SQLite在android上不起作用

我尝试将SQLite添加到我的项目中，但当我尝试在emulator上运行我的应用程序时，它会显示这些错误，我对此一无所知

[2012-10-25 14:16:29 - DeviceMonitor] Adb connection Error:An existing connection was                   forcibly closed by the remote host 
[2012-10-25 14:16:29 - Unexpected error while launching logcat. Try reselecting the device.] An existing connection was forcibly closed by the remote host
java.io.IOException: An existing connection was forcibly closed by the remote host
at sun.nio.ch.SocketDispatcher.read0(Native Method)
at sun.nio.ch.SocketDispatcher.read(Unknown Source)
at sun.nio.ch.IOUtil.readIntoNativeBuffer(Unknown Source)
at sun.nio.ch.IOUtil.read(Unknown Source)
at sun.nio.ch.SocketChannelImpl.read(Unknown Source)
at com.android.ddmlib.AdbHelper.executeRemoteCommand(AdbHelper.java:395)
at com.android.ddmlib.Device.executeShellCommand(Device.java:462)
at com.android.ddmuilib.logcat.LogCatReceiver$1.run(LogCatReceiver.java:109)
at java.lang.Thread.run(Unknown Source)

   [2012-10-25 14:16:30 - DeviceMonitor] Connection attempts: 1

我遵循了本教程：

我的处理程序类：

 public class DatabaseHandler extends SQLiteOpenHelper {

 // All Static variables
// Database Version
private static final int DATABASE_VERSION = 1;

// Database Name
private static final String DATABASE_NAME = "PHM";

// Contacts table name
private static final String TABLE_USERS = "Users";

// Users Table Columns names
private static final String KEY_ID = "_id";
private static final String KEY_NAME = "name";
private static final String KEY_PASS = "password";

public DatabaseHandler(Context context) {
    super(context, DATABASE_NAME, null, DATABASE_VERSION);
}

// Creating Tables
@Override
public void onCreate(SQLiteDatabase db) {
    String CREATE_USERS_TABLE = "CREATE TABLE " + TABLE_USERS + "("
            + KEY_ID + " INTEGER PRIMARY KEY," + KEY_NAME + " TEXT,"
            + KEY_PASS + " TEXT" + ")";
    db.execSQL(CREATE_USERS_TABLE);
}

// Upgrading database
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    // Drop older table if existed
    db.execSQL("DROP TABLE IF EXISTS " + TABLE_USERS);

    // Create tables again
    onCreate(db);

}

public void addUser(User user) {
    SQLiteDatabase db = this.getWritableDatabase();

    ContentValues values = new ContentValues();
    values.put(KEY_NAME, user.get_name()); // User Name
    values.put(KEY_PASS, user.get_pass()); // User Phone Number

    // Inserting Row
    db.insert(TABLE_USERS, null, values);
    db.close(); // Closing database connection
}
// Getting single User
public User getUser(int id) {
    SQLiteDatabase db = this.getReadableDatabase();

    Cursor cursor = db.query(TABLE_USERS, new String[] { KEY_ID,
            KEY_NAME, KEY_PASS }, KEY_ID + "=?",
            new String[] { String.valueOf(id) }, null, null, null, null);
    if (cursor != null)
        cursor.moveToFirst();

    User user = new User(Integer.parseInt(cursor.getString(0)),
            cursor.getString(1), cursor.getString(2));
    return user;
}

 public List<User> getAllUsers() {
        List<User> contactList = new ArrayList<User>();
        // Select All Query
        String selectQuery = "SELECT  * FROM " + TABLE_USERS;

        SQLiteDatabase db = this.getWritableDatabase();
        Cursor cursor = db.rawQuery(selectQuery, null);

        // looping through all rows and adding to list
        if (cursor.moveToFirst()) {
            do {
                User user = new User();
                user.set_id(Integer.parseInt(cursor.getString(0)));
                user.set_name(cursor.getString(1));
                user.set_pass(cursor.getString(2));
                // Adding contact to list
                contactList.add(user);
            } while (cursor.moveToNext());
        }

        // return contact list
        return contactList;
    }

// Getting users Count
    public int getUsersCount() {
        String countQuery = "SELECT  * FROM " + TABLE_USERS;
        SQLiteDatabase db = this.getReadableDatabase();
        Cursor cursor = db.rawQuery(countQuery, null);
        cursor.close();

        // return count
        return cursor.getCount();
    }

    // Updating single contact
    public int updateContact(User user) {
        SQLiteDatabase db = this.getWritableDatabase();

        ContentValues values = new ContentValues();
        values.put(KEY_NAME, user.get_name());
        values.put(KEY_PASS, user.get_pass());

        // updating row
        return db.update(TABLE_USERS, values, KEY_ID + " = ?",
                new String[] { String.valueOf(user.get_id()) });
    }

    // Deleting single user
    public void deleteUser(User user) {
        SQLiteDatabase db = this.getWritableDatabase();
        db.delete(TABLE_USERS, KEY_ID + " = ?",
                new String[] { String.valueOf(user.get_id()) });
        db.close();
    }
}

类别：

 public class mean implements Cloneable{
private WebView mAppView;
private static DroidGap mGap;
DatabaseHandler db = new DatabaseHandler(mGap);  
  public mean(DroidGap gap, WebView view)
  {
    mAppView = view;
    mGap = gap;
  }

  public void AddUser(String name,String pass ){
        User user=new User(name,pass);
        db.addUser(user);
  }
  public String getAllUsers(){
        String ret="ajab";
        List<User> toShow=db.getAllUsers();
        for(User a :toShow){
            ret+=a.get_name();
        }
        return  ret;

  }
  public String Generate(){
      QRCodeGenerator.getQRCode ("pic.JPG", "Hamed Mahsa Pouya");
      return "BEHI";
  }
}

我应该提到，有时我会看到第二个警报，但大多数时候我会看到这个异常

Uncaught Error: Error calling method on NPObject. at file:///android_asset/www/code.js:12

---

编辑这将解决第一个错误-感谢Selvin指出它
关闭eclipse
运行命令“adb kill server”
终止adb进程的所有运行实例

---

重新启动eclipse

如果您告诉我为什么，我将更改我的-1？因为错误显示您使用的是死机模拟器或设备，您需要重新启动它Yeah sure:在NPObject上调用方法时出错。。。第一个异常没有连接到代码OK my bad我看到了第一个错误他指出这是显示ADB连接错误我知道这不是我从那里得到的代码我只想提及我问题中的所有内容。

window.database

在phonegap中没有名为

AddUser

的方法<代码>窗口。数据库不是您的

数据库处理程序

。。。你们提到的教程是针对本机应用程序而不是phonegap的…我有另一个类，它有DatabaseHandler的实例…我将编辑我的问题to

appView.addJavascriptInterface（db，“somthingthasitinotDatabase”）

然后在javascript中使用

window.somthingtatisnotdatabase.AddUser

，并移动

db=newdatabasehandler（mGap）到构造函数
平均值（DroidGap gap，WebView视图）
仍然不起作用！：（我把它改为handler.and，然后移动你提到的那个。
function AddUser(name,pass){
    alert(name+"::::::"+pass);
    window.database.AddUser(name,pass);
    alert("pass");
}

Uncaught Error: Error calling method on NPObject. at file:///android_asset/www/code.js:12