Java tutorial
package com.teamproject.shoutbox; /** * Copyright 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. */ import android.app.AlertDialog; import android.content.DialogInterface; import android.content.Intent; import android.content.SharedPreferences; import android.net.Uri; import android.os.Bundle; import android.preference.PreferenceManager; import android.support.annotation.NonNull; import android.support.design.widget.FloatingActionButton; import android.support.v4.content.ContextCompat; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.text.Editable; import android.text.InputFilter; import android.text.TextWatcher; import android.util.Log; 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.ProgressBar; import android.widget.TextView; import android.widget.Toast; import com.bumptech.glide.Glide; import com.firebase.ui.database.FirebaseRecyclerAdapter; import com.github.amlcurran.showcaseview.ShowcaseView; import com.github.amlcurran.showcaseview.targets.Target; import com.github.amlcurran.showcaseview.targets.ViewTarget; import com.google.android.gms.ads.AdRequest; import com.google.android.gms.ads.AdView; import com.google.android.gms.ads.MobileAds; import com.google.android.gms.appinvite.AppInvite; import com.google.android.gms.appinvite.AppInviteInvitation; import com.google.android.gms.auth.api.Auth; import com.google.android.gms.common.ConnectionResult; import com.google.android.gms.common.api.GoogleApiClient; import com.google.android.gms.tasks.OnFailureListener; import com.google.android.gms.tasks.OnSuccessListener; import com.google.firebase.auth.FirebaseAuth; import com.google.firebase.auth.FirebaseUser; import com.google.firebase.database.DatabaseReference; import com.google.firebase.database.FirebaseDatabase; import com.google.firebase.remoteconfig.FirebaseRemoteConfig; import com.google.firebase.remoteconfig.FirebaseRemoteConfigSettings; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Date; import java.util.HashMap; import java.util.Map; import de.hdodenhof.circleimageview.CircleImageView; public class MainActivity extends AppCompatActivity implements GoogleApiClient.OnConnectionFailedListener { // Firebase instance variables private FirebaseAuth mFirebaseAuth; private FirebaseUser mFirebaseUser; private FirebaseRemoteConfig mFirebaseRemoteConfig; public TextView signout; public TextView invite; private AdView mAdView; //for Ads // Firebase instance variables private DatabaseReference mFirebaseDatabaseReference; private FirebaseRecyclerAdapter<FriendlyMessage, MessageViewHolder> mFirebaseAdapter; public static class MessageViewHolder extends RecyclerView.ViewHolder { //These are the things displayed on the recyclerview public TextView messageTextView; public TextView messengerTextView; public TextView timeView; public CircleImageView messengerImageView; //Constructor public MessageViewHolder(View v) { super(v); messageTextView = (TextView) itemView.findViewById(R.id.messageTextView); messengerTextView = (TextView) itemView.findViewById(R.id.messengerTextView); messengerImageView = (CircleImageView) itemView.findViewById(R.id.messengerImageView); timeView = (TextView) itemView.findViewById(R.id.timeView); } } private static final String TAG = "MainActivity"; public static final String MESSAGES_CHILD = "messages"; private static final int REQUEST_INVITE = 1; public static final int DEFAULT_MSG_LENGTH_LIMIT = 10; public static final String ANONYMOUS = "anonymous"; private static final String MESSAGE_SENT_EVENT = "message_sent"; private String mUsername; private String mPhotoUrl; private SharedPreferences mSharedPreferences; private GoogleApiClient mGoogleApiClient; private static final String MESSAGE_URL = "http://chat.firebase.google.com/message/"; private Button mSendButton; private RecyclerView mMessageRecyclerView; private LinearLayoutManager mLinearLayoutManager; private ProgressBar mProgressBar; private EditText mMessageEditText; private FloatingActionButton privacyPolicyButton; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //Ads initialize MobileAds.initialize(getApplicationContext(), "ca-app-pub-9985159092710073~2935916744"); //Load the ads mAdView = (AdView) findViewById(R.id.adView); AdRequest adRequest = new AdRequest.Builder().tagForChildDirectedTreatment(true).build(); mAdView.loadAd(adRequest); Target listObjetivo = new ViewTarget(R.id.invite, this); //SharedPreferences to show ShowCaseView a single time SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); if (!prefs.getBoolean("firstime", false)) { // run your one time code new ShowcaseView.Builder(this, true).setTarget(listObjetivo) .setContentTitle("Click to invite your friends") .setContentText("Long press on a name to view Google+ accounts").setStyle(4).build(); SharedPreferences.Editor editor = prefs.edit(); editor.putBoolean("firstime", true); editor.commit(); } Toast.makeText(getApplicationContext(), "Touch the lock icon for our privacy policy", Toast.LENGTH_SHORT) .show(); mSharedPreferences = PreferenceManager.getDefaultSharedPreferences(this); // Set default username to anonymous. mUsername = ANONYMOUS; invite = (TextView) findViewById(R.id.invite); signout = (TextView) findViewById(R.id.signout); //Signing you out signout.