首先根目录gradle中添加依赖：
classpath "com.google.protobuf:protobuf-gradle-plugin:0.8.3"然后项目文件中添加plugin，添加依赖包：
apply plugin: 'com.google.protobuf'protobuf { protoc { artifact = 'com.google.protobuf:protoc:3.6.1' } plugins { javalite { artifact = "com.google.protobuf:protoc-gen-javalite:3.0.0" } grpc { artifact = 'io.grpc:protoc-gen-grpc-java:1.17.1' } } generateProtoTasks { all().each { task -> task.plugins { javalite {} grpc { // Options added to --grpc_out option 'lite' } } } } configurations { all*.exclude group: 'com.android.support', module: 'support-v13' }}dependencies { api 'io.grpc:grpc-okhttp:1.17.1' api 'io.grpc:grpc-protobuf-lite:1.17.1' api 'io.grpc:grpc-stub:1.17.1' }最后main下添加proto路径，添加proto文件；
2：tron基础类
关于tron的基础类，我整理了个lib，使用时直接导入lib即可。
主要包括wallet钱包类，管理类等内容。
这里我主要贴出wallet的代码
package org.tron.walletserver;import android.os.Build;import android.support.annotation.RequiresApi;import org.tron.common.crypto.ECKey;import org.tron.common.utils.Utils;import java.math.BigInteger;public class Wallet { private ECKey mECKey = null; private boolean isWatchOnly = false; private boolean isColdWallet = false; private String walletName = ""; private String encPassword = ""; private String address = ""; private byte[] encPrivateKey; private byte[] publicKey; public Wallet() { } public Wallet(boolean generateECKey) { if(generateECKey) { mECKey = new ECKey(Utils.getRandom()); } } @RequiresApi(api = Build.VERSION_CODES.KITKAT) public Wallet(String privateKey) { setPrivateKey(privateKey); } public boolean isOpen() { return mECKey != null && mECKey.getPrivKeyBytes() != null; } @RequiresApi(api = Build.VERSION_CODES.KITKAT) public boolean open(String password) { if(encPrivateKey != null) { setPrivateKey(AddressUtils.decryptPrivateKey(encPrivateKey, password)); return isOpen(); } else { return false; } } public byte[] getPublicKey() { return mECKey != null ? mECKey.getPubKey() : publicKey; } public void setPublicKey(byte[] publicKey) { this.publicKey = publicKey; } public byte[] getPrivateKey() { return mECKey != null ? mECKey.getPrivKeyBytes() : null; } @RequiresApi(api = Build.VERSION_CODES.KITKAT) public void setPrivateKey(String privateKey) { if(privateKey != null && !privateKey.isEmpty()) { ECKey tempKey = null; try { BigInteger priK = new BigInteger(privateKey, 16); tempKey = ECKey.fromPrivate(priK); } catch (Exception ex) { ex.printStackTrace(); } mECKey = tempKey; } else { mECKey = null; } } public boolean isWatchOnly() { return isWatchOnly; } public void setWatchOnly(boolean watchOnly) { isWatchOnly = watchOnly; } public boolean isColdWallet() { return isColdWallet; } public void setColdWallet(boolean coldWallet) { isColdWallet = coldWallet; } public String getWalletName() { return walletName; } public void setWalletName(String walletName) { this.walletName = walletName; } public String getEncryptedPassword() { return encPassword; } public void setEncryptedPassword(String password) { this.encPassword = password; } @RequiresApi(api = Build.VERSION_CODES.KITKAT) public String getAddress() { if(mECKey != null) { return AddressUtils.encode58Check(mECKey.getAddress()); } else if (publicKey != null){ return AddressUtils.encode58Check(ECKey.fromPublicOnly(publicKey).getAddress()); } else { return address; } } public void setAddress(String address) { this.address = address; } public ECKey getECKey() { return mECKey; } public byte[] getEncryptedPrivateKey() { return encPrivateKey; } public void setEncryptedPrivateKey(byte[] encPrivateKey) { this.encPrivateKey = encPrivateKey; }} 3：导入钱包
其实就一步操作，就是根据私钥 创建wallet对象。
//根据私钥创建钱包 Wallet wallet = new Wallet(privateKey);//设置钱包名称，我这里不需要就设置成钱包地址了。 wallet.setWalletName(wallet.getAddress());//项目存储导入的钱包 TronManager.storeTron(wallet); 4：创建钱包创建钱包需要两个参数，一个是钱包名称，一个是设置的密码，钱包名称还好，重要的是密码，因为转账，导出私钥助记词等信息时，都是需要密码验证的。
Wallet wallet = new Wallet(true);wallet.setWalletName(name);WalletManager.store(this,wallet, pwd);store方法是使用SharedPreferences存储当前钱包的信息，其中我们可以通过密码来获取wallet的eckey从而得到钱包的公钥和私钥。
5：钱包信息这里主要用到项目中grpcClient类和walletmanager类。
这个类主要封装了对应的网络请求以及钱包管理
grpcClient类的initGrpc需要传入对应的fullnode和soliditynode，这个可以去下面的地址去选择，
https://github.com/tronprotocol/Documentation/blob/master/TRX_CN/Official_Public_Node.md
查询账户需要用到账户的地址：
Protocol.Account account = WalletManager.queryAccount(address, false);GrpcAPI.AccountNetMessage accountNetMessage = WalletManager.getAccountNet(address);GrpcAPI.AccountResourceMessage accountResMessage = WalletManager.getAccountRes(address);account可以查询balance和FrozenList；
accountNetMessage 可以查询账户的带宽信息。
具体代码如下：
double balance=mAccount.getBalance()/1000000.0d; binding.tvWalletAccount.setText(balance+""); long frozenTotal = 0; for(Protocol.Account.Frozen frozen : mAccount.getFrozenList()) { frozenTotal += frozen.getFrozenBalance(); } binding.tvWalletTronWeight.setText((frozenTotal/1000000)+""); GrpcAPI.AccountNetMessage accountNetMessage = TronUtil.getAccountNet(getActivity(), wallet.getWalletName()); long bandwidth = accountNetMessage.getNetLimit() + accountNetMessage.getFreeNetLimit(); long bandwidthUsed = accountNetMessage.getNetUsed()+accountNetMessage.getFreeNetUsed(); long bandwidthLeft = bandwidth - bandwidthUsed; binding.tvWalletBandwidth.setText(bandwidthLeft+"");6：转账
byte[] toRaw; try { toRaw = WalletManager.decodeFromBase58Check(sendAddress); } catch (IllegalArgumentException ignored) { Toast.makeText(this,"请输入一个有效地址",Toast.LENGTH_SHORT).show(); return; } double amount=Double.parseDouble(sendAmount); Contract.TransferContract contract = WalletManager.createTransferContract(toRaw, WalletManager.decodeFromBase58Check(mWallet.getAddress()), (long) (amount * 1000000.0d)); Protocol.Transaction transaction = WalletManager.createTransaction4Transfer(contract); byte[] mTransactionBytes = transaction.toByteArray(); try { mTransactionUnsigned = Protocol.Transaction.parseFrom(mTransactionBytes); } catch (InvalidProtocolBufferException e) { e.printStackTrace(); }
根据上面的代码，获取到mTransactionUnsigned ，然后输入密码校验密码并获取到wallet的eckey。
设置时间戳，交易签名。
mTransactionSigned = TransactionUtils.setTimestamp(mTransactionUnsigned);mTransactionSigned = TransactionUtils.sign(mTransactionSigned, mWallet.getECKey());WalletManager.broadcastTransaction(mTransactionSigned);最后一步是广播交易。
具体操作可查看源代码。
git地址