SQLite不能在android

Question

上工作我試圖添加SQLite到我的項目中，但是當我嘗試在模擬器上運行我的應用程序時，它顯示了這些錯誤，我對此毫不知情！

[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 

我跟着這個教程： http://www.androidhive.info/2011/11/android-sqlite-database-tutorial/

我的處理程序類：

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(); 
    } 
} 

這是一個類，我用這個命令將它添加到我的JavaScript接口：

mean db= new mean(this, appView); 
appView.addJavascriptInterface(db, "database"); 

類：

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"; 
    } 
} 

在我的JavaScript我把我的功能是這樣的：

function AddUser(name,pass){ 
    alert(name+"::::::"+pass); 
    window.database.AddUser(name,pass); 
    alert("pass"); 
} 

我應該指出，有時候我看到了第二個警告，但大多數的時候我看到這個異常。

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

Answer 1

編輯這將解決的第一個錯誤-Thanks Selvin指出來
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