Mini2440Activity.java

package sg131971.mini2440;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Handler;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;
public class Mini2440Activity extends Activity {
private static int Connect_flag = 0;
private static int AutoRefresh_flag = 0;
private static int LED_flag[] = new int[4];
private Bitmap m_Bitmap;
private ImageView myImageView;
private Handler m_Handler = new Handler();
private String Board_IP;
private EditText myEditText;
private Button myButtonConnect;
private Button myButton0;
private Button myButton1;
private Button myButton2;
private Button myButton3;
private Button myButtonStatus;
private Button autoButton;
private Button manualButton;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
myEditText = (EditText) findViewById(R.id.editText);
myButtonConnect = (Button) findViewById(R.id.myButtonConnect);
myButtonConnect.setOnClickListener(new ConnectListener());
myImageView = (ImageView) findViewById(R.id.imageView);
autoButton = (Button) findViewById(R.id.autoButton);
manualButton = (Button) findViewById(R.id.manualButton);
myButton0 = (Button) findViewById(R.id.myButton0);
myButton1 = (Button) findViewById(R.id.myButton1);
myButton2 = (Button) findViewById(R.id.myButton2);
myButton3 = (Button) findViewById(R.id.myButton3);
myButtonStatus = (Button) findViewById(R.id.myButtonStatus);
StopService();
}
public boolean onKeyDown(int keyCode, KeyEvent msg) {
if (keyCode == KeyEvent.KEYCODE_BACK)
{
finish();
System.exit(0);
}
return false;
}
private void StartService() {
// TODO Auto-generated method stub
m_Handler.postDelayed(m_RefreshImage, 0);
myButton0.setOnClickListener(new LED0Listener());
myButton1.setOnClickListener(new LED1Listener());
myButton2.setOnClickListener(new LED2Listener());
myButton3.setOnClickListener(new LED3Listener());
myButtonStatus.setOnClickListener(new StatusListener());
autoButton.setOnClickListener(new AutoRefresh());
manualButton.setOnClickListener(new ManualRefresh());
}
private void StopService() {
// TODO Auto-generated method stub
m_Handler.removeCallbacks(m_RefreshImage);
myImageView.setImageResource(R.drawable.first);
myButton0.setOnClickListener(new DefaultListener());
myButton1.setOnClickListener(new DefaultListener());
myButton2.setOnClickListener(new DefaultListener());
myButton3.setOnClickListener(new DefaultListener());
myButtonStatus.setOnClickListener(new DefaultListener());
autoButton.setOnClickListener(new DefaultListener());
manualButton.setOnClickListener(new DefaultListener());
}
public class ConnectListener implements OnClickListener {
public void onClick(View v) {
// TODO Auto-generated method stub
Board_IP = myEditText.getText().toString();
if (Connect_flag == 0) {
Connect_flag = 1;
StartService();
myButtonConnect.setText("Disconnect");
showMessage("已连接：" + Board_IP);
} else {
Connect_flag = 0;
AutoRefresh_flag = 0;
StopService();
myButtonConnect.setText("Connect");
showMessage("已断开：" + Board_IP);
}
}
}
public class DefaultListener implements OnClickListener {
public void onClick(View v) {
// TODO Auto-generated method stub
showMessage("请先连接ARM板！");
}
}
public class ManualRefresh implements OnClickListener {
public void onClick(View v) {
// TODO Auto-generated method stub
if (AutoRefresh_flag == 1)
AutoRefresh_flag = 0;
m_Handler.postDelayed(m_RefreshImage, 0);
showMessage("手动刷新成功！");
}
}
public class AutoRefresh implements OnClickListener {
public void onClick(View v) {
// TODO Auto-generated method stub
if (AutoRefresh_flag == 0)
AutoRefresh_flag = 1;
m_Handler.postDelayed(m_RefreshImage, 0);
showMessage("自动刷新设置成功！");
}
}
private Runnable m_RefreshImage = new Runnable() {
public void run() {
// TODO Auto-generated method stub
RefreshImage();
if (AutoRefresh_flag == 1)
m_Handler.postDelayed(m_RefreshImage, 100);
else
m_Handler.removeCallbacks(m_RefreshImage);
}
