correct error message

As requested in #411

.circleci/config.yml

@@ -0,0 +1,27 @@
+version: 2
+jobs:
+  build:
+    working_directory: ~/code
+    docker:
+      - image: bitriseio/android-ndk
+    environment:
+      JVM_OPTS: -Xmx3200m
+    steps:
+      - checkout
+      - restore_cache:
+          key: jars-{{ checksum "build.gradle" }}-{{ checksum  "app/build.gradle" }}
+      - run:
+          name: Download Dependencies
+          command: ./gradlew androidDependencies
+      - save_cache:
+          paths:
+            - ~/.gradle
+          key: jars-{{ checksum "build.gradle" }}-{{ checksum  "app/build.gradle" }}
+      - run:
+          name: Run Tests
+          command: ./gradlew test
+      - store_artifacts:
+          path: app/build/reports
+          destination: reports
+      - store_test_results:
+          path: app/build/test-results

.gitignore

@@ -1,9 +1,9 @@
 .gradle
 /build
 *.iml
-/.idea/libraries
-/.idea/workspace.xml
+/.idea
 /local.properties
 /captures
 .externalNativeBuild
 .DS_Store
+/app/release

.idea/.gitignore

@@ -1,2 +1,3 @@
 workspace.xml
 markdown-*
+misc.xml

.idea/gradle.xml

@@ -3,6 +3,7 @@
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
+        <option name="disableWrapperSourceDistributionNotification" value="true" />
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
         <option name="modules">

.idea/libraries/constraint_layout_1_0_2.xml

@@ -1,10 +0,0 @@
-<component name="libraryTable">
-  <library name="constraint-layout-1.0.2">
-    <CLASSES>
-      <root url="file://$USER_HOME$/.android/build-cache/983cd9976ef510b2538361561f2ee91f1200f245/output/res" />
-      <root url="jar://$USER_HOME$/.android/build-cache/983cd9976ef510b2538361561f2ee91f1200f245/output/jars/classes.jar!/" />
-    </CLASSES>
-    <JAVADOC />
-    <SOURCES />
-  </library>
-</component>

.idea/libraries/constraint_layout_solver_1_0_2.xml

@@ -1,9 +0,0 @@
-<component name="libraryTable">
-  <library name="constraint-layout-solver-1.0.2">
-    <CLASSES>
-      <root url="jar://$USER_HOME$/AppData/Local/Android/Sdk/extras/m2repository/com/android/support/constraint/constraint-layout-solver/1.0.2/constraint-layout-solver-1.0.2.jar!/" />
-    </CLASSES>
-    <JAVADOC />
-    <SOURCES />
-  </library>
-</component>

.idea/libraries/core_1_9_8.xml

@@ -1,10 +0,0 @@
-<component name="libraryTable">
-  <library name="core-1.9.8">
-    <CLASSES>
-      <root url="jar://$USER_HOME$/.android/build-cache/db7eb580bfa6467818ef12c5f1fa42273b50aa3a/output/jars/classes.jar!/" />
-      <root url="file://$USER_HOME$/.android/build-cache/db7eb580bfa6467818ef12c5f1fa42273b50aa3a/output/res" />
-    </CLASSES>
-    <JAVADOC />
-    <SOURCES />
-  </library>
-</component>

.idea/libraries/core_3_3_0.xml

@@ -1,11 +0,0 @@
-<component name="libraryTable">
-  <library name="core-3.3.0">
-    <CLASSES>
-      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/com.google.zxing/core/3.3.0/73c49077166faa4c3c0059c5f583d1d7bd1475fe/core-3.3.0.jar!/" />
-    </CLASSES>
-    <JAVADOC />
-    <SOURCES>
-      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/com.google.zxing/core/3.3.0/39d966e052e28fc7d83793b02e0af97ccf955745/core-3.3.0-sources.jar!/" />
-    </SOURCES>
-  </library>
-</component>

.idea/libraries/zxing_1_9_8.xml

@@ -1,10 +0,0 @@
-<component name="libraryTable">
-  <library name="zxing-1.9.8">
-    <CLASSES>
-      <root url="jar://$USER_HOME$/.android/build-cache/8d8f2e0e10c7af73321454f6fa481e8e5438e654/output/jars/classes.jar!/" />
-      <root url="file://$USER_HOME$/.android/build-cache/8d8f2e0e10c7af73321454f6fa481e8e5438e654/output/res" />
-    </CLASSES>
-    <JAVADOC />
-    <SOURCES />
-  </library>
-</component>

