谈中型项目下的编码技巧二

良好的代码编写风格，写好的代码几乎不用调试。
方法:
1.适当的用全局变量，如控件，adapter,DB，其他定义的类。
2.多建立initSomething 函数

全局变量如下

public class MainActivity extends Activity {
Button sure;
EditText login;
EditText pws;
CheckBox checkButton;
LoginDB mydb;
ProductDB myProductDB;
ToAddrDB myToAddrDB;
HistoryDB myHistoryDB;
TextView pwstext;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

}

初始化全局变量构造一个init()函数来初始话，这样的话一个activity有时候想换布局就容易多了。
而如果要给数据赋值构造一个initData或initDB的函数

/* 展开看接口,
*
* */
package com.sqlitedb;
import java.io.File;
import com.ProjectClass.Client;
import com.ProjectClass.Product;
import com.ProjectClass.ToAddr;
import com.projectConstant.ProjectConstant;
import com.sqtest.R;
import android.app.Activity;
import android.database.Cursor;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends Activity {
Button sure;
EditText login;
EditText pws;
CheckBox checkButton;
LoginDB mydb;
ProductDB myProductDB;
ToAddrDB myToAddrDB;
HistoryDB myHistoryDB;
TextView pwstext;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
}
public void init(){
sure = (Button)findViewById(R.id.button1);
login = (EditText)findViewById(R.id.editText2);
pws = (EditText)findViewById(R.id.editText1);
checkButton = (CheckBox)findViewById(R.id.checkBox1);
pwstext = (TextView)findViewById(R.id.textview1);
mydb = new LoginDB(this);
myProductDB = new ProductDB(this);
myToAddrDB = new ToAddrDB(this);
myHistoryDB = new HistoryDB(this);
//sure.setOnClickListener(productClick);
InitDB();
//sure.setOnClickListener(Clientclick);
sure.setOnClickListener(HistoryClick);
}

public void InitDB(){
markDir();
Product myproductInfo;
String tcprices[] = {"30", "20", "15", "30", "90", "50"};
String tcproductNames[] = {"烤鸭", "烤鸡", "烤牛", "烤猪", "烤狗","烤鼠"};
String tcnumbers[] = {"1", "2", "3", "4", "5", "6"};
//String types[] = {"1", "2", "1", "1", "3","2"};

for(int i =0; i < tcprices.length; i++){
myproductInfo = new Product();//必须这样在这里new
String price = tcprices[i];
myproductInfo.setProduct("贪吃吧", tcproductNames[i], "null", price, tcnumbers[i]);
myProductDB.operateProduct(myproductInfo);
//myHistoryDB.operateHProduct("lilin", types[i], myproductInfo);
}

String kxprices[] = {"30", "20", "15", "30", "90", "50"};
String kxproductNames[] = {"溜冰", "滑雪", "吹牛", "自恋", "遛狗","溜鼠"};
String kxnumbers[] = {"1", "2", "3", "4", "5", "6"};
//String types[] = {"1", "2", "1", "1", "3","2"};

for(int i =0; i < kxprices.length; i++){
myproductInfo = new Product();//必须这样在这里new
String price = kxprices[i];
myproductInfo.setProduct("开心吧", kxproductNames[i], "null", price, kxnumbers[i]);
myProductDB.operateProduct(myproductInfo);
//myHistoryDB.operateHProduct("lilin", types[i], myproductInfo);
}

String lyprices[] = {"30", "20", "15", "30", "90", "50"};
String lyproductNames[] = {"井冈山", "青原山", "庐山", "泰山", "江郎山","老虎山"};
String lynumbers[] = {"2", "2", "2", "2", "2", "2"};
//String types[] = {"1", "2", "1", "1", "3","2"};

for(int i =0; i < lyprices.length; i++){
myproductInfo = new Product();//必须这样在这里new
String price = lyprices[i];
myproductInfo.setProduct("健康吧", lyproductNames[i], "null", price, lynumbers[i]);
myProductDB.operateProduct(myproductInfo);
//myHistoryDB.operateHProduct("lilin", types[i], myproductInfo);
}

String tgprices[] = {"30", "20", "15", "30", "90", "50"};
String tgproductNames[] = {"IPhone5", "u8500", "z470", "y480", "诺基亚","诺亚信"};
String tgnumbers[] = {"1", "2", "3", "4", "5", "6"};
//String types[] = {"1", "2", "1", "1", "3","2"};

for(int i =0; i < tgprices.length; i++){
myproductInfo = new Product();//必须这样在这里new
String price = tgprices[i];
myproductInfo.setProduct("团购吧", tgproductNames[i], "null", price, tgnumbers[i]);
myProductDB.operateProduct(myproductInfo);
//myHistoryDB.operateHProduct("lilin", types[i], myproductInfo);
}

String toName[] = {"老张", "老莫","老吴", "老应", "老周"};
String toAddr[] = {"31栋127", "31栋130", "31栋119", "31栋110", "31栋129"};
String toTel[] = {"18903067930", "18103067930", "18206067930", "18307067430", "18707067430"};
ToAddr myToAddr = new ToAddr();
for(int i = 0; i < 5; i++ ){
myToAddr.setAddrAndTel("lilin", toName[i], toAddr[i], toTel[i],"false", "false");
myToAddrDB.operateToAddrDB(myToAddr);
}
}
}

一些全局变量的使用能减少好多代码。