在Android的INSERT INTO數據庫中

-1

你好朋友我已經創建了一個數據庫。現在我想添加一個新的事件，但通過「INSERT INTO」我不想使用「contentvalues」。在Android的INSERT INTO數據庫中

這是我的代碼部分在此先感謝。

protected static final int DATABASE_VERSION = 1; 
protected static final String DATABSE_NAME = "eventDB.db"; 
protected static final String TABLE_EVENTS = "Events"; 

public static final String COLUMN_ID = "id"; 
public static final String COLUMN_EVENTNAME = "eventname"; 

String insertQuery = " INSERT INTO " + TABLE_EVENTS + "(" 
      + COLUMN_EVENTNAME + ")" + " VALUES (' " 
      + eventname + " ')"; 

    mDatabase.execSQL(insertQuery);

，這裏是錯誤日誌

09-21 15:20:15.992: E/AndroidRuntime(828): java.lang.IllegalStateException: Could not execute method of the activity 
09-21 15:20:15.992: E/AndroidRuntime(828): at android.view.View$1.onClick(View.java:3633) 
09-21 15:20:15.992: E/AndroidRuntime(828): at android.view.View.performClick(View.java:4240) 
09-21 15:20:15.992: E/AndroidRuntime(828): at android.view.View$PerformClick.run(View.java:17721) 
09-21 15:20:15.992: E/AndroidRuntime(828): at android.os.Handler.handleCallback(Handler.java:730) 
09-21 15:20:15.992: E/AndroidRuntime(828): at android.os.Handler.dispatchMessage(Handler.java:92) 
09-21 15:20:15.992: E/AndroidRuntime(828): at android.os.Looper.loop(Looper.java:137) 
09-21 15:20:15.992: E/AndroidRuntime(828): at android.app.ActivityThread.main(ActivityThread.java:5103) 
09-21 15:20:15.992: E/AndroidRuntime(828): at java.lang.reflect.Method.invokeNative(Native Method) 
09-21 15:20:15.992: E/AndroidRuntime(828): at java.lang.reflect.Method.invoke(Method.java:525) 
09-21 15:20:15.992: E/AndroidRuntime(828): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
09-21 15:20:15.992: E/AndroidRuntime(828): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
09-21 15:20:15.992: E/AndroidRuntime(828): at dalvik.system.NativeStart.main(Native Method) 
09-21 15:20:15.992: E/AndroidRuntime(828): Caused by: java.lang.reflect.InvocationTargetException 
09-21 15:20:15.992: E/AndroidRuntime(828): at java.lang.reflect.Method.invokeNative(Native Method) 
09-21 15:20:15.992: E/AndroidRuntime(828): at java.lang.reflect.Method.invoke(Method.java:525) 
09-21 15:20:15.992: E/AndroidRuntime(828): at android.view.View$1.onClick(View.java:3628) 
09-21 15:20:15.992: E/AndroidRuntime(828): ... 11 more 
09-21 15:20:15.992: E/AndroidRuntime(828): Caused by: android.database.CursorIndexOutOfBoundsException: Index 0 requested, with a size of 0 
09-21 15:20:15.992: E/AndroidRuntime(828): at android.database.AbstractCursor.checkPosition(AbstractCursor.java:424) 
09-21 15:20:15.992: E/AndroidRuntime(828): at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:136) 
09-21 15:20:15.992: E/AndroidRuntime(828): at android.database.AbstractWindowedCursor.getInt(AbstractWindowedCursor.java:68) 
09-21 15:20:15.992: E/AndroidRuntime(828): at com.database.DBManager.cursorToEvent(DBManager.java:96) 
09-21 15:20:15.992: E/AndroidRuntime(828): at com.database.DBManager.addEvent(DBManager.java:55) 
09-21 15:20:15.992: E/AndroidRuntime(828): at com.database.MainActivity.addClick(MainActivity.java:55) 
09-21 15:20:15.992: E/AndroidRuntime(828): ... 14 more 
09-21 15:38:20.721: E/AndroidRuntime(887): FATAL EXCEPTION: main 
09-21 15:38:20.721: E/AndroidRuntime(887): java.lang.IllegalStateException: Could not execute method of the activity 
09-21 15:38:20.721: E/AndroidRuntime(887): at android.view.View$1.onClick(View.java:3633) 
09-21 15:38:20.721: E/AndroidRuntime(887): at android.view.View.performClick(View.java:4240) 
09-21 15:38:20.721: E/AndroidRuntime(887): at android.view.View$PerformClick.run(View.java:17721) 
09-21 15:38:20.721: E/AndroidRuntime(887): at android.os.Handler.handleCallback(Handler.java:730) 
09-21 15:38:20.721: E/AndroidRuntime(887): at android.os.Handler.dispatchMessage(Handler.java:92) 
09-21 15:38:20.721: E/AndroidRuntime(887): at android.os.Looper.loop(Looper.java:137) 
09-21 15:38:20.721: E/AndroidRuntime(887): at android.app.ActivityThread.main(ActivityThread.java:5103) 
09-21 15:38:20.721: E/AndroidRuntime(887): at java.lang.reflect.Method.invokeNative(Native Method) 
09-21 15:38:20.721: E/AndroidRuntime(887): at java.lang.reflect.Method.invoke(Method.java:525) 
09-21 15:38:20.721: E/AndroidRuntime(887): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
09-21 15:38:20.721: E/AndroidRuntime(887): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
09-21 15:38:20.721: E/AndroidRuntime(887): at dalvik.system.NativeStart.main(Native Method) 
09-21 15:38:20.721: E/AndroidRuntime(887): Caused by: java.lang.reflect.InvocationTargetException 
09-21 15:38:20.721: E/AndroidRuntime(887): at java.lang.reflect.Method.invokeNative(Native Method) 
09-21 15:38:20.721: E/AndroidRuntime(887): at java.lang.reflect.Method.invoke(Method.java:525) 
09-21 15:38:20.721: E/AndroidRuntime(887): at android.view.View$1.onClick(View.java:3628) 
09-21 15:38:20.721: E/AndroidRuntime(887): ... 11 more 
09-21 15:38:20.721: E/AndroidRuntime(887): Caused by: android.database.CursorIndexOutOfBoundsException: Index 0 requested, with a size of 0 
09-21 15:38:20.721: E/AndroidRuntime(887): at android.database.AbstractCursor.checkPosition(AbstractCursor.java:424) 
09-21 15:38:20.721: E/AndroidRuntime(887): at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:136) 
09-21 15:38:20.721: E/AndroidRuntime(887): at android.database.AbstractWindowedCursor.getInt(AbstractWindowedCursor.java:68) 
09-21 15:38:20.721: E/AndroidRuntime(887): at com.database.DBManager.cursorToEvent(DBManager.java:96) 
09-21 15:38:20.721: E/AndroidRuntime(887): at com.database.DBManager.addEvent(DBManager.java:55) 
09-21 15:38:20.721: E/AndroidRuntime(887): at com.database.MainActivity.addClick(MainActivity.java:55) 
09-21 15:38:20.721: E/AndroidRuntime(887): ... 14 more