.idea/misc.xml

@@ -1,46 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="EntryPointsManager">
-    <entry_points version="2.0" />
-  </component>
-  <component name="NullableNotNullManager">
-    <option name="myDefaultNullable" value="android.support.annotation.Nullable" />
-    <option name="myDefaultNotNull" value="android.support.annotation.NonNull" />
-    <option name="myNullables">
-      <value>
-        <list size="4">
-          <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.Nullable" />
-          <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nullable" />
-          <item index="2" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.Nullable" />
-          <item index="3" class="java.lang.String" itemvalue="android.support.annotation.Nullable" />
-        </list>
-      </value>
-    </option>
-    <option name="myNotNulls">
-      <value>
-        <list size="4">
-          <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.NotNull" />
-          <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nonnull" />
-          <item index="2" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.NonNull" />
-          <item index="3" class="java.lang.String" itemvalue="android.support.annotation.NonNull" />
-        </list>
-      </value>
-    </option>
-  </component>
-  <component name="ProjectLevelVcsManager" settingsEditedManually="false">
-    <OptionsSetting value="true" id="Add" />
-    <OptionsSetting value="true" id="Remove" />
-    <OptionsSetting value="true" id="Checkout" />
-    <OptionsSetting value="true" id="Update" />
-    <OptionsSetting value="true" id="Status" />
-    <OptionsSetting value="true" id="Edit" />
-    <ConfirmationsSetting value="0" id="Add" />
-    <ConfirmationsSetting value="0" id="Remove" />
-  </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" default="true" assert-keyword="true" jdk-15="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
-    <output url="file://$PROJECT_DIR$/build/classes" />
-  </component>
-  <component name="ProjectType">
-    <option name="id" value="Android" />
-  </component>
-</project>

README.md

@@ -1,44 +1,46 @@
 # Monerujo
-Another Android Monero Wallet
+Another Android Monero Wallet for Monero
+	**(not
+    Monero Classic,
+    Monero-Classic,
+    Monero Zero,
+    Monero Original,
+    Monero C,
+    Monero V)**
 
 ### QUICKSTART
 - Download the APK for the most current release [here](https://github.com/m2049r/xmrwallet/releases) and install it
+- Alternatively add our F-Droid repo https://f-droid.monerujo.io/fdroid/repo with fingerpint ```A8 2C 68 E1 4A F0 AA 6A 2E C2 0E 6B 27 2E FF 25 E5 A0 38 F3 F6 58 84 31 6E 0F 5E 0D 91 E7 B7 13``` to your F-Droid client
 - Run the App and select "Generate Wallet" to create a new wallet or recover a wallet
 - Advanced users can copy over synced wallet files (all files) onto sdcard in directory Monerujo (created first time App is started)
 - See the [FAQ](doc/FAQ.md)
 
+## Translations
+Help us translate Monerujo! You can find instructions [On Taiga](https://taiga.getmonero.org/project/erciccione-monero-localization/wiki/monerujo), and if you need help/support, open an issue or contact the Localization Workgroup. You can find us on the freenode channel `#monero-translations`, also relayed on [MatterMost](https://mattermost.getmonero.org/monero/channels/monero-translations), and matrix/riot.
+
 ### Disclaimer
 You may lose all your Moneroj if you use this App. Be cautious when spending on the mainnet.
 
 ### Random Notes
-- Based off monero v0.11.0.0 with PR #2289 applied
-- currently only android32 (runs on 64-bit as well)
-- works on the testnet & mainnet
-- takes forever to sync due to 32-bit architecture
+- works on the mainnet & stagenet
 - use your own daemon - it's easy
-- screen stays on until first sync is complete
-- saves wallet only on first sync and when sending transactions or editing notes
 - Monerujo means "Monero Wallet" according to https://www.reddit.com/r/Monero/comments/3exy7t/esperanto_corner/
 
 ### TODO
-- review visibility of methods/classes
-- more sensible error dialogs
+- see taiga.getmonero.org & issues on github
 
 ### Issues / Pitfalls
+- Users of Zenfone MAX & Zenfone 2 Laser (possibly others) **MUST** use the armeabi-v7a APK as the arm64-v8a build uses hardware AES
+functionality these models don't have.
+- You should backup your wallet files in the "monerujo" folder periodically.
+- Also note, that on some devices the backups will only be visible on a PC over USB after a reboot of the device (it's an Android bug/feature)
 - Created wallets on a private testnet are unusable because the restore height is set to that
 of the "real" testnet.  After creating a new wallet, make a **new** one by recovering from the seed.
 The official monero client shows the same behaviour.
-- In rare occasions the monero core code returns a wallet address with corrupted characters -
-in these cases Monerujo crashes on purpose to make sure nothing bad happens
 
 ### HOW TO BUILD
-No need to build. Binaries are included:
 
-- openssl-1.0.2l
-- monero-v0.11.0.0 + pull requests #2289
-- boost_1_64_0
-
-If you want to build them yourself (recommended) check out [the instructions](doc/BUILDING-external-libs.md)
+See [the instructions](doc/BUILDING-external-libs.md)
 
 Then, fire up Android Studio and build the APK.
 

app/CMakeLists.txt

@@ -7,13 +7,21 @@ add_library( monerujo
 
 set(EXTERNAL_LIBS_DIR ${CMAKE_SOURCE_DIR}/../external-libs)
 
+############
+# libsodium
+############
+
+add_library(sodium STATIC IMPORTED)
+set_target_properties(sodium PROPERTIES IMPORTED_LOCATION
+        ${EXTERNAL_LIBS_DIR}/libsodium/lib/${ANDROID_ABI}/libsodium.a)
+
 ############
 # OpenSSL
 ############
 
 add_library(crypto STATIC IMPORTED)
 set_target_properties(crypto PROPERTIES IMPORTED_LOCATION
-    ${EXTERNAL_LIBS_DIR}/openssl/lib/${ANDROID_ABI}/libcrypto.a)
+        ${EXTERNAL_LIBS_DIR}/openssl/lib/${ANDROID_ABI}/libcrypto.a)
 
 add_library(ssl STATIC IMPORTED)
 set_target_properties(ssl PROPERTIES IMPORTED_LOCATION
@@ -60,9 +68,13 @@ set_target_properties(boost_wserialization PROPERTIES IMPORTED_LOCATION
     ${EXTERNAL_LIBS_DIR}/boost/lib/${ANDROID_ABI}/libboost_wserialization.a)
 
