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Questions tagged [android]

Collects general questions about using Bitcoin on Android devices. For questions about the popular wallet use btc-wallet-for-android.

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21 views

How to create raw transaction in bitcoinj

I'm using bitcoinj for transfering bitcoin. I want to create raw transaction using bitcoinj. Please help who know this.
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0answers
13 views

What is the most reliable Bitcoin lightning wallet for android as of 2018 October?

I see that there are a few android bitcoin lightning wallets as of 2018 October, but which one is the most stable ready to be used? I see Eclair and Lighning Wallet as 2 options, but I wasn't sure if ...
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0answers
8 views

Bitcoinj - Peer downloads sometimes stall when trying to resync chain

Sometimes when I'm trying to replay the chain into a wallet that I am importing, the chain sync will stall. This seems to always happen at blocksLeft == 15, which means 15 blocks away from the ...
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0answers
23 views

Import private key

I'm using bitcoinj library for bitcoin transactions. I want to import private key in my wallet using bitcoinj. How can I do that? Please help me who knows. Thanks.
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1answer
19 views

Get private-keys from bitcoinj

I'm using bitcoinj library for bitcoin. I want all private keys of all my generated addresses. How can I achieve that? Please help who knows this answer. Thanks.
0
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1answer
42 views

Change derive path

I've used bitcoinj wallet and used derive path as below. public static final ImmutableList<ChildNumber> ACCOUNT_ZERO_PATH = ImmutableList.of(ChildNumber.ZERO_HARDENED); But I made changes in ...
1
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1answer
51 views

how to validate testnet and mainnet bitcoin address via online api or offline for Android App?

I would like to know web api provider to validate Mainnet & Testet3 Bitcoin Address. How to validate a Bitcoin address is a real one? Validate bitcoin address from android application Gone ...
1
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2answers
62 views

How to display a list of incoming bitcoin Transaction history in my own wallet?

I have gone through various references including How to get a history of incoming and outgoing transactions for a certain address? Fetch list of transaction where i have received the bitcoin? I am ...
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1answer
23 views

Bitcoinj Standard

I'm using bitcoinj for transferring bitcoin. I don't know which standard bitcoinj supports? Bip32, Bip39, or Bip44 Please help who knows the answer. Also I want convert bitcoinj standard to Bip44. ...
1
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1answer
54 views

Get private-keys from wallet using bitcoinj

I'm using bitcoinj for transferring bitcoin. Now I want to export private key of my wallet. So how can I get the private key from bitcoinj?
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1answer
39 views

Issue with the BitcoinJ for Litecoin. Which dependency can be used for Litecoin?

I've created a crypto-currency wallet for Bitcoin using BitcoinJ. Now I want to add Litecoin in this wallet. How to implement BitcoinJ dependency for Litecoin? While using BitcoinJ for both Litecoin ...
0
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1answer
11 views

bitcoin transfer without creating wallet

My question is about transferring bitcoin between two addresses without having a wallet. Here is my idea of transferring bitcoins in following way: Idea: I have my own Android Application. I am ...
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0answers
46 views

how to avoid blockchain downloading in bitcoinj?

I have created a bitcoin wallet with bitcoinj. It works with transactions very concurrently but after downloading whole blockchain. There is any way to avoid this downloading or faster downloading of ...
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0answers
35 views

DuplicateRelativeFileException

when I implements this two depencies in my project for btc implementation 'org.bitcoinj:bitcoinj-core:0.14.7' for bch implementation 'cash.bitcoinj:bitcoincashj-examples:0.14.5.2' this error will ...
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0answers
51 views

How do I get bitcoin cash wallet balance in bitcoinj?

I have using this method to get balance. kit.wallet().getBalance().toFriendlyString(); But it only gives me refreshed address balance. and it also 0 BTC.
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0answers
28 views

how to use bitcoinj for Litecoin wallet?

