fork download

copy

/**
 * Copyright Google Inc. All Rights Reserved.
 * <p/>
 * 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
 * <p/>
 * http://w...content-available-to-author-only...e.org/licenses/LICENSE-2.0
 * <p/>
 * 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 com.google.firebase.udacity.friendlychat;
 
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.text.Editable;
import android.text.InputFilter;
import android.text.TextWatcher;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.Toast;
 
import com.firebase.ui.auth.AuthUI;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.ChildEventListener;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.DatabaseReference;
 
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
 
public class MainActivity extends AppCompatActivity {
 
    private static final String TAG = "MainActivity";
 
    public static final String ANONYMOUS = "anonymous";
    public static final int DEFAULT_MSG_LENGTH_LIMIT = 1000;
    public static final int RC_SIGN_IN = 1;
 
    private ListView mMessageListView;
    private MessageAdapter mMessageAdapter;
    private ProgressBar mProgressBar;
    private ImageButton mPhotoPickerButton;
    private EditText mMessageEditText;
    private Button mSendButton;
 
    private String mUsername;
 
    // Firebase instance variables
    private FirebaseDatabase mFirebaseDatabase;
    private DatabaseReference mMessagesDatabaseReference;
    private ChildEventListener mChildEventListener;
    private FirebaseAuth mFirebaseAuth;
    private FirebaseAuth.AuthStateListener mAuthStateListener;
 
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        mUsername = ANONYMOUS;
 
        // Initialize Firebase components. Added manually
        mFirebaseDatabase = FirebaseDatabase.getInstance();
        mFirebaseAuth = FirebaseAuth.getInstance();
 
        mMessagesDatabaseReference = mFirebaseDatabase.getReference().child("messages");
 
        // Initialize references to views
        mProgressBar = (ProgressBar) findViewById(R.id.progressBar);
        mMessageListView = (ListView) findViewById(R.id.messageListView);
        mPhotoPickerButton = (ImageButton) findViewById(R.id.photoPickerButton);
        mMessageEditText = (EditText) findViewById(R.id.messageEditText);
        mSendButton = (Button) findViewById(R.id.sendButton);
 
        // Initialize message ListView and its adapter
        List<FriendlyMessage> friendlyMessages = new ArrayList<>();
        mMessageAdapter = new MessageAdapter(this, R.layout.item_message, friendlyMessages);
        mMessageListView.setAdapter(mMessageAdapter);
 
        // Initialize progress bar
        mProgressBar.setVisibility(ProgressBar.INVISIBLE);
 
        // ImagePickerButton shows an image picker to upload a image for a message
        mPhotoPickerButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                // TODO: Fire an intent to show an image picker
            }
        });
 
        // Enable Send button when there's text to send
        mMessageEditText.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
            }
 
            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
                if (charSequence.toString().trim().length() > 0) {
                    mSendButton.setEnabled(true);
                } else {
                    mSendButton.setEnabled(false);
                }
            }
 
            @Override
            public void afterTextChanged(Editable editable) {
            }
        });
        mMessageEditText.setFilters(new InputFilter[]{new InputFilter.LengthFilter(DEFAULT_MSG_LENGTH_LIMIT)});
 
        // Send button sends a message and clears the EditText
        // Added manually
        mSendButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view){
                // TODO: Send messages on click
 
                FriendlyMessage friendlyMessage = new FriendlyMessage(mMessageEditText.getText().toString(), mUsername, null);
                mMessagesDatabaseReference.push().setValue(friendlyMessage);
 
                // Clear input box
                mMessageEditText.setText("");
            }
        });
        /*mSendButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                // TODO: Send messages on click
 
