Firebase

Be comfortable with
– making a simple mobile application
– basic command line
– calling a web or cloud API

FriendlyChat
APP, DB, FILE

package com.google.firebase.xxxx.friendlychat;
public class FriendlyMessage {
	private String text;
	private String name;
	private String photoUrl;

	public FriendlyMessage(){
	}

	public FriendlyMessage(String text, String name, String photoUrl){
		this.text = text;
		this.name = name;
		this.photoUrl = photoUrl;
	}

	public String getText(){
		return text;
	}

	public void setText(string text){
		this.text = text;
	}

	public String getName(){
		return name;
	}

	public void setName(String name){
		this.name = name;
	}
	public String getPhotoUrl{
		return photoUrl;
	}

	public void setPhotoUrl(String photoUrl){
		this.photoUrl = photoUrl;
	}
}

package com.google.firebase.xxxx.friendlychat;

import android.os.Bundle;
import android.support.v7.app.AppCompactActivity;
import android.text.Editable;
import android.text.TextWatcher;
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.ListView;
import android.widget.ProgressBar;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends(Bundle savedInstanceState){
	super.onCreate(savedInstanceState);
	setContentView(R.layout.activity_main);

	mUsername = ANONYMOUS;

	mProgressBar = (ProgressBar) findViewById(R.id.progressBar);
	mMessageListView = (ListView) findViewById(R.id.messageListView);
	mPhotoPickerButton = (ImageButton) findViewById(R.id.photoPickerButton);
	mMessageEditText = (EditText) findViewById(R.id.messageEditText);
	mSendButton = (Button) findViewById(R.id.sendButton);

	List<FriendlyMessage> friendlyMessages = new ArrayList<>();
	mMessageAdapter = new MessageAdapter(this, R.layout.item_message, friendlyMessages);
	mMessageListView.setAdapter(mMessageAdapter);

	mProgressBar.setVisibility(ProgressBar.INVISIBLE);

	mPhotoPickerButton.setOnClickListener(new View.OnClickListener(){
		@Override
		public void onClick(View view){

		}
	});

	mMessageEditText.addTextChangedListener(new TextWatcher(){
		@Override
		public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2){			
		}

		@Override
		public void onTestChanged(CharSequence charSequence, int i, int i1, int i2){
			if (charSequence.toString().trim().length() > 0){
				mSendButton.setEnable(true);
			} else {
				mSendButton.setEnabled(false);
			}
		}

		@Override
		public void afterTextChanged(Editable editable){
		}
	});
	mMessageEditText.setFilter(new InputFilter[]{new InputFilter.LengthFilter(DEFALT_MSG_LENGTH_LIMIT)});

	mSendButton.setOnClickListener(new View.OnClickListener(){
		@Override
		public void onClick(View view){
			mMessageEditText.setText("");
		}
	});

	@Override
	public boolean onCreateOptionsMenu(Menu menu){
		MenuInflater inflater = getMenuInflater();
		inflater.inflate(R.menu.main_menu, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item){
		return super.onOptionsItemSelected(item);
	}
}