 #############
-# Monero set(libs_to_merge wallet cryptonote_core cryptonote_basic mnemonics common cncrypto ringct)
+# Monero
 #############
 
+add_library(wallet_api STATIC IMPORTED)
+set_target_properties(wallet_api PROPERTIES IMPORTED_LOCATION
+    ${EXTERNAL_LIBS_DIR}/monero/lib/${ANDROID_ABI}/libwallet_api.a)
+
 add_library(wallet STATIC IMPORTED)
 set_target_properties(wallet PROPERTIES IMPORTED_LOCATION
     ${EXTERNAL_LIBS_DIR}/monero/lib/${ANDROID_ABI}/libwallet.a)
@@ -91,11 +103,9 @@ add_library(ringct STATIC IMPORTED)
 set_target_properties(ringct PROPERTIES IMPORTED_LOCATION
     ${EXTERNAL_LIBS_DIR}/monero/lib/${ANDROID_ABI}/libringct.a)
 
-#####
-
-add_library(p2p STATIC IMPORTED)
-set_target_properties(p2p PROPERTIES IMPORTED_LOCATION
-    ${EXTERNAL_LIBS_DIR}/monero/lib/${ANDROID_ABI}/libp2p.a)
+add_library(ringct_basic STATIC IMPORTED)
+set_target_properties(ringct_basic PROPERTIES IMPORTED_LOCATION
+    ${EXTERNAL_LIBS_DIR}/monero/lib/${ANDROID_ABI}/libringct_basic.a)
 
 add_library(blockchain_db STATIC IMPORTED)
 set_target_properties(blockchain_db PROPERTIES IMPORTED_LOCATION
@@ -113,7 +123,6 @@ add_library(unbound STATIC IMPORTED)
 set_target_properties(unbound PROPERTIES IMPORTED_LOCATION
     ${EXTERNAL_LIBS_DIR}/monero/lib/${ANDROID_ABI}/libunbound.a)
 
-####
 add_library(epee STATIC IMPORTED)
 set_target_properties(epee PROPERTIES IMPORTED_LOCATION
     ${EXTERNAL_LIBS_DIR}/monero/lib/${ANDROID_ABI}/libepee.a)
@@ -122,9 +131,21 @@ add_library(blocks STATIC IMPORTED)
 set_target_properties(blocks PROPERTIES IMPORTED_LOCATION
     ${EXTERNAL_LIBS_DIR}/monero/lib/${ANDROID_ABI}/libblocks.a)
 
-add_library(miniupnpc STATIC IMPORTED)
-set_target_properties(miniupnpc PROPERTIES IMPORTED_LOCATION
-    ${EXTERNAL_LIBS_DIR}/monero/lib/${ANDROID_ABI}/libminiupnpc.a)
+add_library(checkpoints STATIC IMPORTED)
+set_target_properties(checkpoints PROPERTIES IMPORTED_LOCATION
+    ${EXTERNAL_LIBS_DIR}/monero/lib/${ANDROID_ABI}/libcheckpoints.a)
+
+add_library(device STATIC IMPORTED)
+set_target_properties(device PROPERTIES IMPORTED_LOCATION
+    ${EXTERNAL_LIBS_DIR}/monero/lib/${ANDROID_ABI}/libdevice.a)
+
+add_library(multisig STATIC IMPORTED)
+set_target_properties(multisig PROPERTIES IMPORTED_LOCATION
+    ${EXTERNAL_LIBS_DIR}/monero/lib/${ANDROID_ABI}/libmultisig.a)
+
+add_library(version STATIC IMPORTED)
+set_target_properties(version PROPERTIES IMPORTED_LOCATION
+    ${EXTERNAL_LIBS_DIR}/monero/lib/${ANDROID_ABI}/libversion.a)
 
 #############
 # System
@@ -137,23 +158,26 @@ include_directories( ${EXTERNAL_LIBS_DIR}/monero/include )
 message(STATUS EXTERNAL_LIBS_DIR :  ${EXTERNAL_LIBS_DIR})
 
 target_link_libraries(  monerujo
+
+                        wallet_api
                         wallet
                         cryptonote_core
                         cryptonote_basic
                         mnemonics
                         ringct
+                        ringct_basic
                         common
                         cncrypto
-
                         blockchain_db
                         lmdb
                         easylogging
                         unbound
-                        p2p
-
                         epee
                         blocks
-                        miniupnpc
+                        checkpoints
+                        device
+                        multisig
+                        version
 
                         boost_chrono
                         boost_date_time
@@ -168,5 +192,7 @@ target_link_libraries(  monerujo
                         ssl
                         crypto
 