private void RefreshImage() {
// TODO Auto-generated method stub
try {
URL m_URL = new URL("http://" + Board_IP
+ ":8080/?action=snapshot");
URLConnection m_URL_Connection = m_URL.openConnection();
m_URL_Connection.connect();
InputStream m_InputStream = m_URL_Connection.getInputStream();
m_Bitmap = BitmapFactory.decodeStream(m_InputStream);
myImageView.setImageBitmap(m_Bitmap);
m_InputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
};
public class LED0Listener implements OnClickListener {
public void onClick(View arg0) {
// TODO Auto-generated method stub
LED_flag[0]++;
if (LED_flag[0] % 2 == 1) {
HttpSendCmd("58400F01");
showMessage("LED0已打开！");
} else {
HttpSendCmd("58400F00");
showMessage("LED0已关闭！");
}
}
}
public class LED1Listener implements OnClickListener {
public void onClick(View v) {
// TODO Auto-generated method stub
LED_flag[1]++;
if (LED_flag[1] % 2 == 1) {
HttpSendCmd("58401F01");
showMessage("LED1已打开！");
} else {
HttpSendCmd("58401F00");
showMessage("LED1已关闭！");
}
}
}
public class LED2Listener implements OnClickListener {
public void onClick(View v) {
// TODO Auto-generated method stub
LED_flag[2]++;
if (LED_flag[2] % 2 == 1) {
HttpSendCmd("58402F01");
showMessage("LED2已打开！");
} else {
HttpSendCmd("58402F00");
showMessage("LED2已关闭！");
}
}
}
public class LED3Listener implements OnClickListener {
public void onClick(View v) {
// TODO Auto-generated method stub
LED_flag[3]++;
if (LED_flag[3] % 2 == 1) {
HttpSendCmd("58403F01");
showMessage("LED3已打开！");
} else {
HttpSendCmd("58403F00");
showMessage("LED3已关闭！");
}
}
}
public class StatusListener implements OnClickListener {
public void onClick(View v) {
// TODO Auto-generated method stub
String display_info = "";
// 以后此处可以通过发送http请求查询硬件状态
HttpSendCmd("5840FFFF");
if (LED_flag[0] % 2 == 1)
display_info += "LED0:开";
else
display_info += "LED0:关";
display_info += "
";
if (LED_flag[1] % 2 == 1)
display_info += "LED1:开";
else
display_info += "LED1:关";
display_info += "
";
if (LED_flag[2] % 2 == 1)
display_info += "LED2:开";
else
display_info += "LED2:关";
display_info += "
";
if (LED_flag[3] % 2 == 1)
display_info += "LED3:开";
else
display_info += "LED3:关";
showMessage(display_info);
}
}
public void HttpSendCmd(String cmd) {
// TODO Auto-generated method stub
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://" + Board_IP
+ "/mjpg-streamer/post_data.php");
try {
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(3);
nameValuePairs.add(new BasicNameValuePair("user", "root"));
nameValuePairs.add(new BasicNameValuePair("passwd", "shiguang"));
nameValuePairs.add(new BasicNameValuePair("para", cmd));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
String tmpString = EntityUtils.toString(response.getEntity());
System.out.println(tmpString);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void showMessage(String str) {
Toast toast = Toast.makeText(this, str, Toast.LENGTH_SHORT);
toast.setGravity(Gravity.TOP, 0, 550);
toast.show();
}
}

最终效果图：

/nfsroot/rootfs/usr/local/apache_arm/htdocs/mjpg-streamer/post_data.php

<?php
@header("content-type:text/html; charset=utf-8");
error_reporting(E_ALL);
set_time_limit(0);
$user = $_REQUEST['user'];
$passed = $_REQUEST['passwd'];
$para = $_REQUEST['para'];
$service_port = 9090;
$address = "192.168.1.97";
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket < 0)
{
echo "socket_create() failed: reason: " . socket_strerror($socket) . "n";
}
$result = socket_connect($socket, $address, $service_port);
if ($result < 0)
{
echo "socket_connect()
failed: reason: " . socket_strerror($result) . "n";
}
$in = $user . $passed . $para;
$result = socket_write($socket, $in, strlen($in)) ;
if(!$result)
{
echo "socket_write() failed: reason: " . socket_strerror($socket) . "n";
}
/*
while($out = socket_read($socket,256))
{
echo $out;
break;
}
*/
socket_close($socket);
?>

OK!

现在，基本通路已经打通，剩下的就是简单的指令转换和设备控制了！