Android通过JNI操作串口《三》

来源：互联网发布：c语言基础编程题编辑：程序博客网时间：2024/05/20 09:43

4. JAVA层封装本地方法

package com.notioni.uart.manager;

import com.notioni.uart.manager.TtyNativeControl.ReceiveCallback;

*单例模式

publicclass UARTCTLManager {

private TtyNativeControlmTtyControl;

privatebooleanmIsOpen =false;

privatestatic UARTCTLManagermManager;

private UARTCTLManager(){

mTtyControl =new TtyNativeControl();

}

publicstatic UARTCTLManager getInstance(){

if(mManager == null){

mManager =new UARTCTLManager();

}

returnmManager;

}

* 打开驱动

publicint openDevice(){

int o =mTtyControl.openTty();

o=1;

if(o == 1){

mIsOpen =true;

}

return o;

}

* 关闭驱动

publicint closeDevice(){

int c =mTtyControl.closeTty();

if(c == 1){

mIsOpen =false;

}

return c;

}

* 判断驱动是否打开

publicboolean isOpenDevice(){

returnmIsOpen;

}

* 发送数据

publicint sendDataToDevice(byte[] data){

returnmTtyControl.sendMsgToTty(data);

}

* 注入接收数据回调方法

publicvoid receiveDataFromDevice(ReceiveCallback callback){

mTtyControl.receiveMsgFromTty(callback);

}

/**

* 设置串口数据位，校验位,速率，停止位

* @param databits 数据位取值位7或8

* @param event 校验类型取值N ,E, O,,S

* @param speed 速率取值 2400,4800,9600,115200

* @param stopBit 停止位取值1或者 2

publicint configDevice(int databits,char event,int speed,int stopBit){

if(!mIsOpen){

return -1;

}

int re =mTtyControl.configTty(databits, event, speed, stopBit);

return re;

}

/**

* 设置串口通信模式，打印串口信息

* @param mode是否使用原始模式(Raw Mode)方式来通讯取值0,1,2 说明：0=nothing,1=Raw mode,2=no raw mode

* @param showLog打印出串口信息Log 取值1,0

* @return

publicint setMode(int mode ,int showLog){

returnmTtyControl.setMode(mode, showLog);

}

/**

* 接收数据回调接口，接收驱动送到的数据要实现这个回调接口

publicinterface ReceiveDataCallBackextends ReceiveCallback{

}

5. JAVA调用 Activity

package com.notioni.uart;

import com.notioni.uart.manager.TtyNativeControl;

import com.notioni.uart.manager.UARTCTLManager;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.util.Log;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

publicclass UARTCTLActivityextends Activityimplements View.OnClickListener{

privatestaticfinal StringTAG ="UARTCTLActivity";

private UARTCTLManagermUartctlManager;

private ButtonmOpenOrCloseBtn;

private ButtonmSendBtn;

private EditTextmSendText;

private TextViewmReceiveText;

private ReceiveDatamReceiveData;

/** Called when the activity is first created. */

@Override

publicvoid onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

mUartctlManager = UARTCTLManager.getInstance();

mReceiveData =new ReceiveData();

mOpenOrCloseBtn = (Button)findViewById(R.id.openOrcloseBtn);

mSendBtn = (Button)findViewById(R.id.sendBtn);

mSendText = (EditText)findViewById(R.id.sendMsg);

mReceiveText = (TextView)findViewById(R.id.receiveMsg);

mOpenOrCloseBtn.setOnClickListener(this);

mSendBtn.setOnClickListener(this);

}

@Override

protectedvoid onResume() {

super.onResume();

}

@Override

publicvoid onClick(View v) {

switch(v.getId()){

case R.id.openOrcloseBtn://打开或关闭驱动

Log.i(TAG,"isOpen:"+mUartctlManager.isOpenDevice());

if(mUartctlManager.isOpenDevice()){

mUartctlManager.closeDevice();

mOpenOrCloseBtn.setText(R.string.open);

}else{

int i =mUartctlManager.openDevice();

Log.i(TAG,"openDevice result:"+i);

mOpenOrCloseBtn.setText(R.string.close);

mUartctlManager.setMode(1, 1);//查看串口配置信息

}

break;

case R.id.sendBtn:

openDevice();

int re =mUartctlManager.sendDataToDevice(getSendText());

Log.i(TAG,"send result:"+re);

break;

}

* 打开驱动

privatevoid openDevice(){

if(!mUartctlManager.isOpenDevice()){

mUartctlManager.openDevice();

mUartctlManager.receiveDataFromDevice(mReceiveData);

}

* 关闭驱动

publicvoid closeDevice(){

if(mUartctlManager.isOpenDevice()){

mUartctlManager.closeDevice();

}

* 取出待发送的数据

privatebyte[] getSendText(){

String st = mSendText.getText().toString()+"\r";

if(st ==null ||"".equals(st)){

returnnull;

