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 fishlinghu.sporttogether; 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.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.ImageView; 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.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.OnCompleteListener; import com.google.android.gms.tasks.Task; import com.google.firebase.auth.FirebaseAuth; import com.google.firebase.auth.FirebaseUser; import com.google.firebase.database.DataSnapshot; import com.google.firebase.database.DatabaseError; import com.google.firebase.database.DatabaseReference; import com.google.firebase.database.FirebaseDatabase; import com.google.firebase.database.Query; import com.google.firebase.database.ValueEventListener; import com.google.firebase.storage.FirebaseStorage; import com.google.firebase.storage.StorageReference; import com.google.firebase.storage.UploadTask; import java.util.ArrayList; import de.hdodenhof.circleimageview.CircleImageView; public class ChatActivity extends AppCompatActivity implements GoogleApiClient.OnConnectionFailedListener { // Firebase instance variables private FirebaseAuth mFirebaseAuth; private FirebaseUser mFirebaseUser; private String AccountEmail; private String AccountEmailKey; private double Eventlongitude; private double Eventlatitude; // Firebase instance variables private DatabaseReference mFirebaseDatabaseReference; private FirebaseRecyclerAdapter<FriendlyMessage, MessageViewHolder> mFirebaseAdapter; public static class MessageViewHolder extends RecyclerView.ViewHolder { public TextView messageTextView; public ImageView messageImageView; public TextView messengerTextView; public CircleImageView messengerImageView; public MessageViewHolder(View v) { super(v); messageTextView = (TextView) itemView.findViewById(R.id.messageTextView); messageImageView = (ImageView) itemView.findViewById(R.id.messageImageView); messengerTextView = (TextView) itemView.findViewById(R.id.messengerTextView); messengerImageView = (CircleImageView) itemView.findViewById(R.id.messengerImageView); } } private static final String TAG = "ChatActivity"; //public static final String MESSAGES_CHILD = "messages"; public String roomKey; private static final int REQUEST_INVITE = 1; private static final int REQUEST_IMAGE = 2; private static final String LOADING_IMAGE_URL = "https://www.google.com/images/spin-32.gif"; public static final int DEFAULT_MSG_LENGTH_LIMIT = 2000; 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://friendlychat.firebase.google.com/message/"; private Chatroom RoomData; private Button mSendButton; private Button mLeaveButton; private Button mGoButton; private Button mMapButton; private RecyclerView mMessageRecyclerView; private LinearLayoutManager mLinearLayoutManager; private ProgressBar mProgressBar; private EditText mMessageEditText; private ImageView mAddMessageImageView; private TextView mSportTextView; private TextView mTimeTextView; private TextView mLocationTextView; // Firebase instance variables @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // get the room key Intent myIntent = getIntent(); roomKey = myIntent.getStringExtra("roomKey"); setContentView(R.layout.activity_chat); mSharedPreferences = PreferenceManager.getDefaultSharedPreferences(this); // Set default username is anonymous. mUsername = ANONYMOUS; // Initialize Firebase Auth mFirebaseAuth = FirebaseAuth.getInstance(); mFirebaseUser = mFirebaseAuth.getCurrentUser(); AccountEmail = mFirebaseUser.getEmail(); AccountEmailKey = AccountEmail.replace(".", ","); 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).build(); // Initialize ProgressBar and RecyclerView. mProgressBar = (ProgressBar) findViewById(R.id.progressBar);// why is progress bar keep rolling when there is no message? mMessageRecyclerView = (RecyclerView) findViewById(R.id.messageRecyclerView); mLinearLayoutManager = new LinearLayoutManager(this); mLinearLayoutManager.setStackFromEnd(true); mMessageRecyclerView.setLayoutManager(mLinearLayoutManager); // New child entries // This code initially adds all existing messages // then listens for new child entries under the messages path in your Firebase Realtime Database. // It adds a new element to the UI for each message. mFirebaseDatabaseReference = FirebaseDatabase.getInstance().getReference(); // show the room information mSportTextView = (TextView) findViewById(R.id.textView16); mTimeTextView = (TextView) findViewById(R.id.textview_time); mLocationTextView = (TextView) findViewById(R.id.textview_location); Query query = mFirebaseDatabaseReference.child("chatrooms").child(roomKey); query.addListenerForSingleValueEvent(new ValueEventListener() { @Override public void onDataChange(DataSnapshot dataSnapshot) { if (dataSnapshot.exists()) { RoomData = dataSnapshot.getValue(Chatroom.class); mSportTextView.setText(RoomData.getSport()); mTimeTextView.setText(RoomData.getIntendedDate() + RoomData.getIntendedTime()); mLocationTextView.setText(RoomData.getLocation()); Eventlongitude = RoomData.getLongitude(); Eventlatitude = RoomData.getLatitude(); } } @Override public void onCancelled(DatabaseError databaseError) { } }); mFirebaseAdapter = new FirebaseRecyclerAdapter<FriendlyMessage, MessageViewHolder>(FriendlyMessage.class, R.layout.item_message, MessageViewHolder.class, mFirebaseDatabaseReference.child("chatrooms").child(roomKey).child("messages")) { @Override