Android Open Source - android.bigredsnapshot Login Activity

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License

The source code is released under:
MIT License
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Java Source Code

package io.evercam.bigredsnapshot;
/*from   w w  w.  j av  a 2 s.  c  om*/
import com.bugsense.trace.BugSenseHandler;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.text.SpannableString;
import android.text.TextUtils;
import android.text.style.UnderlineSpan;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.View;
import android.view.Window;
import android.view.View.OnClickListener;
import android.view.inputmethod.EditorInfo;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import io.evercam.*;
import io.evercam.bigredsnapshot.helper.CustomedDialog;
import io.evercam.bigredsnapshot.helper.PrefsManager;
import io.evercam.bigredsnapshot.helper.PropertyReader;
import io.evercam.bigredsnapshot.tasks.CheckInternetTask;

public class LoginActivity extends Activity
{
  private UserLoginTask loginTask = null;

  private String username;
  private String password;
  private SharedPreferences sharedPrefs;

  private EditText usernameView;
  private EditText passwordView;
  private View loginFormView;
  private View loginStatusView;
  private TextView loginStatusMessageView;
  private TextView signUpLink;
  private PropertyReader propertyReader;

  @Override
  protected void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    sharedPrefs = PreferenceManager.getDefaultSharedPreferences(LoginActivity.this);
    requestWindowFeature(Window.FEATURE_NO_TITLE);

    /* BugSense */
    propertyReader = new PropertyReader(getApplicationContext());
    if (propertyReader.isPropertyExist(PropertyReader.KEY_BUG_SENSE))
    {
      String bugSenseCode = propertyReader.getPropertyStr(PropertyReader.KEY_BUG_SENSE);
      BugSenseHandler.initAndStartSession(LoginActivity.this, bugSenseCode);
    }

    new CheckInternetTaskLogin(LoginActivity.this).execute();
  }

  @Override
  protected void onStart()
  {
    super.onStart();

    if (propertyReader.isPropertyExist(PropertyReader.KEY_BUG_SENSE))
    {
      BugSenseHandler.startSession(this);
    }
  }

  @Override
  protected void onStop()
  {
    super.onStop();

    if (propertyReader.isPropertyExist(PropertyReader.KEY_BUG_SENSE))
    {
      BugSenseHandler.closeSession(this);
    }
  }

  @Override
  protected void onRestart()
  {
    super.onRestart();
    new CheckInternetTaskLogin(LoginActivity.this).execute();
  }

  private void setUpPage()
  {
    setContentView(R.layout.activity_login);
    if (isUserLogged(sharedPrefs))
    {
      startChooseCamera();
    }
    else
    {
      BigRedSnapshot.sendScreenAnalytics(this, getString(R.string.screen_login));
    }

    setDeveloperKeyPair();

    setUnderLine();
    usernameView = (EditText) findViewById(R.id.email);
    passwordView = (EditText) findViewById(R.id.password);
    passwordView.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;
      }
    });

    loginFormView = findViewById(R.id.login_form);
    loginStatusView = findViewById(R.id.login_status);
    loginStatusMessageView = (TextView) findViewById(R.id.login_status_message);

    findViewById(R.id.sign_in_button).setOnClickListener(new View.OnClickListener(){
      @Override
      public void onClick(View view)
      {
        attemptLogin();
      }
    });

    signUpLink.setOnClickListener(new OnClickListener(){

      @Override
      public void onClick(View v)
      {
        Intent signupIntent = new Intent();
        signupIntent.setClass(LoginActivity.this, SignUpActivity.class);
        startActivity(signupIntent);
      }
    });
  }

  public void attemptLogin()
  {
    if (loginTask != null)
    {
      return;
    }

    usernameView.setError(null);
    passwordView.setError(null);

    username = usernameView.getText().toString();
    password = passwordView.getText().toString();

    boolean cancel = false;
    View focusView = null;

    if (TextUtils.isEmpty(password))
    {
      passwordView.setError(getString(R.string.error_field_required));
      focusView = passwordView;
      cancel = true;
    }
    else if (password.contains(" "))
    {
      passwordView.setError(getString(R.string.invalid_password));
      focusView = passwordView;
      cancel = true;
    }