                // Clear input box
                mMessageEditText.setText("");
            }
        });*/
 
        mAuthStateListener = new FirebaseAuth.AuthStateListener() {
            @Override
            public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth){
                FirebaseUser user = firebaseAuth.getCurrentUser();
                if (user != null){
                    // User is signed in
                    //Toast.makeText(MainActivity.this, "You're now signed in. Welcome to FriendlyChat!", Toast.LENGTH_SHORT).show();
                    onSignedInInitialize(user.getDisplayName());
                }else{
                    // User is signed out
                    onSignedOutCleanup();
                    startActivityForResult(
                            AuthUI.getInstance()
                                    .createSignInIntentBuilder()
                                    .setIsSmartLockEnabled(false)
                                    .setAvailableProviders(Arrays.asList(
                                            new AuthUI.IdpConfig.GoogleBuilder().build(),
                                            new AuthUI.IdpConfig.EmailBuilder().build()))
                                    .build(),
                            RC_SIGN_IN);
                }
            }
        };
    }
 
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.main_menu, menu);
        return true;
    }
 
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch ( item.getItemId()){
            case R.id.sign_out_menu:
                // Sign out
                AuthUI.getInstance().signOut(this);
                return true;
 
            default:
                return super.onOptionsItemSelected(item);
        }
    }
 
    /*@Override
    protected void onStop(){
        super.onStop();
        FirebaseAuth.getInstance().signOut();
    }*/
 
    @Override  // Added manually.
    protected void onPause(){
        super.onPause();
 
        if (mAuthStateListener != null) {
            mFirebaseAuth.removeAuthStateListener(mAuthStateListener);
        }
 
        detachDatabaseReadListener();
        mMessageAdapter.clear();
    }
 
    @Override  // Added manually.
    public void onActivityResult(int requestCode, int resultCode, Intent data){
        super.onActivityResult(requestCode, resultCode, data);
 
        if(requestCode == RC_SIGN_IN){
            if(resultCode == RESULT_OK) {
                Toast.makeText(this, "Signed in!", Toast.LENGTH_SHORT).show();
            }
        }else if(resultCode == RESULT_CANCELED){
            Toast.makeText(this, "Sign in canceled", Toast.LENGTH_SHORT).show();
            finish();
        }
 
        Toast.makeText(this, String.valueOf(requestCode), Toast.LENGTH_SHORT).show();
    }
 
    @Override  // Added manually.
    protected void onResume() {
        super.onResume();
        mFirebaseAuth.addAuthStateListener(mAuthStateListener);
    }
 
    private void onSignedInInitialize(String username){
        mUsername = username;
        attachDatabaseReadListener();
    }
 
    private void onSignedOutCleanup(){
        mUsername = ANONYMOUS;
        mMessageAdapter.clear();
        detachDatabaseReadListener();
    }
 
    private void attachDatabaseReadListener(){
        if( mChildEventListener == null ) {
            mChildEventListener = new ChildEventListener() {
                @Override
                public void onChildAdded(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {
                    FriendlyMessage friendlyMessage = dataSnapshot.getValue(FriendlyMessage.class);
                    mMessageAdapter.add(friendlyMessage);
                }
 
                @Override
                public void onChildChanged(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {
 
                }
 
                @Override
                public void onChildRemoved(@NonNull DataSnapshot dataSnapshot) {
 
                }
 
                @Override
                public void onChildMoved(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {
 
                }
 
                @Override
                public void onCancelled(@NonNull DatabaseError databaseError) {
 
                }
            };
            mMessagesDatabaseReference.addChildEventListener(mChildEventListener);
        }
    }
 
    private void detachDatabaseReadListener(){
        if (mChildEventListener != null) {
            mMessagesDatabaseReference.removeEventListener(mChildEventListener);
            mChildEventListener = null;
        }
    }
}
 

