LocalSocket,在Unix域名空间创建的一个套接字（非服务端）。
是对Linux中Socket进行了封装，采用JNI方式调用，实现进程间通信。
具体就是Native层Server和Framework层Client之间进行通信，或在各层次中能使用Client/Server模式实现通信。
在这里通过LocalSocket实现应用之间的通信，可以接收、发送数据，同时将接收到的数据通过activty显示。
Server端：
package com.example.driverexam; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import android.net.Credentials; import android.net.LocalServerSocket; import android.net.LocalSocket; import android.os.Handler; import android.os.Message; import android.util.Log; /** * 通过LocalSocket实现 * @author Administrator * */ public class ServerFinally implements Runnable{ private static final String TAG="ServerFinally"; LocalServerSocket server; LocalSocket client; PrintWriter os; BufferedReader is; Handler handler; /** * 此处不将连接代码写在构造方法中的原因： * 我在activity的onCreate()中创建示例，如果将连接代码 写在构造方法中，服务端会一直等待客户端连接，界面没有去描绘，会一直出现白屏。 * 直到客户端连接上了，界面才会描绘出来。原因是构造方法阻塞了主线程，要另开一个线程。在这里我将它写在了run()中。 */ ServerFinally(Handler handler){ this.handler=handler; // try { // Log.i(TAG, "Server=======打开服务========="); // server=new LocalServerSocket("com.repackaging.localsocket"); // client=server.accept(); // Log.i(TAG, "Server=======客户端连接成功========="); // Credentials cre=client.getPeerCredentials(); // Log.i(TAG, "===客户端ID为:"+cre.getUid()); // os=new PrintWriter(client.getOutputStream()); // is=new BufferedReader(new InputStreamReader(client.getInputStream())); // } catch (IOException e) { // // TODO Auto-generated catch block // e.printStackTrace(); // } } //发数据 public void send(String data){ if (os!=null) { os.println(data); os.flush(); } } //接数据 @Override public void run() { Log.i(TAG, "Server=======打开服务========="); try { server=new LocalServerSocket("com.repackaging.localsocket"); client=server.accept(); Log.i(TAG, "Server=======客户端连接成功========="); Credentials cre=client.getPeerCredentials(); Log.i(TAG, "===客户端ID为:"+cre.getUid()); os=new PrintWriter(client.getOutputStream()); is=new BufferedReader(new InputStreamReader(client.getInputStream())); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } String result=""; while(true){ try { result=is.readLine(); Log.i(TAG, "服务端接到的数据为："+result); //把数据带回activity显示 Message msg=handler.obtainMessage(); msg.obj=result; msg.arg1=0x11; handler.sendMessage(msg); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } public void close(){ try { if (os!=null) { os.close(); } if (is!=null) { is.close(); } if(client!=null){ client.close(); } if (server!=null) { server.close(); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }
ServerFinallyActivity.java
package com.example.driverexam; import android.app.Activity; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.view.View; import android.widget.EditText; import android.widget.TextView; public class ServerFinallyActivity extends Activity { EditText et_serverSend; TextView tv_showReceiveData; ServerFinally server; // ServerLastly server; StringBuffer receiveData=new StringBuffer(); Handler handler=new Handler(new Handler.Callback() { @Override public boolean handleMessage(Message msg) { if (msg.arg1==0x11) { receiveData.append((String)msg.obj); tv_showReceiveData.setText(receiveData); receiveData.append("\r\n"); } return false; } }); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_server_finally); et_serverSend=(EditText) findViewById(R.id.et_serverSend); tv_showReceiveData=(TextView) findViewById(R.id.tv_showReceiveData); server=new ServerFinally(handler); new Thread(server).start(); // server=new ServerLastly(handler); // new Thread(server).start(); } //发数据 public void btn_serverSend(View view){ server.send(et_serverSend.getText().toString()+""); et_serverSend.setText(""); } @Override protected void onDestroy() { super.onDestroy(); server.close(); } }
Client端：
ClientFinally.java
package com.fqhx.remoteserviceclient; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import android.net.LocalSocket; import android.net.LocalSocketAddress; import android.os.Handler; import android.os.Message; import android.util.Log; /** * 通过LocalSocket实现 * @author Administrator * */ public class ClientFinally implements Runnable{ private static final String TAG="ClientFinally"; private static final String NAME="com.repackaging.localsocket"; private int timeout=30000; LocalSocket client; PrintWriter os; BufferedReader is; Handler handler; ClientFinally(Handler handler){ this.handler=handler; // client=new LocalSocket(); // try { // client.connect(new LocalSocketAddress(NAME));//连接服务器 // Log.i(TAG, "Client=======连接服务器成功========="); // client.setSoTimeout(timeout); // os=new PrintWriter(client.getOutputStream()); // is=new BufferedReader(new InputStreamReader(client.getInputStream())); // } catch (IOException e) { // // TODO Auto-generated catch block // e.printStackTrace(); // } } //发数据 public void send(String data){ if (os!=null) { os.println(data); os.flush(); } } @Override public void run() { client=new LocalSocket(); try { client.connect(new LocalSocketAddress(NAME));//连接服务器 Log.i(TAG, "Client=======连接服务器成功========="); client.setSoTimeout(timeout); os=new PrintWriter(client.getOutputStream()); is=new BufferedReader(new InputStreamReader(client.getInputStream())); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } String result=""; while(true){ try { result=is.readLine(); Log.i(TAG, "客户端接到的数据为："+result); //将数据带回acitvity显示 Message msg=handler.obtainMessage(); msg.arg1=0x12; msg.obj=result; handler.sendMessage(msg); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } public void close(){ try { if (os!=null) { os.close(); } if (is!=null) { is.close(); } if(client!=null){ client.close(); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }
ClientFinallyActivity.java
package com.fqhx.remoteserviceclient; import android.app.Activity; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.view.View; import android.widget.EditText; import android.widget.TextView; public class ClientFinallyActivity extends Activity { ClientFinally client; EditText et_clientSend; TextView tv_showReceiveDataClient; // ClientLastly client; StringBuffer receiveData=new StringBuffer(); Handler handler=new Handler(new Handler.Callback() { @Override public boolean handleMessage(Message msg) { if (msg.arg1==0x12) { receiveData.append((String)msg.obj); tv_showReceiveDataClient.setText(receiveData); receiveData.append("\r\n"); } return false; } }); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_client_finally); et_clientSend=(EditText) findViewById(R.id.et_clientSend); tv_showReceiveDataClient=(TextView) findViewById(R.id.tv_showReceiveDataClient); client=new ClientFinally(handler); new Thread(client).start(); // client=new ClientLastly(handler); // new Thread(client).start(); } public void btn_clientSend(View view){ client.send(et_clientSend.getText().toString()+""); et_clientSend.setText(""); } @Override protected void onDestroy() { super.onDestroy(); client.close(); } }