Use ViewBinding

Author: koji-1009

README.md

@@ -37,7 +37,7 @@ If you want to handle StudyplusSDK instance as a singleton, use [Dagger](https:/
 ```kotlin
 private val instance by lazy {
     Studyplus(
-        context = this@MainActivity,
+        context = this,
         consumerKey = "consumer_key",
         consumerSecret =  "consumer_secret",
     )
@@ -56,13 +56,15 @@ Then save the result.
 
 ```kotlin
 override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+    super.onActivityResult(requestCode, resultCode, data)
     if (resultCode != RESULT_OK || data == null) {
+        Toast.makeText(this, "error!!", Toast.LENGTH_LONG).show()
         return
     }
 
     if (requestCode == REQUEST_CODE_AUTH) {
         instance.setAuthResult(data)
-        Toast.makeText(this@MainActivity, "Success!!", Toast.LENGTH_LONG).show()
+        Toast.makeText(this, "Success!!", Toast.LENGTH_LONG).show()
     }
 }
 ```

sdk-example-kt/build.gradle

@@ -3,6 +3,11 @@ apply plugin: 'kotlin-android'
 
 android {
     compileSdkVersion versions.compileSdk
+
+    buildFeatures {
+        viewBinding true
+    }
+
     defaultConfig {
         applicationId "jp.studyplus.android.sdk_example_kt"
         minSdkVersion versions.minSdk
@@ -11,6 +16,7 @@ android {
         versionName "1.0"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
+
     buildTypes {
         release {
             signingConfig signingConfigs.debug
@@ -19,6 +25,7 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
+
     compileOptions {
         sourceCompatibility = 1.8
         targetCompatibility = 1.8

sdk-example-kt/src/main/java/jp/studyplus/android/sdk_example_kt/MainActivity.kt

@@ -1,23 +1,24 @@
 package jp.studyplus.android.sdk_example_kt
 
-import android.app.Activity
 import android.content.ActivityNotFoundException
 import android.content.Intent
 import android.os.Bundle
-import android.view.View
-import android.widget.TextView
 import android.widget.Toast
 import androidx.appcompat.app.AppCompatActivity
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.LifecycleEventObserver
+import androidx.lifecycle.LifecycleOwner
 import jp.studyplus.android.sdk.PostCallback
 import jp.studyplus.android.sdk.Studyplus
 import jp.studyplus.android.sdk.StudyplusError
 import jp.studyplus.android.sdk.record.StudyRecord
 import jp.studyplus.android.sdk.record.StudyRecordAmountTotal
+import jp.studyplus.android.sdk_example_kt.databinding.ActivityMainBinding
 
-class MainActivity : AppCompatActivity() {
+class MainActivity : AppCompatActivity(R.layout.activity_main) {
 
     companion object {
-        const val REQUEST_CODE_AUTH = 1
+        const val REQUEST_CODE_AUTH = 112
     }
 
     private val instance by lazy {
@@ -30,56 +31,55 @@ class MainActivity : AppCompatActivity() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_main)
+        val binding = ActivityMainBinding.inflate(layoutInflater)
+        setContentView(binding.root)
 
-        findViewById<View>(R.id.start_auth)?.apply {
-            setOnClickListener {
-                try {
-                    instance.startAuth(this@MainActivity, REQUEST_CODE_AUTH)
-                } catch (e: ActivityNotFoundException) {
-                    e.printStackTrace()
-                    Toast.makeText(context, "Need for Studyplus 5.+", Toast.LENGTH_LONG).show()
+        lifecycle.addObserver(object : LifecycleEventObserver {
+            override fun onStateChanged(source: LifecycleOwner, event: Lifecycle.Event) {
+                when (event) {
+                    Lifecycle.Event.ON_RESUME -> {
+                        binding.authStatus.text = currentAuthState()
+                    }
+                    else -> {
+                        // nop
+                    }
                 }
             }
-        }
+        })
 
-        findViewById<View>(R.id.cancel_auth)?.apply {
-            setOnClickListener {
-                instance.cancelAuth()
-                updateAuthText()
+        binding.startAuth.setOnClickListener {
+            try {
+                instance.startAuth(this@MainActivity, REQUEST_CODE_AUTH)
+            } catch (e: ActivityNotFoundException) {
+                e.printStackTrace()
+                Toast
+                    .makeText(this@MainActivity, "Need for Studyplus 5.+", Toast.LENGTH_LONG)
+                    .show()
             }
         }
-
-        findViewById<View>(R.id.post_study_record)?.apply {
-            setOnClickListener {
-                val record = StudyRecord(
-                    duration = 2 * 60,
-                    amount = StudyRecordAmountTotal(30),
-                    comment = "勉強した！！！"
-                )
-                instance.postRecord(record, object : PostCallback {
-                    override fun onSuccess() {
-                        Toast.makeText(context, "Post Study Record!!", Toast.LENGTH_LONG).show()
-                    }
-
-                    override fun onFailure(e: StudyplusError) {
-                        Toast.makeText(context, "error!!", Toast.LENGTH_LONG).show()
-                    }
-                })
-            }
+        binding.cancelAuth.setOnClickListener {
+            instance.cancelAuth()
+            binding.authStatus.text = currentAuthState()
         }
-    }
-
-    override fun onResume() {
-        super.onResume()
-        updateAuthText()
-    }
+        binding.postStudyRecord.setOnClickListener {
+            val record = StudyRecord(
+                duration = 2 * 60,
+                amount = StudyRecordAmountTotal(30),
+                comment = "勉強した！！！",
+            )
+            instance.postRecord(record, object : PostCallback {
+                override fun onSuccess() {
+                    Toast
+                        .makeText(this@MainActivity, "Post Study Record!!", Toast.LENGTH_LONG)
+                        .show()
+                }
 
-    private fun updateAuthText() {
-        val authStatusText = findViewById<TextView>(R.id.auth_status)
-        authStatusText.text = when (instance.isAuthenticated()) {
-            true -> getString(R.string.status_authenticated)
-            else -> getString(R.string.status_unauthenticated)
+                override fun onFailure(e: StudyplusError) {
+                    Toast
+                        .makeText(this@MainActivity, "error!!", Toast.LENGTH_LONG)
+                        .show()
+                }
+            })
         }
     }
 
@@ -90,13 +90,14 @@ class MainActivity : AppCompatActivity() {
             return
         }
 
-        when (requestCode) {
-            REQUEST_CODE_AUTH -> {
-                if (resultCode == Activity.RESULT_OK) {
-                    instance.setAuthResult(data)
-                    Toast.makeText(this, "Success!!", Toast.LENGTH_LONG).show()
-                }
-            }
+        if (requestCode == REQUEST_CODE_AUTH) {
+            instance.setAuthResult(data)
+            Toast.makeText(this, "Success!!", Toast.LENGTH_LONG).show()
         }
     }
+
+    private fun currentAuthState() = when (instance.isAuthenticated()) {
+        true -> getString(R.string.status_authenticated)
+        else -> getString(R.string.status_unauthenticated)
+    }
 }