+                        sodium
+
                        ${log-lib}
                        )

app/build.gradle

@@ -1,15 +1,14 @@
 apply plugin: 'com.android.application'
-apply plugin: 'witness'
 
 android {
-    compileSdkVersion 25
-    buildToolsVersion "25.0.2"
+    compileSdkVersion 27
+    buildToolsVersion '28.0.2'
     defaultConfig {
         applicationId "com.m2049r.xmrwallet"
         minSdkVersion 21
-        targetSdkVersion 25
-        versionCode 18
-        versionName "0.8.0.5"
+        targetSdkVersion 27
+        versionCode 131
+        versionName "1.8.1 'Bullets And Octane-Pirates'"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
         externalNativeBuild {
             cmake {
@@ -17,8 +16,15 @@ android {
                 arguments '-DANDROID_STL=c++_shared'
             }
         }
-        ndk {
-            abiFilters 'armeabi-v7a'
+    }
+
+    flavorDimensions "version"
+    productFlavors {
+        alpha {
+            applicationIdSuffix ".alpha"
+            versionNameSuffix " (alpha)"
+        }
+        prod {
         }
     }
 
@@ -27,44 +33,77 @@ android {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
+        debug {
+            applicationIdSuffix ".debug"
+        }
     }
+
     externalNativeBuild {
         cmake {
             path "CMakeLists.txt"
         }
     }
+
+    splits {
+        abi {
+            enable true
+            reset()
+            include 'armeabi-v7a', 'arm64-v8a', 'x86', 'x86_64'
+            universalApk true
+        }
+    }
+
+    // Map for the version code that gives each ABI a value.
+    def abiCodes = ['armeabi-v7a': 1, 'arm64-v8a': 2, 'x86': 3, 'x86_64': 4]
+
+    // Enumerate translated locales
+    def availableLocales = ["en"]
+    new File("app/src/main/res/").eachFileMatch(~/^values-.*/) { file ->
+        def languageTag = file.name.substring(7).replace("-r", "-")
+        availableLocales.add(languageTag)
+    }
+
+    // APKs for the same app that all have the same version information.
+    android.applicationVariants.all { variant ->
+        // Update string resource: available_locales
+        variant.resValue("string", "available_locales", availableLocales.join(","))
+        // Assigns a different version code for each output APK.
+        variant.outputs.all {
+            output ->
+                def abiName = output.getFilter(com.android.build.OutputFile.ABI)
+                output.versionCodeOverride = abiCodes.get(abiName, 0) + 10 * variant.versionCode
+                //def flavor = output.getFilter(flavor)
+
+                if (abiName == null) abiName = "universal"
+                def v = "${variant.versionName}".replaceFirst(" '.*' ?", "")
+                        .replace(".", "x")
+                        .replace("(", "-")
+                        .replace(")", "")
+                outputFileName = "$rootProject.ext.apkName-" + v + "_" + abiName + ".apk"
+        }
+    }
 }
 
 dependencies {
-    compile 'com.android.support:appcompat-v7:25.4.0'
-    compile 'com.android.support:design:25.4.0'
-    compile 'com.android.support:support-v4:25.4.0'
-    compile 'com.android.support:recyclerview-v7:25.4.0'
-    compile 'com.android.support:cardview-v7:25.4.0'
-    compile 'com.android.support.constraint:constraint-layout:1.0.2'
-    compile 'me.dm7.barcodescanner:zxing:1.9.8'
-}
+    implementation "com.android.support:appcompat-v7:$rootProject.ext.supportVersion"
+    implementation "com.android.support:design:$rootProject.ext.supportVersion"
+    implementation "com.android.support:support-v4:$rootProject.ext.supportVersion"
+    implementation "com.android.support:recyclerview-v7:$rootProject.ext.supportVersion"
+    implementation "com.android.support:cardview-v7:$rootProject.ext.supportVersion"
+    implementation 'me.dm7.barcodescanner:zxing:1.9.8'
 
