Sqlite无法看到表格..？

-3

我跟着这个例子（https://www.youtube.com/watch?v=W0UHXTqlwMc），但我添加了数字编辑文本的名称（对话框中的2个editexts）任何人都可以帮助我，为什么我得到错误？Sqlite无法看到表格..？

LOG

11-18 15:26:07.260 23999-23999/com.example.mike.phonebook3 E/AndroidRuntime: FATAL EXCEPTION: main 
                     Process: com.example.mike.phonebook3, PID: 23999 
                     java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.mike.phonebook3/com.example.mike.phonebook3.MainActivity}: android.database.sqlite.SQLiteException: no such table: hh_TB (code 1): , while compiling: SELECT id, name, number FROM hh_TB 
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184) 
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233) 
                      at android.app.ActivityThread.access$800(ActivityThread.java:135) 
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
                      at android.os.Handler.dispatchMessage(Handler.java:102) 
                      at android.os.Looper.loop(Looper.java:136) 
                      at android.app.ActivityThread.main(ActivityThread.java:5001) 
                      at java.lang.reflect.Method.invokeNative(Native Method) 
                      at java.lang.reflect.Method.invoke(Method.java:515) 
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:801) 
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:617) 
                      at dalvik.system.NativeStart.main(Native Method) 
                      Caused by: android.database.sqlite.SQLiteException: no such table: hh_TB (code 1): , while compiling: SELECT id, name, number FROM hh_TB 
                      at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method) 
                      at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:889) 
                      at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:500) 
                      at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588) 
                      at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58) 
                      at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37) 
                      at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44) 
                      at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1314) 
                      at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1161) 
                      at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1032) 
                      at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1200) 
                      at com.example.mike.phonebook3.mDataBase.DBAdapter.retrieve(DBAdapter.java:60) 
                      at com.example.mike.phonebook3.MainActivity.getSpacecrafts(MainActivity.java:123) 
                      at com.example.mike.phonebook3.MainActivity.onCreate(MainActivity.java:40) 
                      at android.app.Activity.performCreate(Activity.java:5231) 
                      at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148) 
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)  
                      at android.app.ActivityThread.access$800(ActivityThread.java:135)  
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)  
                      at android.os.Handler.dispatchMessage(Handler.java:102)  
                      at android.os.Looper.loop(Looper.java:136)  
                      at android.app.ActivityThread.main(ActivityThread.java:5001)  
                      at java.lang.reflect.Method.invokeNative(Native Method)  
                      at java.lang.reflect.Method.invoke(Method.java:515)  
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:801)  
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:617)  
                      at dalvik.system.NativeStart.main(Native Method)

MainActivity

 ListView lv; 
EditText nameEditText,numberEditText; 
Button save,retrive; 
ArrayList<Spacecraft>spacecrafts=new ArrayList<>(); 
CustomAdapter adapter; 
Boolean forUpdate=true; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
    setSupportActionBar(toolbar); 

      lv=(ListView)findViewById(R.id.lv); 
    adapter=new CustomAdapter(this,spacecrafts); 
    this.getSpacecrafts(); 
    // lv.setAdapter(adapter); 


    FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab); 
    fab.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
       displayDialog(false); 
     } 
    }); 
} 

private void displayDialog (Boolean forUpdate) 
{ 
    Dialog d=new Dialog(this); 
    d.setTitle("SQLite DATA"); 
    d.setContentView(R.layout.dialog_layout); 

    nameEditText= (EditText) d.findViewById(R.id.nameEditTxt); 
    numberEditText=(EditText)d.findViewById(R.id.numberEditTxt); 
    save=(Button)d.findViewById(R.id.saveBtn); 
    retrive=(Button)d.findViewById(R.id.retriveBtn); 


    if(!forUpdate) { 
     save.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       save(nameEditText.getText().toString(),numberEditText.getText().toString()); 

      } 
     }); 
     retrive.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
        getSpacecrafts(); 
      } 
     }); 
    } else { 

     // set selected text 
     nameEditText.setText(adapter.getSelectedItemID()); 
     numberEditText.setText(adapter.getSelectedItemID()); 
     save.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       update(nameEditText.getText().toString(),numberEditText.getText().toString()); 
      } 
     }); 
     retrive.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
        getSpacecrafts(); 
      } 

     }); 
    } 


    d.show(); 
} 


//SAVE 
private void save(String name , String number){ 

    DBAdapter db= new DBAdapter(this); 
    db.openDB(); 
    boolean saved=db.add(name,number); 

    if(saved){ 
     nameEditText.setText(""); 
     getSpacecrafts(); 
    }else { 
     Toast.makeText(this,"Unable to save",Toast.LENGTH_SHORT).show(); 
    } 
} 
//Retrive or GetSpaceCrafts 
private void getSpacecrafts(){ 
    spacecrafts.clear(); 
    DBAdapter db= new DBAdapter(this); 
    db.openDB(); 
    Cursor c = db.retrieve(); 
    Spacecraft spacecraft=null; 


    while (c.moveToNext()){ 
     int id =c.getInt(0); 
     String name=c.getString(1); 
     String number=c.getString(1); 

     spacecraft=new Spacecraft(); 
     spacecraft.setId(id); 
     spacecraft.setName(name); 
     spacecraft.setNumber(number); 


     spacecrafts.add(spacecraft); 
    } 
    db.closeDB(); 
    lv.setAdapter(adapter); 
} 

//Update or Edit 
private void update(String newName , String newNum) 
{ 
    //Get Id of SpaceCraft 
    int id=adapter.getSelectedItemID(); 


