public class Receiver {
public void action(){
System.out.print("command");
}
}
/**
* Created by Administrator on 2017-10-11.
* 命令接口
*/
public interface Command {
public void exe();
}
/**
* Created by Administrator on 2017-10-11.
* 命令類實現了Command接口
*/
public class MyCommand implements Command {
private Receiver receiver;
public MyCommand(Receiver receiver){
this.receiver=receiver;
}
@Override
public void exe() {
receiver.action();
}
}
/**
* Created by Administrator on 2017-10-11.
* 調用者(司令)
*/
public class Invoker {
private Command command;//命令
public Invoker(Command command){
this.command=command;
}
//動作
public void action(){
command.exe();
}
}
/**
* 命令模式(Command)
*/
public class CommandMethodActivity extends AppCompatActivity {
/**
* 司令員下令讓士兵去幹件事情,從整個事情的角度來考慮,司令員的作用是,發出口令,口令經過傳遞,
* 傳到了士兵耳朵裏,士兵去執行。這個過程好在,三者相互解耦,任何一方都不用去依賴其他人,
* 只需要做好自己的事兒就行,司令員要的是結果,不會去關注到底士兵是怎麼實現的。
* @param savedInstanceState
*/
// Invoker是調用者(司令員),Receiver是被調用者(士兵),MyCommand是命令,
// 實現了Command接口,持有接收對象,
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_command_method);
Receiver receiver=new Receiver();
Command cmd=new MyCommand(receiver);
Invoker invoker=new Invoker(cmd);
invoker.action();
}
}
github地址:https://github.com/zyj18410105150/DesignMode