Java tutorial
/** * 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://www.apache.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.pr.carjoin.chat; import android.content.Intent; import android.content.SharedPreferences; import android.os.Bundle; import android.preference.PreferenceManager; import android.support.annotation.NonNull; 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.EditText; import android.widget.ImageButton; import android.widget.ProgressBar; import android.widget.TextView; import com.bumptech.glide.Glide; import com.firebase.ui.database.FirebaseRecyclerAdapter; import com.google.android.gms.appinvite.AppInvite; import com.google.android.gms.appinvite.AppInviteInvitation; import com.google.android.gms.appinvite.AppInviteInvitationResult; import com.google.android.gms.appinvite.AppInviteReferral; 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.common.api.ResultCallback; import com.google.android.gms.tasks.OnCompleteListener; import com.google.android.gms.tasks.Task; import com.google.firebase.analytics.FirebaseAnalytics; import com.google.firebase.auth.FirebaseAuth; import com.google.firebase.auth.FirebaseUser; import com.google.firebase.crash.FirebaseCrash; 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 com.pr.carjoin.BuildConfig; import com.pr.carjoin.R; import com.pr.carjoin.activities.LoginActivity; import java.util.HashMap; import java.util.Map; import de.hdodenhof.circleimageview.CircleImageView; public class ChatMainActivity extends AppCompatActivity implements GoogleApiClient.OnConnectionFailedListener { public static class MessageViewHolder extends RecyclerView.ViewHolder { public TextView messageTextView; public TextView messengerTextView; public CircleImageView messengerImageView; 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); } } private static final String TAG = "ChatMainActivity"; 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 ImageButton mSendButton; private RecyclerView mMessageRecyclerView; private LinearLayoutManager mLinearLayoutManager; private FirebaseRecyclerAdapter<FriendlyMessage, MessageViewHolder> mFirebaseAdapter; private ProgressBar mProgressBar; private DatabaseReference mFirebaseDatabaseReference; private FirebaseAuth mFirebaseAuth; private FirebaseUser mFirebaseUser; private FirebaseAnalytics mFirebaseAnalytics; private EditText mMessageEditText; private FirebaseRemoteConfig mFirebaseRemoteConfig; private GoogleApiClient mGoogleApiClient; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_chat_main); SharedPreferences mSharedPreferences = PreferenceManager.getDefaultSharedPreferences(this); mUsername = ANONYMOUS; // Initialize Firebase Auth mFirebaseAuth = FirebaseAuth.getInstance(); mFirebaseUser = mFirebaseAuth.getCurrentUser(); if (mFirebaseUser == null) { // Not signed in, launch the Sign In activity startActivity(new Intent(this, LoginActivity.class)); finish(); return; } else { mUsername = mFirebaseUser.getDisplayName(); mPhotoUrl = mFirebaseUser.getPhotoUrl().toString(); } mGoogleApiClient = new GoogleApiClient.Builder(this) .enableAutoManage(this /* FragmentActivity */, this /* OnConnectionFailedListener */) .addApi(Auth.GOOGLE_SIGN_IN_API).addApi(AppInvite.API).build(); mProgressBar = (ProgressBar) findViewById(R.id.progressBar); mMessageRecyclerView = (RecyclerView) findViewById(R.id.messageRecyclerView); mLinearLayoutManager = new LinearLayoutManager(this); mLinearLayoutManager.setStackFromEnd(true); mFirebaseDatabaseReference = FirebaseDatabase.getInstance().getReference(); 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.getPhotoUrl() == null) { viewHolder.messengerImageView.setImageDrawable(ContextCompat.getDrawable(ChatMainActivity.this, R.drawable.ic_account_circle_black_36dp)); } else { Glide.with(ChatMainActivity.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); // Initialize Firebase Measurement. mFirebaseAnalytics = FirebaseAnalytics.getInstance(this); // Initialize Firebase Remote Config. mFirebaseRemoteConfig = FirebaseRemoteConfig.getInstance(); // Define Firebase Remote Config Settings. FirebaseRemoteConfigSettings firebaseRemoteConfigSettings = new FirebaseRemoteConfigSettings.Builder() .setDeveloperModeEnabled(BuildConfig.DEBUG).