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<?xml version="1.0" encoding="utf-8"?>
<!-- Business Card -->
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".BusinessCardActivity">

    <ImageView
        android:id="@+id/business_image_view"

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package com.example.android.cookies

import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.view.View
import android.widget.ImageView
import android.widget.TextView

class MainActivity : AppCompatActivity() {

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/* Java */
public class Book  {
    private String title;
    private Long isbn;
    public Book(String title, Long isbn) {
        this.title = title;
        this.isbn = isbn;
    }
    public String getTitle() {
        return title;

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class ReportCard constructor(var name: String) {
    var englishGrade: Char? = null
    var mathGrade: String? = null
    var historyGrade: Int? = null
    var biologyGrade: Double? = null

    constructor(name: String, englishGrade: Char?, mathGrade: String?, historyGrade: Int?, biologyGrade: Double?) : this(name) {
        this.englishGrade = englishGrade
        this.mathGrade = mathGrade
        this.historyGrade = historyGrade

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package com.example.android.musicplayer

import android.media.MediaPlayer
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.widget.Toast
import kotlinx.android.synthetic.main.activity_main.*


class MainActivity : AppCompatActivity() {

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package com.example.android.lifecycle

import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.util.Log

// When the Activity first time loads the events called are:
// onCreate(), onStart(), onResume()

// When click on home button, the Activity goes to the background

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package com.example.android.texttospeech

import android.os.Build
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.speech.tts.TextToSpeech
import android.util.Log
import kotlinx.android.synthetic.main.activity_main.*
import java.util.*

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https://dev.to/aspittel/a-web-design-crash-course-from-one-non-designer-to-another-2o2m

Color

• Uses consistent colors throughout
• Uses non-clashing colors
• The color choice makes sense for the business purpose of the site

Text