-dependencyVerification {
-    verify = [
-            'com.android.support:appcompat-v7:70551e62660db15b790c5275f56b9de4dd9407d1494d07c8f3dd5698f3638677',
-            'com.android.support:design:3f409bf2019967ffc344cfaf11e52131fac982468a1707aaeb25bf3c52838966',
-            'com.android.support:support-v4:ee44c481a1f4d6978568e223e8125379b52b2ececdd53450e09ebae144bd377d',
-            'com.android.support:recyclerview-v7:a2fe121f9d01ed8980e97095b4a3fe9700a0aa0a7d4b0f8c594f765ad8455a0d',
-            'com.android.support:cardview-v7:f3fbbe1fcfdbec7333c6a2c516c5fd511a909d1975271818e268d6fe297d8c70',
-            'com.android.support.constraint:constraint-layout:b0c688cc2b7172608f8153a689d746da40f71e52d7e2fe2bfd9df2f92db77085',
-            'me.dm7.barcodescanner:zxing:d43973c9527c23fa8e6d338c6a2c458e373ce1ac6bcaa3bc41d11ae49116000d',
-            'com.android.support:support-annotations:a774272036941b4e912eb426d70c848bde7f06a3bf5fb491f75a427dc6595270',
-            'com.android.support:support-vector-drawable:077009d13882ee96f061e4bc2dbe7cce7ae1762d8297592a787ff741afbfb1f2',
-            'com.android.support:animated-vector-drawable:628ab1d56a6ee4cbedf32617af8b2a1fe02964ed0628e8f898cc09ddba6e1835',
-            'com.android.support:transition:848270144fb180efd2bf928a00ed176dbbc5290badfd638390ffba90088df8b3',
-            'com.android.support:support-compat:54019c63614ce08b02d7b9605490cd2b29ba5b2505f394a9517450b5f72b30ca',
-            'com.android.support:support-media-compat:566a161d9cb0083ef62a53e46b71ce5b3d455b8635b1a0a4ae28d96d4b583de8',
-            'com.android.support:support-core-utils:34b8437dfa95ff28d29cf57ffa3b1354a9fa9bfe4059f0fd5ce2f5e4326a1748',
-            'com.android.support:support-core-ui:e72ae29b823889686cff6fcb948d6745c2baf6d4c2af4fdffa1ec1e42e3833a3',
-            'com.android.support:support-fragment:316d35d4d2d2902057efad104a73e4bdb50bee260a7075678185b8cd71170945',
-            'com.android.support.constraint:constraint-layout-solver:8c62525a9bc5cff5633a96cb9b32fffeccaf41b8841aa87fc22607070dea9b8d',
-            'me.dm7.barcodescanner:core:a5c8a704089b58029db166172ed8e55d756877d010a85a0b1c94fdc96ffb8f9a',
-            'com.google.zxing:core:bba7724e02a997cec38213af77133ee8e24b0d5cf5fa7ecbc16a4fa93f11ee0d',
-    ]
+    implementation "com.squareup.okhttp3:okhttp:$rootProject.ext.okHttpVersion"
+    implementation "com.jakewharton.timber:timber:$rootProject.ext.timberVersion"
+
+    implementation 'com.nulab-inc:zxcvbn:1.2.3'
+
+    implementation 'dnsjava:dnsjava:2.1.8'
+    implementation 'org.jitsi:dnssecjava:1.1.3'
+    implementation 'org.slf4j:slf4j-nop:1.7.25'
+
+    testImplementation "junit:junit:$rootProject.ext.junitVersion"
+    testImplementation "org.mockito:mockito-all:$rootProject.ext.mockitoVersion"
+    testImplementation "com.squareup.okhttp3:mockwebserver:$rootProject.ext.okHttpVersion"
+    testImplementation 'org.json:json:20140107'
+    testImplementation 'net.jodah:concurrentunit:0.4.2'
 }

app/src/debug/res/values/strings.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name" translatable="false">monerujo - Debug</string>
+</resources>

app/src/main/AndroidManifest.xml

@@ -3,14 +3,16 @@
     package="com.m2049r.xmrwallet">
 
     <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" />
     <uses-permission android:name="android.permission.WAKE_LOCK" />
     <uses-permission android:name="android.permission.CAMERA" />
+    <uses-permission android:name="android.permission.USE_FINGERPRINT" />
+    <uses-permission android:name="android.permission.NFC" />
 
     <application
-        android:allowBackup="true"
+        android:name=".XmrWalletApplication"
+        android:allowBackup="false"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:supportsRtl="true"
@@ -27,19 +29,25 @@
             android:name=".LoginActivity"
             android:configChanges="orientation|keyboardHidden"
             android:label="@string/app_name"
+            android:launchMode="singleTop"
             android:screenOrientation="portrait">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
-        </activity>
+            <intent-filter>
+                <action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
+            </intent-filter>
 
+            <meta-data
+                android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED"
+                android:resource="@xml/usb_device_filter" />
+        </activity>
+        
         <service
             android:name=".service.WalletService"
             android:description="@string/service_description"
             android:exported="false"
             android:label="Monero Wallet Service" />
-
     </application>
-
 </manifest>

app/src/main/cpp/device_io_monerujo.hpp

@@ -0,0 +1,88 @@
+// Copyright (c) 2017-2018, The Monero Project
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+//
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+//    of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+//
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+
+#if defined(HAVE_MONERUJO)
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/**
+ * @brief LedgerFind - find Ledger Device and return it's name
+ * @param buffer     - buffer for name of found device
+ * @param len        - length of buffer
+ * @return  0 - success
+ *         -1 - no device connected / found
+ *         -2 - JVM not found
+ */
+int LedgerFind(char *buffer, size_t len);
+
+/**
+ * @brief LedgerExchange - exchange data with Ledger Device
+ * @param command        - buffer for data to send
+ * @param cmd_len        - length of send to send
+ * @param response       - buffer for received data
+ * @param max_resp_len   - size of receive buffer
+ *
+ * @return length of received data in response or -1 if error
+ */
+int  LedgerExchange(unsigned char *command, unsigned int cmd_len, unsigned char *response, unsigned int max_resp_len);
+
+#ifdef __cplusplus
+}
+#endif
+
+#include "device_io.hpp"
+
+#pragma once
+
+namespace hw {
+  namespace io {
+    class device_io_monerujo: device_io {
+    public:
+      device_io_monerujo() {};
+      ~device_io_monerujo() {};
+
+      void init() {};
+      void release() {};
+
+      void connect(void *params) {};
+      void disconnect() {};
+      bool connected() const {return true;}; // monerujo is always connected before it gets here
+
+      // returns number of bytes read or -1 on error
+      int  exchange(unsigned char *command, unsigned int cmd_len, unsigned char *response, unsigned int max_resp_len) {
+        return LedgerExchange(command, cmd_len, response, max_resp_len);
+      }
+    };
+  };
+};
+
+#endif //#if defined(HAVE_MONERUJO)

app/src/main/cpp/monerujo.h

@@ -18,6 +18,7 @@
 #define XMRWALLET_WALLET_LIB_H
 
 #include <jni.h>
+
 /*
 #include <android/log.h>
 
@@ -27,13 +28,13 @@
 #define  LOGE(...)  __android_log_print(ANDROID_LOG_ERROR,LOG_TAG,__VA_ARGS__)
 */
 
