适配器模式

多一点真诚、多一点套路、少一点随意---  适配器模式Adapter

文章来源：http://blog.youkuaiyun.com/guolin_blog/article/details/9400141

package com.pattern.count;

public interface ServerPlayerCount {

    String getServerName();//服务器名称

    int getPlayerCount();//服务器玩家数
}

package com.pattern.countImpl;

import com.pattern.Utils.UtilsOld;
import com.pattern.count.ServerPlayerCount;

public class ServerOneCount extends UtilsOld implements ServerPlayerCount {
    @Override
    public String getServerName() {
        return "服务器1";
    }

    @Override
    public int getPlayerCount() {
        return getOnlinePlayerCount();
    }

    @Override
    public String toString() {
        return "ServerOneCount{" + getServerName() + "  " + getPlayerCount() + " }";
    }
}

package com.pattern.countImpl;

import com.pattern.Utils.Utils;
import com.pattern.count.ServerPlayerCount;

public class ServerTwoCount implements ServerPlayerCount {
    @Override
    public String getServerName() {
        return "服务器2";
    }

    @Override
    public int getPlayerCount() {
        return Utils.getOnlinePlayerCount(2);
    }

    @Override
    public String toString() {
        return "ServerTwoCount{" + getServerName() + "  " + getPlayerCount() + " }";
    }
}

package com.pattern.Utils;

public class Utils {
    public static int getOnlinePlayerCount(int serverId) {
        if (serverId == 2)
            return 2000;
        if (serverId == 3)
            return 3000;
        return -1;
    }
}

package com.pattern.Utils;

public class UtilsOld {
    public static int getOnlinePlayerCount() {
        return 1000;
    }

}

package com.pattern.main;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;

import com.pattern.count.ServerPlayerCount;
import com.pattern.countImpl.ServerOneCount;
import com.pattern.countImpl.ServerTwoCount;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "MainActivity";

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

        ServerPlayerCount serverPlayerCount = new ServerOneCount();
        Log.i(TAG, "onCreate: " + serverPlayerCount.toString());

        serverPlayerCount = new ServerTwoCount();
        Log.i(TAG, "onCreate: " + serverPlayerCount.toString());

    }
}