MainActivity.java

package com.example.shamitha.pc_share;

import android.content.Intent;

import java.io.File;
import java.lang.String;
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.v4.content.FileProvider;
import android.support.v7.widget.LinearLayoutCompat;
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.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

import com.bumptech.glide.Glide;
import com.firebase.client.Firebase;
import com.firebase.client.FirebaseError;
import com.firebase.client.core.Context;
import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdView;
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.OnCompleteListener;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
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.ChildEventListener;
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.ValueEventListener;
import com.google.firebase.remoteconfig.FirebaseRemoteConfig;
import com.google.firebase.remoteconfig.FirebaseRemoteConfigSettings;
import com.google.firebase.appindexing.Action;
import com.google.firebase.appindexing.FirebaseAppIndex;
import com.google.firebase.appindexing.FirebaseUserActions;
import com.google.firebase.appindexing.Indexable;
import com.google.firebase.appindexing.builders.Indexables;
import com.google.firebase.appindexing.builders.PersonBuilder;
import com.google.firebase.storage.FirebaseStorage;
import com.google.firebase.storage.StorageReference;
import com.google.firebase.storage.UploadTask;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;

import de.hdodenhof.circleimageview.CircleImageView;

import static java.security.AccessController.getContext;

public class MainActivity extends AppCompatActivity {
    public Button mSendButton;
    public String mUsername="shamitha";
   public EditText mMessageEditText;
    private RecyclerView mMessageRecyclerView;
    private LinearLayoutManager mLinearLayoutManager;
    public DatabaseReference mFirebaseDatabaseReference;
    final int REQUEST_IMAGE=234;
    public String TAG="PC-Share";
    private static final String LOADING_IMAGE_URL = "https://www.google.com/images/spin-32.gif";



    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

    // New child entries
        Firebase.setAndroidContext(this);
       final Firebase myFirebaseRef = new Firebase("https://pc-share-6bc72.firebaseio.com/");


mFirebaseDatabaseReference=FirebaseDatabase.getInstance().getReference().child("messages");

      mSendButton = (Button) findViewById(R.id.sendButton);
        mMessageEditText=(EditText) findViewById(R.id.messageEditText);
        mSendButton.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View view)
            {
                FriendlyMessage friendlyMessage = new
                        FriendlyMessage(mMessageEditText.getText().toString(),mUsername);
                myFirebaseRef.child("messages").push().setValue(friendlyMessage);
                mMessageEditText.setText("");
            }
        });
        final ArrayList<String> arrayList=new ArrayList<String>();

        ArrayAdapter<String> arrayAdapter=new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,arrayList);

        ListView listView=(ListView) findViewById(R.id.listview);
        listView.setAdapter(arrayAdapter);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
                if (((String)arg0.getItemAtPosition(position)).startsWith("http")) {
                    Uri uri = Uri.parse((String) arg0.getItemAtPosition(position)); // missing 'http://' will crash the app
                    Intent intent = new Intent(Intent.ACTION_VIEW, uri);
                    startActivity(intent);
                }
                else if (((String)arg0.getItemAtPosition(position)).startsWith("content://"))
                {
                    Uri uri = Uri.parse((String) arg0.getItemAtPosition(position));

                    Intent intent = new Intent(Intent.ACTION_VIEW, uri);
                    startActivity(intent);
                }

            }
        });
        //Value event listener for realtime data update
        mFirebaseDatabaseReference.addChildEventListener(new ChildEventListener() {

            @Override
            public void onChildAdded(DataSnapshot snapshot,String prev) {

               FriendlyMessage friendlyMessage = snapshot.getValue(FriendlyMessage.class);
                    if(friendlyMessage.getText()!=null) {
                        //Adding it to a string
                        String string = "Message: " + friendlyMessage.getText() + "\nName: " + friendlyMessage.getName() + "\n\n";

                        //Displaying it on textview
                        arrayList.add(string);
                    }
                    else if(friendlyMessage.getImageurl()!=null)
                    {
                        String string = friendlyMessage.getImageurl();

                        //Displaying it on textview
                        arrayList.add(string);
                    }
                }
            @Override
            public void onChildChanged(DataSnapshot dataSnapshot, String prevChildKey) {}

            @Override
            public void onChildRemoved(DataSnapshot dataSnapshot) {}

            @Override
            public void onChildMoved(DataSnapshot dataSnapshot, String prevChildKey) {}

            @Override
            public void onCancelled(DatabaseError databaseError) {}

        });
        ImageView mAddMessageImageView;
        mAddMessageImageView = (ImageView) findViewById(R.id.addMessageImageView);
        mAddMessageImageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
                intent.addCategory(Intent.CATEGORY_OPENABLE);
                intent.setType("*/*");
                startActivityForResult(intent, REQUEST_IMAGE);
            }
        });

    }
    @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,uri.toString());
                    mFirebaseDatabaseReference.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()
                                                        .child(key)
                                                        .child(uri.getLastPathSegment());

                                        putImageInStorage(storageReference, uri, key);
                                    } else {
                                        Log.w(TAG, "Unable to write message to database.",
                                                databaseError.toException());
                                    }
                                }
                            });
                }
            }
        }
    }

    private void putImageInStorage(StorageReference storageReference, Uri uri, final String key) {
        storageReference.putFile(uri).addOnCompleteListener(MainActivity.this,
                new OnCompleteListener<UploadTask.TaskSnapshot>() {
                    @Override
                    public void onComplete(@NonNull Task<UploadTask.TaskSnapshot> task) {
                        if (task.isSuccessful()) {
                            FriendlyMessage friendlyMessage =
                                    new FriendlyMessage(null, mUsername,task.getResult().getMetadata().getDownloadUrl()
                                                    .toString());
                            mFirebaseDatabaseReference.child(key)
                                    .setValue(friendlyMessage);
                        } else {
                            Log.w(TAG, "Image upload task was not successful.",
                                    task.getException());
                        }
                    }
                });
    }
}