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基于区块链的毕业设计Ethereum Android SDK – 以太坊Android SDK

本文提供基于区块链的毕业设计国外最新区块链项目源码下载，包括solidity,eth,fabric等blockchain区块链,基于区块链的毕业设计Ethereum Android SDK – 以太坊Android SDK 是一篇很好的国外资料

Ethereum Android SDK

Table of Contents

  • Getting Started
    • Adding Ethereum SDK as a Maven or Gradle Dependency
    • Basic Usage
  • Features at a Glance
    • Create Wallet
    • Import Wallet By Keystore
    • Import Wallet By Private Key
    • Export Keystore
    • Export Private Key
    • Ethereum Balance
    • ERC20 token balance
    • Send Ether
    • Send ERC20 Token

Getting Started

Add jitpack to your root gradle file at the end of repositories:

allprojects {     repositories { 	...         maven { url 'https://jitpack.io'}     } }

Adding Ethereum SDK as a Maven or Gradle Dependency

For “Maven” add this dependency to your module:

<dependency> 	    <groupId>com.github.centerprime</groupId> 	    <artifactId>Ethereum-Client-SDK</artifactId> 	    <version>1.0.8</version> </dependency>

For “Gradle” add this dependency to your module:

dependencies {     implementation 'com.github.centerprime:Ethereum-Client-SDK:1.0.8' }

Basic Usage

Once you have the dependencies set up you can start using CenterPrime by creating a Ethereum Wallet:

import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.widget.Toast; import com.centerprime.ethereum_sdk.EthManager; import io.reactivex.android.schedulers.AndroidSchedulers; import io.reactivex.schedulers.Schedulers;  public class MainActivity extends AppCompatActivity {      @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);          EthManager ethManager = EthManager.getInstance();          String password = "xxxx12345";          ethManager.createWallet(password, this)                 .subscribeOn(Schedulers.io())                 .observeOn(AndroidSchedulers.mainThread())                 .subscribe(wallet -> {                     String walletAddress = wallet.getAddress();                     String keystore = wallet.getKeystore();                 }, error -> {                  });     } }

Congratulations! Now you are a CenterPrime user.

Features at a Glance

Create Wallet

You can create Ethereum Wallet.

EthManager ethManager = EthManager.getInstance(); String password = "xxxx12345"; ethManager.createWallet(password, this)                 .subscribeOn(Schedulers.io())                 .observeOn(AndroidSchedulers.mainThread())                 .subscribe(wallet -> {                     String walletAddress = wallet.getAddress();                     String keystore = wallet.getKeystore();                 }, error -> {                  });

Import Wallet By Keystore

To import Ethereum wallet by keystore you can use a code written below.

EthManager ethManager = EthManager.getInstance(); String password = "xxxx12345"; String keystore = "JSON_FORMAT"; ethManager.importFromKeystore(keystore, password, this)                 .subscribeOn(Schedulers.io())                 .observeOn(AndroidSchedulers.mainThread())                 .subscribe(walletAddress -> {                      Toast.makeText(this, "Wallet Address : " + walletAddress, Toast.LENGTH_SHORT).show();                  }, error -> {                  });

Import Wallet By Private Key

To import Ethereum wallet by private key you can use a code written below.

EthManager ethManager = EthManager.getInstance(); String privateKey = "PRIVATE_KEY"; ethManager.importFromPrivateKey(privateKey, this)                 .subscribeOn(Schedulers.io())                 .observeOn(AndroidSchedulers.mainThread())                 .subscribe(walletAddress -> {                      Toast.makeText(this, "Wallet Address : " + walletAddress, Toast.LENGTH_SHORT).show();                  }, error -> {                  });

Export Keystore

If you want to export wallet address’s keystore you can use a code written below.

EthManager ethManager = EthManager.getInstance(); String walletAddress = "WALLET_ADDRESS"; ethManager.getKeyStore(walletAddress, this)                 .subscribeOn(Schedulers.io())                 .observeOn(AndroidSchedulers.mainThread())                 .subscribe(keystore -> {                      Toast.makeText(this, "Keystore : " + keystore, Toast.LENGTH_SHORT).show();                  }, error -> {                  });

Export Private Key

If you want to export wallet address’s private key you can use a code written below.

EthManager ethManager = EthManager.getInstance(); String walletAddress = "WALLET_ADDRESS"; String password = "WALLET_PASSWORD"; ethManager.exportPrivateKey(walletAddress, password,this)                 .subscribeOn(Schedulers.io())                 .observeOn(AndroidSchedulers.mainThread())                 .subscribe(privatekey -> {                      Toast.makeText(this, "Private Key : " + privatekey, Toast.LENGTH_SHORT).show();                  }, error -> {                  });

Ethereum Balance

To get balance of Ethereum wallet address you can use this code.

EthManager ethManager = EthManager.getInstance(); String walletAddress = "WALLET_ADDRESS"; ethManager.balanceInEth(walletAddress)                 .subscribeOn(Schedulers.io())                 .observeOn(AndroidSchedulers.mainThread())                 .subscribe(balance -> {                      Toast.makeText(this, "Eth Balance : " + balance, Toast.LENGTH_SHORT).show();                  }, error -> {                  });

ERC20 token balance

To get balance of ERC20 token you can use this code.