I have created a wallet app. In this wallet I have using bitcoinj liabrary. when I import ltc private key it creates btc address. How to restore ltc wallet by importing private key.
0
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1answer
49 views

Restore from 24 words seed

I have used bitcoinj for createting wallet. I made some changes and try to generate 24 words seed instead of 12 words seed. When I try to restore from 24 words seed, at that time I am using 3 method ...
0
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1answer
76 views

convert 12 word seed into 24 word seed

I used bitcoinj library for wallet and it generates 12 word mnemonic seed. But I made changes in it and created 24 word mnemonic seed. But I need to convert old 12 word mnemonic seed into new 24 ...
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0answers
26 views

Getting old address while restoring

Long CreationTimeSeconds = Pref.getValue(activity, Config.PREF_CreationTimeSeconds, System.currentTimeMillis()); List<String> strlist = UtilsFunctions.getMnemoniWordlist(activity)...
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0answers
105 views

Older Android Bitcoin Wallet Backup, Bitcoins lost because of transactions done afterwards?

I use the Android Bitcoin Wallet App (https://play.google.com/store/apps/details?id=de.schildbach.wallet). I have an old backup from my wallet and also still know the password. My old phone crashed ...
1
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1answer
114 views

Bitcoin wallet on smart phone drains battery a lot?

I downloaded Android Bitcoin Wallet (version 6.17) on my android phone, and realized that the app drains battery a lot. The system showed 40% of battery was used to the wallet. Does anyone have same ...
0
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0answers
89 views

Build specific scriptPubKey

Help! I try to build specific scriptPubKey for output using bitcoinj library. It should look like this: 1 OP_DROP 54657374313131 5 OP_2DROP 3355185 OP_DROP OP_DUP OP_HASH160 ...
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0answers
17 views

How can I set up a phone to be my offline wallet?

I have old Android/iOS devices and I want to set up one of them to be my offline bitcoin wallet. I will make the device offline (flight mode), and fully encrypted with a strong password. I hope ...
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0answers
62 views

Where can I get Copay wallet APK?

Their Github does not have the latest APK and I want to sideload the app on my tablet.
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1answer
216 views

Can legacy wallets with 1xxx addresses send to segwit 3xxx and bc1xxx addresses like mycellium that only does 1xxx addresses?

I have mycellium for android and currently they dont support any segwit addresses that has 3xxx or bc1xxx. Can I send out from my mycellium 1xxx address to my segwit 3xxx or bc1xxx address that I ...
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0answers
19 views

Are any use of android arm h3 device? It mediaplayer always turned on

I have mediaplayer always on, it have enough powerful processor, and never turned off(switch only TV, not device). Is it possible to use for mining? What software I need to install for android? May be ...
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1answer
81 views

Android on Copay still available?

Hi I was downloading Copay and it said ; WARNING: Chrome App will not longer be supported Google has announced that it will be ending support for Chrome Apps on non-Chrome OS platforms in 2018....
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0answers
72 views

I found an old android wallet backup file from 2013, but can't restore it

I recently found an old wallet backup file called "bitcoin-wallet-keys-2013-06-01-android-sgs2" I tried to restore it with the schildbach-wallet but it will not recognize the file, i.e. I cannot ...
0
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1answer
3k views

Build a wallet for Android and iOS for a self-made cryptocurrency

I've built a cryptocurrency of my own using this video guide. I did the first 4 steps out of 6, as the 5th level is about building a wallet for Windows platform. I have started creating this ...
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0answers
74 views

trouble recovering BCH coinomi wallet

Cannot recover coinomi wallet on android. erased data cache on android. android has back up but I don't know how to access back up. recovery phrase not working.
2
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1answer
370 views

How to create an offline wallet on Android only to sign transaction

I am new to bitcoins, I want to create an offline wallet on Android, to scan transaction QR code from online Desktop wallet, Sign that transaction with private key on my offline wallet. 1 Creating ...
0
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1answer
146 views

Bitcoin Wallet for Android - permission denied decrypting the wallet backup file using OpenSSL

I've followed the advice found on the https://github.com/bitcoin-wallet/bitcoin-wallet/blob/master/wallet/README.recover.md, but I'm having issues decrypted a wallet backup file When I run below line ...
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votes
3answers
581 views

Full block chain on a mobile phone

The full block chain size is currently roughly 145GB, I can handle such a download in a laptop or a desktop pc but how does it work on a mobile? I cannot download such an amount of data into my phone, ...
0
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1answer
490 views

Using a dedicated phone as “hardware wallet”

Is there anything inherently insecure about using a dedicated Android phone as a "hardware wallet"? A dedicated phone implies: a clean ROM without gapps, i.e. Lineage OS without root full phone ...
1
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2answers
374 views

How to track multiple bitcoin addresses?

