android wifi接收数据库,Android客户端通过WiFi从TCP服务器(ESP8266-12E)接收数据

悠悠 2022-10-14 01:17 85阅读 0赞

目标简介：

1)启动ESP8266 Wifi模块作为侦听特定端口的TCP服务器 - >到目前为止完成

2)从服务器发送int或String到Client

2)编写一个作为客户端的Android应用程序(Android Studios)，连接到服务器并接收发送的数据。

问题：

1)我的客户端应用程序没有收到任何数据

2)我也无法从我的MainActivity类访问消息以显示它在TextView中，变量处于Try，Catch Block中。

Android Studio

客户代码：

package com.example.petarmaric.client;

import android.util.Log;

import java.io.BufferedReader;

import java.io.DataInputStream;

import java.io.InputStreamReader;

import java.net.InetAddress;

import java.net.Socket;

/\*\*

\* Created by petarmaric on 04/02/2017.

\*/

public class TCP\_Client \{

// Variables and Constants

public static final String SERVERIP = "192.168.1.2";

public static final int SERVERPORT = 3030;

DataInputStream in;

Integer serverMessage;

// Run the Client

public void run()\{

try \{

InetAddress serverAddress = InetAddress.getByName(SERVERIP);

Log.e("Connection", "connecting to server...");

//Create the Socket

Socket socket = new Socket(serverAddress, SERVERPORT);

Log.e("Socket", "Socket was created");

try \{

//receive the message from the Server

//in = new BufferedReader(new InputStreamReader(socket.getInputStream()));

in = new DataInputStream(socket.getInputStream());

Log.e("InputStream","DataInputStream created");

serverMessage = in.read();

Log.e("Message from Server", "Maybe");

\} catch (Exception e) \{

Log.e("InputERROR", "Nachricht wurde nicht empfangen");

\} finally \{

socket.close();

Log.e("Socket","Socket was closed");

\}catch (Exception e)\{

Log.e("ConnectionERROR","Nicht connected");

Log.e("End","End of Run Method");

\}应用程序启动后的Logcat：

Markdown and HTML are turned off in code blocks:

*This is not italic*, and this is not a link

02-04 18:36:17.475 25858-25858/com.example.petarmaric.client W/System: ClassLoader referenced unknown path: /data/app/com.example.petarmaric.client-2/lib/x86\_64

02-04 18:36:17.788 25858-25858/com.example.petarmaric.client W/System: ClassLoader referenced unknown path: /data/app/com.example.petarmaric.client-2/lib/x86\_64

02-04 18:36:18.157 25858-25858/com.example.petarmaric.client W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable

02-04 18:36:18.213 25858-25895/com.example.petarmaric.client E/Connection: connecting to server...

02-04 18:36:18.217 25858-25896/com.example.petarmaric.client D/OpenGLRenderer: Use EGL\_SWAP\_BEHAVIOR\_PRESERVED: true

\[ 02-04 18:36:18.219 25858:25858 D/ \]

HostConnection::get() New Host Connection established 0x7fa68eb72bc0, tid 25858

\[ 02-04 18:36:18.278 25858:25896 D/ \]

HostConnection::get() New Host Connection established 0x7fa68eb72e80, tid 25896

02-04 18:36:18.295 25858-25896/com.example.petarmaric.client I/OpenGLRenderer: Initialized EGL, version 1.4

02-04 18:36:18.367 25858-25895/com.example.petarmaric.client E/Socket: Socket was created

02-04 18:36:18.367 25858-25895/com.example.petarmaric.client E/InputStream: DataInputStream createdMainAcitvity代码：

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*This is not italic*, and this is not a link

package com.example.petarmaric.client;

import android.os.AsyncTask;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.util.Log;

public class MainActivity extends AppCompatActivity \{

//Declaration of Client object

private TCP\_Client mTcpClient;

@Override

protected void onCreate(Bundle savedInstanceState) \{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity\_main);

//Connect to the Server

new ConnectTask().execute("");

//ConnectClass definition

public class ConnectTask extends AsyncTask

@Override

protected TCP\_Client doInBackground(Object\[\] params) \{

//We create the TCP client object and run the Task

mTcpClient = new TCP\_Client();

mTcpClient.run();

Log.e("Main Thread", "Client run initiated");

return null;

\}Arduino IDE

ESP8266 12-E(Wifi模块代码)：

\#include

// declare the Variables

char\* ssid = "NETGEAR54";

char\* password = "calmpiano742";

char thisChar;

//create wifi server listen on a given port

WiFiServer server(3030);

//create Wifi client

WiFiClient client;

void setup() \{

//Connnect to WiFi Network

Serial.begin(115200);

WiFi.begin(ssid,password);

Serial.println("");

//Wait for connection

while (WiFi.status()!=WL\_CONNECTED)

delay(500);

Serial.print(".");

//Print status to Serial Monitor

Serial.print("connected to: "); Serial.println(ssid);

Serial.print("IP Address: "); Serial.println(WiFi.localIP());

//Start the TCP server

server.begin();

void loop() \{

client = server.available();

if(client)\{

if(client.connected())\{

Serial.println("connected to client");

while(client.connected())\{

server.write(1);

\}串行监视器：

1384, room 16

tail 8

chksum ��

......connected to: NETGEAR54

IP Address: 192.168.1.2

connected to client

.....................................................................

Soft WDT reset

ctx: cont

sp: 3ffef2c0 end: 3ffef4f0 offset: 01b0

>>>stack>>>

3ffef470: 3ffe8644 3ffee49c 3ffee49c 40202d25

3ffef480: 3ffe8444 00000002 3ffe84ff 40203380

3ffef490: 00000001 3ffee388 3ffee49c 3ffee4c8

3ffef4a0: 3ffee388 3ffee49c 3ffee370 40201d40

3ffef4b0: 3ffe8480 00000000 000003e8 40201c89

3ffef4c0: 00000000 3fff0424 00000001 40202fc9

3ffef4d0: 3fffdad0 00000000 3ffee4c0 40202ff4

3ffef4e0: feefeffe feefeffe 3ffee4d0 40100718

ets Jan 8 2013,rst cause:2, boot mode:(1,7)如果您需要更多信息，请提前感谢您的帮助，请在下面写下您的问题。

android wifi接收数据库,Android客户端通过WiFi从TCP服务器(ESP8266-12E)接收数据

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