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 edu.sfsu.csc780.chathub.ui.activities; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.content.pm.PackageManager; import android.graphics.Bitmap; import android.graphics.Color; import android.media.AudioManager; import android.net.Uri; import android.os.Bundle; import android.os.Environment; import android.preference.PreferenceManager; import android.provider.MediaStore; import android.support.annotation.NonNull; import android.support.design.widget.FloatingActionButton; import android.support.v4.app.DialogFragment; import android.support.v4.app.FragmentTransaction; import android.support.v4.app.LoaderManager; import android.support.v4.content.ContextCompat; import android.support.v4.content.Loader; import android.support.v4.widget.DrawerLayout; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.support.v7.widget.Toolbar; 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.ImageButton; import android.widget.ImageView; import android.widget.ProgressBar; import android.widget.RelativeLayout; import android.widget.SearchView; import android.widget.TextView; import android.widget.Toast; import com.bumptech.glide.load.resource.bitmap.GlideBitmapDrawable; 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.OnFailureListener; import com.google.android.gms.tasks.OnSuccessListener; import com.google.firebase.auth.FirebaseAuth; import com.google.firebase.auth.FirebaseUser; import com.google.firebase.storage.StorageReference; import com.google.firebase.storage.UploadTask; import com.sinch.android.rtc.PushPair; import com.sinch.android.rtc.Sinch; import com.sinch.android.rtc.SinchClient; import com.sinch.android.rtc.calling.Call; import com.sinch.android.rtc.calling.CallClient; import com.sinch.android.rtc.calling.CallListener; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.text.SimpleDateFormat; import java.util.Date; import java.util.List; import edu.sfsu.csc780.chathub.R; import edu.sfsu.csc780.chathub.model.APIKeys; import edu.sfsu.csc780.chathub.model.ChatMessage; import edu.sfsu.csc780.chathub.model.ChathubSinchClientListener; import edu.sfsu.csc780.chathub.ui.utils.AudioUtil; import edu.sfsu.csc780.chathub.ui.utils.ChannelUtil; import edu.sfsu.csc780.chathub.ui.utils.MessageUtil; import edu.sfsu.csc780.chathub.ui.utils.DesignUtils; import edu.sfsu.csc780.chathub.ui.utils.MapLoader; import edu.sfsu.csc780.chathub.ui.utils.LocationUtils; import edu.sfsu.csc780.chathub.ui.fragments.ImageDialogFragment; import edu.sfsu.csc780.chathub.ui.utils.UserUtil; public class MainActivity extends AppCompatActivity implements GoogleApiClient.OnConnectionFailedListener, MessageUtil.MessageLoadListener { private static final String TAG = "MainActivity"; private static final int REQUEST_PICK_IMAGE = 1; public static final int REQUEST_PREFERENCES = 2; private static final int REQUEST_TAKE_PHOTO = 3; private static final int REQUEST_NEW_CHANNEL = 4; private static final int REQUEST_SEARCH = 5; public static final int MSG_LENGTH_LIMIT = 64; private static final double MAX_LINEAR_DIMENSION = 500.0; public static final String ANONYMOUS = "anonymous"; private String mUsername; private String mPhotoUrl; private SharedPreferences mSharedPreferences; private GoogleApiClient mGoogleApiClient; private FloatingActionButton mSendButton; private RecyclerView mMessageRecyclerView; private RecyclerView mNavRecyclerView; private LinearLayoutManager mLinearLayoutManager; private ProgressBar mProgressBar; private EditText mMessageEditText; private RelativeLayout mChannelAdd; private TextView mCurrChanTextView; private TextView mCallProgressTextView; // Firebase instance variables private FirebaseAuth mAuth; private FirebaseUser mUser; private FirebaseRecyclerAdapter<ChatMessage, MessageUtil.MessageViewHolder> mFirebaseAdapter; private SinchClient mSinchClient; private Call call; private boolean canCall = true; private Toolbar