Questions tagged [android]

For questions regarding installation, configuration, running and debugging Ethereum software specifically on the Android operating system.

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21
votes
0answers
540 views

E/Go: fatal error: thread exhaustion

I am experimenting with the geth-android library with light-client and in-process node from @karalabe. I could successfully sync with the testnet node from @phonikg, unfortunately this one is down now....
17
votes
1answer
363 views

Can Ethereum be pruned to the extent that it could be run from a Raspberry Pi?

What are the limits to how much the ETH blockchain can be pruned. Will ETH ever be practical on devices with limited resources such as a Raspberry Pi, Android or iOS wallet?
13
votes
4answers
10k views

Are there any android wallets for Ethereum? [closed]

What Ethereum wallets are available for Android? Or which ones are still being developed?
11
votes
1answer
1k views

How to connect an Android App user to ethereum network?

I'm working on developing a decentralized application which requires every user of the Android app to have separate account containing his ether balance information and other user-specific information....
8
votes
2answers
2k views

Ethereum light client roadmap?

The Ethereum roadmap makes no mention about when to expect a light client. Anyone has any insights on when we could expect to see a light client that could efficiently run on, say, an Android device?
8
votes
2answers
1k views

Light clients for android

I am trying to develop an android wallet using Ethereum go and I ran the DroidGeth from this link. I tried to ran ethereum on the testnet, but its taking for ever to download the blockchain. How can ...
8
votes
1answer
2k views

What can I use to interact with the Ethereum network from an Android device?

From my research, until I can build an Ethereum node on an Android device I’ll need to use a public API to interact with the network, such as BlockApps (http://www.blockapps.net/documentation#...
8
votes
1answer
544 views

No signer to authorize the transaction with

When trying to make a transaction on a boundContract with geth-api through the library of @karalabe. I am missing a way to get the signer. I only see the interface for signer in the aar but no way to ...
5
votes
2answers
801 views

Is there an iOS equivalent for the Android web3j (json-rpc) library?

This question (Ethereum library for iOS/Android?) showed me the way to web3j, but I also need a similar solution for iOS. Does anyone know of such a project?
5
votes
1answer
457 views

Mobile Light Client Networking

I've been able to create a private networking using the command line Geth tools, so I have been trying to recreate it using the Android light client Geth. On the command line Geth, I made sure the ...
4
votes
4answers
5k views

Ethereum library for iOS/Android?

Are there any existing native libraries (not whole wallets, I do not need a UI but want to sign transactions and call smart contract functions embedded in another app) for iOS or Android? If not, are ...
4
votes
1answer
984 views

How do I get the raw private key from a WalletFile object?

How can I get the raw private key from a WalletFile object? Here is how I am creating the wallet. String seed = UUID.randomUUID().toString(); ECKeyPair exKey = Keys.createEcKeyPair(); BigInteger ...
4
votes
2answers
3k views

Generating Ethereum Private Key,Public Key On Mobile (Android/Java)

I'm looking for a way to generate Ethereum private keys and public keys inside an Android app. I've scavenged the web and ultimately decided to tear apart the code to myetherwallet and import the same ...
4
votes
2answers
73 views

Is there an ethereum android wallet where I don't have to manually add in tokens I have and just auto detects it?

Using coinomi or even metamask on chrome is quite annoying as I need to manually add in tokens I have in my account and it doesn't auto show up. Is there an android or desktop ethereum wallet that ...
4
votes
0answers
401 views

Is there an app to read QR code of smartcontract bytecode and trigger it?

I want to know if there is a workaround for a smartphone user to simply scan a QR code that would trigger a transaction using a custom smartcontract (not a native currency). The contract would behave ...
3
votes
1answer
2k views

Create ethereum wallet inside android dapp

I am creating a DApp for android and want to be able to create a wallet for each user when they register. I am using web3j, can see how to make wallets in the command line but can't see how to do it ...
3
votes
1answer
1k views

Starting a private geth node on android studio?