我MainActivity.java

package com.database; 

import java.util.ArrayList; 

import android.app.Activity; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.View; 
import android.widget.EditText; 
import android.widget.ListView; 

import com.ajay.database.R; 

public class MainActivity extends Activity { 

    private DBManager mEvemanager; 
    private EditText mName; 
    public CustomListAdapter mAdapter; 
    public ArrayList<Event> mEvents; 
    public ListView mListview; 

    public String TAG = "MyActivityTag"; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 

     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     setTitle("Attendance Tracker"); 

     mEvemanager = new DBManager(this); 
     // Log.d(TAG, "Back into main after creating object of eventmanager"); 
     mEvemanager.open(); 

     mEvents = mEvemanager.getallEvents(); 
     // Log.d(TAG, 
     // "Back into main activity after got events from eventmanager"); 

     mAdapter = new CustomListAdapter(MainActivity.this, mEvents); 
     // Log.d(TAG, "Back into main after creating customadapter"); 

     mListview = (ListView) findViewById(R.id.listview); 
     // Log.d(TAG, "listView reference Created"); 

     mListview.setAdapter(mAdapter); 
     // Log.d(TAG, "Adapter Set"); 

    } 

    public void addClick(View view) { 

     Log.d(TAG, "Add button clicked"); 
     Event event = null; 
     mName = (EditText) findViewById(R.id.eventNameText); 
     event = mEvemanager.addEvent(mName.getText().toString()); 
     mAdapter.add(event); 
     mAdapter.notifyDataSetChanged(); 
     mName.setText(null); 

    } 

    @Override 
    protected void onResume() { 
     mEvemanager.open(); 
     super.onResume(); 
    } 

    @Override 
    protected void onPause() { 
     mEvemanager.close(); 
     super.onPause(); 
    } 
}

我DBManager.java

package com.database; 

import java.util.ArrayList; 

import android.content.ContentValues; 
import android.content.Context; 
import android.database.Cursor; 
import android.database.SQLException; 
import android.database.sqlite.SQLiteDatabase; 
import android.util.Log; 

public class DBManager { 

    private SQLiteDatabase mDatabase; 
    private MyDBHandler mDBhandler; 

    private String[] allEvents = { MyDBHandler.COLUMN_ID, 
      MyDBHandler.COLUMN_EVENTNAME }; 

    public static final String TAG = "MyActivityTag"; 

    public DBManager(Context context) { 
     // Log.d(TAG, "Eventmanager constructor called"); 
     mDBhandler = new MyDBHandler(context); 
    } 

    public void open() throws SQLException { 
     mDatabase = mDBhandler.getWritableDatabase(); 
    } 

    public void close() throws SQLException { 
     mDBhandler.close(); 
    } 

    public Event addEvent(String eventname) { 
     Log.d(TAG, "addEvent method in eventmanager"); 

