Add native bridge functionality to handle "copy to clipboard" (#70)

Author: fdocr

app/src/main/java/to/dev/dev_android/util/AndroidWebViewBridge.kt

@@ -1,13 +1,17 @@
 package to.dev.dev_android.util
 
+import android.content.ClipData
+import android.content.ClipboardManager
+import android.content.Context
 import android.util.Log
 import android.webkit.JavascriptInterface
 
 /**
  * This class currently is empty because more methods would be added to it
  * when new bridge functionalities are added.
  */
-class AndroidWebViewBridge {
+class AndroidWebViewBridge(private val mContext: Context) {
+
     /**
      * Every method that has to be accessed from web-view needs to be marked with
      * `@JavascriptInterface`.
@@ -17,4 +21,11 @@ class AndroidWebViewBridge {
     fun logError(errorTag: String, errorMessage: String) {
         Log.e(errorTag, errorMessage)
     }
+
+    @JavascriptInterface
+    fun copyToClipboard(text: String) {
+        val clipboard = mContext.getSystemService(Context.CLIPBOARD_SERVICE) as? ClipboardManager
+        val clip = ClipData.newPlainText("clipboard", text)
+        clipboard?.primaryClip = clip
+    }
 }

app/src/main/java/to/dev/dev_android/view/main/view/MainActivity.kt

@@ -4,17 +4,19 @@ import android.annotation.SuppressLint
 import android.app.Activity
 import android.content.Intent
 import android.net.Uri
+import android.os.Build
 import android.os.Bundle
 import android.view.View
 import android.webkit.ValueCallback
+import android.webkit.WebView
 import to.dev.dev_android.R
 import to.dev.dev_android.base.BuildConfig
 import to.dev.dev_android.base.activity.BaseActivity
 import to.dev.dev_android.databinding.ActivityMainBinding
 import to.dev.dev_android.util.AndroidWebViewBridge
 
 class MainActivity : BaseActivity<ActivityMainBinding>(), CustomWebChromeClient.CustomListener {
-    private val webViewBridge: AndroidWebViewBridge = AndroidWebViewBridge()
+    private val webViewBridge: AndroidWebViewBridge = AndroidWebViewBridge(this)
 
     private var filePathCallback: ValueCallback<Array<Uri>>? = null
 
@@ -48,9 +50,15 @@ class MainActivity : BaseActivity<ActivityMainBinding>(), CustomWebChromeClient.
 
     @SuppressLint("SetJavaScriptEnabled")
     private fun setWebViewSettings() {
+        if (BuildConfig.DEBUG && Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
+            WebView.setWebContentsDebuggingEnabled(true)
+        }
+
         binding.webView.settings.javaScriptEnabled = true
         binding.webView.settings.domStorageEnabled = true
-        binding.webView.addJavascriptInterface(webViewBridge, "androidWebViewBridge")
+        binding.webView.settings.userAgentString = BuildConfig.userAgent
+
+        binding.webView.addJavascriptInterface(webViewBridge, "AndroidBridge")
         binding.webView.webViewClient = CustomWebViewClient(this@MainActivity) {
             binding.splash.visibility = View.GONE
         }

buildSrc/src/main/kotlin/Android.kt

@@ -40,6 +40,8 @@ fun Project.configureBuildConfig(android: BaseExtension) {
     android.buildTypes.all {
         resValue("string", "baseUrl", extra.string("chrome.baseUrl"))
         buildConfigString("baseUrl", extra.string("chrome.baseUrl"))
+        resValue("string", "userAgent", extra.string("chrome.userAgent"))
+        buildConfigString("userAgent", extra.string("chrome.userAgent"))
     }
 }
 

gradle.properties

@@ -1,5 +1,8 @@
 ## dev.to configurations
 chrome.baseUrl=https://dev.to/
+chrome.userAgent=DEV-Native-android
+
+# Android release configurations
 android.targetSdkVersion=28
 android.compileSdkVersion=28
 android.minSdkVersion=18