-jfieldID getHandleField(JNIEnv *env, jobject obj, const char* fieldName = "handle") {
+jfieldID getHandleField(JNIEnv *env, jobject obj, const char *fieldName = "handle") {
     jclass c = env->GetObjectClass(obj);
     return env->GetFieldID(c, fieldName, "J"); // of type long
 }
 
-template <typename T>
-T *getHandle(JNIEnv *env, jobject obj, const char* fieldName = "handle") {
+template<typename T>
+T *getHandle(JNIEnv *env, jobject obj, const char *fieldName = "handle") {
     jlong handle = env->GetLongField(obj, getHandleField(env, obj, fieldName));
     return reinterpret_cast<T *>(handle);
 }
@@ -42,10 +43,35 @@ void setHandleFromLong(JNIEnv *env, jobject obj, jlong handle) {
     env->SetLongField(obj, getHandleField(env, obj), handle);
 }
 
-template <typename T>
+template<typename T>
 void setHandle(JNIEnv *env, jobject obj, T *t) {
     jlong handle = reinterpret_cast<jlong>(t);
     setHandleFromLong(env, obj, handle);
 }
 
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+// from monero-core crypto/hash-ops.h - avoid #including monero code here
+enum {
+    HASH_SIZE = 32,
+    HASH_DATA_AREA = 136
+};
+
+void cn_slow_hash(const void *data, size_t length, char *hash, int variant, int prehashed);
+
+inline void slow_hash(const void *data, const size_t length, char *hash) {
+    cn_slow_hash(data, length, hash, 0 /* variant */, 0/*prehashed*/);
+}
+
+inline void slow_hash_broken(const void *data, char *hash, int variant) {
+    cn_slow_hash(data, 200 /*sizeof(union hash_state)*/, hash, variant, 1 /*prehashed*/);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
 #endif //XMRWALLET_WALLET_LIB_H

app/src/main/java/com/btchip/BTChipException.java

@@ -0,0 +1,53 @@
+/*
+ *******************************************************************************
+ *   BTChip Bitcoin Hardware Wallet Java API
+ *   (c) 2014 BTChip - 1BTChip7VfTnrPra5jqci7ejnMguuHogTn
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *   limitations under the License.
+ ********************************************************************************
+ */
+
+package com.btchip;
+
+public class BTChipException extends Exception {
+
+    private static final long serialVersionUID = 5512803003827126405L;
+
+    public BTChipException(String reason) {
+        super(reason);
+    }
+
+    public BTChipException(String reason, Throwable cause) {
+        super(reason, cause);
+    }
+
+    public BTChipException(String reason, int sw) {
+        super(reason);
+        this.sw = sw;
+    }
+
+    public int getSW() {
+        return sw;
+    }
+
+    public String toString() {
+        if (sw == 0) {
+            return "BTChip Exception : " + getMessage();
+        } else {
+            return "BTChip Exception : " + getMessage() + " " + Integer.toHexString(sw);
+        }
+    }
+
+    private int sw;
+
+}

app/src/main/java/com/btchip/comm/BTChipTransport.java

@@ -0,0 +1,31 @@
+/*
+ *******************************************************************************
+ *   BTChip Bitcoin Hardware Wallet Java API
+ *   (c) 2014 BTChip - 1BTChip7VfTnrPra5jqci7ejnMguuHogTn
+ *   (c) 2018 m2049r
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *   limitations under the License.
+ ********************************************************************************
+ */
+
+package com.btchip.comm;
+
+import com.btchip.BTChipException;
+
+public interface BTChipTransport {
+    public byte[] exchange(byte[] command);
+
+    public void close();
+
+    public void setDebug(boolean debugFlag);
+}

