Android Open Source - Joetz-Android-V2 Login Fragment

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License

The source code is released under:
GNU General Public License
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Java Source Code

package com.example.jens.myapplication.account;
//w  w w. java2 s.c o  m

import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.TextView;

import com.example.jens.myapplication.R;
import com.example.jens.myapplication.apimanager.ApiConnection;
import com.example.jens.myapplication.apimanager.CancellableTask;
import com.example.jens.myapplication.apimanager.SimpleRequestTask;
import com.example.jens.myapplication.apimanager.manager.LoginManager;
import com.example.jens.myapplication.sam.JoetzApplication;
import com.example.jens.myapplication.sam.MyFragment;

/**
 * Fragment for Logging in
 */
public class LoginFragment extends MyFragment {

    private static final String ARG_DIALOG = "dialog";

    //If the fragment is shown as a dialog
    private boolean isDialog = false;

    private OnFragmentInteractionListener mListener;

    private CancellableTask loginTask = null;

    private LoginManager mLoginManager;

    private CheckBox mChkStayLoggedIn;

    private EditText mTxtEmail;
    private EditText mTxtPass;
    private TextView mTxtNoAccount;

    private Button mBtnLogin;
    private Button mBtnCancel;

    /**
     *
     * @param isDialog If the fragment is shown as a dialog (for cancel button), set to true
     * @return
     */
    public static LoginFragment newInstance(boolean isDialog){
        LoginFragment fragment = new LoginFragment();
        Bundle b = new Bundle();
        b.putBoolean(ARG_DIALOG, isDialog);
        fragment.setArguments(b);
        return fragment;
    }

    public static LoginFragment newInstance(){
        //Standard not as dialog
        return newInstance(false);
    }

    public LoginFragment() {
        // Required empty public constructor
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        //Retrieve data from arguments
        if(getArguments() != null && getArguments().containsKey(ARG_DIALOG)){
            isDialog = getArguments().getBoolean(ARG_DIALOG);
        }

        //Load login manager
        mLoginManager = JoetzApplication.getContext().getLoginManager();
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View rootView;

        //Load similar but different layout when its a dialog
        if(!isDialog){
            rootView = inflater.inflate(R.layout.fragment_login, container, false);
        }else{
            rootView = inflater.inflate(R.layout.fragment_login_dialog, container, false);
        }

        //Remember me button
        mChkStayLoggedIn = (CheckBox) rootView.findViewById(R.id.chkStayLoggedIn);

        mTxtEmail = (EditText) rootView.findViewById(R.id.txtEmail);
        mTxtPass = (EditText) rootView.findViewById(R.id.txtPass);
        mTxtNoAccount = (TextView) rootView.findViewById(R.id.txtNoAccount);

        mBtnLogin = (Button) rootView.findViewById(R.id.btnLogin);
        mBtnLogin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                login();
            }
        });

        mTxtNoAccount.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mListener.onGoRegister();
            }
        });

     /*   mBtnCancel = (Button) rootView.findViewById(R.id.btnRegisterOrCancel);
        if(isDialog){
            mBtnCancel.setText(R.string.cancel);
        }
        mBtnCancel.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mListener.onGoRegisterOrCancel();
            }
        });*/

        if(isDialog){
            mBtnCancel = (Button) rootView.findViewById(R.id.btnCancel);
            mBtnCancel.setVisibility(View.VISIBLE);
            mBtnCancel.setText(R.string.cancel);
            mBtnCancel.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    mListener.onLoginCancel();
                }
            });
        }

        return rootView;
    }

    /**
     * Perform the login
     *
     */
    private void login(){
        //Remove keyboard
        View v = getActivity().getCurrentFocus();

        if(v != null){
            InputMethodManager inputManager = (InputMethodManager) getActivity().getSystemService(Context.INPUT_METHOD_SERVICE);
            inputManager.hideSoftInputFromWindow(v.getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
        }

        if(loginTask != null){
            return;
        }

        String email = mTxtEmail.getText().toString();
        String password = mTxtPass.getText().toString();

        //email and pass should be filled in
        if(email == null || email.isEmpty()
                || password == null || password.isEmpty()){
            return;
        }

        //Disable buttons etc during request
        mTxtEmail.setEnabled(false);
        mTxtPass.setEnabled(false);
        mBtnLogin.setEnabled(false);

        //Progressdialog shown during request
        final ProgressDialog prgDialog = new ProgressDialog(getActivity());
        prgDialog.setMessage(getString(R.string.info_logging_in));
        prgDialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
            @Override
            public void onCancel(DialogInterface dialog) {
                if(loginTask != null){
                    loginTask.cancelTask();
                }
                loginTask = null;
                mTxtEmail.setEnabled(true);
                mTxtPass.setEnabled(true);
                mBtnLogin.setEnabled(true);
            }
        });

        //Task executed after login has finished
        SimpleRequestTask postTask = new SimpleRequestTask() {
            @Override
            public void doTask(int statusCode) {
                prgDialog.dismiss();
                loginTask = null;
                String authKey = mLoginManager.getAuthKey();
                mTxtEmail.setEnabled(true);
                mTxtPass.setEnabled(true);
                mBtnLogin.setEnabled(true);

                if(authKey == null){
                //Show informative error message
                    String msg;
                    if(statusCode < 0){
                        msg = getString(R.string.error_connection_failed);
                    }else{
                        switch(statusCode){
                            case ApiConnection.STATUS_UNAUTHORIZED:
                                msg = getString(R.string.error_wrong_login); break;
                            default:
                                msg = getString(R.string.error_unknown);
                        }
                    }

                    new AlertDialog.Builder(getActivity())
                            .setMessage(msg)
                            .setNeutralButton(R.string.ok, null)
                            .create().show();
                }
                else{
                    onLoginFinished();
                }
            }
        };

        //Send login request. When returned, will call postTask's doTask()
        loginTask = mLoginManager.login(mTxtEmail.getText().toString(), mTxtPass.getText().toString(),
                postTask, mChkStayLoggedIn.isChecked());
        prgDialog.show();
    }

    private void onLoginFinished(){
        mListener.onLoginFinished();
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        try {
            mListener = (OnFragmentInteractionListener) activity;
        } catch (ClassCastException e) {
            throw new ClassCastException(activity.toString()
                    + " must implement OnFragmentInteractionListener");
        }
    }

    @Override
    public void onDetach() {
        super.onDetach();
        mListener = null;
    }

    @Override
    public void onPause() {
        super.onPause();
        if(loginTask != null){
            loginTask.cancelTask();
        }
    }

    public interface OnFragmentInteractionListener {
        public void onLoginFinished();
        public void onGoRegister();
        public void onLoginCancel();
    }


}
Java Source Code List