Main.java:50: error: class MainActivity is public, should be declared in a file named MainActivity.java
public class MainActivity extends AppCompatActivity {
       ^
Main.java:18: error: package android.content does not exist
import android.content.Intent;
                      ^
Main.java:19: error: package android.os does not exist
import android.os.Bundle;
                 ^
Main.java:20: error: package android.support.annotation does not exist
import android.support.annotation.NonNull;
                                 ^
Main.java:21: error: package android.support.annotation does not exist
import android.support.annotation.Nullable;
                                 ^
Main.java:22: error: package android.support.v7.app does not exist
import android.support.v7.app.AppCompatActivity;
                             ^
Main.java:23: error: package android.text does not exist
import android.text.Editable;
                   ^
Main.java:24: error: package android.text does not exist
import android.text.InputFilter;
                   ^
Main.java:25: error: package android.text does not exist
import android.text.TextWatcher;
                   ^
Main.java:26: error: package android.view does not exist
import android.view.Menu;
                   ^
Main.java:27: error: package android.view does not exist
import android.view.MenuInflater;
                   ^
Main.java:28: error: package android.view does not exist
import android.view.MenuItem;
                   ^
Main.java:29: error: package android.view does not exist
import android.view.View;
                   ^
Main.java:30: error: package android.widget does not exist
import android.widget.Button;
                     ^
Main.java:31: error: package android.widget does not exist
import android.widget.EditText;
                     ^
Main.java:32: error: package android.widget does not exist
import android.widget.ImageButton;
                     ^
Main.java:33: error: package android.widget does not exist
import android.widget.ListView;
                     ^
Main.java:34: error: package android.widget does not exist
import android.widget.ProgressBar;
                     ^
Main.java:35: error: package android.widget does not exist
import android.widget.Toast;
                     ^
Main.java:37: error: package com.firebase.ui.auth does not exist
import com.firebase.ui.auth.AuthUI;
                           ^
Main.java:38: error: package com.google.firebase.auth does not exist
import com.google.firebase.auth.FirebaseAuth;
                               ^
Main.java:39: error: package com.google.firebase.auth does not exist
import com.google.firebase.auth.FirebaseUser;
                               ^
Main.java:40: error: package com.google.firebase.database does not exist
import com.google.firebase.database.ChildEventListener;
                                   ^
Main.java:41: error: package com.google.firebase.database does not exist
import com.google.firebase.database.DataSnapshot;
                                   ^
Main.java:42: error: package com.google.firebase.database does not exist
import com.google.firebase.database.DatabaseError;
                                   ^
Main.java:43: error: package com.google.firebase.database does not exist
import com.google.firebase.database.FirebaseDatabase;
                                   ^
Main.java:44: error: package com.google.firebase.database does not exist
import com.google.firebase.database.DatabaseReference;
                                   ^
Main.java:50: error: cannot find symbol
public class MainActivity extends AppCompatActivity {
                                  ^
  symbol: class AppCompatActivity
Main.java:58: error: cannot find symbol
    private ListView mMessageListView;
            ^
  symbol:   class ListView
  location: class MainActivity
Main.java:59: error: cannot find symbol
    private MessageAdapter mMessageAdapter;
            ^
  symbol:   class MessageAdapter
  location: class MainActivity
Main.java:60: error: cannot find symbol
    private ProgressBar mProgressBar;
            ^
  symbol:   class ProgressBar
  location: class MainActivity
Main.java:61: error: cannot find symbol
    private ImageButton mPhotoPickerButton;
            ^
  symbol:   class ImageButton
  location: class MainActivity
Main.java:62: error: cannot find symbol
    private EditText mMessageEditText;
            ^
  symbol:   class EditText
  location: class MainActivity
Main.java:63: error: cannot find symbol
    private Button mSendButton;
            ^
  symbol:   class Button
  location: class MainActivity
Main.java:68: error: cannot find symbol
    private FirebaseDatabase mFirebaseDatabase;
            ^
  symbol:   class FirebaseDatabase
  location: class MainActivity
Main.java:69: error: cannot find symbol
    private DatabaseReference mMessagesDatabaseReference;
            ^
  symbol:   class DatabaseReference
  location: class MainActivity
Main.java:70: error: cannot find symbol