mToolBar; private ImageButton mImageButton; private ImageButton mPhotoButton; private DrawerLayout mDrawerLayout; private int mSavedTheme; private String mCurrentChannel; private ImageButton mLocationButton; private View.OnClickListener mImageClickListener = new View.OnClickListener() { @Override public void onClick(View v) { ImageView photoView = (ImageView) v.findViewById(R.id.messageImageView); // Only show the larger view in dialog if there's a image for the message if (photoView.getVisibility() == View.VISIBLE) { Bitmap bitmap = ((GlideBitmapDrawable) photoView.getDrawable()).getBitmap(); showPhotoDialog(ImageDialogFragment.newInstance(bitmap)); } } }; private View.OnClickListener mChannelClickListener = new View.OnClickListener() { @Override public void onClick(View view) { //Change channel here TextView channel = (TextView) view.findViewById(R.id.channelNameText); String channelName = ""; if (channel == null) { channel = (TextView) view.findViewById(R.id.username); channelName = UserUtil.parseUsername(mSharedPreferences.getString("username", "anonymous")) + "=" + channel.getText().toString(); } else { channelName = channel.getText().toString(); } SharedPreferences.Editor edit = mSharedPreferences.edit(); edit.putString("currentChannel", channelName); edit.apply(); setChannelPage(); } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); DesignUtils.applyColorfulTheme(this); setContentView(R.layout.activity_main); mProgressBar = (ProgressBar) findViewById(R.id.progressBar); mSharedPreferences = PreferenceManager.getDefaultSharedPreferences(this); // Set default username is anonymous. mUsername = ANONYMOUS; //Initialize Auth mAuth = FirebaseAuth.getInstance(); mUser = mAuth.getCurrentUser(); if (mUser == null) { startActivity(new Intent(this, SignInActivity.class)); finish(); return; } else { mUsername = mUser.getDisplayName(); if (mUser.getPhotoUrl() != null) { mPhotoUrl = mUser.getPhotoUrl().toString(); } } AudioUtil.startAudioListener(this); mSinchClient = Sinch.getSinchClientBuilder().context(getApplicationContext()) .applicationKey(APIKeys.SINCH_API_KEY).applicationSecret(APIKeys.SINCH_APP_SECRET) .environmentHost("sandbox.sinch.com") .userId(UserUtil.parseUsername(mSharedPreferences.getString("username", "anonymous"))).build(); mSinchClient.setSupportCalling(true); mCurrentChannel = mSharedPreferences.getString("currentChannel", "general"); mCurrChanTextView = (TextView) findViewById(R.id.currentChannelName); mCurrChanTextView.setText(ChannelUtil.getChannelDisplayName(mCurrentChannel, this)); mGoogleApiClient = new GoogleApiClient.Builder(this) .enableAutoManage(this /* FragmentActivity */, this /* OnConnectionFailedListener */) .addApi(Auth.GOOGLE_SIGN_IN_API).build(); // Initialize ProgressBar and RecyclerView. mMessageRecyclerView = (RecyclerView) findViewById(R.id.messageRecyclerView); mLinearLayoutManager = new LinearLayoutManager(this); mLinearLayoutManager.setStackFromEnd(true); mMessageRecyclerView.setLayoutManager(mLinearLayoutManager); mChannelAdd = (RelativeLayout) findViewById(R.id.channelAdd); mToolBar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(mToolBar); mToolBar.setTitleTextColor(Color.WHITE); mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout); mDrawerLayout.setStatusBarBackgroundColor(ContextCompat.getColor(this, R.color.colorPrimary)); mFirebaseAdapter = MessageUtil.getFirebaseAdapter(this, this, /* MessageLoadListener */ mLinearLayoutManager, mMessageRecyclerView, mImageClickListener); mMessageRecyclerView.setAdapter(mFirebaseAdapter); mProgressBar.setVisibility(ProgressBar.INVISIBLE); mMessageEditText = (EditText) findViewById(R.id.messageEditText); mMessageEditText.setFilters(new InputFilter[] { new InputFilter.LengthFilter(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 = (FloatingActionButton) findViewById(R.id.sendButton); mSendButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { // Send