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我尝试运行“ getItem()”方法

公共类PhoneDal扩展了SQLiteOpenHelper {

// Database Version
private static final int DATABASE_VERSION = 1;
// Database Name
private static final String DATABASE_NAME = Constants.DB_NAME;

private static final String BLOCKED_PHONES_TABLE = "BLOCKED_PHONES_TABLE";
private static final String COMMENTS_TABLE = "COMMENTS_TABLE";

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

@Override
public void onCreate(SQLiteDatabase db) {
    // SQL statement to create book table

    String CREATE_BLOCKED_PHONES_TABLE = "CREATE TABLE "
            + BLOCKED_PHONES_TABLE + " ( "
            + KEY_ID+" INTEGER PRIMARY KEY AUTOINCREMENT, " …