EthManager ethManager = EthManager.getInstance(); String walletAddress = "WALLET_ADDRESS"; String password = "WALLET_PASSWORD"; String erc20TokenContractAddress = "ERC_20_TOKEN_CONTRACT_ADDRESS"; ethManager.getTokenBalance(walletAddress, password, erc20TokenContractAddress, this)                 .subscribeOn(Schedulers.io())                 .observeOn(AndroidSchedulers.mainThread())                 .subscribe(balance -> {                      Toast.makeText(this, "Token Balance : " + balance, Toast.LENGTH_SHORT).show();                  }, error -> {                  });

Send Ether

To send Ethereum to another wallet address you can use this code.

EthManager ethManager = EthManager.getInstance(); String walletAddress = "WALLET_ADDRESS"; String password = "WALLET_PASSWORD"; BigInteger gasPrice = new BigInteger("GAS_PRICE"); BigInteger gasLimit = new BigInteger("GAS_LIMIT"); BigDecimal etherAmount = new BigDecimal("ETHER_AMOUNT"); String receiverAddress = "RECEIVER_WALLET_ADDRESS"; ethManager.sendEther(walletAddress, password,gasPrice,gasLimit,etherAmount, receiverAddress, this)                 .subscribeOn(Schedulers.io())                 .observeOn(AndroidSchedulers.mainThread())                 .subscribe(tx -> {                      Toast.makeText(this, "TX : " + tx, Toast.LENGTH_SHORT).show();                  }, error -> {                  });

Send ERC20 token

To send ERC20 Token to another wallet address you can use this code.

EthManager ethManager = EthManager.getInstance(); String walletAddress = "WALLET_ADDRESS"; String password = "WALLET_PASSWORD"; BigInteger gasPrice = new BigInteger("GAS_PRICE"); BigInteger gasLimit = new BigInteger("GAS_LIMIT"); BigDecimal tokenAmount = new BigDecimal("TOKEN_AMOUNT"); String receiverAddress = "RECEIVER_WALLET_ADDRESS"; String erc20TokenContractAddress = "ERC20_TOKEN_CONTRACT_ADDRESS"; ethManager.sendToken(walletAddress, password, gasPrice, gasLimit, tokenAmount, receiverAddress, erc20TokenContractAddress, this)                 .subscribeOn(Schedulers.io())                 .observeOn(AndroidSchedulers.mainThread())                 .subscribe(tx -> {                      Toast.makeText(this, "TX : " + tx, Toast.LENGTH_SHORT).show();                  }, error -> {                  });

Ethereum Android SDK

Table of Contents

  • Getting Started
    • Adding Ethereum SDK as a Maven or Gradle Dependency
    • Basic Usage
  • Features at a Glance
    • Create Wallet
    • Import Wallet By Keystore
    • Import Wallet By Private Key
    • Export Keystore
    • Export Private Key
    • Ethereum Balance
    • ERC20 token balance
    • Send Ether
    • Send ERC20 Token

Getting Started

Add jitpack to your root gradle file at the end of repositories:

allprojects {     repositories { 	...         maven { url 'https://jitpack.io'}     } }

Adding Ethereum SDK as a Maven or Gradle Dependency

For “Maven” add this dependency to your module:

<dependency> 	    <groupId>com.github.centerprime</groupId> 	    <artifactId>Ethereum-Client-SDK</artifactId> 	    <version>1.0.8</version> </dependency>

For “Gradle” add this dependency to your module:

dependencies {     implementation 'com.github.centerprime:Ethereum-Client-SDK:1.0.8' }

Basic Usage

Once you have the dependencies set up you can start using CenterPrime by creating a Ethereum Wallet:

import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.widget.Toast; import com.centerprime.ethereum_sdk.EthManager; import io.reactivex.android.schedulers.AndroidSchedulers; import io.reactivex.schedulers.Schedulers;  public class MainActivity extends AppCompatActivity {      @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);          EthManager ethManager = EthManager.getInstance();          String password = "xxxx12345";          ethManager.createWallet(password, this)                 .subscribeOn(Schedulers.io())                 .observeOn(AndroidSchedulers.mainThread())                 .subscribe(wallet -> {                     String walletAddress = wallet.getAddress();                     String keystore = wallet.getKeystore();                 }, error -> {                  });     } }

Congratulations! Now you are a CenterPrime user.

Features at a Glance

Create Wallet

You can create Ethereum Wallet.

EthManager ethManager = EthManager.getInstance(); String password = "xxxx12345"; ethManager.createWallet(password, this)                 .subscribeOn(Schedulers.io())                 .observeOn(AndroidSchedulers.mainThread())                 .subscribe(wallet -> {                     String walletAddress = wallet.getAddress();                     String keystore = wallet.getKeystore();                 }, error -> {                  });

Import Wallet By Keystore

To import Ethereum wallet by keystore you can use a code written below.

