Android Open Source - Android-SDK-Demo Login Activity

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License

The source code is released under:

Apache License

Java Source Code

package com.baasbox.demo;
//from w ww  .j a v a 2 s . c  om
import com.baasbox.android.BaasClientException;
import com.baasbox.android.BaasException;
import com.baasbox.android.BaasResult;
import com.baasbox.android.BaasServerException;
import com.baasbox.android.BaasUser;
import com.baasbox.demo.util.AlertUtils;

import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Intent;

public class LoginActivity extends Activity {

  private LoginTask loginTask;
  
  private EditText usernameEditText;
  private EditText passwordEditText;
  private Button loginButton;

  @SuppressWarnings("static-access")
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    
    if ( BaasUser.current().isAuthentcated()) {
      onUserLogged();
      return;
    }
    
    setTitle("Login");
    
    setContentView(R.layout.activity_login);
    
    usernameEditText = (EditText) findViewById(R.id.username);
    passwordEditText = (EditText) findViewById(R.id.password);
    loginButton = (Button) findViewById(R.id.loginButton);
    
    loginButton.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        String username = usernameEditText.getText().toString();
        String password = passwordEditText.getText().toString();
        
        onClickLogin(username, password);
      }
    });
    
    findViewById(R.id.signupLink).setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        onClickSignup();
      }
    });
  }
  
  private void onUserLogged() {
    Intent intent = new Intent(this, AddressBookActivity.class);
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    startActivity(intent);
    
    finish();
  }
  
  protected void onClickSignup() {
    Intent intent = new Intent(this, SignupActivity.class);
    startActivity(intent);
  }
  
  protected void onClickLogin(String username, String password) {
    loginTask = new LoginTask();
    loginTask.execute(username, password);
  }

  protected void onLogin(BaasResult<BaasUser> result) {
    try {
      result.get();
      onUserLogged();
    } catch (BaasClientException e) {
      if (e.httpStatus == 401) {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setCancelable(true);
        builder.setTitle("Login failed");
        builder.setMessage("Invalid username or password");
        builder.setNegativeButton("Cancel", null);
        builder.create().show();
      } else {
        AlertUtils.showErrorAlert(this, e);
      }
    } catch (BaasServerException e) {
      AlertUtils.showErrorAlert(this, e);
    } catch (BaasException e) {
      AlertUtils.showErrorAlert(this, e);
    }
  }

  public class LoginTask extends AsyncTask<String, Void, BaasResult<BaasUser>> {
    
    @Override
    protected void onPreExecute() {
      loginButton.setEnabled(false);
    }
    
    @Override
    protected BaasResult<BaasUser> doInBackground(String... params) {
      BaasUser user = BaasUser.withUserName(params[0]);
      user.setPassword(params[1]);
      return user.loginSync();
    }

    @Override
    protected void onPostExecute(BaasResult<BaasUser> result) {
      loginButton.setEnabled(true);
      onLogin(result);
    }
  }

}

Java Source Code List

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