tcp;Android app 和PC服务器端
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2022-07-04 16:41:45
AndroidManifest.xml ...
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.myapplication2">
<uses-permission android:name="android.permission.INTERNET"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
package com.example.myapplication2;
import android.annotation.SuppressLint;
import android.os.Handler;
import android.os.Message;
//import android.support.v7.app.AppCompatActivity;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.text.method.ScrollingMovementMethod;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private Button bt_conn, bt_send, bt_clear;
private EditText et_ip, et_port, et_msg;
private TextView tv_data;
TCPClient tcpClient;
Message message;
@SuppressLint("HandlerLeak")
Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case 1:
tv_data.append("接收消息:" + msg.obj.toString() + "\n");
break;
case 2:
tv_data.append("发送消息:" + msg.obj.toString() + "\n");
break;
case 3:
Toast.makeText(MainActivity.this, "TCP连接成功!", Toast.LENGTH_SHORT).show();
bt_send.setEnabled(true);
break;
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
Clickbt();
tcpClient = new TCPClient(handler);
}
private void Clickbt() {
bt_conn.setOnClickListener(this);
bt_send.setOnClickListener(this);
bt_clear.setOnClickListener(this);
}
private void initView() {
bt_conn = findViewById(R.id.bt_conn);
bt_send = findViewById(R.id.bt_send);
bt_send.setEnabled(false);
bt_clear = findViewById(R.id.bt_clear);
et_ip = findViewById(R.id.et_ip);
et_port = findViewById(R.id.et_port);
et_msg = findViewById(R.id.et_msg);
tv_data = findViewById(R.id.tv_data);
tv_data.setMovementMethod(ScrollingMovementMethod.getInstance());
}
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.bt_conn:
new Thread(new Runnable() {
@Override
public void run() {
try {
tcpClient.conntcp(et_ip.getText().toString(), Integer.parseInt(et_port.getText().toString()));
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
break;
case R.id.bt_send:
tcpClient.send(et_msg.getText().toString());
break;
case R.id.bt_clear:
tv_data.setText("");
break;
}
}
}
MainActivity.java
TCPClient.java
package com.example.myapplication2;
import android.os.Handler;
import android.os.Message;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
public class TCPClient {
Socket socket;
InputStream inputStream;
OutputStream outputStream;
Message message;
Handler handler;
public TCPClient(Handler handler) {
this.handler = handler;
}
public void conntcp(String ip, int port) throws IOException {
socket = new Socket(ip, port);
inputStream = socket.getInputStream();
outputStream = socket.getOutputStream();
message = new Message();
message.what = 3;//连接成功
handler.sendMessage(message);
accept();
}
private void accept() throws IOException {
while (true) {
byte[] byte1 = new byte[1024];
int i = inputStream.read(byte1);
byte[] byte2 = new byte[i];
System.arraycopy(byte1, 0, byte2, 0, i);
String s = new String(byte2, "UTF-8");
message = new Message();
message.what = 1;//接收
message.obj = s;
handler.sendMessage(message);
}
}
public void send(final String s) {
new Thread(new Runnable() {
@Override
public void run() {
try {
String ss = s + "\n";
byte[] bytes = ss.getBytes();
outputStream.flush();
outputStream.write(bytes);
message = new Message();
message.what = 2;//发送
message.obj = s;
handler.sendMessage(message);
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<Button
android:id="@+id/bt_send"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="78dp"
android:layout_marginTop="162dp"
android:text="@string/send"
app:layout_constraintStart_toEndOf="@+id/bt_conn"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/bt_conn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="24dp"
android:layout_marginTop="28dp"
android:text="@string/conn"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/et_port" />
<EditText
android:id="@+id/et_ip"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="25dp"
android:layout_marginTop="42dp"
android:ems="10"
android:inputType="textPersonName"
android:text="@string/_127_0_0_1"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="@+id/et_port"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="26dp"
android:layout_marginTop="10dp"
android:ems="10"
android:inputType="textPersonName"
android:text="@string/_8080"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/et_ip" />
<EditText
android:id="@+id/et_msg"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="20dp"
android:layout_marginTop="53dp"
android:ems="10"
android:inputType="textPersonName"
android:text="test data android"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/bt_send" />
<TextView
android:id="@+id/tv_data"
android:layout_width="273dp"
android:layout_height="203dp"
android:layout_marginStart="41dp"
android:layout_marginTop="34dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/et_msg" />
<Button
android:id="@+id/bt_clear"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="133dp"
android:layout_marginBottom="31dp"
android:text="@string/clear"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
String.xml
<resources>
<string name="app_name">My Application2</string>
<string name="send">send</string>
<string name="conn">conn</string>
<string name="_127_0_0_1">http://127.0.0.1</string>
<string name="_8080">8080</string>
<string name="clear">清屏</string>
</resources>
其他均保持默认数据即可
增加build.gradle配置
apply plugin: 'com.android.application'
android {
compileSdkVersion 30
buildToolsVersion "30.0.2"
defaultConfig {
applicationId "com.example.myapplication2"
minSdkVersion 19
targetSdkVersion 30
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: "libs", include: ["*.jar"])
implementation 'androidx.appcompat:appcompat:1.2.0'
implementation 'androidx.constraintlayout:constraintlayout:2.0.1'
//noinspection GradleCompatible
implementation 'com.android.support:appcompat-v7:28.0.0'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test.ext:junit:1.1.2'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
}
本文地址:https://blog.csdn.net/Llingmiao/article/details/108736967
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