├── README.md ├── app ├── .gitignore ├── build.gradle ├── proguard-rules.pro └── src │ ├── androidTest │ └── java │ │ └── stacktex │ │ └── mobin │ │ └── search │ │ └── countdowntimer │ │ └── ExampleInstrumentedTest.kt │ ├── main │ ├── AndroidManifest.xml │ ├── java │ │ └── stacktex │ │ │ └── mobin │ │ │ └── search │ │ │ └── countdowntimer │ │ │ ├── SimpleCountDownTimer.java │ │ │ ├── SimpleCountDownTimerKotlin.kt │ │ │ └── activity │ │ │ ├── Main2Activity.java │ │ │ └── MainActivity.kt │ └── res │ │ ├── drawable-v24 │ │ └── ic_launcher_foreground.xml │ │ ├── drawable │ │ └── ic_launcher_background.xml │ │ ├── layout │ │ └── activity_main.xml │ │ ├── mipmap-anydpi-v26 │ │ ├── ic_launcher.xml │ │ └── ic_launcher_round.xml │ │ ├── mipmap-hdpi │ │ ├── ic_launcher.png │ │ └── ic_launcher_round.png │ │ ├── mipmap-mdpi │ │ ├── ic_launcher.png │ │ └── ic_launcher_round.png │ │ ├── mipmap-xhdpi │ │ ├── ic_launcher.png │ │ └── ic_launcher_round.png │ │ ├── mipmap-xxhdpi │ │ ├── ic_launcher.png │ │ └── ic_launcher_round.png │ │ ├── mipmap-xxxhdpi │ │ ├── ic_launcher.png │ │ └── ic_launcher_round.png │ │ └── values │ │ ├── colors.xml │ │ ├── strings.xml │ │ └── styles.xml │ └── test │ └── java │ └── stacktex │ └── mobin │ └── search │ └── countdowntimer │ └── ExampleUnitTest.kt ├── build.gradle ├── gradle.properties ├── gradle └── wrapper │ └── gradle-wrapper.properties └── settings.gradle /README.md: -------------------------------------------------------------------------------- 1 | # Android CountDown Timer 2 | 3 | :alarm_clock: 4 | 5 | A simple countdown timer identical to [android.os.CountDownTimer](https://developer.android.com/reference/android/os/CountDownTimer) but with simplified usage and additional functionality to pause,resume and run in background. 6 | 7 | 8 | ## Features 9 | - Easy to use. 10 | - Dynamic delays. 11 | - Allows pause/resume/stop/restart. 12 | - Allows instant switch & run on background thread. 13 | - Allows timer pattern formatting. 14 | - Versions available for both Java & Kotlin. 15 | - Android only (Doesn't rely to work on any 3rd party library). 16 | - Its not a fixed dependency to be included in your project to increase redundancy. 17 | - Its flexible to be converted in any library/SDK or modular form as per your requirement. 18 | - Modifications/Enhancements can be made as required. 19 | - Highly decoupled,optimized and clean code. 20 | - No Obfuscation Required (Proguard/Dexguard). 21 | - Complete Documentation. 22 | - **It would be a part of your project while not implying any 3rd-party involvement.** 23 | 24 | ### How to use ? 25 | 26 | Just clone the project in Android Studio and run it. 27 | 28 | For details read more on [medium](https://android.jlelse.eu/countdown-timer-in-android-941aab8dc976). 29 | -------------------------------------------------------------------------------- /app/.gitignore: -------------------------------------------------------------------------------- 1 | /build 2 | -------------------------------------------------------------------------------- /app/build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'com.android.application' 2 | 3 | apply plugin: 'kotlin-android' 4 | 5 | apply plugin: 'kotlin-android-extensions' 6 | 7 | android { 8 | compileSdkVersion 29 9 | defaultConfig { 10 | applicationId "stacktex.mobin.search.countdowntimer" 11 | minSdkVersion 21 12 | targetSdkVersion 29 13 | versionCode 1 14 | versionName "1.0" 15 | testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner" 16 | } 17 | buildTypes { 18 | release { 19 | minifyEnabled false 20 | proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' 21 | } 22 | } 23 | compileOptions { 24 | sourceCompatibility = 1.8 25 | targetCompatibility = 1.8 26 | } 27 | } 28 | 29 | dependencies { 30 | implementation fileTree(dir: 'libs', include: ['*.jar']) 31 | implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version" 32 | implementation 'androidx.appcompat:appcompat:1.1.0' 33 | implementation 'androidx.core:core-ktx:1.1.0' 34 | implementation 'androidx.constraintlayout:constraintlayout:1.1.3' 35 | testImplementation 'junit:junit:4.12' 36 | androidTestImplementation 'androidx.test.ext:junit:1.1.1' 37 | androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0' 38 | } 39 | -------------------------------------------------------------------------------- /app/proguard-rules.pro: -------------------------------------------------------------------------------- 1 | # Add project specific ProGuard rules here. 2 | # You can control the set of applied configuration files using the 3 | # proguardFiles setting in build.gradle. 4 | # 5 | # For more details, see 6 | # http://developer.android.com/guide/developing/tools/proguard.html 7 | 8 | # If your project uses WebView with JS, uncomment the following 9 | # and specify the fully qualified class name to the JavaScript interface 10 | # class: 11 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview { 12 | # public *; 13 | #} 14 | 15 | # Uncomment this to preserve the line number information for 16 | # debugging stack traces. 17 | #-keepattributes SourceFile,LineNumberTable 18 | 19 | # If you keep the line number information, uncomment this to 20 | # hide the original source file name. 21 | #-renamesourcefileattribute SourceFile 22 | -------------------------------------------------------------------------------- /app/src/androidTest/java/stacktex/mobin/search/countdowntimer/ExampleInstrumentedTest.kt: -------------------------------------------------------------------------------- 1 | package stacktex.mobin.search.countdowntimer 2 | 3 | import androidx.test.ext.junit.runners.AndroidJUnit4 4 | import androidx.test.platform.app.InstrumentationRegistry 5 | import org.junit.Assert.assertEquals 6 | import org.junit.Test 7 | import org.junit.runner.RunWith 8 | 9 | /** 10 | * Instrumented test, which will execute on an Android device. 11 | * 12 | * See [testing documentation](http://d.android.com/tools/testing). 13 | */ 14 | @RunWith(AndroidJUnit4::class) 15 | class ExampleInstrumentedTest { 16 | @Test 17 | fun useAppContext() { 18 | // Context of the app under test. 19 | val appContext = InstrumentationRegistry.getInstrumentation().targetContext 20 | assertEquals("stacktex.mobin.search.countdowntimer", appContext.packageName) 21 | } 22 | } 23 | -------------------------------------------------------------------------------- /app/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 5 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | -------------------------------------------------------------------------------- /app/src/main/java/stacktex/mobin/search/countdowntimer/SimpleCountDownTimer.java: -------------------------------------------------------------------------------- 1 | package stacktex.mobin.search.countdowntimer; 2 | 3 | import android.os.Handler; 4 | import android.os.HandlerThread; 5 | 6 | import org.jetbrains.annotations.NotNull; 7 | 8 | import java.text.SimpleDateFormat; 9 | import java.util.Calendar; 10 | import java.util.Locale; 11 | import java.util.concurrent.TimeUnit; 12 | 13 | /** 14 | * A simple countdown timer identical to android.os.CountDownTimer but with simplified usage and additional functionality to pause and resume. 