messages on click. mMessageRecyclerView.scrollToPosition(0); ChatMessage chatMessage = new ChatMessage(mMessageEditText.getText().toString(), mUsername, mPhotoUrl, mCurrentChannel); MessageUtil.send(chatMessage, MainActivity.this); mMessageEditText.setText(""); } }); mImageButton = (ImageButton) findViewById(R.id.shareImageButton); mImageButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { pickImage(); } }); mPhotoButton = (ImageButton) findViewById(R.id.cameraButton); mPhotoButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { dispatchTakePhotoIntent(); } }); mLocationButton = (ImageButton) findViewById(R.id.locationButton); mLocationButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { loadMap(); } }); mChannelAdd.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Intent intent = new Intent(MainActivity.this, ChannelSearchActivity.class); startActivityForResult(intent, REQUEST_NEW_CHANNEL); } }); SearchView jumpSearchView = (SearchView) findViewById(R.id.jumpSearch); int id = jumpSearchView.getContext().getResources().getIdentifier("android:id/search_src_text", null, null); TextView textView = (TextView) jumpSearchView.findViewById(id); textView.setTextColor(Color.WHITE); textView.setHintTextColor(Color.WHITE); jumpSearchView.setIconified(false); jumpSearchView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Toast.makeText(MainActivity.this, "Not implemented", Toast.LENGTH_SHORT).show(); } }); mNavRecyclerView = (RecyclerView) findViewById(R.id.navRecyclerView); LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this); mNavRecyclerView.setLayoutManager(linearLayoutManager); mNavRecyclerView.setAdapter(ChannelUtil.getFirebaseAdapterForUserChannelList(mChannelClickListener, mAuth.getCurrentUser().getDisplayName())); RecyclerView userListRecyclerView = (RecyclerView) findViewById(R.id.userListRecyclerView); LinearLayoutManager linearLayoutManager2 = new LinearLayoutManager(this); userListRecyclerView.setLayoutManager(linearLayoutManager2); userListRecyclerView.setAdapter(UserUtil.getFirebaseAdapterForUserList(mChannelClickListener)); Button voiceCallButton = (Button) findViewById(R.id.voiceCall); mCallProgressTextView = (TextView) findViewById(R.id.callinprogress); final AudioManager audioManager = (AudioManager) getApplicationContext() .getSystemService(Context.AUDIO_SERVICE); voiceCallButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { CallClient callClient = mSinchClient.getCallClient(); if (canCall) { call = callClient.callConference("General"); call.addCallListener(new CallListener() { @Override public void onCallProgressing(Call call) { //setVolumeControlStream(AudioManager.STREAM_VOICE_CALL); audioManager.adjustStreamVolume(AudioManager.STREAM_VOICE_CALL, AudioManager.ADJUST_RAISE, 10); Log.d("Call", "Call progressing"); } @Override public void onCallEstablished(Call call) { setVolumeControlStream(AudioManager.STREAM_VOICE_CALL); mCallProgressTextView.setVisibility(View.VISIBLE); Log.d("Call", "Calling now"); } @Override public void onCallEnded(Call call) { setVolumeControlStream(AudioManager.USE_DEFAULT_STREAM_TYPE); Log.d("Call", "Stopped calling"); mCallProgressTextView.setVisibility(View.INVISIBLE); } @Override public void onShouldSendPushNotification(Call call, List<PushPair> list) { Log.d("Call", "Push"); } }); } } }); Button endCallButton = (Button) findViewById(R.id.endCall); endCallButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { if (call != null) { call.hangup(); call = null; } } }); } private void dispatchTakePhotoIntent() { Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); // Ensure the implicit intent can be handled if (takePictureIntent.resolveActivity(getPackageManager()) != null) { startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO); } } private void setChannelPage() { mCurrentChannel = UserUtil.parseUsername(mSharedPreferences.getString("currentChannel", "general")); mFirebaseAdapter = MessageUtil.getFirebaseAdapter(MainActivity.this, MainActivity.this, /* MessageLoadListener */ mLinearLayoutManager, mMessageRecyclerView, mImageClickListener); mMessageRecyclerView.swapAdapter(mFirebaseAdapter, false); mCurrChanTextView.setText(ChannelUtil.getChannelDisplayName(mCurrentChannel, this)); mNavRecyclerView.swapAdapter(ChannelUtil.getFirebaseAdapterForUserChannelList(mChannelClickListener, mSharedPreferences.getString("username", "anonymous")), false); } @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(); LocationUtils.startLocationUpdates(this); if (mSinchClient == null) { return; } if (!mSinchClient.isStarted()) { mSinchClient.addSinchClientListener(new ChathubSinchClientListener()); mSinchClient.start(); } } @Override public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) { boolean isGranted = (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED); if (isGranted && requestCode == LocationUtils.REQUEST_CODE) { LocationUtils.startLocationUpdates(this); } else if (!isGranted || requestCode != AudioUtil.REQUEST_CODE) { canCall = false; } } @Override public void onDestroy() { super.onDestroy(); if (mSinchClient == null) { return; } if (mSinchClient.isStarted()) { mSinchClient.stopListeningOnActiveConnection(); mSinchClient.terminate(); } } @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: mAuth.signOut(); Auth.GoogleSignInApi.signOut(mGoogleApiClient); mUsername = ANONYMOUS; startActivity(new Intent(this, SignInActivity.class)); return true; case R.id.preferences_menu: mSavedTheme = DesignUtils.getPreferredTheme(this); Intent i = new Intent(this, PreferencesActivity.class); startActivityForResult(i, REQUEST_PREFERENCES); return true; case R.id.search: Intent intent = new Intent(this, MessageSearchActivity.class); startActivity(intent); 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(); } @Override public void onLoadComplete() { mProgressBar.setVisibility(ProgressBar.INVISIBLE); } private void pickImage() { // ACTION_OPEN_DOCUMENT is the intent to choose a file via the system's file browser Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT); // Filter to only show results that can be "opened" intent.addCategory(Intent.CATEGORY_OPENABLE); // Filter to show only images, using the image MIME data type. intent.setType("image/*"); startActivityForResult(intent, REQUEST_PICK_IMAGE); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); Log.d(TAG, "onActivityResult: request=" + requestCode + ", result=" + resultCode); if (requestCode == REQUEST_PICK_IMAGE && resultCode == Activity.RESULT_OK) { // Process selected image here // The document selected by the user won't be returned in the intent. // Instead, a URI to that document will be contained in the return intent // provided to this method as a parameter. // Pull that URI using resultData.getData(). if (data != null) { Uri uri = data.getData(); Log.i(TAG, "Uri: " + uri.toString()); // Resize if too big for messaging Bitmap bitmap = getBitmapForUri(uri); Bitmap resizedBitmap = scaleImage(bitmap); if (bitmap != resizedBitmap) { uri = savePhotoImage(resizedBitmap); } createImageMessage(uri); } else { Log.e(TAG, "Cannot get image for uploading"); } } else if (requestCode == REQUEST_TAKE_PHOTO && resultCode == RESULT_OK) { if (data != null && data.getExtras() != null) { Bundle extras = data.getExtras(); Bitmap imageBitmap = (Bitmap) extras.get("data"); Log.d(TAG, "imageBitmap size:" + imageBitmap.getByteCount()); createImageMessage(savePhotoImage(imageBitmap)); } else { Log.e(TAG, "Cannot get photo URI after taking photo"); } } else if (requestCode == REQUEST_PREFERENCES) { if (DesignUtils.getPreferredTheme(this) != mSavedTheme) { DesignUtils.applyColorfulTheme(this); this.recreate(); } } else if (requestCode == REQUEST_NEW_CHANNEL && resultCode == Activity.RESULT_OK) { setChannelPage(); } } private void createImageMessage(Uri uri) { if (uri == null) { Log.e(TAG, "Could not create image message with null uri"); return; } final StorageReference imageReference = MessageUtil.getImageStorageReference(mUser, uri); UploadTask uploadTask = imageReference.putFile(uri); // Register observers to listen for when task is done or if it fails uploadTask.addOnFailureListener(new OnFailureListener() { @Override public void onFailure(@NonNull Exception exception) { Log.e(TAG, "Failed to upload image message"); } }).