I want to start a private node of go-ethereum on android-studio. I have tried this to start a private node but I am getting the error geth not running: https://github.com/karalabe/geth-sandbox/tree/...
3
votes
1answer
2k views

Android Ethereum wallet for a private blockchain?

Is there any android wallet that can be customized to operate on a private Ethereum blockchain? I need to send/receive transactions and run simple queries on the blockchain data. I'm not looking for ...
3
votes
0answers
95 views

Time to first block

I am experience long waiting times from start of the block-sync to the first block. Is there any way I can speed this up? 02-08 17:21:37.971 23640 23659 E GoLog : I0208 16:21:37.980483 eth/...
3
votes
0answers
300 views

tyring to sync ropsten testnet with android-inproc: Rolled back 2 headers

I am trying to sync the new testnet with the android inproc node ( tried with geth-1.5.3, geth-1.5.4-SNAPSHOT and geth-1.5.5-SNAPSHOT ) getting this log: 11-28 20:00:29.957 6637 6861 E GoLog : ...
2
votes
1answer
3k views

“retrieved hash chain is invalid”

I am currently having problems syncing with rinkeby - was working (very) fine before - anyone else experiencing this? 04-21 03:11:59.352 24740 24767 E GoLog : INFO [04-21|01:11:59] Block ...
2
votes
2answers
345 views

Android Geth failed to connect to main net

Following the Android sample code from Mobile Client, along with latest geth.aar fetched from Go Ethereum Downloads (stable release 1.7.3 and development release 1.8.0). I am not able to connect to ...
2
votes
2answers
3k views

Integrate web3.js into a native iOS & Android Apps

Integrating web3.js into a native iOS & Android Apps has issues. I am having difficulty integrating web3.js into a native mobile App (iOS & Android), would it be reasonable to use a cloud ...
2
votes
1answer
421 views

Would running an ethereum node of a private network in android drain battery?

I am building an android application where users can pay for items they buy with ether. Application will use a private ethereum network. As I understood, I have to run an ethereum node in the android ...
2
votes
2answers
835 views

Out Of Memory exception when using web3j in Android

I'm trying to integrate web3j in an android application. But the library gives an Out Of Memory exception when loading the wallet file: Credentials credentials = WalletUtils.loadCredentials("password"...
2
votes
1answer
435 views

How can you connect to a private chain with the Android client library?

There doesn't seem to be much documentation for the mobile Ethereum libraries yet, at least that I could find. I know they are still in development, but is there any way to set the Genesis file ...
2
votes
0answers
111 views

Android Studio And Ethereum?

how i can connect android studio application with Ganache? i'm trying to build an application on android (that is my Front end) with a Smart contract (Back end) on my private Blockchain (Ganache). it'...
2
votes
1answer
323 views

Can the Android Metamask Extension be used with DApps?

I've successfully downloaded the Metamask Firefox Add-on, and imported my wallet into it. However I'm failing to see how I can use this add-on from within my DApp like I do on Chrome, using the ...
2
votes
1answer
273 views

Is there an Ethereum Testnet Android Wallet?

I am looking for a testnet-specific Android wallet app to load with a few Ropsten test Ether, for a web app I'm building. But for the life of me, I cannot find such an app for Ethereum. For Bitcoin I'...
2
votes
0answers
107 views

Tutorials for creating ethereum wallet in android?

I saw a similarly named question over here but I sort of felt like it was closed by linking an irrelevant question which just lists existing ethereum wallets. As I understand, I should have the ...
2
votes
0answers
447 views

JsonParseException while generating java wrapper object with web3j

so a few weeks ago I created a java wrapper object with web3j for a smart contract and was able to work with it with no problems. following exactly what I did a few weeks ago I keep getting a ...
2
votes
0answers
1k views

How to integrate smart contracts with android app using web3j

I want to integrate smart contracts with the android app. I wrote a simple smart contract and I want to call that smart contract from android app. For example, in UI part of Android, I put one ...
2
votes
0answers
330 views

mobile geth not connecting to peers

I want to have a mobile geth implementation on my android device and started with this code: https://github.com/ethereum/go-ethereum/wiki/Mobile-Clients:-Libraries-and-Inproc-Ethereum-Nodes . Then i ...
1
vote
5answers
2k views

How to invoke functions of Smart Contract from Android phone?

