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   源码介绍

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客户端代码：

package com.example.sockettest;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.os.RemoteException;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
	private static final String TAG = "MainActivity";

	private Intent mServiceIntent;
	private IBackService iBackService;
	private TextView tv;
	private EditText et;
	private Button btn;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		initViews();
		initData();
	}

	private void initViews() {
		tv = (TextView) findViewById(R.id.tv);
		et = (EditText) findViewById(R.id.editText1);
		btn = (Button) findViewById(R.id.button1);
	}

	private void initData() {
		mServiceIntent = new Intent(this, BackService.class);
		btn.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				String string = et.getText().toString().trim();
				Log.i(TAG, string);
				try {
					Log.i(TAG, "是否为空："   iBackService);
					if (iBackService == null) {
						Toast.makeText(getApplicationContext(),
								"没有连接，可能是服务器已断开", Toast.LENGTH_SHORT).show();
					} else {
						boolean isSend = iBackService.sendMessage(string);
						Toast.makeText(MainActivity.this,
								isSend ? "success" : "fail", Toast.LENGTH_SHORT)
								.show();
						et.setText("");
					}
				} catch (RemoteException e) {
					e.printStackTrace();
				}
			}
		});
	}

	@Override
	protected void onStart() {
		super.onStart();
		bindService(mServiceIntent, conn, BIND_AUTO_CREATE);
		// 开始服务
		registerReceiver();
	}

	@Override
	protected void onResume() {
		super.onResume();
		// 注册广播 最好在onResume中注册
		// registerReceiver();
	}

	@Override
	protected void onPause() {
		super.onPause();
		// 注销广播 最好在onPause上注销
		unregisterReceiver(mReceiver);
		// 注销服务
		unbindService(conn);
	}

	// 注册广播
	private void registerReceiver() {
		IntentFilter intentFilter = new IntentFilter();
		intentFilter.addAction(BackService.HEART_BEAT_ACTION);
		intentFilter.addAction(BackService.MESSAGE_ACTION);
		registerReceiver(mReceiver, intentFilter);
	}

	private BroadcastReceiver mReceiver = new BroadcastReceiver() {
		@Override
		public void onReceive(Context context, Intent intent) {
			String action = intent.getAction();
			// 消息广播
			if (action.equals(BackService.MESSAGE_ACTION)) {
				String stringExtra = intent.getStringExtra("message");
				tv.setText(stringExtra);
			} else if (action.equals(BackService.HEART_BEAT_ACTION)) {// 心跳广播
				tv.setText("正常心跳");
			}
		}
	};

	private ServiceConnection conn = new ServiceConnection() {
		@Override
		public void onServiceDisconnected(ComponentName name) {
			// 未连接为空
			iBackService = null;
		}

		@Override
		public void onServiceConnected(ComponentName name, IBinder service) {
			// 已连接
			iBackService = IBackService.Stub.asInterface(service);
		}
	};
}

服务端代码：

package com.mina;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.charset.Charset;

import org.apache.mina.core.session.IdleStatus;
import org.apache.mina.filter.codec.ProtocolCodecFilter;
import org.apache.mina.filter.codec.textline.TextLineCodecFactory;
import org.apache.mina.transport.socket.SocketAcceptor;
import org.apache.mina.transport.socket.nio.NioSocketAcceptor;

public class MinaServer {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		SocketAcceptor acceptor = new NioSocketAcceptor();
		 acceptor.getFilterChain().addLast("codec", new ProtocolCodecFilter(new TextLineCodecFactory(Charset.forName("UTF-8"))));  
		acceptor.setHandler(new ServerHandler());
		acceptor.getSessionConfig().setReadBufferSize(2048);  
        acceptor.getSessionConfig().setIdleTime(IdleStatus.BOTH_IDLE, 10);
		int bindPoit = 9900;
		try {
			acceptor.bind(new InetSocketAddress(bindPoit));
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

}