Initial commit

.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

app/.gitignore

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+/build

app/build.gradle

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+plugins {
+    id 'com.android.application'
+    id 'kotlin-android'
+}
+
+android {
+    compileSdkVersion 30
+    buildToolsVersion "30.0.0"
+
+    defaultConfig {
+        applicationId "com.sample.easyworkmanager"
+        minSdkVersion 16
+        targetSdkVersion 30
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+}
+
+dependencies {
+
+    implementation project(':workmanager')
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    implementation 'androidx.core:core-ktx:1.3.1'
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'com.google.android.material:material:1.2.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.1'
+    testImplementation 'junit:junit:4.13'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+    implementation 'com.squareup.okhttp3:okhttp:4.8.1'
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# 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/sample/easyworkmanager/ExampleInstrumentedTest.kt

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+package com.sample.easyworkmanager
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("com.sample.easyworkmanager", appContext.packageName)
+    }
+}

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.sample.easyworkmanager">
+
+    <uses-permission android:name="android.permission.INTERNET"/>
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:usesCleartextTraffic="true"
+        android:theme="@style/Theme.EasyWorkManager">
+        <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/sample/easyworkmanager/MainActivity.kt

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+package com.sample.easyworkmanager
+
+import android.os.Build
+import android.os.Bundle
+import android.util.Log
+import androidx.annotation.RequiresApi
+import androidx.appcompat.app.AppCompatActivity
+import com.library.workmanager.ITaskExecutionCallback
+import com.library.workmanager.TaskScheduler
+import com.library.workmanager.WorkType
+import java.net.HttpURLConnection
+import java.net.URL
+
+class MainActivity : AppCompatActivity(),ITaskExecutionCallback {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        val min=20*60000
+        setContentView(R.layout.activity_main)
+
+        //Build Task scheduler with different options.
+        TaskScheduler.Builder(this,this).
+        setListener(this).setWorkType(WorkType.PERIODIC)
+            .setPeriodicTime(min.toLong()).build()
+    }
+
+    override fun onTaskExecutionInProgress() {
+        Log.e("MainActivity","onTaskExecutionInProgress...")
+    }
+
+    override fun onTaskExecutionCompleted() {
+        Log.e("MainActivity","onTaskExecutionCompleted.")
+    }
+
+    override fun onTaskExecutionFailed() {
+        Log.e("MainActivity","onTaskExecutionFailed.")
+    }
+
+    @RequiresApi(Build.VERSION_CODES.N)
+    override fun startBackgroundTask() {
+        Log.e("MainActivity","startBackgroundTask.")
+        fetchDataFromApi()
+    }
+
+    /**
+     * Sample api call needs to be called on @startBackgroundTask().
+     */
+    @RequiresApi(Build.VERSION_CODES.N)
+    fun fetchDataFromApi() {
+        val url = URL("http://www.google.com/")
+
+        with(url.openConnection() as HttpURLConnection) {
+            // optional default is GET
+            requestMethod = "GET"
+
+            println("\nSent 'GET' request to URL : $url; Response Code : $responseCode")
+
+            inputStream.bufferedReader().use {
+                //To use this we @RequiresApi(Build.VERSION_CODES.N)
+                it.lines().forEach { line ->
+                    Log.e("MainActivity",line)
+                }
+            }
+        }
+    }
+
+}

app/src/main/java/com/sample/easyworkmanager/custom/CustomWorkManagerActivity.kt

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+package com.sample.easyworkmanager.custom
+
+import android.os.Build
+import android.os.Bundle
+import android.util.Log
+import androidx.annotation.RequiresApi
+import androidx.appcompat.app.AppCompatActivity
+import com.library.workmanager.ITaskExecutionCallback
+import com.library.workmanager.WorkType
+import com.sample.easyworkmanager.R
+import java.net.HttpURLConnection
+import java.net.URL
+
+class CustomWorkManagerActivity:AppCompatActivity(), ITaskExecutionCallback {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+
+        //Initialize your scheduler.
+        val ownTaskScheduler= OwnTaskScheduler(
+            this,
+            this,
+            this,
+            WorkType.CUSTOM
+        )
+        // call your request.
+        ownTaskScheduler.scheduleCustomRequest()
+    }
+
+    override fun onTaskExecutionInProgress() {
+        Log.e("CustMainActivity","onTaskExecutionInProgress...")
+    }
+
+    override fun onTaskExecutionCompleted() {
+        Log.e("CustMainActivity","onTaskExecutionCompleted.")
+    }
+
+    override fun onTaskExecutionFailed() {
+        Log.e("CustMainActivity","onTaskExecutionFailed.")
+    }
+
+    @RequiresApi(Build.VERSION_CODES.N)
+    override fun startBackgroundTask() {
+        Log.e("CustMainActivity","startBackgroundTask.")
+        fetchDataFromApi()
+    }
+
+    /**
+     * Sample api call needs to be called on @startBackgroundTask().
+     */
+    @RequiresApi(Build.VERSION_CODES.N)
+    fun fetchDataFromApi() {
+        val url = URL("http://www.google.com/")
+
+        with(url.openConnection() as HttpURLConnection) {
+            // optional default is GET
+            requestMethod = "GET"
+
+            println("\nSent 'GET' request to URL : $url; Response Code : $responseCode")
+
+            inputStream.bufferedReader().use {
+                //To use this we @RequiresApi(Build.VERSION_CODES.N)
+                it.lines().forEach { line ->
+                    Log.e("CustMainActivity",line)
+                }
+            }
+        }
+    }
+}

app/src/main/java/com/sample/easyworkmanager/custom/OwnTaskScheduler.kt

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+package com.sample.easyworkmanager.custom
+
+import android.content.Context
+import androidx.lifecycle.LifecycleOwner
+import androidx.work.Constraints
+import androidx.work.NetworkType
+import androidx.work.OneTimeWorkRequest
+import com.library.workmanager.BackGroundWorker
+import com.library.workmanager.ITaskExecutionCallback
+import com.library.workmanager.TaskScheduler
+import com.library.workmanager.WorkType
+
+/**
+ * Your own custom scheduler which can have other constraints and other type of work request.
+ * Just extend {TaskScheduler class}.
+ */
+class OwnTaskScheduler(
+    context: Context,
+    lifecycleOwner: LifecycleOwner,
+    iTaskExecutionCallback: ITaskExecutionCallback,
+    workType: WorkType
+) : TaskScheduler(context, lifecycleOwner, iTaskExecutionCallback, workType) {
+
+    private lateinit var oneTimeWorkRequest: OneTimeWorkRequest
+
+    //Your own constraints.
+    override var constraints: Constraints =
+        Constraints.Builder().setRequiredNetworkType(NetworkType.CONNECTED).build()
+
+    //Your own request type.
+    override fun scheduleCustomRequest() {
+        oneTimeWorkRequest =
+            OneTimeWorkRequest.Builder(BackGroundWorker::class.java)
+                .setConstraints(constraints)
+                .build()
+        workManager.enqueue(oneTimeWorkRequest)
+        //Set the callbacks to listen to changes.
+        listenToCallbacks(oneTimeWorkRequest.id)
+    }
+
+}