    //Update in DB 
    DBAdapter db = new DBAdapter(this); 
    db.openDB(); 
    boolean updated=db.update(newName,newNum,id); 
    db.closeDB(); 


    if(updated){ 
     nameEditText.setText(newName); 
     numberEditText.setText(newNum); 
     getSpacecrafts(); 
    }else { 
     Toast.makeText(this,"unable to update",Toast.LENGTH_SHORT).show(); 
    } 
} 
private void delete() 
{ 
    //Get id 
    int id = adapter.getSelectedItemID(); 

    //delete from db 
    DBAdapter db=new DBAdapter(this); 
    db.openDB(); 
    boolean deleted = db.delete(id); 
    db.closeDB(); 

    if(deleted) 
    { 
     getSpacecrafts(); 
    }else { 
     Toast.makeText(this,"unable to delete",Toast.LENGTH_SHORT).show(); 

    } 
} 

@Override 
public boolean onContextItemSelected(MenuItem item) { 
    CharSequence title = item.getTitle(); 
    if(title=="New") 
    { 
     displayDialog(!forUpdate); 

    }else if (title=="Edit") 
    { 
     displayDialog(forUpdate); 
    }else if (title=="Delete"){ 
      delete(); 
    } 
    return super.onContextItemSelected(item); 
}

常量

static final String ROW_ID="id"; 
static final String NAME="name"; 
static final String NUMBER="number"; 


//properties 
static final String DB_NAME="hh_DB"; 
static final String TB_NAME="hh_TB"; 
static final int DB_VERSION=1; 

//creating tb 
static final String CREATE_TB="CREATE TABLE hh_TB(id INTEGER PRIMARY KEY AUTOINCREMENT," 
     + "name TEXT NOT NULL" + "number TEXT NOT NULL);"; 



//DROP TB 
static final String DROP_TB="DROP TABLE IF EXISTS " +TB_NAME; 


    }

DBHELPER

public class DBHelper extends SQLiteOpenHelper{ 
public DBHelper(Context context) { 
    super(context, Constants.DB_NAME, null, Constants.DB_VERSION); 
} 

@Override 
public void onCreate(SQLiteDatabase db) { 
    try { 
     db.execSQL(Constants.CREATE_TB); 
    } catch (SQLException e) { 
     e.printStackTrace(); 
    } 
} 

@Override 
public void onUpgrade(SQLiteDatabase db, int i, int i1) { 
     db.execSQL(Constants.DROP_TB); 
    onCreate(db); 
} 
}

将对DBAdapter

Context c; 
    SQLiteDatabase db; 
    DBHelper helper; 

    public DBAdapter(Context c) { 
     this.c = c; 
     helper = new DBHelper(c); 
    } 


    public void openDB() { 
     try { 
      db = helper.getWritableDatabase(); 
     } catch (SQLException e) { 
      e.printStackTrace(); 
     } 
    } 
public void closeDB() { 
    try { 
     helper.close(); 
    } catch (SQLException e) { 
     e.printStackTrace(); 
    } 
} 


//save 
public boolean add(String name, String number) { 
    try { 
     ContentValues cv = new ContentValues(); 
     cv.put(Constants.NAME, name); 
     cv.put(Constants.NUMBER, number); 
     long result = db.insert(Constants.TB_NAME, Constants.ROW_ID, cv); 
     if (result > 0) { 
      return true; 
     } 
    } catch (SQLException e) { 
     e.printStackTrace(); 
    } 
    return false; 
} 

//Select 
public Cursor retrieve() { 
    String[] columns = {Constants.ROW_ID, Constants.NAME, Constants.NUMBER}; 
    Cursor c = db.query(Constants.TB_NAME, columns, null, null, null, null, null); 
    return c; 
} 

//Update/edit 
public boolean update(String newName, String newNumber, int id) { 
    try { 
     int result = db.delete(Constants.TB_NAME, Constants.ROW_ID + " =?", new String[]{String.valueOf(id)}); 
     if (result > 0) { 
      return true; 
     } 
    } catch (SQLException e) { 

    } 
    return false; 

} 

//Delete///Reomve 

public boolean delete(int id) { 
    try { 
     int result = db.delete(Constants.TB_NAME, Constants.ROW_ID + " =?", new String[]{String.valueOf(id)}); 
     if (result > 0) { 
      return true; 
     } 
    } catch (SQLException e) { 

    } 
    return false; 

} 
}

我可以提供U带更多的类，如果你想我不能吃午饭的应用

来源

2016-11-18 Dr.Easy

你的数据库代码在哪？你正在越来越'SQLiteException：没有这样的表：' –

检查编辑的代码 –

和为什么**** downvoting的人???如果你知道答案，或者很简单，你不要因为我们是新的而使其失望，因为我们是新的：@ –

您的SQL语法错误：

static final String CREATE_TB="CREATE TABLE hh_TB(id INTEGER PRIMARY KEY AUTOINCREMENT," 
    + "name TEXT NOT NULL" + "number TEXT NOT NULL);";

name和number之间缺少,列。

添加缺失,。
删除catch块。 onCreate()必须抛出，如果有问题，而不是隐藏它们。
卸载您的应用程序以使onCreate()再次运行。 When is SQLiteOpenHelper onCreate()/onUpgrade() run?

来源

2016-11-18 11:45:28 laalto

omg。你太快了。写相同的答案。 –

它打开了活动，但当我按下浮动按钮打开对话框时，我得到这个错误（java.lang.IllegalArgumentException：我们已经有一个EditText，只能有一个） –

我知道错误并解决它有关editText 但我填写edittext 1（名称），然后填写数字（edittext 2）文本显示2倍textinside编辑文本 –

Sqlite无法看到表格..？

回答

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