}

return st.getBytes();

}

* 接收数据

class ReceiveDataimplements UARTCTLManager.ReceiveDataCallBack{

@Override

publicvoid onReceiveData(byte[] data, TtyNativeControl tty) {

if(mReceiveText != null && data !=null){

Log.w(TAG,"[onReceiveData] data:"+data.toString());

mReceiveText.setText(data.toString());

}

@Override

publicboolean onCreateOptionsMenu(Menu menu) {

menu.add(1,1,0,R.string.config);

returnsuper.onCreateOptionsMenu(menu);

}

@Override

publicboolean onOptionsItemSelected(MenuItem item) {

super.onOptionsItemSelected(item);

if(item.getItemId() == 1){

Intent intent = new Intent();

intent.setClass(this, ConfigActivity.class);

startActivity(intent);

}

returntrue;

}

@Override

protectedvoid onPause() {

super.onPause();

// closeDevice();

}

@Override

protectedvoid onDestroy() {

closeDevice();

super.onDestroy();

}

6. JAVA配置串口属性

package com.notioni.uart;

import com.notioni.uart.manager.UARTCTLManager;

import android.os.Bundle;

import android.preference.ListPreference;

import android.preference.Preference;

import android.preference.PreferenceActivity;

import android.preference.PreferenceScreen;

import android.util.Log;

import android.widget.Toast;

publicclass ConfigActivityextends PreferenceActivityimplements Preference.OnPreferenceChangeListener{

privatestaticfinal StringTAG ="ConfigActivity";

privatestaticfinal StringKEY_DATABITS ="tty_databits";

privatestaticfinal StringKEY_EVENT ="tty_event";

privatestaticfinal StringKEY_SPEED ="tty_speed";

privatestaticfinal StringKEY_STOPBITS ="tty_stopbits";

ListPreference dataBitsPrefer ;

ListPreference eventPrefer ;

ListPreference speedPrefer ;

ListPreference stopBitsPrefer ;

Object dataBitsValues =null;

Object eventValues =null;

Object speedValues =null;

Object stopbitsValues =null;

@Override

protectedvoid onCreate(Bundle savedInstanceState) {

//TODO Auto-generated method stub

super.onCreate(savedInstanceState);

addPreferencesFromResource(R.xml.config_options);

PreferenceScreen prefSet = getPreferenceScreen();

dataBitsPrefer = (ListPreference)prefSet.findPreference(KEY_DATABITS);

eventPrefer = (ListPreference)prefSet.findPreference(KEY_EVENT);

speedPrefer = (ListPreference)prefSet.findPreference(KEY_SPEED);

stopBitsPrefer = (ListPreference)prefSet.findPreference(KEY_STOPBITS);

dataBitsPrefer.setValueIndex(0);

eventPrefer.setValueIndex(0);

speedPrefer.setValueIndex(0);

stopBitsPrefer.setValueIndex(0);

dataBitsPrefer.setOnPreferenceChangeListener(this);

eventPrefer.setOnPreferenceChangeListener(this);

speedPrefer.setOnPreferenceChangeListener(this);

stopBitsPrefer.setOnPreferenceChangeListener(this);

}

@Override

publicboolean onPreferenceChange(Preference preference, Object newValue) {

if(preference ==dataBitsPrefer){

dataBitsValues = newValue;

}elseif(preference ==eventPrefer){

eventValues = newValue;

}elseif(preference ==speedPrefer){

speedValues = newValue;

}elseif(preference ==stopBitsPrefer){

stopbitsValues = newValue;

}

Log.i(TAG,"newValue:"+newValue);

returnfalse;

}

@Override

protectedvoid onPause() {

super.onPause();

UARTCTLManager mUartctlManager = UARTCTLManager.getInstance();

int databits=7,speed=9600,stopbits=1;//设置默认值

char event='N';//设置默认值

if(dataBitsValues != null){

databits = Integer.parseInt(dataBitsValues.toString());

}

if(eventValues != null){

event = eventValues.toString().charAt(0);

}

if(speedValues != null){

speed = Integer.parseInt(speedValues.toString());

}

if(stopbitsValues != null){

stopbits = Integer.parseInt(stopbitsValues.toString());

}

if(!mUartctlManager.isOpenDevice()){

mUartctlManager.openDevice();

}

Log.e(TAG,"databit="+databits+",event="+event+",speed="+speed+",stopbits="+stopbits);

if(databits == -1 || speed == -1 || stopbits == -1 || event=='Q'){

Toast.makeText(this,"有参数没有设置，不去配置串口!", Toast.LENGTH_LONG).show();

return;

}

mUartctlManager.configDevice(databits, event, speed, stopbits);

mUartctlManager.setMode(0, 1);//查看串口配置信息

// Log.e(TAG, "databit="+databits+",event="+event+",speed="+speed+",stopbits="+stopbits);

}

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