Android for Beginners: Score Keeper App

Readme.md

This is for Udacity's Android for Beginners Course submission for the Score Keeper App project. This app keeps the score for a single volleyball game and will announce the winner of the game once the winning score is reached.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<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"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/title_text_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:padding="10dp"
        android:text="@string/app_name"
        android:textSize="30sp" />

    <LinearLayout
        android:id="@+id/score_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/title_text_view"
        android:orientation="horizontal"
        android:paddingBottom="20dp">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:orientation="vertical">

            <TextView
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:fontFamily="sans-serif-medium"
                android:gravity="center"
                android:padding="8dp"
                android:text="Team A"
                android:textColor="@android:color/holo_red_dark"
                android:textSize="14dp" />

            <TextView
                android:id="@+id/team_a_score"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:fontFamily="sans-serif-light"
                android:gravity="center"
                android:padding="24dp"
                android:text="0"
                android:textColor="@android:color/black"
                android:textSize="56dp" />


            <Button
                android:id="@+id/team_a_miss"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="24dp"
                android:layout_marginRight="24dp"
                android:backgroundTint="@android:color/holo_blue_light"
                android:onClick="aAddScore"
                android:text="@string/miss" />

            <Button
                android:id="@+id/team_a_oob"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="24dp"
                android:layout_marginRight="24dp"
                android:backgroundTint="@android:color/holo_blue_light"
                android:onClick="aAddScore"
                android:text="@string/out_of_bounds" />


        </LinearLayout>

        <View
            android:layout_width="1dp"
            android:layout_height="match_parent"
            android:background="@android:color/holo_orange_dark">

        </View>


        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:orientation="vertical">


            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:fontFamily="sans-serif-medium"
                android:gravity="center"
                android:padding="8dp"
                android:text="Team B"
                android:textColor="@android:color/holo_blue_dark"
                android:textSize="14dp" />

            <TextView
                android:id="@+id/team_b_score"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:fontFamily="sans-serif-light"
                android:gravity="center"
                android:padding="24dp"
                android:text="0"
                android:textColor="@android:color/black"
                android:textSize="56dp" />

            <Button
                android:id="@+id/team_b_miss"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="24dp"
                android:layout_marginRight="24dp"
                android:backgroundTint="@android:color/holo_blue_light"
                android:onClick="bAddScore"
                android:text="@string/miss" />

            <Button
                android:id="@+id/team_b_oob"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="24dp"
                android:layout_marginRight="24dp"
                android:backgroundTint="@android:color/holo_blue_light"
                android:onClick="bAddScore"
                android:text="@string/out_of_bounds" />

        </LinearLayout>

    </LinearLayout>

    <TextView
        android:id="@+id/winner_box"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/score_view"
        android:gravity="center"
        android:padding="10dp"
        android:textSize="30sp"
        android:visibility="gone" />

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/winner_box"
        android:layout_centerHorizontal="true"
        android:padding="50dp"
        android:src="@drawable/volleyball" />

    <Button
        android:id="@+id/reset_button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:backgroundTint="@android:color/holo_blue_light"
        android:onClick="reset"
        android:text="Reset"
        android:textSize="20sp" />

</RelativeLayout>

MainActivity.java

package com.novembergave.apps.volleyballscorecounter;

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

public class MainActivity extends AppCompatActivity {

    Button mAMissButton;
    Button mAOOBButton;
    Button mBMissButton;
    Button mBOOBButton;
    TextView mWinnerTV;
    TextView mAScoreTV;
    TextView mBScoreTV;
    int TeamAScore;
    int TeamBScore;

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

        mAScoreTV = (TextView) findViewById(R.id.team_a_score);
        mBScoreTV = (TextView) findViewById(R.id.team_b_score);
        mWinnerTV = (TextView) findViewById(R.id.winner_box);

        mAMissButton = (Button) findViewById(R.id.team_a_miss);
        mAOOBButton = (Button) findViewById(R.id.team_a_oob);
        mBMissButton = (Button) findViewById(R.id.team_b_miss);
        mBOOBButton = (Button) findViewById(R.id.team_b_oob);

        TeamAScore = 0;
        TeamBScore = 0;
    }

    public void aAddScore(View v) {
        TeamAScore++;
        displayForTeamA(TeamAScore);
        // Checks if the team has won and if so, disable the buttons
        if ((TeamAScore >= 25) && ((TeamAScore - TeamBScore) >= 2)) {
            String winnerText = getString(R.string.team) + " " +
                    getString(R.string.a) + " " + getString(R.string.wins);
            mWinnerTV.setText(winnerText);
            mWinnerTV.setVisibility(View.VISIBLE);
            mAMissButton.setEnabled(false);
            mAOOBButton.setEnabled(false);
            mBMissButton.setEnabled(false);
            mBOOBButton.setEnabled(false);
        }
    }

    public void bAddScore(View v) {
        TeamBScore++;
        displayForTeamB(TeamBScore);
        // Checks if the team has won and if so, disable the buttons
        if ((TeamBScore >= 25) && ((TeamBScore - TeamAScore) >= 2)) {
            String winnerText = getString(R.string.team) + " " +
                    getString(R.string.b) + " " + getString(R.string.wins);
            mWinnerTV.setText(winnerText);
            mWinnerTV.setVisibility(View.VISIBLE);
            mAMissButton.setEnabled(false);
            mAOOBButton.setEnabled(false);
            mBMissButton.setEnabled(false);
            mBOOBButton.setEnabled(false);
        }
    }

    public void reset(View v) {
        TeamAScore = 0;
        TeamBScore = 0;
        displayForTeamA(TeamAScore);
        displayForTeamB(TeamBScore);
        mWinnerTV.setVisibility(View.GONE);
        // Re-enable the buttons
        mAMissButton.setEnabled(true);
        mAOOBButton.setEnabled(true);
        mBMissButton.setEnabled(true);
        mBOOBButton.setEnabled(true);
    }

    /**
     * Displays the given score for Team A.
     */
    public void displayForTeamA(int score) {
        mAScoreTV.setText(String.valueOf(score));
    }

    /**
     * Displays the given score for Team B.
     */
    public void displayForTeamB(int score) {
        mBScoreTV.setText(String.valueOf(score));
    }

}