Remove unneeded code from LoginActivity

app/src/main/java/com/testapp/LoginActivity.java

@@ -4,27 +4,15 @@ import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.annotation.TargetApi;
 import android.content.Intent;
-import android.content.pm.PackageManager;
-import android.support.annotation.NonNull;
-import android.support.design.widget.Snackbar;
-import android.support.v7.app.AppCompatActivity;
-import android.app.LoaderManager.LoaderCallbacks;
-
-import android.content.CursorLoader;
-import android.content.Loader;
-import android.database.Cursor;
-import android.net.Uri;
 import android.os.AsyncTask;
-
 import android.os.Build;
 import android.os.Bundle;
-import android.provider.ContactsContract;
+import android.support.v7.app.AppCompatActivity;
 import android.text.TextUtils;
 import android.view.KeyEvent;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.inputmethod.EditorInfo;
-import android.widget.ArrayAdapter;
 import android.widget.AutoCompleteTextView;
 import android.widget.Button;
 import android.widget.EditText;
@@ -33,40 +21,14 @@ import android.widget.Toast;
 
 import com.testapp.entities.Token;
 
-import java.util.ArrayList;
-import java.util.List;
-
 import retrofit2.Call;
 import retrofit2.Callback;
 import retrofit2.Response;
 
-import static android.Manifest.permission.READ_CONTACTS;
-
-/**
- * A login screen that offers login via email/password.
- */
-public class LoginActivity extends AppCompatActivity implements LoaderCallbacks<Cursor> {
-
-    public static final String EXTRA_MESSAGE = "com.testapp.MESSAGE";
-
-    /**
-     * Id to identity READ_CONTACTS permission request.
-     */
-    private static final int REQUEST_READ_CONTACTS = 0;
-
-    /**
-     * A dummy authentication store containing known user names and passwords.
-     * TODO: remove after connecting to a real authentication system.
-     */
-    private static final String[] DUMMY_CREDENTIALS = new String[]{
-            "foo@example.com:hello", "bar@example.com:world"
-    };
-    /**
-     * Keep track of the login task to ensure we can cancel it if requested.
-     */
+public class LoginActivity extends AppCompatActivity {
+
     private UserLoginTask mAuthTask = null;
 
-    // UI references.
     private AutoCompleteTextView mUsernameView;
     private EditText mPasswordView;
     private View mProgressView;
@@ -76,9 +38,6 @@ public class LoginActivity extends AppCompatActivity implements LoaderCallbacks<
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_login);
-        // Set up the login form.
-        // mEmailView = (AutoCompleteTextView) findViewById(R.id.email);
-        // populateAutoComplete();
 
         mUsernameView = (AutoCompleteTextView) findViewById(R.id.username);
 
@@ -110,106 +69,35 @@ public class LoginActivity extends AppCompatActivity implements LoaderCallbacks<
             }
         });
 
-        Button sampleDishButton = (Button) findViewById(R.id.sample_dish);
-        sampleDishButton.setOnClickListener(new OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                sampleDish();
-            }
-        });
-
-        Button sampleStallButton = (Button) findViewById(R.id.sample_stall);
-        sampleStallButton.setOnClickListener(new OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                sampleStall();
-            }
-        });
-
         mLoginFormView = findViewById(R.id.login_form);
         mProgressView = findViewById(R.id.login_progress);
     }
 
-    public void sampleStall() {
-
-        Intent intent = new Intent(this, StallViewActivity.class);
-        startActivity(intent);
-    }
-
-    public void sampleDish() {
-
-        Intent intent = new Intent(this, DishViewActivity.class);
-        startActivity(intent);
-    }
-
     public void guestLogin() {
-
         Intent intent = new Intent(this, NavDrawerActivity.class);
-        intent.putExtra(EXTRA_MESSAGE, "Signed in as guest");
         startActivity(intent);
     }
 
-    private void populateAutoComplete() {
-        if (!mayRequestContacts()) {
-            return;
-        }
-
-        getLoaderManager().initLoader(0, null, this);
-    }
-
-    private boolean mayRequestContacts() {
-        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
-            return true;
-        }
-        if (checkSelfPermission(READ_CONTACTS) == PackageManager.PERMISSION_GRANTED) {
-            return true;
-        }
-        return false;
-    }
-
-    /**
-     * Callback received when a permissions request has been completed.
-     */
-    @Override
-    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
-                                           @NonNull int[] grantResults) {
-        if (requestCode == REQUEST_READ_CONTACTS) {
-            if (grantResults.length == 1 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
-                populateAutoComplete();
-            }
-        }
-    }
-
-
-    /**
-     * 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.
-     */
     private void attemptLogin() {
         if (mAuthTask != null) {
             return;
         }
 
