程序在我开始在搜索栏中输入时崩溃

Question

当我运行该程序时，一切看起来都不错，但是当我在搜索栏中输入一个字母时，程序立即崩溃。它主要显示LibraryDbAdapter类和searchBar()的{​​{1}}函数的异常在onQueryTextChange(String newText)课程中。我也在使用SearchViewActivity。

LibraryDbAdapter.java

ListView

SearchViewActivity.java

 package com.example.waheed.library;

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

 /**
 * Created by Waheed on 6/30/17.
  */

public class LibraryDbAdapter {

public static final String KEY_ROWID = "rowid";
//public static final String KEY_LIBRARY = "library";
public static final String KEY_BOOKNAME = "bookname";
public static final String KEY_BOOKAUTHOR = "bookauthor";
public static final String KEY_STORENAME = "storename";
public static final String KEY_STOREADDRESS = "storeaddress";
public static final String KEY_STORELAT = "storelat";
public static final String KEY_STORELONG = "storelong";
public static final String KEY_SEARCH = "searchData";

private static final String TAG = "LibraryDbAdapter";
private DatabaseHelper mDbHelper;
private SQLiteDatabase mDb;

private static final String DATABASE_NAME = "LibraryData";
private static final String FTS_VIRTUAL_TABLE = "LibraryInfo";
private static final int DATABASE_VERSION = 1;


//Create a FTS3 Virtual Table for fast searches
private static final String DATABASE_CREATE =
        "CREATE VIRTUAL TABLE " + FTS_VIRTUAL_TABLE + " USING fts3(" +
               // KEY_LIBRARY + "," +
                KEY_BOOKNAME + "," +
                KEY_BOOKAUTHOR + "," +
                KEY_STORENAME + "," +
                KEY_STOREADDRESS + "," +
                KEY_STORELAT + "," +
                KEY_STORELONG + "," +
                KEY_SEARCH + "," +
                " UNIQUE (" + KEY_BOOKNAME + "));";


private final Context mCtx;

private static class DatabaseHelper extends SQLiteOpenHelper {

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


    @Override
    public void onCreate(SQLiteDatabase db) {
        Log.w(TAG, DATABASE_CREATE);
        db.execSQL(DATABASE_CREATE);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        Log.w(TAG, "Upgrading database from version " + oldVersion + " to "
                + newVersion + ", which will destroy all old data");
        db.execSQL("DROP TABLE IF EXISTS " + FTS_VIRTUAL_TABLE);
        onCreate(db);
    }
}

public LibraryDbAdapter(Context ctx) {
    this.mCtx = ctx;
}

public LibraryDbAdapter open() throws SQLException {
    mDbHelper = new DatabaseHelper(mCtx);
    mDb = mDbHelper.getWritableDatabase();
    return this;
}

public void close() {
    if (mDbHelper != null) {
        mDbHelper.close();
    }
}

public long createLibrary( String bookname, String bookauthor, String storename, String storeaddress, String storelat, String storelong) {

    ContentValues initialValues = new ContentValues();
    String searchValue = bookname;

    //initialValues.put(KEY_LIBRARY, library);
    initialValues.put(KEY_BOOKNAME, bookname);
    initialValues.put(KEY_BOOKAUTHOR, bookauthor);
    initialValues.put(KEY_STORENAME, storename);
    initialValues.put(KEY_STOREADDRESS, storeaddress);
    initialValues.put(KEY_STORELAT, storelat);
    initialValues.put(KEY_STORELONG, storelong);
    initialValues.put(KEY_SEARCH, searchValue);

    return mDb.insert(FTS_VIRTUAL_TABLE, null, initialValues);
}

public Cursor searchBook(String inputText) throws SQLException {
    Log.w(TAG, inputText);
    String query = "SELECT " +

            KEY_BOOKNAME +

            " from " + FTS_VIRTUAL_TABLE +
            " where " + KEY_SEARCH + " MATCH '" + inputText + "';";
    Log.w(TAG, query);
    Cursor mCursor = mDb.rawQuery(query, null);

    if (mCursor != null) {
        mCursor.moveToFirst();
    }
    return mCursor;

}

public boolean deleteAllLibrary() {

    int doneDelete = 0;
    doneDelete = mDb.delete(FTS_VIRTUAL_TABLE, null, null);
    Log.w(TAG, Integer.toString(doneDelete));
    return doneDelete > 0;

}


}