EthManager ethManager = EthManager.getInstance(); String password = "xxxx12345"; String keystore = "JSON_FORMAT"; ethManager.importFromKeystore(keystore, password, this)                 .subscribeOn(Schedulers.io())                 .observeOn(AndroidSchedulers.mainThread())                 .subscribe(walletAddress -> {                      Toast.makeText(this, "Wallet Address : " + walletAddress, Toast.LENGTH_SHORT).show();                  }, error -> {                  });

Import Wallet By Private Key

To import Ethereum wallet by private key you can use a code written below.

EthManager ethManager = EthManager.getInstance(); String privateKey = "PRIVATE_KEY"; ethManager.importFromPrivateKey(privateKey, this)                 .subscribeOn(Schedulers.io())                 .observeOn(AndroidSchedulers.mainThread())                 .subscribe(walletAddress -> {                      Toast.makeText(this, "Wallet Address : " + walletAddress, Toast.LENGTH_SHORT).show();                  }, error -> {                  });

Export Keystore

If you want to export wallet address’s keystore you can use a code written below.

EthManager ethManager = EthManager.getInstance(); String walletAddress = "WALLET_ADDRESS"; ethManager.getKeyStore(walletAddress, this)                 .subscribeOn(Schedulers.io())                 .observeOn(AndroidSchedulers.mainThread())                 .subscribe(keystore -> {                      Toast.makeText(this, "Keystore : " + keystore, Toast.LENGTH_SHORT).show();                  }, error -> {                  });

Export Private Key

If you want to export wallet address’s private key you can use a code written below.

EthManager ethManager = EthManager.getInstance(); String walletAddress = "WALLET_ADDRESS"; String password = "WALLET_PASSWORD"; ethManager.exportPrivateKey(walletAddress, password,this)                 .subscribeOn(Schedulers.io())                 .observeOn(AndroidSchedulers.mainThread())                 .subscribe(privatekey -> {                      Toast.makeText(this, "Private Key : " + privatekey, Toast.LENGTH_SHORT).show();                  }, error -> {                  });

Ethereum Balance

To get balance of Ethereum wallet address you can use this code.

EthManager ethManager = EthManager.getInstance(); String walletAddress = "WALLET_ADDRESS"; ethManager.balanceInEth(walletAddress)                 .subscribeOn(Schedulers.io())                 .observeOn(AndroidSchedulers.mainThread())                 .subscribe(balance -> {                      Toast.makeText(this, "Eth Balance : " + balance, Toast.LENGTH_SHORT).show();                  }, error -> {                  });

ERC20 token balance

To get balance of ERC20 token you can use this code.

EthManager ethManager = EthManager.getInstance(); String walletAddress = "WALLET_ADDRESS"; String password = "WALLET_PASSWORD"; String erc20TokenContractAddress = "ERC_20_TOKEN_CONTRACT_ADDRESS"; ethManager.getTokenBalance(walletAddress, password, erc20TokenContractAddress, this)                 .subscribeOn(Schedulers.io())                 .observeOn(AndroidSchedulers.mainThread())                 .subscribe(balance -> {                      Toast.makeText(this, "Token Balance : " + balance, Toast.LENGTH_SHORT).show();                  }, error -> {                  });

Send Ether

To send Ethereum to another wallet address you can use this code.

EthManager ethManager = EthManager.getInstance(); String walletAddress = "WALLET_ADDRESS"; String password = "WALLET_PASSWORD"; BigInteger gasPrice = new BigInteger("GAS_PRICE"); BigInteger gasLimit = new BigInteger("GAS_LIMIT"); BigDecimal etherAmount = new BigDecimal("ETHER_AMOUNT"); String receiverAddress = "RECEIVER_WALLET_ADDRESS"; ethManager.sendEther(walletAddress, password,gasPrice,gasLimit,etherAmount, receiverAddress, this)                 .subscribeOn(Schedulers.io())                 .observeOn(AndroidSchedulers.mainThread())                 .subscribe(tx -> {                      Toast.makeText(this, "TX : " + tx, Toast.LENGTH_SHORT).show();                  }, error -> {                  });

Send ERC20 token

To send ERC20 Token to another wallet address you can use this code.

EthManager ethManager = EthManager.getInstance(); String walletAddress = "WALLET_ADDRESS"; String password = "WALLET_PASSWORD"; BigInteger gasPrice = new BigInteger("GAS_PRICE"); BigInteger gasLimit = new BigInteger("GAS_LIMIT"); BigDecimal tokenAmount = new BigDecimal("TOKEN_AMOUNT"); String receiverAddress = "RECEIVER_WALLET_ADDRESS"; String erc20TokenContractAddress = "ERC20_TOKEN_CONTRACT_ADDRESS"; ethManager.sendToken(walletAddress, password, gasPrice, gasLimit, tokenAmount, receiverAddress, erc20TokenContractAddress, this)                 .subscribeOn(Schedulers.io())                 .observeOn(AndroidSchedulers.mainThread())                 .subscribe(tx -> {                      Toast.makeText(this, "TX : " + tx, Toast.LENGTH_SHORT).show();                  }, error -> {                  });

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