-        // Reset errors.
         mUsernameView.setError(null);
         mPasswordView.setError(null);
 
-        // Store values at the time of the login attempt.
         String username = mUsernameView.getText().toString();
         String password = mPasswordView.getText().toString();
 
         boolean cancel = false;
         View focusView = null;
 
-        // Check for a valid password, if the user entered one.
-        if (!TextUtils.isEmpty(password) && !isPasswordValid(password)) {
+        if (!TextUtils.isEmpty(password)) {
             mPasswordView.setError(getString(R.string.error_invalid_password));
             focusView = mPasswordView;
             cancel = true;
         }
 
-        // Check for a valid email address.
         if (TextUtils.isEmpty(username)) {
             mUsernameView.setError(getString(R.string.error_field_required));
             focusView = mUsernameView;
@@ -217,40 +105,19 @@ public class LoginActivity extends AppCompatActivity implements LoaderCallbacks<
         }
 
         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.
             showProgress(true);
             mAuthTask = new UserLoginTask(username, password);
             mAuthTask.execute((Void) null);
 
             Intent intent = new Intent(this, NavDrawerActivity.class);
-            intent.putExtra(EXTRA_MESSAGE, "Signed in successfully");
             startActivity(intent);
         }
     }
 
-    private boolean isEmailValid(String email) {
-        //TODO: Replace this with your own logic
-        return email.contains("@");
-    }
-
-    private boolean isPasswordValid(String password) {
-        //TODO: Replace this with your own logic
-        return password.length() > 4;
-    }
-
-    /**
-     * 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);
 
@@ -272,67 +139,11 @@ public class LoginActivity extends AppCompatActivity implements LoaderCallbacks<
                 }
             });
         } else {
-            // The ViewPropertyAnimator APIs are not available, so simply show
-            // and hide the relevant UI components.
             mProgressView.setVisibility(show ? View.VISIBLE : View.GONE);
             mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE);
         }
     }
 
-    @Override
-    public Loader<Cursor> onCreateLoader(int i, Bundle bundle) {
-        return new CursorLoader(this,
-                // Retrieve data rows for the device user's 'profile' contact.
-                Uri.withAppendedPath(ContactsContract.Profile.CONTENT_URI,
-                        ContactsContract.Contacts.Data.CONTENT_DIRECTORY), ProfileQuery.PROJECTION,
-
-                // Select only email addresses.
-                ContactsContract.Contacts.Data.MIMETYPE +
-                        " = ?", new String[]{ContactsContract.CommonDataKinds.Email
-                .CONTENT_ITEM_TYPE},
-
-                // Show primary email addresses first. Note that there won't be
-                // a primary email address if the user hasn't specified one.
-                ContactsContract.Contacts.Data.IS_PRIMARY + " DESC");
-    }
-
-    @Override
-    public void onLoadFinished(Loader<Cursor> cursorLoader, Cursor cursor) {
-        List<String> emails = new ArrayList<>();
-        cursor.moveToFirst();
-        while (!cursor.isAfterLast()) {
-            emails.add(cursor.getString(ProfileQuery.ADDRESS));
-            cursor.moveToNext();
-        }
-
-        addEmailsToAutoComplete(emails);
-    }
-
-    @Override
-    public void onLoaderReset(Loader<Cursor> cursorLoader) {
-
-    }
-
-    private void addEmailsToAutoComplete(List<String> emailAddressCollection) {
-        //Create adapter to tell the AutoCompleteTextView what to show in its dropdown list.
-        ArrayAdapter<String> adapter =
-                new ArrayAdapter<>(LoginActivity.this,
-                        android.R.layout.simple_dropdown_item_1line, emailAddressCollection);
-
-        mUsernameView.setAdapter(adapter);
-    }
-
-
-    private interface ProfileQuery {
-        String[] PROJECTION = {
-                ContactsContract.CommonDataKinds.Email.ADDRESS,
-                ContactsContract.CommonDataKinds.Email.IS_PRIMARY,
-        };
-
-        int ADDRESS = 0;
-        int IS_PRIMARY = 1;
-    }
-
     public class UserLoginTask extends AsyncTask<Void, Void, Boolean> {
 
         private final String mUsername;
@@ -382,4 +193,3 @@ public class LoginActivity extends AppCompatActivity implements LoaderCallbacks<
         }
     }
 }
-