    private ChildEventListener mChildEventListener;
            ^
  symbol:   class ChildEventListener
  location: class MainActivity
Main.java:71: error: cannot find symbol
    private FirebaseAuth mFirebaseAuth;
            ^
  symbol:   class FirebaseAuth
  location: class MainActivity
Main.java:72: error: package FirebaseAuth does not exist
    private FirebaseAuth.AuthStateListener mAuthStateListener;
                        ^
Main.java:76: error: cannot find symbol
    protected void onCreate(Bundle savedInstanceState) {
                            ^
  symbol:   class Bundle
  location: class MainActivity
Main.java:182: error: cannot find symbol
    public boolean onCreateOptionsMenu(Menu menu) {
                                       ^
  symbol:   class Menu
  location: class MainActivity
Main.java:189: error: cannot find symbol
    public boolean onOptionsItemSelected(MenuItem item) {
                                         ^
  symbol:   class MenuItem
  location: class MainActivity
Main.java:220: error: cannot find symbol
    public void onActivityResult(int requestCode, int resultCode, Intent data){
                                                                  ^
  symbol:   class Intent
  location: class MainActivity
Main.java:75: error: method does not override or implement a method from a supertype
    @Override
    ^
Main.java:77: error: cannot find symbol
        super.onCreate(savedInstanceState);
        ^
  symbol:   variable super
  location: class MainActivity
Main.java:78: error: package R does not exist
        setContentView(R.layout.activity_main);
                        ^
Main.java:83: error: cannot find symbol
        mFirebaseDatabase = FirebaseDatabase.getInstance();
                            ^
  symbol:   variable FirebaseDatabase
  location: class MainActivity
Main.java:84: error: cannot find symbol
        mFirebaseAuth = FirebaseAuth.getInstance();
                        ^
  symbol:   variable FirebaseAuth
  location: class MainActivity
Main.java:89: error: cannot find symbol
        mProgressBar = (ProgressBar) findViewById(R.id.progressBar);
                        ^
  symbol:   class ProgressBar
  location: class MainActivity
Main.java:89: error: package R does not exist
        mProgressBar = (ProgressBar) findViewById(R.id.progressBar);
                                                   ^
Main.java:90: error: cannot find symbol
        mMessageListView = (ListView) findViewById(R.id.messageListView);
                            ^
  symbol:   class ListView
  location: class MainActivity
Main.java:90: error: package R does not exist
        mMessageListView = (ListView) findViewById(R.id.messageListView);
                                                    ^
Main.java:91: error: cannot find symbol
        mPhotoPickerButton = (ImageButton) findViewById(R.id.photoPickerButton);
                              ^
  symbol:   class ImageButton
  location: class MainActivity
Main.java:91: error: package R does not exist
        mPhotoPickerButton = (ImageButton) findViewById(R.id.photoPickerButton);
                                                         ^
Main.java:92: error: cannot find symbol
        mMessageEditText = (EditText) findViewById(R.id.messageEditText);
                            ^
  symbol:   class EditText
  location: class MainActivity
Main.java:92: error: package R does not exist
        mMessageEditText = (EditText) findViewById(R.id.messageEditText);
                                                    ^
Main.java:93: error: cannot find symbol
        mSendButton = (Button) findViewById(R.id.sendButton);
                       ^
  symbol:   class Button
  location: class MainActivity
Main.java:93: error: package R does not exist
        mSendButton = (Button) findViewById(R.id.sendButton);
                                             ^
Main.java:96: error: cannot find symbol
        List<FriendlyMessage> friendlyMessages = new ArrayList<>();
             ^
  symbol:   class FriendlyMessage
  location: class MainActivity
Main.java:97: error: cannot find symbol
        mMessageAdapter = new MessageAdapter(this, R.layout.item_message, friendlyMessages);
                              ^
  symbol:   class MessageAdapter
  location: class MainActivity
Main.java:97: error: package R does not exist
        mMessageAdapter = new MessageAdapter(this, R.layout.item_message, friendlyMessages);
                                                    ^
Main.java:101: error: cannot find symbol
        mProgressBar.setVisibility(ProgressBar.INVISIBLE);
                                   ^
  symbol:   variable ProgressBar
  location: class MainActivity
Main.java:104: error: package View does not exist
        mPhotoPickerButton.setOnClickListener(new View.OnClickListener() {
                                                      ^
Main.java:112: error: cannot find symbol
        mMessageEditText.addTextChangedListener(new TextWatcher() {