15 | * Note: This timer runs on UI thread by default but that can be changed by calling runOnBackgroundThread at any time. 16 | * @author Mobin Munir 17 | */ 18 | public final class SimpleCountDownTimer { 19 | private OnCountDownListener onCountDownListener; 20 | private long fromMinutes; 21 | private long fromSeconds; 22 | private long delayInSeconds = 1; 23 | private Calendar calendar = Calendar.getInstance(); 24 | private long seconds, minutes; 25 | private boolean finished; 26 | private Handler handler = new Handler(); 27 | private HandlerThread handlerThread; 28 | private boolean isBackgroundThreadRunning; 29 | private SimpleDateFormat simpleDateFormat = new SimpleDateFormat("mm:ss", Locale.getDefault()); 30 | private Runnable runnable = this::decrementMinutes; 31 | 32 | /** 33 | * @param fromMinutes minutes to countdown. 34 | * @param fromSeconds seconds to countdown. 35 | * @param onCountDownListener A listener for countdown ticks. 36 | * @param delayInSeconds optional delay in seconds for a tick to execute default is 1 second. 37 | */ 38 | public SimpleCountDownTimer(long fromMinutes, long fromSeconds, long delayInSeconds, OnCountDownListener onCountDownListener) { 39 | 40 | if (fromMinutes <= 0 && fromSeconds <= 0) 41 | throw new IllegalStateException(getClass().getSimpleName() + " can't work in state 0:00"); 42 | 43 | if (delayInSeconds > 1) 44 | this.delayInSeconds = delayInSeconds; 45 | 46 | this.onCountDownListener = onCountDownListener; 47 | 48 | 49 | setCountDownValues(fromMinutes, fromSeconds); 50 | 51 | 52 | } 53 | 54 | /** 55 | * This method sets business logic for countdown operation before it starts. 56 | */ 57 | private void setCountDownValues(long fromMinutes, long fromSeconds) { 58 | this.fromMinutes = fromMinutes; 59 | this.fromSeconds = fromSeconds; 60 | minutes = this.fromMinutes; 61 | 62 | if (fromMinutes > 0 && fromSeconds <= 0) { 63 | seconds = 0; 64 | return; 65 | } 66 | 67 | if (fromSeconds <= 0 || fromSeconds > 59) { 68 | seconds = 59; 69 | return; 70 | } 71 | 72 | seconds = this.fromSeconds; 73 | 74 | } 75 | 76 | 77 | /** 78 | * @return This method returns seconds till countdown. 79 | */ 80 | public long getSecondsTillCountDown() { 81 | return seconds; 82 | } 83 | 84 | /** 85 | * @return This method returns minutes till countdown. 86 | */ 87 | public long getMinutesTillCountDown() { 88 | return minutes; 89 | } 90 | 91 | /** 92 | * Sets a new pattern for SimpleDateFormat for time returned on each tick. 93 | * 94 | * @param pattern only acceptable "mm:ss","m:s","mm","ss","m","s". 95 | */ 96 | 97 | public void setTimerPattern(String pattern) { 98 | if (pattern.equalsIgnoreCase("mm:ss") || pattern.equalsIgnoreCase("m:s") || pattern.equalsIgnoreCase("mm") || 99 | pattern.equalsIgnoreCase("ss") || pattern.equalsIgnoreCase("m") || pattern.equalsIgnoreCase("s")) 100 | simpleDateFormat.applyPattern(pattern); 101 | } 102 | 103 | /** 104 | * This method call will permanently move the timer to run in background thread for this instance. 105 | * A new thread is created which is then bound to timer's handler of main thread's message queue therefore overwriting it. 106 | * This method can be invoked at any time. 107 | * Note: onCountDownListener callbacks will not be invoked on main thread. 