edu.scu.userinterface.RegistrationActivity.java Source code

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Here is the source code for edu.scu.userinterface.RegistrationActivity.java

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/**
 * Copyright 2015 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package edu.scu.userinterface;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v4.content.LocalBroadcastManager;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GoogleApiAvailability;

import java.util.regex.Pattern;

public class RegistrationActivity extends AppCompatActivity {

    private static final int PLAY_SERVICES_RESOLUTION_REQUEST = 9000;
    private static final String TAG = "RegistrationActivity";

    private BroadcastReceiver mRegistrationBroadcastReceiver;
    private ProgressBar mRegistrationProgressBar;
    private EditText emailid;
    private EditText password;
    private Button registerBtn;
    private boolean isReceiverRegistered;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_registration);

        emailid = (EditText) findViewById(R.id.emailid);
        password = (EditText) findViewById(R.id.password);
        mRegistrationProgressBar = (ProgressBar) findViewById(R.id.registrationProgressBar);
        mRegistrationBroadcastReceiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                mRegistrationProgressBar.setVisibility(ProgressBar.GONE);
                SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
                boolean sentToken = sharedPreferences.getBoolean(AppPreferences.SENT_TOKEN_TO_SERVER, false);
                if (sentToken) {
                    Toast.makeText(RegistrationActivity.this, getString(R.string.gcm_send_message),
                            Toast.LENGTH_LONG);
                    Intent loginIntent = new Intent(RegistrationActivity.this, LoginActivity.class);
                    startActivity(loginIntent);
                } else {
                    Toast.makeText(RegistrationActivity.this, getString(R.string.token_error_message),
                            Toast.LENGTH_LONG);
                }
            }
        };

        registerBtn = (Button) findViewById(R.id.registerBtn);
        registerBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (validateUserInput() && checkPlayServices()) {
                    // Start IntentService to register this application with GCM.
                    Intent intent = new Intent(RegistrationActivity.this, RegistrationIntentService.class);
                    intent.putExtra("email", emailid.getText().toString().trim());
                    intent.putExtra("password", password.getText().toString().trim());
                    mRegistrationProgressBar.setVisibility(ProgressBar.VISIBLE);
                    startService(intent);
                }
            }
        });

        // Registering BroadcastReceiver
        registerReceiver();
    }

    private boolean validateUserInput() {
        String email = emailid.getText().toString().trim();
        String pwd = password.getText().toString().trim();
        Boolean valid = true;

        if (TextUtils.isEmpty(email) || !android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches()) {
            emailid.setError("Enter a valid Email ID");
            valid = false;
        }

        if (TextUtils.isEmpty(pwd) || pwd.length() < 8 || pwd.contains(" ")) {
            password.setError("Password must be atleast 8 characters long and cannot contain whitespace");
            valid = false;
        }

        return valid;
    }

    @Override
    protected void onResume() {
        super.onResume();
        registerReceiver();
    }

    @Override
    protected void onPause() {
        LocalBroadcastManager.getInstance(this).unregisterReceiver(mRegistrationBroadcastReceiver);
        isReceiverRegistered = false;
        super.onPause();
    }

    private void registerReceiver() {
        if (!isReceiverRegistered) {
            LocalBroadcastManager.getInstance(this).registerReceiver(mRegistrationBroadcastReceiver,
                    new IntentFilter(AppPreferences.REGISTRATION_COMPLETE));
            isReceiverRegistered = true;
        }
    }

    /**
     * Check the device to make sure it has the Google Play Services APK. If
     * it doesn't, display a dialog that allows users to download the APK from
     * the Google Play Store or enable it in the device's system settings.
     */
    private boolean checkPlayServices() {
        GoogleApiAvailability apiAvailability = GoogleApiAvailability.getInstance();
        int resultCode = apiAvailability.isGooglePlayServicesAvailable(this);
        if (resultCode != ConnectionResult.SUCCESS) {
            if (apiAvailability.isUserResolvableError(resultCode)) {
                apiAvailability.getErrorDialog(this, resultCode, PLAY_SERVICES_RESOLUTION_REQUEST).show();
            } else {
                Log.i(TAG, "This device is not supported.");
                finish();
            }
            return false;
        }
        return true;
    }

}