protected void populateViewHolder(final MessageViewHolder viewHolder, FriendlyMessage friendlyMessage, int position) { mProgressBar.setVisibility(ProgressBar.INVISIBLE); if (friendlyMessage.getText() != null) { viewHolder.messageTextView.setText(friendlyMessage.getText()); viewHolder.messageTextView.setVisibility(TextView.VISIBLE); viewHolder.messageImageView.setVisibility(ImageView.GONE); } else { String imageUrl = friendlyMessage.getImageUrl(); if (imageUrl.startsWith("gs://")) { StorageReference storageReference = FirebaseStorage.getInstance() .getReferenceFromUrl(imageUrl); storageReference.getDownloadUrl().addOnCompleteListener(new OnCompleteListener<Uri>() { @Override public void onComplete(@NonNull Task<Uri> task) { if (task.isSuccessful()) { String downloadUrl = task.getResult().toString(); Glide.with(viewHolder.messageImageView.getContext()).load(downloadUrl) .into(viewHolder.messageImageView); } else { Log.w(TAG, "Getting download url was not successful.", task.getException()); } } }); } else { Glide.with(viewHolder.messageImageView.getContext()).load(friendlyMessage.getImageUrl()) .into(viewHolder.messageImageView); } viewHolder.messageImageView.setVisibility(ImageView.VISIBLE); viewHolder.messageTextView.setVisibility(TextView.GONE); } viewHolder.messengerTextView.setText(friendlyMessage.getName()); if (friendlyMessage.getPhotoUrl() == null) { viewHolder.messengerImageView.setImageDrawable( ContextCompat.getDrawable(ChatActivity.this, R.drawable.ic_account_circle_black_36dp)); } else { Glide.with(ChatActivity.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(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 = (Button) findViewById(R.id.sendButton); mSendButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { // Send messages on click. FriendlyMessage friendlyMessage = new FriendlyMessage(mMessageEditText.getText().toString(), mUsername, mPhotoUrl, null); mFirebaseDatabaseReference.child("chatrooms").child(roomKey).child("messages").push() .setValue(friendlyMessage); mMessageEditText.setText(""); } }); mLeaveButton = (Button) findViewById(R.id.leaveButton); mLeaveButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // remove user's room key mFirebaseDatabaseReference.child("users").child(AccountEmailKey).child("roomKey").setValue(""); mFirebaseDatabaseReference.child("chatrooms").child(roomKey).child("users").child(AccountEmailKey) .removeValue(); // leave the room, go to home page Intent myIntent = new Intent(ChatActivity.this, MainPageActivity.class); startActivity(myIntent); } }); mGoButton = (Button) findViewById(R.id.goButton); mGoButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent myIntent = new Intent(ChatActivity.this, ReviewActivity.class); myIntent.putExtra("roomKey", roomKey); startActivity(myIntent); } }); mMapButton = (Button) findViewById(R.id.button_map); mMapButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent myIntent = new Intent(ChatActivity.this, EventMap.class); ArrayList<Double> Pointdata = new ArrayList<Double>(); Pointdata.add(Eventlatitude); Pointdata.add(Eventlongitude); myIntent.putExtra("point", Pointdata); startActivity(myIntent); } }); mAddMessageImageView = (ImageView) findViewById(R.id.addMessageImageView); mAddMessageImageView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { // Select image for image message on click. Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT); intent.addCategory(Intent.CATEGORY_OPENABLE); intent.setType("image/*"); startActivityForResult(intent, REQUEST_IMAGE); } }); } @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() { 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.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 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(); } private void putImageInStorage(StorageReference storageReference, Uri uri, final String key) { storageReference.putFile(uri).addOnCompleteListener(ChatActivity.this, new OnCompleteListener<UploadTask.TaskSnapshot>() { @Override public void onComplete(@NonNull Task<UploadTask.TaskSnapshot> task) { if (task.isSuccessful()) { FriendlyMessage friendlyMessage = new FriendlyMessage(null, mUsername, mPhotoUrl, task.getResult().getMetadata().getDownloadUrl().toString()); mFirebaseDatabaseReference.child("chatrooms").child(roomKey).child("messages") .child(key).setValue(friendlyMessage); } else { Log.w(TAG, "Image upload task was not successful.", task.getException()); } } }); } @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_IMAGE) { if (resultCode == RESULT_OK) { if (data != null) { final Uri uri = data.getData(); Log.d(TAG, "Uri: " + uri.toString()); FriendlyMessage tempMessage = new FriendlyMessage(null, mUsername, mPhotoUrl, LOADING_IMAGE_URL); mFirebaseDatabaseReference.child("chatrooms").child(roomKey).child("messages").push() .setValue(tempMessage, new DatabaseReference.CompletionListener() { @Override public void onComplete(DatabaseError databaseError, DatabaseReference databaseReference) { if (databaseError == null) { String key = databaseReference.getKey(); StorageReference storageReference = FirebaseStorage.getInstance() .getReference(mFirebaseUser.getUid()).child(key) .child(uri.getLastPathSegment()); putImageInStorage(storageReference, uri, key); } else { Log.w(TAG, "Unable to write message to database.", databaseError.toException()); } } }); } } } } }