108 | */ 109 | public final void runOnBackgroundThread() { 110 | 111 | if (isBackgroundThreadRunning) 112 | return; 113 | 114 | handlerThread = new HandlerThread(getClass().getSimpleName()); 115 | 116 | startBackgroundThreadIfNotRunningAndEnabled(); 117 | 118 | handler = new Handler(handlerThread.getLooper()); 119 | 120 | 121 | } 122 | 123 | private void startBackgroundThreadIfNotRunningAndEnabled() { 124 | if (handlerThread != null && !handlerThread.isAlive()) { 125 | handlerThread.start(); 126 | isBackgroundThreadRunning = true; 127 | } 128 | } 129 | 130 | /** 131 | * No need to quit background thread once started. 132 | * Quitting it kills it. Threads don't restart. 133 | * This is just left here if needed for any reason in future. 134 | */ 135 | /* private void quitBackgroundThreadSafelyIfRunning() { 136 | 137 | if (!isBackgroundThreadRunning) 138 | return; 139 | 140 | isBackgroundThreadRunning = !handlerThread.quitSafely(); 141 | }*/ 142 | @NotNull 143 | private String getCountDownTime() { 144 | calendar.set(Calendar.MINUTE, (int) minutes); 145 | calendar.set(Calendar.SECOND, (int) seconds); 146 | return simpleDateFormat.format(calendar.getTime()); 147 | } 148 | 149 | private void decrementMinutes() { 150 | 151 | seconds--; 152 | 153 | if (minutes == 0 && seconds == 0) { 154 | finish(); 155 | } 156 | 157 | if (seconds < 0) { 158 | if (minutes > 0) { 159 | seconds = 59; 160 | minutes--; 161 | } 162 | 163 | } 164 | 165 | 166 | runCountdown(); 167 | 168 | 169 | } 170 | 171 | private void finish() { 172 | onCountDownListener.onCountDownFinished(); 173 | finished = true; 174 | pause(); 175 | } 176 | 177 | private void decrementSeconds() { 178 | handler.postDelayed(runnable, TimeUnit.SECONDS.toMillis(delayInSeconds)); 179 | 180 | } 181 | 182 | /** 183 | * A method to start/resume countdown. 184 | * 185 | * @param resume if true it will resume from where its paused else from start. 186 | */ 187 | public final void start(boolean resume) { 188 | 189 | if (!resume) { 190 | setCountDownValues(fromMinutes, fromSeconds); 191 | finished = false; 192 | } 193 | 194 | runCountdown(); 195 | 196 | 197 | } 198 | 199 | private void runCountdown() { 200 | if (!finished) { 201 | updateUI(); 202 | decrementSeconds(); 203 | } 204 | } 205 | 206 | private void updateUI() { 207 | onCountDownListener.onCountDownActive(getCountDownTime()); 208 | } 209 | 210 | /** 211 | * A method to pause/stop countdown. 212 | */ 213 | public final void pause() { 214 | handler.removeCallbacks(runnable); 215 | } 216 | 217 | /** 218 | * A countdown listener to be used to listen for ticks and finish. 219 | */ 220 | public interface OnCountDownListener { 221 | /** 222 | * A method continuously called on ticking. 223 | * 224 | * @param time The time at tick. 225 | */ 226 | void onCountDownActive(String time); 227 | 228 | /** 229 | * A method called once when countdown is finished. 230 | */ 231 | void onCountDownFinished(); 232 | } 233 | } 234 | -------------------------------------------------------------------------------- /app/src/main/java/stacktex/mobin/search/countdowntimer/SimpleCountDownTimerKotlin.kt: -------------------------------------------------------------------------------- 1 | package stacktex.mobin.search.countdowntimer 2 | 3 | import android.os.Handler 4 | import android.os.HandlerThread 5 | import java.text.SimpleDateFormat 6 | import java.util.* 7 | import java.util.concurrent.TimeUnit 8 | 9 | /** 10 | * A simple countdown timer identical to android.os.CountDownTimer but with simplified usage and additional functionality to pause and resume. 