                                                    ^
  symbol:   class TextWatcher
  location: class MainActivity
Main.java:130: error: cannot find symbol
        mMessageEditText.setFilters(new InputFilter[]{new InputFilter.LengthFilter(DEFAULT_MSG_LENGTH_LIMIT)});
                                        ^
  symbol:   class InputFilter
  location: class MainActivity
Main.java:130: error: package InputFilter does not exist
        mMessageEditText.setFilters(new InputFilter[]{new InputFilter.LengthFilter(DEFAULT_MSG_LENGTH_LIMIT)});
                                                                     ^
Main.java:134: error: package View does not exist
        mSendButton.setOnClickListener(new View.OnClickListener() {
                                               ^
Main.java:156: error: package FirebaseAuth does not exist
        mAuthStateListener = new FirebaseAuth.AuthStateListener() {
                                             ^
Main.java:181: error: method does not override or implement a method from a supertype
    @Override
    ^
Main.java:183: error: cannot find symbol
        MenuInflater inflater = getMenuInflater();
        ^
  symbol:   class MenuInflater
  location: class MainActivity
Main.java:183: error: cannot find symbol
        MenuInflater inflater = getMenuInflater();
                                ^
  symbol:   method getMenuInflater()
  location: class MainActivity
Main.java:184: error: package R does not exist
        inflater.inflate(R.menu.main_menu, menu);
                          ^
Main.java:188: error: method does not override or implement a method from a supertype
    @Override
    ^
Main.java:191: error: package R does not exist
            case R.id.sign_out_menu:
                  ^
Main.java:193: error: cannot find symbol
                AuthUI.getInstance().signOut(this);
                ^
  symbol:   variable AuthUI
  location: class MainActivity
Main.java:197: error: cannot find symbol
                return super.onOptionsItemSelected(item);
                       ^
  symbol:   variable super
  location: class MainActivity
Main.java:207: error: method does not override or implement a method from a supertype
    @Override  // Added manually.
    ^
Main.java:209: error: cannot find symbol
        super.onPause();
        ^
  symbol:   variable super
  location: class MainActivity
Main.java:219: error: method does not override or implement a method from a supertype
    @Override  // Added manually.
    ^
Main.java:221: error: cannot find symbol
        super.onActivityResult(requestCode, resultCode, data);
        ^
  symbol:   variable super
  location: class MainActivity
Main.java:224: error: cannot find symbol
            if(resultCode == RESULT_OK) {
                             ^
  symbol:   variable RESULT_OK
  location: class MainActivity
Main.java:225: error: cannot find symbol
                Toast.makeText(this, "Signed in!", Toast.LENGTH_SHORT).show();
                                                   ^
  symbol:   variable Toast
  location: class MainActivity
Main.java:225: error: cannot find symbol
                Toast.makeText(this, "Signed in!", Toast.LENGTH_SHORT).show();
                ^
  symbol:   variable Toast
  location: class MainActivity
Main.java:227: error: cannot find symbol
        }else if(resultCode == RESULT_CANCELED){
                               ^
  symbol:   variable RESULT_CANCELED
  location: class MainActivity
Main.java:228: error: cannot find symbol
            Toast.makeText(this, "Sign in canceled", Toast.LENGTH_SHORT).show();
                                                     ^
  symbol:   variable Toast
  location: class MainActivity
Main.java:228: error: cannot find symbol
            Toast.makeText(this, "Sign in canceled", Toast.LENGTH_SHORT).show();
            ^
  symbol:   variable Toast
  location: class MainActivity
Main.java:229: error: cannot find symbol
            finish();
            ^
  symbol:   method finish()
  location: class MainActivity
Main.java:232: error: cannot find symbol
        Toast.makeText(this, String.valueOf(requestCode), Toast.LENGTH_SHORT).show();
                                                          ^
  symbol:   variable Toast
  location: class MainActivity
Main.java:232: error: cannot find symbol
        Toast.makeText(this, String.valueOf(requestCode), Toast.LENGTH_SHORT).show();
        ^
  symbol:   variable Toast
  location: class MainActivity
Main.java:235: error: method does not override or implement a method from a supertype
    @Override  // Added manually.
    ^
Main.java:237: error: cannot find symbol
        super.onResume();
        ^
  symbol:   variable super
  location: class MainActivity
Main.java:254: error: cannot find symbol
            mChildEventListener = new ChildEventListener() {
                                      ^
  symbol:   class ChildEventListener
  location: class MainActivity
92 errors

Standard output is empty