app/src/main/java/com/btchip/comm/LedgerHelper.java

@@ -0,0 +1,126 @@
+/*
+ *******************************************************************************
+ *   BTChip Bitcoin Hardware Wallet Java API
+ *   (c) 2014 BTChip - 1BTChip7VfTnrPra5jqci7ejnMguuHogTn
+ *   (c) 2018 m2049r
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *   limitations under the License.
+ ********************************************************************************
+ */
+
+package com.btchip.comm;
+
+import java.io.ByteArrayOutputStream;
+
+public class LedgerHelper {
+
+    private static final int TAG_APDU = 0x05;
+
+    public static byte[] wrapCommandAPDU(int channel, byte[] command, int packetSize) {
+        ByteArrayOutputStream output = new ByteArrayOutputStream();
+        if (packetSize < 3) {
+            throw new IllegalArgumentException("Can't handle Ledger framing with less than 3 bytes for the report");
+        }
+        int sequenceIdx = 0;
+        int offset = 0;
+        output.write(channel >> 8);
+        output.write(channel);
+        output.write(TAG_APDU);
+        output.write(sequenceIdx >> 8);
+        output.write(sequenceIdx);
+        sequenceIdx++;
+        output.write(command.length >> 8);
+        output.write(command.length);
+        int blockSize = (command.length > packetSize - 7 ? packetSize - 7 : command.length);
+        output.write(command, offset, blockSize);
+        offset += blockSize;
+        while (offset != command.length) {
+            output.write(channel >> 8);
+            output.write(channel);
+            output.write(TAG_APDU);
+            output.write(sequenceIdx >> 8);
+            output.write(sequenceIdx);
+            sequenceIdx++;
+            blockSize = (command.length - offset > packetSize - 5 ? packetSize - 5 : command.length - offset);
+            output.write(command, offset, blockSize);
+            offset += blockSize;
+        }
+        if ((output.size() % packetSize) != 0) {
+            byte[] padding = new byte[packetSize - (output.size() % packetSize)];
+            output.write(padding, 0, padding.length);
+        }
+        return output.toByteArray();
+    }
+
+    public static byte[] unwrapResponseAPDU(int channel, byte[] data, int packetSize) {
+        ByteArrayOutputStream response = new ByteArrayOutputStream();
+        int offset = 0;
+        int responseLength;
+        int sequenceIdx = 0;
+        if ((data == null) || (data.length < 7 + 5)) {
+            return null;
+        }
+        if (data[offset++] != (channel >> 8)) {
+            throw new IllegalArgumentException("Invalid channel");
+        }
+        if (data[offset++] != (channel & 0xff)) {
+            throw new IllegalArgumentException("Invalid channel");
+        }
+        if (data[offset++] != TAG_APDU) {
+            throw new IllegalArgumentException("Invalid tag");
+        }
+        if (data[offset++] != 0x00) {
+            throw new IllegalArgumentException("Invalid sequence");
+        }
+        if (data[offset++] != 0x00) {
+            throw new IllegalArgumentException("Invalid sequence");
+        }
+        responseLength = ((data[offset++] & 0xff) << 8);
+        responseLength |= (data[offset++] & 0xff);
+        if (data.length < 7 + responseLength) {
+            return null;
+        }
+        int blockSize = (responseLength > packetSize - 7 ? packetSize - 7 : responseLength);
+        response.write(data, offset, blockSize);
+        offset += blockSize;
+        while (response.size() != responseLength) {
+            sequenceIdx++;
+            if (offset == data.length) {
+                return null;
+            }
+            if (data[offset++] != (channel >> 8)) {
+                throw new IllegalArgumentException("Invalid channel");
+            }
+            if (data[offset++] != (channel & 0xff)) {
+                throw new IllegalArgumentException("Invalid channel");
+            }
+            if (data[offset++] != TAG_APDU) {
+                throw new IllegalArgumentException("Invalid tag");
+            }
+            if (data[offset++] != (sequenceIdx >> 8)) {
+                throw new IllegalArgumentException("Invalid sequence");
+            }
+            if (data[offset++] != (sequenceIdx & 0xff)) {
+                throw new IllegalArgumentException("Invalid sequence");
+            }
+            blockSize = (responseLength - response.size() > packetSize - 5 ? packetSize - 5 : responseLength - response.size());
+            if (blockSize > data.length - offset) {
+                return null;
+            }
+            response.write(data, offset, blockSize);
+            offset += blockSize;
+        }
+        return response.toByteArray();
+    }
+
+}

