Android中的工厂模式，目的就是减少if-else和switch-case的出现，梳理代码的条理，使逻辑更加清晰，下面直接上代码：

1.首先新建一个接口，用来监听我们的操作

public interface StrategyListenter {
    /**
     *
     * @param context 上下文
     * @param result  需要操作的数据
     * @param isHandled   判断是否进行下一步操作
     */
    void execute(Context context, int result, boolean[] isHandled);
}

2.重点来了，策略工厂类

public class StrategFactory {
    private List<StrategyListenter> list = new ArrayList<>();
    private static StrategFactory strategFactory = new StrategFactory();

    /**
     * 单列模式
     *
     * @return
     */
    public static StrategFactory init() {
        return strategFactory;
    }

    /**
     * 添加具体操作的类
     *
     * @param listenter
     * @return
     */
    public StrategFactory add(StrategyListenter listenter) {
        if (listenter != null) {
            list.add(listenter);
        }
        return this;
    }

    /**
     * 调用接口进行操作
     *
     * @param context
     * @param result  可根据实际情况进行修改
     */
    public void Scheduled(Context context, int result) {
        boolean[] isHandled = {false};
        for (StrategyListenter listenter : this.list) {
            if (isHandled[0]) {
                return;
            }
            listenter.execute(context, result, isHandled);

        }

    }

}

3.在Application中声明

public class MyApplication extends Application {

    @Override
    public void onCreate() {
        super.onCreate();
        StrategFactory strategFactory = StrategFactory.init();
        strategFactory.add(new NumberOne());
        strategFactory.add(new NumberTwo());
        strategFactory.add(new NumberThree());
        strategFactory.add(new NumberFour());
    }
}

4.具体的操作类，在这里面可以执行我们想要的操作

public class NumberOne implements StrategyListenter {
    @Override
    public void execute(Context context, int result, boolean[] isHandled) {
        if (result >= 0 && result < 60) {
            DilaogHelper.getDilaog(context, "提示信息", "不及格");
            isHandled[0] = false;
        }
    }
}

5.最后在MianActivity中应用

public class MainActivity extends AppCompatActivity {
    private EditText ed_input;
    private Button btn_submit;
    private int strInputNumber;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ed_input = (EditText) findViewById(R.id.ed_input);
        btn_submit = (Button) findViewById(R.id.btn_submit);
        btn_submit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                strInputNumber = Integer.valueOf(ed_input.getText().toString());
                StrategFactory.init().Scheduled(MainActivity.this, strInputNumber);
            }
        });
    }
}

6.自己封装的一个对话框帮助类

public class DilaogHelper {

    public static void getDilaog(Context context, String title, String message){
        new AlertDialog.Builder(context)
                .setTitle(title)
                .setMessage(message)
                .setPositiveButton("确定", null)
                .show();
    }

}

附：代码资源下载地址：
http://download.csdn.net/download/qq_32376365/9942966

}