11 | * @param fromMinutes minutes to countdown. 12 | * @param fromSeconds seconds to countdown. 13 | * @param onCountDownListener A listener for countdown ticks. 14 | * @param delayInSeconds optional delay in seconds for a tick to execute default is 1 second. 15 | * Note: This timer runs on UI thread by default but that can be changed by calling runOnBackgroundThread at any time. 16 | * @author Mobin Munir 17 | */ 18 | class SimpleCountDownTimerKotlin( 19 | private var fromMinutes: Long, 20 | private var fromSeconds: Long, 21 | private val onCountDownListener: OnCountDownListener, 22 | private var delayInSeconds: Long = 1 23 | ) { 24 | 25 | private val calendar = Calendar.getInstance() 26 | private var seconds = 0L 27 | private var minutes = 0L 28 | private var finished = false 29 | private var handler = Handler() 30 | private var handlerThread: HandlerThread? = null 31 | private var isBackgroundThreadRunning = false 32 | private val simpleDateFormat = SimpleDateFormat("mm:ss", Locale.getDefault()) 33 | private val runnable = Runnable { decrementMinutes() } 34 | 35 | init { 36 | check(!(fromMinutes <= 0 && fromSeconds <= 0)) { javaClass.simpleName + " can't work in state 0:00" } 37 | 38 | if (delayInSeconds <= 0) 39 | delayInSeconds = 1 40 | 41 | setCountDownValues() 42 | } 43 | 44 | /** 45 | * This method sets business logic for countdown operation before it starts. 46 | */ 47 | private fun setCountDownValues( 48 | fromMinutes: Long = this.fromMinutes, 49 | fromSeconds: Long = this.fromSeconds 50 | ) { 51 | this.fromMinutes = fromMinutes 52 | this.fromSeconds = fromSeconds 53 | minutes = this.fromMinutes 54 | 55 | if (fromMinutes > 0 && fromSeconds <= 0) { 56 | seconds = 0 57 | return 58 | } 59 | 60 | if (fromSeconds <= 0 || fromSeconds > 59) { 61 | seconds = 59 62 | return 63 | } 64 | seconds = this.fromSeconds 65 | } 66 | 67 | /** 68 | * @return This method returns seconds till countdown. 69 | */ 70 | fun getSecondsTillCountDown() = seconds 71 | 72 | 73 | /** 74 | * @return This method returns minutes till countdown. 75 | */ 76 | fun getMinutesTillCountDown() = minutes 77 | 78 | 79 | /** 80 | * Sets a new pattern for SimpleDateFormat for time returned on each tick. 81 | * @param pattern only acceptable "mm:ss","m:s","mm","ss","m","s". 82 | */ 83 | fun setTimerPattern(pattern: String) { 84 | if (pattern.equals("mm:ss", ignoreCase = true) || pattern.equals( 85 | "m:s", 86 | ignoreCase = true 87 | ) || pattern.equals("mm", ignoreCase = true) || 88 | pattern.equals("ss", ignoreCase = true) || pattern.equals( 89 | "m", 90 | ignoreCase = true 91 | ) || pattern.equals("s", ignoreCase = true) 92 | ) simpleDateFormat.applyPattern(pattern) 93 | } 94 | 95 | /** 96 | * This method call will permanently move the timer to run in background thread for this instance. 97 | * A new thread is created which is then bound to timer's handler of main thread's message queue therefore overwriting it. 98 | * This method can be invoked at any time. 99 | * Note: onCountDownListener callbacks will not be invoked on main thread. 