = false;
    View focusView = null;
    
    mBirthDate = getStringDate();
    mGender = getBooleanGender();

    // Check for a valid email address.
    if (TextUtils.isEmpty(mEmail)) {
      mEmailView.setError(getString(R.string.error_field_required));
      focusView = mEmailView;
      cancel = true;
    } else if (!mEmail.contains("@")) {
      mEmailView.setError(getString(R.string.error_invalid_email));
      focusView = mEmailView;
      cancel = true;
    }
    
    if(TextUtils.isEmpty(mFirstName)){
      mFirstNameView.setError(getString(R.string.error_field_required));
      focusView = mFirstNameView;
      cancel = true;
    } 
    if(TextUtils.isEmpty(mLastName)){
      mLastNameView.setError(getString(R.string.error_field_required));
      focusView = mLastNameView;
      cancel = true;
    }
    
    if (cancel) {
      // There was an error; don't attempt login and focus the first
      // form field with an error.
      focusView.requestFocus();
    } else {
      // Show a progress spinner, and kick off a background task to
      // perform the user login attempt.
      mLoginStatusMessageView.setText(R.string.login_progress_signing_in);
      showProgress(true);
      mAuthTask = new UserLoginTask();
      mAuthTask.execute((Void) null);
    }
    
  }
  
  private String getStringDate() {
    if (age.getVisibility() == View.GONE) {
      return "";
    } else {
      return String.valueOf(age.getDayOfMonth()) + "-"
        + String.valueOf(age.getMonth() + 1) + "-"
        + String.valueOf(age.getYear());
    }
  }
  
  private boolean getBooleanGender(){
    return gender.getSelectedItemPosition() == 0 ? true:false;
  }

  /**
   * Shows the progress UI and hides the login form.
   */
  @TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
  private void showProgress(final boolean show) {
    // On Honeycomb MR2 we have the ViewPropertyAnimator APIs, which allow
    // for very easy animations. If available, use these APIs to fade-in
    // the progress spinner.
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
      int shortAnimTime = getResources().getInteger(
          android.R.integer.config_shortAnimTime);

      mLoginStatusView.setVisibility(View.VISIBLE);
      mLoginStatusView.animate().setDuration(shortAnimTime)
          .alpha(show ? 1 : 0)
          .setListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
              mLoginStatusView.setVisibility(show ? View.VISIBLE
                  : View.GONE);
            }
          });

      mLoginFormView.setVisibility(View.VISIBLE);
      mLoginFormView.animate().setDuration(shortAnimTime)
          .alpha(show ? 0 : 1)
          .setListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
              mLoginFormView.setVisibility(show ? View.GONE
                  : View.VISIBLE);
            }
          });
    } else {
      // The ViewPropertyAnimator APIs are not available, so simply show
      // and hide the relevant UI components.
      mLoginStatusView.setVisibility(show ? View.VISIBLE : View.GONE);
      mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE);
    }
  }

  /**
   * Represents an asynchronous login/registration task used to authenticate
   * the user.
   */
  public class UserLoginTask extends AsyncTask<Void, Void, Boolean> {
    @Override
    protected Boolean doInBackground(Void... params) {
      Session session = new Session(getApplicationContext());
      boolean logIn = session.logIn(mEmail, mFirstName, mLastName, SDKConfigSettings.ORGANIZATION_ID);
      Log.i("Session active: ", String.valueOf(logIn));
      return logIn;
    }

    @Override
    protected void onPostExecute(final Boolean success) {
      mAuthTask = null;
      showProgress(false);

      if (success) {
        // launch Main activity
        Intent intent = new Intent(LoginActivity.this, MainActivity.class);
        startActivity(intent);
        finish();
      } else {
        Toast.makeText(context, "Login failed. Please try again", Toast.LENGTH_SHORT).show();
      }
    }

    @Override
    protected void onCancelled() {
      mAuthTask = null;
      showProgress(false);
    }
  }
}

Java Source Code List

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