体育课程网站建设,wordpress umeditor,广州番禺区是富人区吗,wordpress后台的使用技巧今天做一个android与pc通信的小demo#xff08;不是wifi#xff0c;蓝牙#xff09;android为客户端#xff0c;pc为服务器#xff08;一对多#xff09;。pc代码很简单#xff0c;android客户端代码也不难#xff0c;但是有一点不太明白就是在客户端向服务器发送消息时…今天做一个android与pc通信的小demo不是wifi蓝牙android为客户端pc为服务器一对多。pc代码很简单android客户端代码也不难但是有一点不太明白就是在客户端向服务器发送消息时要用
writer new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())),true);
用writer new PrintWriter(socket.getOutputStream(), true)这句服务器接收不到消息
BufferedWriter主要提供了字符输出的缓冲功能提高了字符输出的效率。
OutputStreamWriter则是一个字符输出流到字节输出流的桥梁负责字符编码的转换。主要作用 是将字符编码转换为字节编码以便能够输出到各种设备或文件中。
OutputStream是更底层的字节输出流不涉及字符编码的转换
先记录一下以备后用
以下代码为自己实验备份可以用测试过的但很不严谨
public class MainActivity extends Activity implements OnClickListener { public TextView textView; public Socket socket; public PrintWriter writer; private Button btn; private EditText editText; public static final int UPDATE_TEXT1; Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); textView (TextView) findViewById(R.id.text_view); btn(Button)findViewById(R.id.button); editText(EditText)findViewById(R.id.edit_text); btn.setOnClickListener(this); //new ConnectTask().execute(); new Thread(new Runnable() { //PrintWriter out; Override public void run() { try { socket new Socket(192.168.1.3, 1982); Log.d(MainActivity, 网络初始化成功); writer new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())),true); BufferedReader in new BufferedReader(new InputStreamReader(socket.getInputStream())); // writer.println(wochaolezhangyuhui); } catch (UnknownHostException e) { e.printStackTrace(); Log.d(MainActivity, 未知主机地址); } catch (IOException e) { e.printStackTrace(); Log.d(MainActivity, 输入输出异常); } } }).start(); } Override public void onClick(View v) { // TODO Auto-generated method stub switch(v.getId()){ case R.id.button: String streditText.getText().toString(); writer.println(str); } }
/*class ConnectTask extends AsyncTaskVoid, Void, Void { private Socket socket; PrintWriter out; Override protected Void doInBackground(Void... params) { try { socket new Socket(192.168.1.3, 1982); // 替换为PC的IP地址 //out new PrintWriter(socket.getOutputStream()); out new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())),true); BufferedReader in new BufferedReader(new InputStreamReader(socket.getInputStream())); out.write(wochaolezhangyuhui); btn.setOnClickListener(new OnClickListener(){ Override public void onClick(View v) { // TODO Auto-generated method stub //String streditText.getText(); out.write(wochaolezhangyuhui); }}); //in.close(); out.close(); socket.close(); } catch (IOException e) { e.printStackTrace(); } return null; } } */ }
