一道zhangying机试题

功能很好实现，但是用到的设计模式没有搞清楚，有一句话没太懂：每个调节项目调节时触发的动作会修改，不知道是什么含义，有明白的童鞋指导一下，选用何种设计模式。

下面看一下功能代码：

1.MainActivity.java:

package com.yayun.zhangyingtest;

import android.R.integer;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.SeekBar;
import android.widget.LinearLayout.LayoutParams;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;

public class CopyOfMainActivity extends Activity implements OnClickListener,SetValue {
  private LinearLayout mLinearLayoutTVs;
  private Button btn_color, btn_light, btn_saturation;
  private TextView tv_color_value, tv_light_value, tv_saturation_value;
  private SeekBar seekBar;
  private int i=0;
  private final int TVLightId=0x001;
  private final int TVColorId=0x002;
  private final int TVSaturationId=0x003;
  private final int BtnLightId=0x100;
  private final int BtnColorId=0x200;
  private final int BtnSaturationId=0x300;
  

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main1);
    
    seekBar = (SeekBar) findViewById(R.id.seekbar);
    mLinearLayoutTVs = (LinearLayout) findViewById(R.id.ll_tvs);
    AddWidget("亮度", "80", tv_light_value, btn_light,BtnLightId,TVLightId);
    AddWidget("色彩", "100", tv_color_value, btn_color,BtnColorId,TVColorId);
    AddWidget("饱和度", "90", tv_saturation_value, btn_saturation,BtnSaturationId,TVSaturationId);
    btn_color=(Button)findViewById(BtnColorId);
    btn_light=(Button)findViewById(BtnLightId);
    btn_saturation=(Button)findViewById(BtnSaturationId);
    
    tv_color_value=(TextView)findViewById(TVColorId);
    tv_light_value=(TextView)findViewById(TVLightId);
    tv_saturation_value=(TextView)findViewById(TVSaturationId);
    seekBar.setProgress(getProgress(tv_light_value));
    btn_color.setOnClickListener(this);
    btn_light.setOnClickListener(this);
    btn_saturation.setOnClickListener(this);
    seekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
      
      @Override
      public void onStopTrackingTouch(SeekBar arg0) {
        // TODO Auto-generated method stub
        
      }
      
      @Override
      public void onStartTrackingTouch(SeekBar arg0) {
        // TODO Auto-generated method stub
        
      }
      
      @Override
      public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
        if(i==0){
          tv_light_value.setText(String.valueOf(progress));
        }else if(i==1){
          tv_color_value.setText(String.valueOf(progress));
          
        }else{
          tv_saturation_value.setText(String.valueOf(progress));
        }
        
      }
    });
    

  }

  

  private void AddWidget(String textViewName, String textViewValue,
      TextView tv_value, Button btnId,int btnIntID,int tvIntID) {
     LinearLayout.LayoutParams lp3=new LinearLayout.LayoutParams(0, LayoutParams.WRAP_CONTENT);

    LinearLayout ll_tvsLayout = (LinearLayout) findViewById(R.id.ll_tvs);
    LinearLayout ll_btnsLayout = (LinearLayout) findViewById(R.id.ll_btns);
    final LinearLayout layout2 = new LinearLayout(this);
    layout2.setOrientation(LinearLayout.HORIZONTAL);
    TextView tv_name = new TextView(this);
    tv_name.setText(textViewName + ":");
    tv_value = new TextView(this);
    tv_value.setId(tvIntID);
    tv_value.setText(textViewValue);

    btnId = new Button(this);
    btnId.setText(textViewName);
    btnId.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 1.0f)); 
    btnId.setId(btnIntID);
    layout2.addView(tv_name);
    layout2.addView(tv_value);
    ll_tvsLayout.addView(layout2);
    ll_btnsLayout.addView(btnId);

  }

  private int getProgress(TextView tv) {
    return Integer.parseInt(tv.getText().toString());
  }

  @Override
  public void onClick(View v) {
    switch (v.getId()) {
    case BtnLightId:
      i=0;
      seekBar.setProgress(getProgress(tv_light_value));

      break;
    case BtnColorId:
      i=1;
      seekBar.setProgress(getProgress(tv_color_value));

      break;
    case BtnSaturationId:
      i=2;
      seekBar.setProgress(getProgress(tv_saturation_value));
      break;

    default:
      break;
    }

  }



  @Override
  public void SetLight(int value) {//实设预留方法
    // TODO Auto-generated method stub
    
  }



  @Override
  public void SetColor(int value) {
    // TODO Auto-generated method stub
    
  }



  @Override
  public void SetSaturature(int value) {
    // TODO Auto-generated method stub
    
  }

}

2.布局文件

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <LinearLayout
        android:id="@+id/ll_tvs"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingLeft="10dp"
        android:paddingTop="20dp"
        android:orientation="vertical" >
                
    </LinearLayout>

    <SeekBar
        android:id="@+id/seekbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_above="@+id/ll_btns"
        android:max="100" />

    <LinearLayout
        android:id="@+id/ll_btns"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:orientation="horizontal" >

       
    </LinearLayout>

</RelativeLayout>

运行如下：

但是没有达到题目要求的，用设计模式实现，求大神指导！！多谢