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() { @Override public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) { ChatMessage chatMessage = new ChatMessage(mMessageEditText.getText().toString(), mUsername, mPhotoUrl, mCurrentChannel, imageReference.toString()); MessageUtil.send(chatMessage, MainActivity.this); mMessageEditText.setText(""); } }); } private Bitmap getBitmapForUri(Uri imageUri) { Bitmap bitmap = null; try { bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), imageUri); } catch (IOException e) { e.printStackTrace(); } return bitmap; } private Bitmap scaleImage(Bitmap bitmap) { int originalHeight = bitmap.getHeight(); int originalWidth = bitmap.getWidth(); double scaleFactor = MAX_LINEAR_DIMENSION / (double) (originalHeight + originalWidth); // We only want to scale down images, not scale upwards if (scaleFactor < 1.0) { int targetWidth = (int) Math.round(originalWidth * scaleFactor); int targetHeight = (int) Math.round(originalHeight * scaleFactor); return Bitmap.createScaledBitmap(bitmap, targetWidth, targetHeight, true); } else { return bitmap; } } private Uri savePhotoImage(Bitmap imageBitmap) { File photoFile = null; try { photoFile = createImageFile(); } catch (IOException e) { e.printStackTrace(); } if (photoFile == null) { Log.d(TAG, "Error creating media file"); return null; } try { FileOutputStream fos = new FileOutputStream(photoFile); imageBitmap.compress(Bitmap.CompressFormat.PNG, 90, fos); fos.close(); } catch (FileNotFoundException e) { Log.d(TAG, "File not found: " + e.getMessage()); } catch (IOException e) { Log.d(TAG, "Error accessing file: " + e.getMessage()); } return Uri.fromFile(photoFile); } private File createImageFile() throws IOException { // Create an image file name String timeStamp = new SimpleDateFormat("yyyyMMdd-HHmmss").format(new Date()); String imageFileNamePrefix = "chathub-" + timeStamp; File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES); File imageFile = File.createTempFile(imageFileNamePrefix, /* prefix */ ".jpg", /* suffix */ storageDir /* directory */ ); return imageFile; } private void loadMap() { Loader<Bitmap> loader = getSupportLoaderManager().initLoader(0, null, new LoaderManager.LoaderCallbacks<Bitmap>() { @Override public Loader<Bitmap> onCreateLoader(final int id, final Bundle args) { return new MapLoader(MainActivity.this); } @Override public void onLoadFinished(final Loader<Bitmap> loader, final Bitmap result) { mProgressBar.setVisibility(ProgressBar.INVISIBLE); mLocationButton.setEnabled(true); if (result == null) return; // Resize if too big for messaging Bitmap resizedBitmap = scaleImage(result); Uri uri = null; if (result != resizedBitmap) { uri = savePhotoImage(resizedBitmap); } else { uri = savePhotoImage(result); } createImageMessage(uri); } @Override public void onLoaderReset(final Loader<Bitmap> loader) { } }); mProgressBar.setVisibility(ProgressBar.VISIBLE); mLocationButton.setEnabled(false); loader.forceLoad(); } void showPhotoDialog(DialogFragment dialogFragment) { // DialogFragment.show() will take care of adding the fragment // in a transaction. We also want to remove any currently showing // dialog, so make our own transaction and take care of that here. FragmentTransaction ft = getSupportFragmentManager().beginTransaction(); android.support.v4.app.Fragment prev = getSupportFragmentManager().findFragmentByTag("dialog"); if (prev != null) { ft.remove(prev); } ft.addToBackStack(null); dialogFragment.show(ft, "dialog"); } }