Summary of the design ideas of Android app program

A summary of the design ideas of Android app program design and implementation of model

Establish business Pojo, such as user

public class User{    private int userId;    private String userName;    public User(int userId, String userName){        this.userId = userId;        this.userName = userName;    }    public void setUserId(int userId){        this.userId = userId;    }    public void setUserName(String userName){        this.userName = userName;    }    public int getUserId(){        return this.userId;    }    public String getUserName(){        return this.userName;    }}

Design and implementation of interface between two and net networks

1, request the format definition.

http://192.168.1.31/CommandHandler.ashx{"MessageContent":"{‘CourierId‘:‘652‘,‘TrackingY‘:31.174406,‘Province‘:‘上海市‘,‘District‘:‘闵行区‘,‘City‘:‘上海市‘,‘TrackingX‘:121.39061,‘Address‘:‘上海市闵行区万源路2163号‘}","Passport":"mWEKICmWIVD0YRGXMSRC5HH7SYVMIVlVEGOMRK","Function":"AddCourierTracking","Usage":"User"}

2, return format definition

{"ResultFlag":1,"ErrorMessage":null,"Passport":"mWEKICmWIVD0YRGXMSRC5HH7SYVMIVlVEGOMRK","MessageContent":{\"Result\":null,\"ResponseStatus\":{\"ErrorCode\":\"1\",\"Message\":null,\"StackTrace\":null,\"Errors\":null}}}

3, the implementation method needs to adapt to a variety of situations (method overloading), internal implementation needs to avoid duplication (cohesion).

public class NetUtil{    public static void doPost(Context context, HashMap<String,String> map, Handler handler, Callback callBack){        doRequest(context, map, handler, callBack);    }    public static void doGet(Context context, Handler handler, CallBack callBack){        doRequest(context, null, handler, callBack);    }     private static void doRequest(Context context, HashMap<String,String> map, Handler handler, Callback callBack){        ...    }}

Third, UI interface framework

1, define your own superclass such as MyActivity, myfragment

public class MyActivity extends Activity{}

2, set up the Super-class chain (), insert the log, Toast, progress bar, navigation bar, title bar and other common UI elements, separately inserted is to facilitate the expansion and removal.

public class LoggableActivity extends Activity{    protected static String TAG = this.getClass.getSimpleName();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        LogUtil.log(TAG,"onCreate()");    }}

3, respectively, to implement the individual pages, inherited from the lowest level of super class.

public class LoginActivity extends LoggableActivity{}

4,adapter,service,broadcast and other similar.

Iv. Management Data

1, use ContentProvider.

2, use SQLite.

3, File mode storage (sharedperference, SD card) need to add encryption and decryption.

4, use a memory cache policy, such as the LRU algorithm.

V. Release and Proguard

1, all classes defined by Androidmanifest.xml cannot be confused, so the key business logic implementation removes the called class.

2, the referenced third-party package cannot be confused.

Summary of the design ideas of Android app program