first commit

.gitignore

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

README.md

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+An Android(6.0+) WebView app that can detect the phone number of **incoming**/**outgoing**/**missed** calls in native Java functions through the `BroadcastReceiver` and then pass that number to WebView via the `JavascriptInterface` for the web's further handling.
+
+Credit: [@ftvs](https://github.com/ftvs)'s [gist](https://gist.github.com/ftvs/e61ccb039f511eb288ee) ♥️

app/.gitignore

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+/build

app/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 28
+    defaultConfig {
+        applicationId "app.sten.wit"
+        minSdkVersion 23
+        targetSdkVersion 28
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'com.android.support:appcompat-v7:28.0.0'
+    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'com.android.support.test:runner:1.0.2'
+    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
+}

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/app/sten/wit/ExampleInstrumentedTest.java

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+package app.sten.wit;
+
+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.*;
+
+/**
+ * Instrumented 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() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getTargetContext();
+
+        assertEquals("app.sten.wit", 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"
+    xmlns:tools="http://schemas.android.com/tools"
+    package="app.sten.wit">
+
+    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
+    <uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS"/>
+
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
+
+    <application
+        android:allowBackup="true"
+        android:fullBackupContent="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme"
+        android:usesCleartextTraffic="true"
+        tools:ignore="GoogleAppIndexingWarning">
+        <activity
+            android:name=".MainActivity"
+            android:configChanges="orientation|keyboardHidden|screenSize">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+        <!-- statically register CallReceiver
+        <receiver android:name=".CallReceiver" android:enabled="true">
+            <intent-filter>
+                <action android:name="android.intent.action.PHONE_STATE" />
+            </intent-filter>
+            <intent-filter>
+                <action android:name="android.intent.action.NEW_OUTGOING_CALL" />
+            </intent-filter>
+        </receiver>-->
+    </application>
+
+</manifest>

