Android Open Source - Abstract-Model Users Activity

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License

The source code is released under:

Apache License

Java Source Code

package com.logician.abstractModel.examples;
/*  w  w  w.jav  a2  s.c  o  m*/
import java.util.List;

import com.logician.abstractModel.AsyncModelFactory.ListCallback;

import android.app.Activity;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;

public class UsersActivity extends Activity implements ListCallback<User>{
  private List<User> users;
  
  
  
  @Override
  public void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);
    //setContentView(R.layout.activity_main);
            
    initUsers();
    
    showUsers();
  }
  

  private void showUsers() {
    /*
     * Do whatever with the list of Users here.
     * Perhaps send them to a ListAdapter for display in a ListView. 
     *     
     */
  }

  /*
   *  You probably want to use an implementation of Loader instead,
   *  preferably CursorLoader.
   *  Then your ContentProvider can call getContext().getContentResolver().notifyChange()
   *  to automatically update your views on a user operation.
   *  
   */
  private void initUsers() {
    SQLiteDatabase db = MyDatabaseOpenHelper.getInstance(this).getReadableDatabase();
    Cursor cursor = db.query(new User().getTableName(),
        null,
        null,
        null,
        null,
        null,
        null);
    
    // That is seriously all you have to do!
    // (UsersActivity implements ListCallback<User>, so we just have to pass "this".
    User.ASYNC_FACTORY.listFromCursor(cursor, this);
    
    }
  
  private void setUsers(List<User> list){
    users = list;
    // Update ListAdapters, etc
    
  }
  
  private void createUser(String username, String password){
    User newUser = new User();
    newUser.username = username;
    newUser.password = password; 
    
    SQLiteDatabase db = MyDatabaseOpenHelper.getInstance(this).getWritableDatabase();
    db.insert(newUser.getTableName(), null, newUser.toContentValues());
  }
  
  private void login(String username, String password){
    User user = new User();    
    
    SQLiteDatabase db = MyDatabaseOpenHelper.getInstance(this).getReadableDatabase();
    Cursor cursor = db.query(user.getTableName(),
        null,
        User.USERNAME+"=?",
        new String[]{username},
        null,
        null,
        null);
        
    if(cursor.moveToFirst()){      
      
      user.fromCursor(cursor);
      
      
      if(user.password == password)
        loginSuccess(user);
      
              
    } else{
      failLogin(username, "Username does not exist!");
    }
      
      
    
  }
  
  private void changePassword(User user, String newPassword){
    user.password = newPassword;
    
    
  }
  
  private void loginSuccess(User user) {
    /*
     * The login was a success! Report it to the user, allow them to perform
     * restricted actions, etc.
     */
    
  }


  private void failLogin(String username, String message){
    /* 
     * Show an error message, log the failed attempt, etc.
     */
  }


  @Override
  public void onResult(List<User> models) {
    setUsers(models);
    
  }

  
}

Java Source Code List

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