app/src/main/java/com/btchip/comm/android/BTChipTransportAndroidHID.java

@@ -0,0 +1,145 @@
+/*
+ *******************************************************************************
+ *   BTChip Bitcoin Hardware Wallet Java API
+ *   (c) 2014 BTChip - 1BTChip7VfTnrPra5jqci7ejnMguuHogTn
+ *   (c) 2018 m2049r
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *   limitations under the License.
+ ********************************************************************************
+ */
+
+package com.btchip.comm.android;
+
+import android.hardware.usb.UsbConstants;
+import android.hardware.usb.UsbDevice;
+import android.hardware.usb.UsbDeviceConnection;
+import android.hardware.usb.UsbEndpoint;
+import android.hardware.usb.UsbInterface;
+import android.hardware.usb.UsbManager;
+import android.hardware.usb.UsbRequest;
+
+import com.btchip.BTChipException;
+import com.btchip.comm.BTChipTransport;
+import com.btchip.comm.LedgerHelper;
+import com.btchip.utils.Dump;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.HashMap;
+
+import timber.log.Timber;
+
+public class BTChipTransportAndroidHID implements BTChipTransport {
+
+    public static UsbDevice getDevice(UsbManager manager) {
+        HashMap<String, UsbDevice> deviceList = manager.getDeviceList();
+        for (UsbDevice device : deviceList.values()) {
+            Timber.d("%04X:%04X %s, %s", device.getVendorId(), device.getProductId(), device.getManufacturerName(), device.getProductName());
+            if ((device.getVendorId() == VID) && (device.getProductId() == PID_HID)) {
+                return device;
+            }
+        }
+        return null;
+    }
+
+    public static BTChipTransport open(UsbManager manager, UsbDevice device) throws IOException {
+        UsbDeviceConnection connection = manager.openDevice(device);
+        if (connection == null) throw new IOException("Device not connected");
+        // Must only be called once permission is granted (see http://developer.android.com/reference/android/hardware/usb/UsbManager.html)
+        // Important if enumerating, rather than being awaken by the intent notification
+        UsbInterface dongleInterface = device.getInterface(0);
+        UsbEndpoint in = null;
+        UsbEndpoint out = null;
+        for (int i = 0; i < dongleInterface.getEndpointCount(); i++) {
+            UsbEndpoint tmpEndpoint = dongleInterface.getEndpoint(i);
+            if (tmpEndpoint.getDirection() == UsbConstants.USB_DIR_IN) {
+                in = tmpEndpoint;
+            } else {
+                out = tmpEndpoint;
+            }
+        }
+        connection.claimInterface(dongleInterface, true);
+        return new BTChipTransportAndroidHID(connection, dongleInterface, in, out);
+    }
+
+    private static final int VID = 0x2C97;
+    private static final int PID_HID = 0x0001;
+
+    private UsbDeviceConnection connection;
+    private UsbInterface dongleInterface;
+    private UsbEndpoint in;
+    private UsbEndpoint out;
+    private byte transferBuffer[];
+    private boolean debug;
+
+    public BTChipTransportAndroidHID(UsbDeviceConnection connection, UsbInterface dongleInterface, UsbEndpoint in, UsbEndpoint out) {
+        this.connection = connection;
+        this.dongleInterface = dongleInterface;
+        this.in = in;
+        this.out = out;
+        transferBuffer = new byte[HID_BUFFER_SIZE];
+    }
+
+    @Override
+    public byte[] exchange(byte[] command) {
+        ByteArrayOutputStream response = new ByteArrayOutputStream();
+        byte[] responseData = null;
+        int offset = 0;
+        if (debug) {
+            Timber.d("=> %s", Dump.dump(command));
+        }
+        command = LedgerHelper.wrapCommandAPDU(LEDGER_DEFAULT_CHANNEL, command, HID_BUFFER_SIZE);
+        UsbRequest requestOut = new UsbRequest();
+        requestOut.initialize(connection, out);
+        while (offset != command.length) {
+            int blockSize = (command.length - offset > HID_BUFFER_SIZE ? HID_BUFFER_SIZE : command.length - offset);
+            System.arraycopy(command, offset, transferBuffer, 0, blockSize);
+            requestOut.queue(ByteBuffer.wrap(transferBuffer), HID_BUFFER_SIZE);
+            connection.requestWait();
+            offset += blockSize;
+        }
+        requestOut.close();
+        ByteBuffer responseBuffer = ByteBuffer.allocate(HID_BUFFER_SIZE);
+        UsbRequest requestIn = new UsbRequest();
+        requestIn.initialize(connection, in);
+        while ((responseData = LedgerHelper.unwrapResponseAPDU(LEDGER_DEFAULT_CHANNEL, response.toByteArray(), HID_BUFFER_SIZE)) == null) {
+            responseBuffer.clear();
+            requestIn.queue(responseBuffer, HID_BUFFER_SIZE);
+            connection.requestWait();
+            responseBuffer.rewind();
+            responseBuffer.get(transferBuffer, 0, HID_BUFFER_SIZE);
+            response.write(transferBuffer, 0, HID_BUFFER_SIZE);
+        }
+        requestIn.close();
+        if (debug) {
+            Timber.d("<= %s", Dump.dump(responseData));
+        }
+        return responseData;
+    }
+
+    @Override
+    public void close() {
+        connection.releaseInterface(dongleInterface);
+        connection.close();
+    }
+
+    @Override
+    public void setDebug(boolean debugFlag) {
+        this.debug = debugFlag;
+    }
+
+    private static final int HID_BUFFER_SIZE = 64;
+    private static final int LEDGER_DEFAULT_CHANNEL = 1;
+    private static final int SW1_DATA_AVAILABLE = 0x61;
+}

app/src/main/java/com/btchip/utils/Dump.java

@@ -0,0 +1,62 @@
+/*
+ *******************************************************************************
+ *   BTChip Bitcoin Hardware Wallet Java API
+ *   (c) 2014 BTChip - 1BTChip7VfTnrPra5jqci7ejnMguuHogTn
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *   limitations under the License.
+ ********************************************************************************
+ */
+
+package com.btchip.utils;
+
+import java.io.ByteArrayOutputStream;
+
+public class Dump {
+
+    public static String dump(byte[] buffer, int offset, int length) {
+        String result = "";
+        for (int i = 0; i < length; i++) {
+            String temp = Integer.toHexString((buffer[offset + i]) & 0xff);
+            if (temp.length() < 2) {
+                temp = "0" + temp;
+            }
+            result += temp;
+        }
+        return result;
+    }
+
+    public static String dump(byte[] buffer) {
+        return dump(buffer, 0, buffer.length);
+    }
+
+    public static byte[] hexToBin(String src) {
+        ByteArrayOutputStream result = new ByteArrayOutputStream();
+        int i = 0;
+        while (i < src.length()) {
+            char x = src.charAt(i);
+            if (!((x >= '0' && x <= '9') || (x >= 'A' && x <= 'F') || (x >= 'a' && x <= 'f'))) {
+                i++;
+                continue;
+            }
+            try {
+                result.write(Integer.valueOf("" + src.charAt(i) + src.charAt(i + 1), 16));
+                i += 2;
+            } catch (Exception e) {
+                return null;
+            }
+        }
+        return result.toByteArray();
+    }
+
+
+}