app/src/main/java/app/sten/wit/MainActivity.java

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+package app.sten.wit;
+
+import java.util.Date;
+
+import android.Manifest;
+import android.content.Context;
+import android.content.IntentFilter;
+import android.content.pm.PackageManager;
+import android.support.v4.app.ActivityCompat;
+import android.support.v4.content.ContextCompat;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.annotation.SuppressLint;
+import android.webkit.JavascriptInterface;
+import android.webkit.WebView;
+import android.webkit.WebViewClient;
+import android.webkit.WebResourceRequest;
+import android.net.Uri;
+import android.content.Intent;
+import android.graphics.Bitmap;
+import android.view.KeyEvent;
+import android.util.Log;
+import android.widget.Toast;
+
+public class MainActivity extends AppCompatActivity {
+
+    public static final int MY_PERMISSIONS_REQUEST_READ_PHONE_STATE = 0;
+    public static final String URL = "http://112.74.170.24/";
+
+    CallReceiver callReceiver;
+    WebView webView;
+
+    @SuppressLint("SetJavaScriptEnabled")
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        // Here, thisActivity is the current activity
+        if (ContextCompat.checkSelfPermission(MainActivity.this,
+                Manifest.permission.READ_PHONE_STATE)
+                != PackageManager.PERMISSION_GRANTED) {
+            // We do not have this permission. Let's ask the user
+            ActivityCompat.requestPermissions(MainActivity.this,
+                    new String[]{Manifest.permission.READ_PHONE_STATE},
+                    MY_PERMISSIONS_REQUEST_READ_PHONE_STATE);
+        }
+
+        if (callReceiver == null) {
+            callReceiver = new CallReceiver();
+        }
+        IntentFilter intentFilter = new IntentFilter();
+        intentFilter.addAction("android.intent.action.PHONE_STATE");
+        intentFilter.addAction("android.intent.action.NEW_OUTGOING_CALL");
+        // dynamically register CallReceiver
+        registerReceiver(callReceiver, intentFilter);
+
+        webView = (WebView) findViewById(R.id.webview);
+
+        webView.addJavascriptInterface(new JsObject(), "sten");
+        webView.getSettings().setDefaultTextEncodingName("utf-8");
+        webView.getSettings().setJavaScriptEnabled(true);
+        webView.getSettings().setDomStorageEnabled(true);
+        webView.getSettings().setSupportZoom(true);
+        webView.getSettings().setBuiltInZoomControls(true);
+        webView.getSettings().setDisplayZoomControls(false);
+
+        webView.loadUrl(URL);
+
+        webView.setWebViewClient(new WebViewClient() {
+
+            @Override
+            public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
+                Uri uri = request.getUrl();
+                if (uri == null) return false;
+                String url = uri.toString();
+
+                try {
+                    if (!url.startsWith("http://") && !url.startsWith("https://")) {
+                        Intent intent = new Intent(Intent.ACTION_VIEW, uri);
+                        startActivity(intent);
+
+                        return true;
+                    }
+                } catch (Exception e){
+                    return true;
+                }
+
+                return super.shouldOverrideUrlLoading(view, request);
+            }
+
+            @Override
+            public void onPageStarted(WebView view, String url, Bitmap favicon) {
+                super.onPageStarted(view, url, favicon);
+            }
+
+            @Override
+            public void onPageFinished(WebView view, String url) {
+                super.onPageFinished(view, url);
+            }
+        });
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        // manually unregister dynamically registered CallReceiver
+        if (callReceiver != null) {
+            unregisterReceiver(callReceiver);
+            callReceiver = null;
+        }
+    }
+
+    @Override
+    public void onRequestPermissionsResult(int requestCode,
+            String permissions[], int[] grantResults) {
+        switch (requestCode) {
+            case MY_PERMISSIONS_REQUEST_READ_PHONE_STATE: {
+                if (grantResults.length > 0
+                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+                    // permission granted!
+                } else {
+                    // permission denied or has been cancelled
+                }
+                return;
+            }
+        }
+    }
+
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        if ((keyCode == KeyEvent.KEYCODE_BACK) && webView.canGoBack()) {
+            webView.goBack();
+
+            return true;
+        }
+
+        return super.onKeyDown(keyCode, event);
+    }
+
+    class CallReceiver extends PhonecallReceiver {
+
+        @Override
+        protected void onIncomingCallStarted(Context ctx, String number, Date start) {
+            String msg = "start incoming call: " + number + " at " + start;
+
+            Toast.makeText(ctx.getApplicationContext(), msg, Toast.LENGTH_SHORT).show();
+            Log.d("#", msg);
+
+            webView.loadUrl("javascript:writeNumber('" + number + "')");
+        }
+
+        @Override
+        protected void onOutgoingCallStarted(Context ctx, String number, Date start) {
+            String msg = "start outgoing call: " + number + " at " + start;
+
+            Toast.makeText(ctx.getApplicationContext(), msg, Toast.LENGTH_SHORT).show();
+            Log.d("#", msg);
+        }
+
+        @Override
+        protected void onIncomingCallEnded(Context ctx, String number, Date start, Date end) {
+            String msg = "end incoming call: " + number + " at " + end;
+
+            Toast.makeText(ctx.getApplicationContext(), msg, Toast.LENGTH_SHORT).show();
+            Log.d("#", msg);
+        }
+
+        @Override
+        protected void onOutgoingCallEnded(Context ctx, String number, Date start, Date end) {
+            String msg = "end outgoing call: " + number + " at " + end;
+
+            Toast.makeText(ctx.getApplicationContext(), msg, Toast.LENGTH_SHORT).show();
+            Log.d("#", msg);
+        }
+
+        @Override
+        protected void onMissedCall(Context ctx, String number, Date start) {
+            String msg = "missed call: " + number + " at " + start;
+
+            Toast.makeText(ctx.getApplicationContext(), msg, Toast.LENGTH_SHORT).show();
+            Log.d("#", msg);
+        }
+    }
+
+    class JsObject {
+
+        @JavascriptInterface
+        public void debug(String msg) {
+            Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_LONG).show();
+        }
+    }
+}