Egg horn app.

app/.gitignore

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+/build

app/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 26
+    buildToolsVersion "26.0.1"
+    defaultConfig {
+        applicationId "com.example.tharunreddychinthala.eggtimer"
+        minSdkVersion 22
+        targetSdkVersion 26
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    compile fileTree(dir: 'libs', include: ['*.jar'])
+    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
+        exclude group: 'com.android.support', module: 'support-annotations'
+    })
+    compile 'com.android.support:appcompat-v7:26.+'
+    compile 'com.android.support.constraint:constraint-layout:1.0.2'
+    testCompile 'junit:junit:4.12'
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in /Users/tharunreddychinthala/Library/Android/sdk/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/androidTest/java/com/example/tharunreddychinthala/eggtimer/ExampleInstrumentedTest.java

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+package com.example.tharunreddychinthala.eggtimer;
+
+import android.content.Context;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumentation test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() throws Exception {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getTargetContext();
+
+        assertEquals("com.example.tharunreddychinthala.eggtimer", appContext.getPackageName());
+    }
+}

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.tharunreddychinthala.eggtimer">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity android:name=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/com/example/tharunreddychinthala/eggtimer/MainActivity.java

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+package com.example.tharunreddychinthala.eggtimer;
+
+import android.content.Context;
+import android.media.MediaPlayer;
+import android.os.Bundle;
+import android.os.CountDownTimer;
+import android.support.v7.app.AppCompatActivity;
+import android.view.View;
+import android.widget.Button;
+import android.widget.SeekBar;
+import android.widget.TextView;
+
+public class MainActivity extends AppCompatActivity {
+
+    // Max time in timer is 10 min or 600 sec.
+    private static final int MAX_SEC = 600;
+    // Seconds in min 60.
+    private static final int SECONDS_IN_MIN = 60;
+    // Base Unit is sec in millsec
+    private static final int BASE_TIME_UNIT = 1000;
+    // Default Time in sec.
+    private static final int DEFAULT_TIME = 30;
+    private static final String GO = "GO";
+    private static final String STOP = "STOP";
+    private static String CLOCK_VIEW_STRING = "%s:%s";
+
+    // previousEggClockState : true - Go
+    // previousEggClockState : false - Stop
+    private boolean previousEggClockState = false;
+
+    private CountDownTimer countDownTimer;
+
+    // current time remaining in timer.
+    private int timerTime;
+
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        setOnClickListnerForSeekBar();
+        setSeekBarMax(MAX_SEC);
+        setSeekBar(DEFAULT_TIME);
+        setEggTimerButtonStateToGo();
+    }
+
+    private void setOnClickListnerForSeekBar() {
+        SeekBar seekBar = getEggSeekBar();
+        seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
+            @Override
+            public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
+                setClockTextView(seekBar.getProgress());
+            }
+
+            @Override
+            public void onStartTrackingTouch(SeekBar seekBar) {
+                // Do Nothing.
+            }
+
+            @Override
+            public void onStopTrackingTouch(SeekBar seekBar) {
+                // Do Nothing.
+            }
+        });
+    }
+
+    /**
+     * Will stopState the timer to 30.
+     */
+    public void reset(View view) {
+        if (previousEggClockState) {
+            // When the button if click to Go.
+            stopState();
+        } else {
+            goState();
+        }
+    }
+
+    private void goState() {
+        previousEggClockState = true;
+        timerTime = getSeekBarProgress();
+        setClockTextView(timerTime);
+
+        setEggTimerButtonStateToStop();
+
+        startCountDown(timerTime);
+
+        disableSeekBar();
+    }
+
+
+    private void stopState() {
+        previousEggClockState = false;
+        setSeekBar(DEFAULT_TIME);
+        setClockTextView(DEFAULT_TIME);
+        setEggTimerButtonStateToGo();
+
+        stopCountDown();
+
+        enableSeekBar();
+    }
+
+    private void startCountDown(int eggClockTimeInSec) {
+        final Context context = this;
+        final int eggClockTimeInMilliSec = eggClockTimeInSec * BASE_TIME_UNIT;
+        countDownTimer = new CountDownTimer(eggClockTimeInMilliSec, BASE_TIME_UNIT) {
+            @Override
+            public void onTick(long l) {
+                timerTime--;
+                setSeekBar(timerTime);
+                setClockTextView(timerTime);
+
+            }
+
+            @Override
+            public void onFinish() {
+                // Play sound.
+                final MediaPlayer mediaPlayer = MediaPlayer.create(context, R.raw.airhorn);
+                mediaPlayer.start();
+            }
+        };
+
+        countDownTimer.start();
+    }
+
+    private void stopCountDown() {
+        countDownTimer.cancel();
+    }
+
+
+    /**
+     * Takes the time in sec and converts that to min and sec and shows it in the text view.
+     * @param timeInSec time in seconds.
+     */
+    private void setClockTextView(int timeInSec) {
+        int min = timeInSec/60;
+
+        String eggTimer = String.format(CLOCK_VIEW_STRING,
+                getRemainingMin(timeInSec), getRemainingSecInDoubleDigit(timeInSec));;
+
+        TextView eggTimerClock = (TextView) findViewById(R.id.eggTimerClock);
+
+        eggTimerClock.setText(eggTimer);
+    }
+
+    private String getRemainingMin(int timeInSec) {
+        return String.valueOf(timeInSec/60);
+    }
+
+    /**
+     * Will give the sec after removeing the min.
+     * @param timeInSec time in seconds
+     * @return remaining sec after min are removed.
+     */
+    private String getRemainingSecInDoubleDigit(int timeInSec) {
+        int remainingSec = timeInSec%60;
+        if (remainingSec < 10) {
+            return String.format("0" + remainingSec);
+        } else {
+            return String.valueOf(remainingSec);
+        }
+    }
+
+    /**
+     * Will set the eggTimerSeekBar to given progress.
+     * @param progress progress
+     */
+    private void setSeekBar(int progress) {
+        getEggSeekBar().setProgress(progress);
+    }
+
+    private void setSeekBarMax(int progress) {
+        getEggSeekBar().setMax(progress);
+    }
+
+    private int getSeekBarProgress() {
+        return getEggSeekBar().getProgress();
+    }
+
+    private void setEggTimerButtonStateToGo() {
+        getEggTimerButton().setText(GO);
+    }
+
+    private void setEggTimerButtonStateToStop() {
+        getEggTimerButton().setText(STOP);
+    }
+
+    private void disableSeekBar() {
+        getEggSeekBar().setEnabled(false);
+    }
+
+    private void enableSeekBar() {
+        getEggSeekBar().setEnabled(true);
+    }
+
+    private Button getEggTimerButton() {
+        return (Button) findViewById(R.id.eggTimerButton);
+    }
+
+    private SeekBar getEggSeekBar() {
+        return (SeekBar) findViewById(R.id.eggTimerSeekBar);
+    }
+}