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(); mMessageEditText = (EditText) findViewById(R.id.messageEditText); mMessageEditText.setFilters(new InputFilter[] { new InputFilter.LengthFilter( mSharedPreferences.getInt(CodelabPreferences.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 = (ImageButton) findViewById(R.id.sendButton); mSendButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { FriendlyMessage friendlyMessage = new FriendlyMessage(mMessageEditText.getText().toString(), mUsername, mPhotoUrl); mFirebaseDatabaseReference.child(MESSAGES_CHILD).push().setValue(friendlyMessage); mMessageEditText.setText(""); mFirebaseAnalytics.logEvent(MESSAGE_SENT_EVENT, null); } }); } @Override public void onPause() { super.onPause(); } @Override public void onResume() { super.onResume(); } @Override public void onDestroy() { 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.invite_menu: sendInvitation(); return true; case R.id.crash_menu: FirebaseCrash.logcat(Log.ERROR, TAG, "crash caused"); causeCrash(); return true; case R.id.sign_out_menu: mFirebaseAuth.signOut(); Auth.GoogleSignInApi.signOut(mGoogleApiClient); mFirebaseUser = null; mUsername = ANONYMOUS; mPhotoUrl = null; startActivity(new Intent(this, LoginActivity.class)); return true; case R.id.fresh_config_menu: fetchConfig(); return true; default: return super.onOptionsItemSelected(item); } } private void causeCrash() { throw new NullPointerException("Fake null pointer exception"); } 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); } // 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).addOnCompleteListener(this, new OnCompleteListener<Void>() { @Override public void onComplete(@NonNull Task<Void> task) { if (task.isSuccessful()) { Log.d(TAG, "Fetch Succeeded"); mFirebaseRemoteConfig.activateFetched(); applyRetrievedLengthLimit(); } else { // There has been an error fetching the config Log.w(TAG, "Error fetching config: " + task.getResult()); } } }); } @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) { // Use Firebase Measurement to log that invitation was sent. Bundle payload = new Bundle(); payload.putString(FirebaseAnalytics.Param.VALUE, "inv_sent"); // Check how many invitations were sent and log. String[] ids = AppInviteInvitation.getInvitationIds(resultCode, data); Log.d(TAG, "Invitations sent: " + ids.length); getInvite(); } else { // Use Firebase Measurement to log that invitation was not sent Bundle payload = new Bundle(); payload.putString(FirebaseAnalytics.Param.VALUE, "inv_not_sent"); mFirebaseAnalytics.logEvent(FirebaseAnalytics.Event.SHARE, payload); // Sending failed or it was canceled, show failure message to the user Log.d(TAG, "Failed to send invitation."); } } } /** * 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); } @Override public void onConnectionFailed(@NonNull ConnectionResult connectionResult) { Log.d(TAG, "onConnectionFailed:" + connectionResult); } public void getInvite() { // Check for App Invite invitations and launch deep-link activity if possible. // Requires that an Activity is registered in AndroidManifest.xml to handle // deep-link URLs. boolean autoLaunchDeepLink = true; AppInvite.AppInviteApi.getInvitation(mGoogleApiClient, this, autoLaunchDeepLink) .setResultCallback(new ResultCallback<AppInviteInvitationResult>() { @Override public void onResult(@NonNull AppInviteInvitationResult result) { Log.d(TAG, "getInvitation:onResult:" + result.getStatus()); if (result.getStatus().isSuccess()) { // Extract information from the intent Intent intent = result.getInvitationIntent(); String deepLink = AppInviteReferral.getDeepLink(intent); String invitationId = AppInviteReferral.getInvitationId(intent); // Because autoLaunchDeepLink = true we don't have to do anything // here, but we could set that to false and manually choose // an Activity to launch to handle the deep link here. // ... } } }); } }