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { mFirebaseAuth.signOut(); Auth.GoogleSignInApi.signOut(mGoogleApiClient); mUsername = ANONYMOUS; startActivity(new Intent(MainActivity.this, SignInActivity.class)); Toast.makeText(MainActivity.this, "You've been logged out.", Toast.LENGTH_SHORT).show(); finish(); } }); //Invite text onclick invite.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { sendInvitation(); } }); //Initaialise privacy policy button privacyPolicyButton = (FloatingActionButton) findViewById(R.id.privacyPolicyButton); privacyPolicyButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Intent intent = new Intent(Intent.ACTION_VIEW); intent.setData(Uri.parse( "https://docs.google.com/document/d/1pEkK7fmB0RAo7ak-J1vZUYC0MCT8AvYxSid6Hi8X_94/edit?usp=sharing")); startActivity(intent); } }); // Initialize Firebase Auth mFirebaseAuth = FirebaseAuth.getInstance(); mFirebaseUser = mFirebaseAuth.getCurrentUser(); if (mFirebaseUser == null) { // Not signed in, launch the Sign In activity startActivity(new Intent(this, SignInActivity.class)); finish(); return; } else { mUsername = mFirebaseUser.getDisplayName(); if (mFirebaseUser.getPhotoUrl() != null) { mPhotoUrl = mFirebaseUser.getPhotoUrl().toString(); } } mGoogleApiClient = new GoogleApiClient.Builder(this) .enableAutoManage(this /* FragmentActivity */, this /* OnConnectionFailedListener */) .addApi(Auth.GOOGLE_SIGN_IN_API).addApi(AppInvite.API).build(); // Initialize ProgressBar and RecyclerView. mProgressBar = (ProgressBar) findViewById(R.id.progressBar); mMessageRecyclerView = (RecyclerView) findViewById(R.id.messageRecyclerView); mLinearLayoutManager = new LinearLayoutManager(this); mLinearLayoutManager.setStackFromEnd(true); mMessageRecyclerView.setLayoutManager(mLinearLayoutManager); // Initialize Firebase Remote Config. mFirebaseRemoteConfig = FirebaseRemoteConfig.getInstance(); // Define Firebase Remote Config Settings. FirebaseRemoteConfigSettings firebaseRemoteConfigSettings = new FirebaseRemoteConfigSettings.Builder() .setDeveloperModeEnabled(true).build(); // Define default config values. Defaults are used when fetched config values are not // available. Eg: if an error occurred fetching values from the server. Map<String, Object> defaultConfigMap = new HashMap<>(); defaultConfigMap.put("friendly_msg_length", 10L); // Apply config settings and default values. mFirebaseRemoteConfig.setConfigSettings(firebaseRemoteConfigSettings); mFirebaseRemoteConfig.setDefaults(defaultConfigMap); // Fetch remote config. fetchConfig(); // New child entries //Get reference to database mFirebaseDatabaseReference = FirebaseDatabase.getInstance().getReference(); //Prepare the adapter mFirebaseAdapter = new FirebaseRecyclerAdapter<FriendlyMessage, MessageViewHolder>(FriendlyMessage.class, R.layout.item_message, MessageViewHolder.class, mFirebaseDatabaseReference.child(MESSAGES_CHILD)) { @Override protected void populateViewHolder(MessageViewHolder viewHolder, FriendlyMessage friendlyMessage, int position) { mProgressBar.setVisibility(ProgressBar.INVISIBLE); viewHolder.messageTextView.setText(friendlyMessage.getText()); viewHolder.messengerTextView.setText(friendlyMessage.getName()); if (friendlyMessage.getCurrentTime() != null) viewHolder.timeView.setText(friendlyMessage.getCurrentTime()); if (friendlyMessage.getPhotoUrl() == null) { viewHolder.messengerImageView.setImageDrawable( ContextCompat.getDrawable(MainActivity.this, R.drawable.ic_account_circle_black_36dp)); } else { Glide.with(MainActivity.this).load(friendlyMessage.getPhotoUrl()) .into(viewHolder.messengerImageView); } } }; mFirebaseAdapter.registerAdapterDataObserver(new RecyclerView.AdapterDataObserver() { @Override public void onItemRangeInserted(int positionStart, int itemCount) { super.onItemRangeInserted(positionStart, itemCount); int friendlyMessageCount = mFirebaseAdapter.getItemCount(); int lastVisiblePosition = mLinearLayoutManager.findLastCompletelyVisibleItemPosition(); // If the recycler view is initially being loaded or the // user is at the bottom of the list, scroll to the bottom // of the list to show the newly added message. if (lastVisiblePosition == -1 || (positionStart >= (friendlyMessageCount - 1) && lastVisiblePosition == (positionStart - 1))) { mMessageRecyclerView.scrollToPosition(positionStart); } } }); mMessageRecyclerView.setLayoutManager(mLinearLayoutManager); mMessageRecyclerView.setAdapter(mFirebaseAdapter); mMessageEditText = (EditText) findViewById(R.id.messageEditText); mMessageEditText.setFilters(new InputFilter[] { new InputFilter.LengthFilter( mSharedPreferences.getInt(MyPreferences.FRIENDLY_MSG_LENGTH, DEFAULT_MSG_LENGTH_LIMIT)) }); 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) { } }); mSendButton = (Button) findViewById(R.id.sendButton); mSendButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { DateFormat dateFormat = new SimpleDateFormat("dd.MM.yyyy hh:mm a"); String currentTime = dateFormat.format(new Date()).toString(); //Check whether the message contains any abusive words int c = 0; String finalMessage = new String(mMessageEditText.getText().toString()); String filterMessage = finalMessage; OffensiveWords of = new OffensiveWords(); for (String str : of.getOffensive()) { //System.out.print(str+" ,"); if (finalMessage.toLowerCase().contains(str)) { filterMessage = filterMessage.toLowerCase().replace(str, " *offensive* "); c++; //There is at least one offensive word } } FriendlyMessage friendlyMessage; if (c == 0) //No offensive words { friendlyMessage = new FriendlyMessage(finalMessage, mUsername, mPhotoUrl, currentTime); } else { friendlyMessage = new FriendlyMessage(filterMessage, mUsername, mPhotoUrl, currentTime); showAlertDialog(); } mFirebaseDatabaseReference.child(MESSAGES_CHILD).push().setValue(friendlyMessage); mMessageEditText.setText(""); } }); } // Fetch the config to determine the allowed length of messages. public void fetchConfig() { long cacheExpiration = 3600; // 1 hour in seconds // If developer mode is enabled reduce cacheExpiration to 0 so that // each fetch goes to the server. This should not be used in release // builds. if (mFirebaseRemoteConfig.getInfo().getConfigSettings().isDeveloperModeEnabled()) { cacheExpiration = 0; } mFirebaseRemoteConfig.fetch(cacheExpiration).addOnSuccessListener(new OnSuccessListener<Void>() { @Override public void onSuccess(Void aVoid) { // Make the fetched config available via // FirebaseRemoteConfig get<type> calls. mFirebaseRemoteConfig.activateFetched(); applyRetrievedLengthLimit(); } }).addOnFailureListener(new OnFailureListener() { @Override public void onFailure(@NonNull Exception e) { // There has been an error fetching the config Log.w(TAG, "Error fetching config: " + e.getMessage()); applyRetrievedLengthLimit(); } }); } /** * Apply retrieved length limit to edit text field. * This result may be fresh from the server or it may be from cached * values. */ private void applyRetrievedLengthLimit() { Long friendly_msg_length = mFirebaseRemoteConfig.getLong("friendly_msg_length"); mMessageEditText .setFilters(new InputFilter[] { new InputFilter.LengthFilter(friendly_msg_length.intValue()) }); Log.d(TAG, "FML is: " + friendly_msg_length); } private void sendInvitation() { Intent intent = new AppInviteInvitation.IntentBuilder(getString(R.string.invitation_title)) .setMessage(getString(R.string.invitation_message)) .setCallToActionText(getString(R.string.invitation_cta)).build(); startActivityForResult(intent, REQUEST_INVITE); } @Override public void onStart() { super.onStart(); // Check if user is signed in. // TODO: Add code to check if user is signed in. } @Override public void onPause() { if (mAdView != null) { mAdView.pause(); } super.onPause(); } @Override public void onResume() { if (mAdView != null) { mAdView.resume(); } super.onResume(); } @Override public void onDestroy() { if (mAdView != null) { mAdView.destroy(); } super.onDestroy(); } @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: mFirebaseAuth.signOut(); Auth.GoogleSignInApi.signOut(mGoogleApiClient); mUsername = ANONYMOUS; startActivity(new Intent(this, SignInActivity.class)); return true; default: return super.onOptionsItemSelected(item); } } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); Log.d(TAG, "onActivityResult: requestCode=" + requestCode + ", resultCode=" + resultCode); if (requestCode == REQUEST_INVITE) { if (resultCode == RESULT_OK) { // Check how many invitations were sent. String[] ids = AppInviteInvitation.getInvitationIds(resultCode, data); Log.d(TAG, "Invitations sent: " + ids.length); } else { // Sending failed or it was canceled, show failure message to // the user Log.d(TAG, "Failed to send invitation."); } } } public void showAlertDialog() { AlertDialog alertDialog = new AlertDialog.Builder(this).create(); // Setting Dialog Title alertDialog.setTitle("ShoutBox"); // String s= (Html.fromHtml("<a href=\"http://www.google.com\">Check this link out</a>")).toString(); // Setting Dialog Message alertDialog.setMessage( "No abusive/offensive words please. You'll unnecessarily increase your chances of getting banned!"); // Setting Icon to Dialog alertDialog.setIcon(R.drawable.icon); // Setting OK Button alertDialog.setButton("OK", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { // Write your code here to execute after dialog closed //Toast.makeText(getApplicationContext(), "You clicked on OK", Toast.LENGTH_SHORT).show(); } }); // Showing Alert Message alertDialog.show(); } @Override public void onConnectionFailed(@NonNull ConnectionResult connectionResult) { // An unresolvable error has occurred and Google APIs (including Sign-In) will not // be available. Log.d(TAG, "onConnectionFailed:" + connectionResult); Toast.makeText(this, "Google Play Services error.", Toast.LENGTH_SHORT).show(); } }