    if (TextUtils.isEmpty(username))
    {
      usernameView.setError(getString(R.string.error_field_required));
      focusView = usernameView;
      cancel = true;
    }
    else if (username.contains(" "))
    {
      usernameView.setError(getString(R.string.invalid_username));
      focusView = usernameView;
      cancel = true;
    }
    else if (username.length() < 3)
    {
      usernameView.setError(getString(R.string.username_too_short));
      focusView = usernameView;
      cancel = true;
    }

    if (cancel)
    {
      focusView.requestFocus();
    }
    else
    {
      loginStatusMessageView.setText(R.string.login_progress_signing_in);
      showProgress(true);
      loginTask = new UserLoginTask();
      loginTask.execute((Void) null);
    }
  }

  private void showProgress(final boolean show)
  {
    loginStatusView.setVisibility(show ? View.VISIBLE : View.GONE);
    loginFormView.setVisibility(show ? View.GONE : View.VISIBLE);
  }

  public class UserLoginTask extends AsyncTask<Void, Void, Boolean>
  {
    String errorMessage = "UserLoginTaskError";

    @Override
    protected Boolean doInBackground(Void... params)
    {
      try
      {
        ApiKeyPair userKeyPair = API.requestUserKeyPairFromEvercam(username, password);
        String userApiKey = userKeyPair.getApiKey();
        String userApiId = userKeyPair.getApiId();
        PrefsManager.saveEvercamUserKeyPair(sharedPrefs, userApiKey, userApiId);
        API.setUserKeyPair(userApiKey, userApiId);
        User evercamUser = new User(username);
        PrefsManager.saveEvercamCredential(sharedPrefs, evercamUser, password);
        return true;
      }
      catch (EvercamException e)
      {
        errorMessage = e.getMessage();
      }
      return false;
    }

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

      if (success)
      {
        startChooseCamera();
      }
      else
      {
        Toast toast = Toast.makeText(getApplicationContext(), errorMessage,
            Toast.LENGTH_SHORT);
        toast.setGravity(Gravity.CENTER, 0, 0);
        toast.show();
        passwordView.setText(null);
      }
    }

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

  public static boolean isUserLogged(SharedPreferences sharedPrefs)
  {
    String savedUsername = sharedPrefs.getString(PrefsManager.KEY_USER_NAME, null);
    if (savedUsername != null)
    {
      return true;
    }
    return false;
  }

  private void startChooseCamera()
  {
    Intent intentMain = new Intent();
    intentMain.setClass(LoginActivity.this, ChooseCameraActivity.class);
    startActivity(intentMain);
  }

  @Override
  public void onBackPressed()
  {
    Intent backIntent = new Intent();
    backIntent.setClass(LoginActivity.this, SlideActivity.class);
    startActivity(backIntent);
  }

  private void setUnderLine()
  {
    signUpLink = (TextView) findViewById(R.id.signupLink);
    SpannableString spanString = new SpannableString(this.getResources().getString(
        R.string.create_account));
    spanString.setSpan(new UnderlineSpan(), 0, spanString.length(), 0);
    signUpLink.setText(spanString);
  }

  private void setDeveloperKeyPair()
  {
    PropertyReader propertyReader = new PropertyReader(getApplicationContext());
    String developerAppKey = propertyReader.getPropertyStr(PropertyReader.KEY_API_KEY);
    String developerAppId = propertyReader.getPropertyStr(PropertyReader.KEY_API_ID);
    API.setDeveloperKeyPair(developerAppKey, developerAppId);
  }

  private class CheckInternetTaskLogin extends CheckInternetTask
  {
    public CheckInternetTaskLogin(Context context)
    {
      super(context);
    }

    @Override
    protected void onPostExecute(Boolean hasNetwork)
    {
      if (hasNetwork)
      {
        setUpPage();
      }
      else
      {
        CustomedDialog.getNoInternetDialog(LoginActivity.this).show();
      }
    }
  }
}
Java Source Code List