I deployed a smart contract with solidity along with a GUI by Javascript and HTML. This project works well on my computer. Now I want to invoke functions of Smart Contract from Android phone. Is ...
1
vote
2answers
2k views

create a mobile wallet for my ERC20

Does anyone know if is there any open source code mobile wallet (Android or IOS) that i can use to store and transfer my custom ERC20 token. I would like to be able to modify it in order to allow it ...
1
vote
1answer
1k views

How to store user private keys and details

I am creating an android DApp and have used go-ethereum to create wallets for users when they create an account. This stores the private key on their device. I want to also keep all of their details ...
1
vote
1answer
39 views

Is it worthwhile to store my supply chain product data on the blockchain using a smart contract? [closed]

I'm currently developing an android app that uses the Web3j framework (Java) to interact with my private Ethereum blockchain (running on Ganache). The app is a supply chain tool that will let users ...
1
vote
1answer
684 views

How get Ethereum address using phrase only in Android

I want to get Etherum address and private key by adding Phrase (or Password) everytime. I tried by following many gihub code.It gives different private key everytime. In Web3j, I found it is based on ...
1
vote
2answers
1k views

Create ethereum address from seed

I want to create ethereum address from seed. Please help me to create ethereum address from seed.
1
vote
1answer
68 views

Unable to load smart contract using web3j on android

What I'my trying to do is to load already deployed smart contract and interact with it. The problem is that after my credentials are being created properly, the error is being catched but the message ...
1
vote
1answer
62 views

Generate Ethereum Address

I have used Geth.aar library for generating ethereum address from 24 word seed. But every time I got new address. I need same address every time. Please help me with this.
1
vote
1answer
1k views

Ethereum mining on Android?

Is it possible to mine Ethereum on an Android device? I know it may be inefficient, but still I want to see if I can develop and app that mines Ethereum on Android. Thanks in advance.
1
vote
1answer
331 views

Do you know any good code sample of Web3j with Android? [closed]

Do you have any good code sample of Web3j with Android? There is an example in the official docs, but I don't think it is not well self explanatory. I'd like to see an example of wallet generating or ...
1
vote
1answer
448 views

How to call a deployed smart contract methods from android

I deployed a smart contract into my private network using truffle framework. After deployed the contract I implemented a client interface using android from android I want to call the methods of ...
1
vote
1answer
583 views

Error when calling a function of a smart contract with web3j

I am trying to use a function which returns a value of the smart contract (pakoin). contract Pacoin { /* This creates an array with all balances */ mapping (address => uint256) public ...
1
vote
1answer
1k views

Failed to check docker installation: exec: “docker”: executable file not found in $PATH

I am trying to create an Android Node for Ethereum using go implementation. I am following this link - https://github.com/Seedstars/go-ethereaum-android. During installation process I am running below ...
1
vote
1answer
692 views

How to do a testnet transaction on Android with Geth 1.5.9?

I'm trying to build a DApp on Android with Geth 1.5.9. After some research and coding I managed to find the information to install/run a geth node and also create some accounts with Android Studio. ...
1
vote
2answers
130 views

Is there any way to install an Ethereum wallet on a Non-Google Android device?

I have an Android device running Cyanogen Mod without Google services, but it seems all Android applications for Ethereum ship via Google Play only. I kindly requested the Jaxx developers multiple ...
1
vote
1answer
16 views

Which is the best mobile platform to develop a blockchain based mobile application

I am new to the blockchain technology. For my semester porject i have to debelop a blockchain based healthdata management system. That includes a blockchain developed using ethereum to store the data ...
1
vote
0answers
30 views

Are there any web3 libraries for react-native or for android light-client?

I want to create a chat application using the whisper protocol for android platform , But I'm trying to use the current web3 package with react-native but I'm unable to use it as web3 package has ...