Let's say I have multiple (N) wallets, with N public addresses and N private addresses. Is there a simple way to track the balance (and transactions, but this is not so important) of those wallets? ...
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0answers
63 views

Store or derive HD keys on the fly?

Let's say I'd like to develop a mobile HD wallet. After reading chapter 5 of Mastering Bitcoin I have a fairly good understanding of how keys will be generated using BIP32/BIP44. My question now is ...
1
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0answers
106 views

How return transaction hash from wallet to android app after payment?

Scenario: I have my android app where customers can pay by bitcoins. For this I created intent with uri like: bitcoin:[address]?amount=.. and using startActivityForResult it opens wallet with ...
0
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1answer
525 views

Bitcoin Wallet for Android/Windows with Full Control of BTC (keys) [duplicate]

I used to manage my bitcoin by using MultiBit for Windows. I had full control of them, without any involvement from a 3rd party. But as a person i know wanted to get bitcoin and a Android wallet, i ...
1
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0answers
743 views

How to claim bitcoin cash for Bitcoin Wallet backup created before 1st August2017?

I use this bitcoin wallet for android for my bitcoins.. I had created backup well before 1st August 2017 from Safety>>Backup My Wallet.. The backup is encrypted with name bitcoin-wallet-backup-2017-...
8
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3answers
3k views

Claim Bitcoin cash from android bitcoin app

I have some bitcoin stored in the bitcoin wallet android app I want to transfer my inherited Bitcoin Cash (BCC) to an exchange. The android app doesn't care about BCC. I tried to decode a backup of ...
0
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1answer
556 views

Bitcoin Wallet for Android - Issues decrypting the wallet backup BIN file using OpenSSL

I've followed the advice found here and also on the Github article linked from that post, but I'm still having issues decrypted a wallet backup using the latest version of Bitcoin Wallet on Android (...
0
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1answer
198 views

WalletAppKit creates an address every time Bitcoinj gets initialized

I'm implementing an app using BitcoinJ, but every time I run the code, a new address is created. Is there any way to work with the very first address that was created and stop creating new addresses? ...
3
votes
2answers
2k views

How do I spend a paper wallet into my coinbase.com account using the Android Coinbase app and the paper wallet QR code?

I created a paper wallet using bitaddress.org and spent bitcoins into it using the Coinbase mobile (Android App). I then noticed that the paper wallet cut off part of the private key during printing! ...
0
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0answers
83 views

Is there any mobile wallet that allows to do Bitcoin Transaction with zero fee?

When I try to make a transaction with Economic Fee mode on Bitcoin Android App.. Its imposes a minimum fee of 0.00005675BTC.. So is there any android app or computer bitcoin wallet (except Bitcoin-qt) ...
3
votes
1answer
2k views

Create Android Alt Coin Wallet

I am looking for base steps or general guidelines how to create lightweight android wallet for existing alt coin "X". So, lets start with simple questions: Do I need to run a node on the server Can ...
3
votes
1answer
550 views

Are there any POS coin open source mobile wallets implementations?

Specifically, I'm interested in the thick clients with Simplified Payment Verification. Haven't found these so far, do they even exist? Why are the POS mobile wallets such poorly distributed ...
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2answers
420 views

How to access bitcoin wallet on an android that became unresponsive?

My Galaxy S4 mini suddenly stopped working for no apparent reason. It won't turn on via any recommended action or new battery, recovery software from the laptop can't seem to connect as a result. I ...
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2answers
358 views

how do i programmatically find out whether this phone has a wallet with at least a certain arbitrary amount of bitcoin in it?

the use case is: i have a bitcoin-aware app A, which would then like to trigger a bitcoin payment request to be executed by an on-phone bitcoin wallet via the BIB20/bitcoin: URL mechanism. Rather ...
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2answers
67 views

Removing Bitcoin from my phone to secure storage

I am using the following Bitcoin wallet for Android: https://github.com/bitcoin-wallet/bitcoin-wallet My device is encrypted and I have encrypted backup files on Google Drive. However, I'd like to ...
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1answer
102 views

How to change the displayed denomination in GreenBits Android wallet?

I just installed GreenBits, the native Java wallet from GreenAddress.it, on my Android device and transferred 0.1 BTC to the wallet. I like it so far. However, it displays my balance as 100,000 bits. ...