     // ContentValues values = new ContentValues(); 
     // values.put(MyDBHandler.COLUMN_EVENTNAME, eventname); 

     String insertQuery = " INSERT INTO " + MyDBHandler.TABLE_EVENTS + "(" 
       + MyDBHandler.COLUMN_EVENTNAME + ")" + " VALUES (' " 
       + eventname + " ')"; 

     mDatabase.execSQL(insertQuery); 

     // long insertId = mDatabase 
     // .insert(MyDBHandler.TABLE_EVENTS, null, values); 

     Cursor cursor = mDatabase.query(MyDBHandler.TABLE_EVENTS, allEvents, 
       MyDBHandler.COLUMN_ID + " = " + 0, null, null, null, null); 

     cursor.moveToFirst(); 

     Event mEvent = cursorToEvent(cursor); 

     cursor.close(); 
     return mEvent; 
    } 

    public void deleteEvent(String eventname) { 
     Log.d(TAG, "in deleteEvent method eventmanager"); 
     String query = "Select * FROM " + MyDBHandler.TABLE_EVENTS + " WHERE " 
       + MyDBHandler.COLUMN_EVENTNAME + " = \"" + eventname + "\""; 
     SQLiteDatabase db = mDBhandler.getWritableDatabase(); 
     Cursor cursor = db.rawQuery(query, null); 
     Event event = new Event(); 
     if (cursor.moveToFirst()) { 
      event.setID(Integer.parseInt(cursor.getString(0))); 
      db.delete(MyDBHandler.TABLE_EVENTS, MyDBHandler.COLUMN_ID + " = ?", 
        new String[] { String.valueOf(event.getID()) }); 
      cursor.close(); 
     } 
     db.close(); 
    } 

    public ArrayList<Event> getallEvents() { 
     Log.d(TAG, "getallEvents in eventmanager"); 
     ArrayList<Event> events = new ArrayList<Event>(); 

     Cursor cursor = mDatabase.query(MyDBHandler.TABLE_EVENTS, allEvents, 
       null, null, null, null, null); 

     cursor.moveToFirst(); 
     while (!cursor.isAfterLast()) { 
      Event event = cursorToEvent(cursor); 
      events.add(event); 
      cursor.moveToNext(); 
     } 
     cursor.close(); 
     return events; 
    } 

    private Event cursorToEvent(Cursor cursor) { 
     Event event = new Event(); 
     event.setID(cursor.getInt(0)); 
     event.setEventName(cursor.getString(1)); 
     return event; 
    } 
}

和MyDBHandler.java

package com.database; 

import android.content.Context; 
import android.database.sqlite.SQLiteDatabase; 
import android.database.sqlite.SQLiteDatabase.CursorFactory; 
import android.database.sqlite.SQLiteOpenHelper; 
import android.util.Log; 

public class MyDBHandler extends SQLiteOpenHelper { 

    protected static final int DATABASE_VERSION = 1; 
    protected static final String DATABSE_NAME = "eventDB.db"; 
    protected static final String TABLE_EVENTS = "Events"; 

    public static final String COLUMN_ID = "id"; 
    public static final String COLUMN_EVENTNAME = "eventname"; 

    public static final String TAG = "MyActivityTag"; 

    public MyDBHandler(Context context, String name, CursorFactory factory, 
      int version) { 
     super(context, DATABSE_NAME, factory, DATABASE_VERSION); 
    // Log.d(TAG, "MyDBHandler constructor called with 4 arguments"); 
    } 

    public MyDBHandler(Context context) { 
     super(context, DATABSE_NAME, null, DATABASE_VERSION); 
    // Log.d(TAG, "MyDBHandler const called with only context argument"); 
    } 

    @Override 
    public void onCreate(SQLiteDatabase db) { 
     String CREATE_EVENTS_TABLE = " CREATE TABLE " + TABLE_EVENTS + "(" 
       + COLUMN_ID + " INTEGER PRIMARY KEY," + COLUMN_EVENTNAME 
       + " TEXT" + ")"; 
     db.execSQL(CREATE_EVENTS_TABLE); 
     Log.d(TAG, "Table Created in database"); 
    } 

    @Override 
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
     db.execSQL("DROP TABLE IF EXISTS " + TABLE_EVENTS); 
     onCreate(db); 
    } 

}

來源

2013-09-21 AJay

你忘了提及，如果你遇到任何問題這樣做，請發佈錯誤日誌，如果有的話。 –

有人給我-1爲什麼？ – AJay

請給我答案，我真的需要 – AJay

最可能的原因是數據庫中的Event表中沒有ID 0的行。因此你的光標是空的，你得到一個錯誤cursorToEvent

來源

2013-09-21 10:26:06 Henry

比我應該做@亨利？ – AJay

我不知道你想用這個查詢來實現什麼''遊標cursor = mDatabase.query（MyDBHandler.TABLE_EVENTS，allEvents， MyDBHandler.COLUMN_ID +「=」+ 0，null，null，null，null）;'。 – Henry

在Android的INSERT INTO數據庫中

回答

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