Day 30 - Firebase

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dependencies {
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    compile 'com.firebase:firebase-client:1.0.16+'
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}

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<uses-permission android:name="android.permission.INTERNET" />

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Firebase firebase = new Firebase("https://<your-firebase>.firebaseio.com/");

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firebase.child("message").setValue("Do you have data? You'll love Firebase.");

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firebase.child("message").addValueEventListener(new ValueEventListener() {
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  @Override
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  public void onDataChange(DataSnapshot snapshot) {
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    System.out.println(snapshot.getValue());  //prints "Do you have data? You'll love Firebase."
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  }
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  @Override public void onCancelled(FirebaseError error) { }
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});

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<?xml version="1.0" encoding="utf-8"?>
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<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
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              android:layout_width="match_parent"
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              android:layout_height="match_parent">
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    <ListView
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        android:layout_width="match_parent"
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        android:layout_height="match_parent"
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        android:layout_above="@+id/linear"
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        android:id="@+id/list_view" />
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    <LinearLayout android:id="@+id/linear"
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                  android:layout_width="match_parent"
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                  android:layout_height="wrap_content"
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                  android:layout_alignParentBottom="true"
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                  android:orientation="horizontal">
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        <EditText
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            android:id="@+id/message"
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            android:layout_height="wrap_content"
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            android:layout_width="wrap_content"
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            android:layout_weight="1"
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            android:lines="1"
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            android:inputType="textShortMessage"
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            android:singleLine="true" />
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        <ImageButton
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            android:id="@+id/button_send"
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            android:layout_height="wrap_content"
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            android:layout_width="wrap_content"
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            android:src="@android:drawable/ic_menu_send" />
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    </LinearLayout>
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</RelativeLayout>

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package com.devahoy.learn30androidlibraries.day30;
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import android.graphics.Color;
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import android.os.Bundle;
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import android.support.v7.app.ActionBarActivity;
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import android.view.View;
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import android.widget.ArrayAdapter;
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import android.widget.EditText;
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import android.widget.ImageButton;
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import android.widget.ListView;
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import com.devahoy.learn30androidlibraries.R;
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import com.firebase.client.ChildEventListener;
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import com.firebase.client.DataSnapshot;
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import com.firebase.client.Firebase;
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import com.firebase.client.FirebaseError;
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import com.firebase.client.Query;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.Random;
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public class FireBaseActivity extends ActionBarActivity {
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    private static final String AHOY_CHAT_URL = "https://ahoychat.firebaseio.com";
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    private List<String> mChats = new ArrayList<String>();
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    private ListView mListView;
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    private ArrayAdapter<String> mAdapter;
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    private ImageButton mButtonSend;
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    private EditText mMessage;
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    private Firebase mFirebase;
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    private String mUsername;
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    @Override
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    protected void onCreate(Bundle savedInstanceState) {
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        super.onCreate(savedInstanceState);
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        Random r = new Random();
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        mUsername = "AhoyUser" + r.nextInt(1000);
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        setContentView(R.layout.day30_activity_firebase);
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        mButtonSend = (ImageButton) findViewById(R.id.button_send);
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        mMessage = (EditText) findViewById(R.id.message);
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        mListView = (ListView) findViewById(R.id.list_view);
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        mListView.setBackgroundColor(Color.parseColor("#26B895"));
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        mFirebase = new Firebase(AHOY_CHAT_URL).child("chat");
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        queryData();
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        mButtonSend.setOnClickListener(new View.OnClickListener() {
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            @Override
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            public void onClick(View v) {
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                sendMessage();
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            }
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        });
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    }
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    private void sendMessage() {
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//        Chat chat = new Chat(mMessage.getText().toString(), mUsername);
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        Map<String, Object> chat = new HashMap<String, Object>();
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        chat.put("owner", mUsername);
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        chat.put("message", mMessage.getText().toString());
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        mFirebase.push().setValue(chat);
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        mMessage.setText("");
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    }
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    private void queryData() {
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        Query query = mFirebase.limit(10);
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        query.addChildEventListener(new ChildEventListener() {
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            @Override
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            public void onChildAdded(DataSnapshot dataSnapshot, String s) {
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                Map<String, Object> newPost = (Map<String, Object>) dataSnapshot.getValue();
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                String owner = newPost.get("owner").toString();
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                String message = newPost.get("message").toString();
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                mChats.add(0, owner + " Say: " + message);
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                if (mAdapter == null) {
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                    mAdapter = new ArrayAdapter<String>(getApplicationContext(),
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                            android.R.layout.simple_list_item_1, mChats);
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                    mListView.setAdapter(mAdapter);
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                }
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                mAdapter.notifyDataSetChanged();
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            }
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            @Override
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            public void onChildChanged(DataSnapshot dataSnapshot, String s) {
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                mAdapter.notifyDataSetChanged();
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            }
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            @Override
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            public void onChildRemoved(DataSnapshot dataSnapshot) {
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            }
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            @Override
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            public void onChildMoved(DataSnapshot dataSnapshot, String s) {
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            }
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            @Override
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            public void onCancelled(FirebaseError firebaseError) {
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            }
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        });
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    }
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}

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Map<String, Object> newPost = (Map<String, Object>) dataSnapshot.getValue();
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String owner = newPost.get("owner").toString();
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String message = newPost.get("message").toString();