Android Open Source - AndroIUT Login Activity

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Back to project page AndroIUT.

License

The source code is released under:

GNU General Public License

Java Source Code

package com.iutdijon.androiut2.iut.activities;
/* w  w  w  .j  a va  2s . co m*/
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.View;
import android.view.Window;
import android.view.inputmethod.EditorInfo;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.TextView;

import com.iutdijon.androiut2.R;
import com.iutdijon.androiut2.global.AndroIUTApplication;
import com.iutdijon.androiut2.iut.data.Credential;
import com.iutdijon.androiut2.iut.data.account.UserAccount;
import com.iutdijon.androiut2.iut.services.IUTLoginServiceCall;
import com.iutdijon.androiut2.util.AndroIUTLogger;
import com.iutdijon.androiut2.util.IOUtils;
import com.iutdijon.androiut2.util.PreferencesManager;
import com.iutdijon.androiut2.util.UIUtil;

/**
 * Activity which displays a login screen to the user, offering registration as
 * well.
 */
public class LoginActivity extends Activity {

  public static final String EXTRA_EMAIL = "Login";

  
  /**
   * Keep track of the login task to ensure we can cancel it if requested.
   */
  private IUTLoginServiceCall mAuthTask = null;

  // Values for email and password at the time of the login attempt.
  private String mLogin;
  private String mPassword;
  // UI references.
  private EditText mLoginView;
  private EditText mPasswordView;
  private TextView mLoginStatusMessageView;
  private CheckBox mRemberPassword;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    
    this.requestWindowFeature(Window.FEATURE_NO_TITLE);
    
    setContentView(R.layout.activity_login);
    PreferencesManager.getInstance().init(getApplicationContext());
    
    //AndroIUTLogger logger = new AndroIUTLogger(getApplicationContext());
    new AndroIUTLogger(getApplicationContext());
        
    if(!IOUtils.isOnline(this)){
      UIUtil.showMessage(this, R.string.must_have_network_connection);
    }
    
    mRemberPassword = (CheckBox) findViewById(R.id.remember_password_opt);
    mRemberPassword.setChecked(PreferencesManager.getInstance().getBoolean(PreferencesManager.REMEMBER_ME_CHECKBOX_VAL));
    
    // Set up the login form.
    mLoginView = (EditText) findViewById(R.id.login);
        
    mLogin = PreferencesManager.getInstance().getString(PreferencesManager.REMEMBER_ME_OPTION);
    mLoginView.setText(mLogin);

    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;
          }
        });

    mPassword = PreferencesManager.getInstance().getString(PreferencesManager.REMEMBER_ME_PASSWORD);
    mPasswordView.setText(mPassword);
    
    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();
        }
      });
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    super.onCreateOptionsMenu(menu);
    getMenuInflater().inflate(R.menu.activity_login, menu);
    return true;
  }

  /**
   * 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;
    }

    if(!IOUtils.isOnline(this)){
      UIUtil.showMessage(this, R.string.must_have_network_connection);
      return;
    }
    
    // Reset errors.
    mLoginView.setError(null);
    mPasswordView.setError(null);

    // Store values at the time of the login attempt.
    mLogin = mLoginView.getText().toString();
    mPassword = mPasswordView.getText().toString();

    boolean cancel = false;
    View focusView = null;

    // Check for a valid password.
    if (TextUtils.isEmpty(mPassword)) {
      mPasswordView.setError(getString(R.string.error_field_required));
      focusView = mPasswordView;
      cancel = true;
    } else if (mPassword.length() < 4) {
      mPasswordView.setError(getString(R.string.error_invalid_password));
      focusView = mPasswordView;
      cancel = true;
    }

    if (TextUtils.isEmpty(mLogin)) {
      mLoginView.setError(getString(R.string.error_field_required));
      focusView = mLoginView;
      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);
      
      new IUTLoginServiceCall(this){
        @Override
        protected void onPostRun(UserAccount token) {
          if(token != null){
            AndroIUTApplication.getInstance().setUser(token);
            if(mRemberPassword.isChecked()){
              PreferencesManager.getInstance().setString(PreferencesManager.REMEMBER_ME_PASSWORD, (token.getPassword()));
            }else{
              PreferencesManager.getInstance().setString(PreferencesManager.REMEMBER_ME_PASSWORD, "");
            }
            PreferencesManager.getInstance().setBoolean(PreferencesManager.REMEMBER_ME_CHECKBOX_VAL, mRemberPassword.isChecked());
            Intent home_intent = new Intent(LoginActivity.this, HomeActivity.class);
            startActivity(home_intent);
          }else{
            UIUtil.showMessage(LoginActivity.this, getString(R.string.invalid_credential));
          }
        }
      }.execute(new Credential(mLogin, mPassword));
    }
  }
}

Java Source Code List

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