100 | */ 101 | fun runOnBackgroundThread() { 102 | if (isBackgroundThreadRunning) return 103 | handlerThread = HandlerThread(javaClass.simpleName) 104 | startBackgroundThreadIfNotRunningAndEnabled() 105 | handler = Handler(handlerThread!!.looper) 106 | } 107 | 108 | private fun startBackgroundThreadIfNotRunningAndEnabled() { 109 | 110 | handlerThread!!.run { 111 | start() 112 | isBackgroundThreadRunning = true 113 | } 114 | 115 | } 116 | 117 | private fun getCountDownTime(): String { 118 | calendar[Calendar.MINUTE] = minutes.toInt() 119 | calendar[Calendar.SECOND] = seconds.toInt() 120 | return simpleDateFormat.format(calendar.time) 121 | } 122 | 123 | private fun decrementMinutes() { 124 | seconds-- 125 | 126 | if (minutes == 0L && seconds == 0L) { 127 | finish() 128 | } 129 | 130 | if (seconds < 0L) { 131 | if (minutes > 0) { 132 | seconds = 59 133 | minutes-- 134 | } 135 | } 136 | 137 | 138 | runCountdown() 139 | } 140 | 141 | private fun finish() { 142 | onCountDownListener.onCountDownFinished() 143 | finished = true 144 | pause() 145 | } 146 | 147 | private fun decrementSeconds() { 148 | handler.postDelayed( 149 | runnable, 150 | TimeUnit.SECONDS.toMillis(delayInSeconds) 151 | ) 152 | } 153 | 154 | /** 155 | * A method to start/resume countdown. 156 | * 157 | * @param resume if true it will resume from where its paused else from start. 158 | */ 159 | fun start(resume: Boolean = false) { 160 | if (!resume) { 161 | setCountDownValues() 162 | finished = false 163 | } 164 | runCountdown() 165 | } 166 | 167 | private fun runCountdown() { 168 | if (!finished) { 169 | updateUI() 170 | decrementSeconds() 171 | } 172 | } 173 | 174 | private fun updateUI() { 175 | onCountDownListener.onCountDownActive(getCountDownTime()) 176 | } 177 | 178 | /** 179 | * A method to pause/stop countdown. 180 | */ 181 | fun pause() { 182 | handler.removeCallbacks(runnable) 183 | } 184 | 185 | /** 186 | * A countdown listener to be used to listen for ticks and finish. 187 | */ 188 | interface OnCountDownListener { 189 | /**A method continuously called on ticking. 190 | * @param time The time at tick. 191 | */ 192 | fun onCountDownActive(time: String) 193 | 194 | /** 195 | * A method called once when countdown is finished. 196 | */ 197 | fun onCountDownFinished() 198 | } 199 | } -------------------------------------------------------------------------------- /app/src/main/java/stacktex/mobin/search/countdowntimer/activity/Main2Activity.java: -------------------------------------------------------------------------------- 1 | package stacktex.mobin.search.countdowntimer.activity; 2 | 3 | import android.os.Bundle; 4 | import android.widget.Button; 5 | import android.widget.TextView; 6 | import android.widget.Toast; 7 | 8 | import androidx.appcompat.app.AppCompatActivity; 9 | 10 | import stacktex.mobin.search.countdowntimer.R; 11 | import stacktex.mobin.search.countdowntimer.SimpleCountDownTimer; 12 | 13 | public class Main2Activity extends AppCompatActivity implements SimpleCountDownTimer.OnCountDownListener { 14 | private TextView textView; 15 | private Button start; 16 | private Button resume; 17 | 18 | private final SimpleCountDownTimer simpleCountDownTimer = new SimpleCountDownTimer(0, 10, 1, this); 19 | 20 | @Override 21 | protected void onCreate(Bundle savedInstanceState) { 22 | super.onCreate(savedInstanceState); 23 | setContentView(R.layout.activity_main); 24 | textView = findViewById(R.id.tv); 25 | start = findViewById(R.id.startBtn); 26 | resume = findViewById(R.id.resumeBtn); 27 | Button pause = findViewById(R.id.pauseBtn); 28 | 29 | resume.setEnabled(false); 30 | 31 | start.setOnClickListener(view -> { 32 | simpleCountDownTimer.start(false); 33 | 34 | start.setEnabled(false); 35 | 36 | }); 37 | 38 | resume.setOnClickListener(view -> { 39 | simpleCountDownTimer.start(true); 40 | simpleCountDownTimer.runOnBackgroundThread(); 41 | }); 42 | pause.setOnClickListener(view -> { 43 | simpleCountDownTimer.pause(); 44 | simpleCountDownTimer.setTimerPattern("s"); 45 | resume.setEnabled(true); 46 | }); 47 | 48 | 49 | } 50 | 51 | 52 | @Override 53 | public void onCountDownActive(String time) { 54 | 55 | textView.post(() -> textView.setText(time)); 56 | 57 | Toast.makeText(this, "Seconds = " + simpleCountDownTimer.getSecondsTillCountDown() + " Minutes=" + simpleCountDownTimer.getMinutesTillCountDown(), Toast.LENGTH_SHORT).show(); 58 | 59 | } 60 | 61 | @Override 62 | public void onCountDownFinished() { 63 | textView.post(() -> { 64 | textView.setText("Finished"); 65 | start.setEnabled(true); 66 | resume.setEnabled(false); 67 | }); 68 | 69 | 70 | } 71 | } 72 | -------------------------------------------------------------------------------- /app/src/main/java/stacktex/mobin/search/countdowntimer/activity/MainActivity.kt: -------------------------------------------------------------------------------- 1 | package stacktex.mobin.search.countdowntimer.activity 2 | 3 | import android.os.Bundle 4 | import android.widget.Toast 5 | import androidx.appcompat.app.AppCompatActivity 6 | import kotlinx.android.synthetic.main.activity_main.* 7 | import stacktex.mobin.search.countdowntimer.R 8 | import stacktex.mobin.search.countdowntimer.SimpleCountDownTimerKotlin 9 | 10 | class MainActivity : AppCompatActivity(), 11 | SimpleCountDownTimerKotlin.OnCountDownListener { 12 | 13 | private val countDownTimer = 14 | SimpleCountDownTimerKotlin( 15 | 0, 16 | 10, 17 | this 18 | ) 19 | 20 | override fun onCreate(savedInstanceState: Bundle?) { 21 | super.onCreate(savedInstanceState) 22 | setContentView(R.layout.activity_main) 23 | 24 | resumeBtn.isEnabled = false 25 | 26 | startBtn.setOnClickListener { 27 | countDownTimer.start() 28 | 29 | startBtn.isEnabled = false 30 | } 31 | 32 | resumeBtn.setOnClickListener { 33 | countDownTimer.start(true) 34 | countDownTimer.runOnBackgroundThread() 35 | } 36 | 37 | pauseBtn.setOnClickListener { 38 | countDownTimer.pause() 39 | resumeBtn.isEnabled = true 40 | countDownTimer.setTimerPattern("s") 41 | } 42 | } 43 | 44 | override fun onCountDownActive(time: String) { 45 | 46 | runOnUiThread { 47 | 48 | tv.text = time 49 | 50 | Toast.makeText( 51 | this, 52 | "Seconds = " + countDownTimer.getSecondsTillCountDown() + " Minutes=" + countDownTimer.getMinutesTillCountDown(), 53 | Toast.LENGTH_SHORT 54 | ).show() 55 | } 56 | 57 | } 58 | 59 | override fun onCountDownFinished() { 60 | runOnUiThread { 61 | tv.text = "Finished" 62 | startBtn.isEnabled = true 63 | resumeBtn.isEnabled = false 64 | } 65 | 66 | } 67 | } 68 | -------------------------------------------------------------------------------- /app/src/main/res/drawable-v24/ic_launcher_foreground.xml: -------------------------------------------------------------------------------- 1 | 7 | 12 | 13 | 19 | 22 | 25 | 26 | 27 | 28 | 34 | 35 | -------------------------------------------------------------------------------- /app/src/main/res/drawable/ic_launcher_background.xml: -------------------------------------------------------------------------------- 1 | 2 | 7 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 55 | 60 | 65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 | 115 | 120 | 125 | 130 | 135 | 140 | 145 | 150 | 155 | 160 | 165 | 170 | 171 | -------------------------------------------------------------------------------- /app/src/main/res/layout/activity_main.xml: -------------------------------------------------------------------------------- 1 | 2 | 8 | 9 | 18 | 19 |