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'
+    id 'dagger.hilt.android.plugin'
+    id 'kotlin-kapt'
+}
+
+android {
+    compileSdk 31
+
+    defaultConfig {
+        applicationId "com.dev.web3js_android"
+        minSdk 21
+        targetSdk 31
+        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 'androidx.core:core-ktx:1.7.0'
+    implementation 'androidx.appcompat:appcompat:1.4.0'
+    implementation 'com.google.android.material:material:1.4.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.1.2'
+    implementation 'androidx.activity:activity-ktx:1.4.0'
+    //Viewodel and Livedata
+    implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:2.4.0"
+    implementation "androidx.lifecycle:lifecycle-livedata-ktx:2.4.0"
+    implementation "androidx.lifecycle:lifecycle-extensions:2.2.0"
+
+
+    // Hilt
+    implementation "com.google.dagger:hilt-android:2.38.1"
+    kapt "com.google.dagger:hilt-compiler:2.38.1"
+
+    testImplementation 'junit:junit:'
+    implementation 'org.web3j:core:4.1.0-android'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
+}

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/dev/web3js_android/ExampleInstrumentedTest.kt

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+package com.dev.web3js_android
+
+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.dev.web3js_android", 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.dev.web3js_android">
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.Web3JsAndroid">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true">
+            <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/dev/web3js_android/MainActivity.kt

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+package com.dev.web3js_android
+
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import android.os.StrictMode
+import android.view.View
+import android.widget.Button
+import android.widget.EditText
+import android.widget.TextView
+import android.widget.Toast
+import androidx.activity.viewModels
+import androidx.lifecycle.LifecycleOwner
+import androidx.lifecycle.Observer
+import org.bouncycastle.jce.provider.BouncyCastleProvider
+import org.web3j.crypto.Credentials
+import org.web3j.crypto.WalletUtils
+import org.web3j.protocol.Web3j
+import org.web3j.protocol.core.DefaultBlockParameterName
+import org.web3j.protocol.core.methods.response.EthGetBalance
+import org.web3j.protocol.core.methods.response.TransactionReceipt
+import org.web3j.protocol.core.methods.response.Web3ClientVersion
+import org.web3j.protocol.http.HttpService
+import org.web3j.tx.Transfer
+import org.web3j.utils.Convert
+import java.io.File
+import java.lang.Exception
+import java.math.BigDecimal
+import java.security.Security
+
+class MainActivity : AppCompatActivity() {
+    var web3: Web3j? = null
+    var file: File? = null
+    var Walletname: String? = null
+    var credentials: Credentials? = null
+    var txtaddress: TextView? = null
+    val main: Mainviewmodel by viewModels()
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+        txtaddress = findViewById(R.id.text_address)
+
+        //enter your own infura api key below
+        //  web3 = Web3j.build(HttpService("https://rinkeby.infura.io/v3/e344d511c77a4f78af0880dc3e90ca7b"))
+
+        // setupBouncyCastle()
+
+        //  this is the pathname for the file that will be created and stores the wallet details
+        val Edtpath = findViewById<EditText>(R.id.walletpath)
+        val etheriumwalletPath = Edtpath.text.toString()
+        val Edtpassword = findViewById<EditText>(R.id.password)
+        val txtbalance = findViewById<TextView>(R.id.text_balance)
+        val btncnt = findViewById<Button>(R.id.buttonsconnect)
+        val btnblnc = findViewById<Button>(R.id.buttonbalance)
+        val creatbtnb = findViewById<Button>(R.id.create_button)
+        val sendethbtn = findViewById<Button>(R.id.sendEth)
+        val Edtvalue = findViewById<EditText>(R.id.ethvalue)
+
+        file = File(filesDir.toString() + etheriumwalletPath) // the etherium wallet location
+
+        //create the directory if it does not exist
+        if (!file!!.mkdirs()) {
+            file!!.mkdirs()
+        } else {
+            Toast.makeText(
+                applicationContext, "Directory already created",
+                Toast.LENGTH_LONG
+            ).show()
+        }
+
+        main.setupBouncyCastle()
+        main.getbalance.observe(this, Observer {
+            txtbalance.text = it
+        })
+        btncnt.setOnClickListener {
+            // connect to the etheruem network
+            main.connectToEthNetwork(this)
+        }
+        btnblnc.setOnClickListener {
+            main.retrieveBalance(this)
+        }
+        creatbtnb.setOnClickListener {
+            // Create wallet
+            main.createWallet(Edtpassword.text.toString(), txtaddress, file, this)
+        }
+        sendethbtn.setOnClickListener {
+            main.makeTransaction(Edtvalue.text.toString().toInt(), this)
+        }
+
+    }
+
+}