app/src/main/res/layout/activity_main.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context="com.example.tharunreddychinthala.eggtimer.MainActivity">
+
+    <SeekBar
+        android:id="@+id/eggTimerSeekBar"
+        android:layout_width="368dp"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="8dp"
+        android:layout_marginLeft="8dp"
+        android:layout_marginRight="8dp"
+        android:layout_marginTop="8dp"
+        app:layout_constraintBottom_toTopOf="@+id/eggTimerImage"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <ImageView
+        android:id="@+id/eggTimerImage"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="16dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:srcCompat="@drawable/eggtimer"
+        android:layout_marginRight="8dp"
+        app:layout_constraintRight_toRightOf="parent"
+        android:layout_marginLeft="8dp"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintHorizontal_bias="0.0"
+        app:layout_constraintTop_toTopOf="parent"
+        android:layout_marginTop="8dp"
+        app:layout_constraintVertical_bias="1.0" />
+
+    <TextView
+        android:id="@+id/eggTimerClock"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="8dp"
+        android:layout_marginLeft="8dp"
+        android:layout_marginRight="8dp"
+        android:layout_marginTop="170dp"
+        android:background="@color/colorAccent"
+        android:text="0:30"
+        android:textSize="36sp"
+        app:layout_constraintBottom_toTopOf="@+id/eggTimerButton"
+        app:layout_constraintLeft_toLeftOf="@+id/eggTimerImage"
+        app:layout_constraintRight_toRightOf="@+id/eggTimerImage"
+        app:layout_constraintTop_toTopOf="@+id/eggTimerImage"
+        app:layout_constraintVertical_bias="0.017" />
+
+    <Button
+        android:id="@+id/eggTimerButton"
+        style="@style/Widget.AppCompat.Button.ButtonBar.AlertDialog"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="8dp"
+        android:layout_marginLeft="8dp"
+        android:layout_marginRight="8dp"
+        android:layout_marginTop="8dp"
+        android:background="@android:color/black"
+        android:onClick="reset"
+        android:text="Go"
+        app:layout_constraintBottom_toBottomOf="@+id/eggTimerImage"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toTopOf="@+id/eggTimerImage"
+        app:layout_constraintVertical_bias="0.94" />
+</android.support.constraint.ConstraintLayout>

app/src/main/res/values/colors.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#3F51B5</color>
+    <color name="colorPrimaryDark">#303F9F</color>
+    <color name="colorAccent">#ff4081</color>
+</resources>

app/src/main/res/values/strings.xml

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+<resources>
+    <string name="app_name">EggTimer</string>
+</resources>