first commit

.gitignore

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+*.iml
+*.jks
+.gradle
+/local.properties
+/.idea
+.DS_Store
+/build
+/captures
+/app/release
+.externalNativeBuild
+.cxx
+local.properties

app/.gitignore

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+/build

app/build.gradle

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+plugins {
+    id 'com.android.application'
+}
+
+android {
+    defaultConfig {
+        applicationId "net.webdrop"
+        minSdkVersion 21
+        compileSdk 34
+        targetSdkVersion 34
+        versionCode 12
+        versionName "v1.2"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled true
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+        debug {
+            minifyEnabled false
+            applicationIdSuffix ".debug"
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
+    }
+    namespace 'net.webdrop'
+}
+
+dependencies {
+}

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
+
+-keep class * extends android.webkit.WebChromeClient { *; }
+-dontwarn im.delight.android.webview.**

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">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission
+        android:name="android.permission.WRITE_EXTERNAL_STORAGE"
+        android:maxSdkVersion="32" />
+
+    <application
+        android:allowBackup="true"
+        android:icon="@drawable/ic_webdrop"
+        android:label="@string/app_name"
+        android:roundIcon="@drawable/ic_webdrop"
+        android:supportsRtl="true"
+        android:theme="@android:style/Theme.Material.Light.NoActionBar">
+        <activity
+            android:name=".MainActivity"
+            android:configChanges="orientation|screenSize"
+            android:exported="true"
+            android:launchMode="singleTask"
+            android:windowSoftInputMode="stateAlwaysHidden">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+            <intent-filter>
+                <action android:name="android.intent.action.SEND" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+
+                <data android:mimeType="*/*" />
+            </intent-filter>
+            <intent-filter>
+                <action android:name="android.intent.action.SEND_MULTIPLE" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+
+                <data android:mimeType="*/*" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/net/webdrop/JavaScriptInterface.java

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+package net.webdrop;
+
+import android.content.ContentResolver;
+import android.content.ContentValues;
+import android.content.Context;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Environment;
+import android.provider.MediaStore;
+import android.util.Base64;
+import android.webkit.JavascriptInterface;
+import android.widget.Toast;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.text.DateFormat;
+import java.util.Date;
+
+public class JavaScriptInterface {
+    private final Context context;
+
+    public JavaScriptInterface(Context context) {
+        this.context = context;
+    }
+
+    @JavascriptInterface
+    public void getBase64FromBlobData(String base64Data, String mimeType, String extension) throws IOException {
+        convertBase64StringToFileAndSaveIt(base64Data, mimeType, extension);
+    }
+
+    public static String getBase64StringFromBlobUrl(String blobUrl, String mimeType, String extension) {
+        if (blobUrl.startsWith("blob")) {
+            return "javascript: var xhr = new XMLHttpRequest();" +
+                    "xhr.open('GET', '" + blobUrl + "', true);" +
+                    "xhr.setRequestHeader('Content-type','" + mimeType + "');" +
+                    "xhr.responseType = 'blob';" +
+                    "xhr.onload = function(e) {" +
+                    "    if (this.status == 200) {" +
+                    "        var blobPdf = this.response;" +
+                    "        var reader = new FileReader();" +
+                    "        reader.readAsDataURL(blobPdf);" +
+                    "        reader.onloadend = function() {" +
+                    "            base64data = reader.result;" +
+                    "            Android.getBase64FromBlobData(base64data,'" + mimeType + "','" + extension + "');" +
+                    "        }" +
+                    "    }" +
+                    "};" +
+                    "xhr.send();";
+        }
+        return "javascript: console.log('It is not a Blob URL');";
+    }
+
+    private void convertBase64StringToFileAndSaveIt(String base64Data, String mimeType, String extension) throws IOException {
+        String currentDateTime = DateFormat.getDateTimeInstance().format(new Date());
+        String fileName = "File_" + currentDateTime;
+        if (!extension.isEmpty()) fileName = fileName + "_." + extension;
+        byte[] fileAsBytes = Base64.decode(base64Data.replaceFirst("^data:" + mimeType + ";base64,", ""), 0);
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+            ContentResolver resolver = context.getContentResolver();
+            ContentValues contentValues = new ContentValues();
+            contentValues.put(MediaStore.Downloads.DISPLAY_NAME, fileName);
+            contentValues.put(MediaStore.Downloads.MIME_TYPE, mimeType);
+            contentValues.put(MediaStore.Downloads.DATE_ADDED, System.currentTimeMillis());
+            contentValues.put(MediaStore.Downloads.RELATIVE_PATH, Environment.DIRECTORY_DOWNLOADS);
+
+            Uri uri = resolver.insert(MediaStore.Downloads.EXTERNAL_CONTENT_URI, contentValues);
+            OutputStream outputStream = resolver.openOutputStream(uri);
+            outputStream.write(fileAsBytes);
+            outputStream.close();
+
+        } else {
+            final File file = new File(Environment.getExternalStoragePublicDirectory(
+                    Environment.DIRECTORY_DOWNLOADS) + "/" + fileName);
+            FileOutputStream fileOutputStream = new FileOutputStream(file, false);
+            fileOutputStream.write(fileAsBytes);
+            fileOutputStream.flush();
+        }
+        Toast.makeText(context, "Check downloads folder ✅", Toast.LENGTH_SHORT).show();
+    }
+}