Question

我是android的初学者，我在向表中插入数据时遇到问题。问题已被多次询问，但我无法理解问题的根源及其解决方案。

public long insertRegisterData(RegisterData data) throws SQLException {
    ContentValues cv = new ContentValues();

    cv.put("u_name", data.getU_name());
    cv.put("u_address", data.getU_address());
    cv.put("tel_office", data.getTel_office());
    cv.put("tel_resi", data.getTel_resi());
    cv.put("tel_req", data.getTel_req());
    cv.put("tel_fax", data.getTel_fax());
    cv.put("dateSanad", data.getDateSanad());
    cv.put("memBarCounWelfare", data.getMemBarCounWelfare());
    cv.put("prof_tax", data.getProf_tax());
    cv.put("pan", data.getPan());
    cv.put("drivingPolicyNo", data.getDrivingPolicyNo());
    cv.put("drivingPolicyDue", data.getDrivingPolicyDue());
    cv.put("bankAcc", data.getBankAcc());
    cv.put("passport", data.getPassport());
    cv.put("blood", data.getBlood());
    cv.put("docName", data.getDocName());
    cv.put("docPhone", data.getDocPhone());
    cv.put("docAddress", data.getDocAddress());

    System.out.println("Comntent vlaues     " + cv.get("u_name"));
    return sqLiteDatabase.insert("Registration1", null, cv);

}



public void onCreate(SQLiteDatabase db) {
    db.execSQL("Create table newRecord(prev_date  text,CaseName text,caseNo                                   Text,forParty text,againstParty text,stages text)");
    db.execSQL("Create table Registration1(u_name text,u_address text,tel_office text,tel_resi text,tel_req text,tel_fax text,dateSanad text,memBarCounWelfare text,prof_tax text,pan text,drivingPolicyNo text,drivingPolicyDue text,bankAcc text,passport text,blood text,docName text,docPhone text,docAddress text)");
}

在printstackTrace中

02-18 02:08:35.362: E/Database(3622): Error inserting docName=H memBarCounWelfare=Download  prof_tax=D drivingPolicyNo=X docAddress=sachin tel_req=Dd blood=G tel_resi=D dateSanad=D tel_office= pan=null drivingPolicyDue=Dddsdfdssd dfg d tel_fax=D u_address=s bankAcc=D docPhone=99 passport=D u_name=S
02-18 02:08:35.362: E/Database(3622): android.database.sqlite.SQLiteException: no such table: Registration1: , while compiling: INSERT INTO Registration1(docName, memBarCounWelfare, prof_tax, drivingPolicyNo, docAddress, tel_req, blood, tel_resi, dateSanad, tel_office, pan, drivingPolicyDue, tel_fax, u_address, bankAcc, docPhone, passport, u_name) VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?);
02-18 02:08:35.362: E/Database(3622):   at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method)
02-18 02:08:35.362: E/Database(3622):   at android.database.sqlite.SQLiteCompiledSql.compile(SQLiteCompiledSql.java:92)
02-18 02:08:35.362: E/Database(3622):   at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:65)
02-18 02:08:35.362: E/Database(3622):   at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:83)
02-18 02:08:35.362: E/Database(3622):   at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:41)
02-18 02:08:35.362: E/Database(3622):   at android.database.sqlite.SQLiteDatabase.compileStatement(SQLiteDatabase.java:1149)
02-18 02:08:35.362: E/Database(3622):   at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1569)
02-18 02:08:35.362: E/Database(3622):   at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1426)
02-18 02:08:35.362: E/Database(3622):   at com.database.SQLiteAdapter.insertRegisterData(SQLiteAdapter.java:116)
02-18 02:08:35.362: E/Database(3622):   at com.diary.OneTimePassword$1.onClick(OneTimePassword.java:107)
02-18 02:08:35.362: E/Database(3622):   at android.view.View.performClick(View.java:2485)
02-18 02:08:35.362: E/Database(3622):   at android.view.View$PerformClick.run(View.java:9080)
02-18 02:08:35.362: E/Database(3622):   at android.os.Handler.handleCallback(Handler.java:587)
02-18 02:08:35.362: E/Database(3622):   at android.os.Handler.dispatchMessage(Handler.java:92)
02-18 02:08:35.362: E/Database(3622):   at android.os.Looper.loop(Looper.java:123)
02-18 02:08:35.362: E/Database(3622):   at android.app.ActivityThread.main(ActivityThread.java:3683)
02-18 02:08:35.362: E/Database(3622):   at java.lang.reflect.Method.invokeNative(Native Method)
02-18 02:08:35.362: E/Database(3622):   at java.lang.reflect.Method.invoke(Method.java:507)
02-18 02:08:35.362: E/Database(3622):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
02-18 02:08:35.362: E/Database(3622):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
02-18 02:08:35.362: E/Database(3622):   at dalvik.system.NativeStart.main(Native Method)

Answer 1

错误的根本原因可以在这里找到：

android.database.sqlite.SQLiteException: **no such table: Registration1**: , while compiling: INSERT INTO Registration1(docName, memBarCounWelfare, prof_tax, drivingPolicyNo, docAddress, tel_req, blood, tel_resi, dateSanad, tel_office, pan, drivingPolicyDue, tel_fax, u_address, bankAcc, docPhone, passport, u_name) VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?);

CREATE TABLE Registration1语句失败或未被调用。您可以尝试在onCreate()中设置断点或插入日志语句，并确保您到达那里。您还可以使用execSQL()围绕try / catch (SQLException e)来电，看看是否有SQLException被抛出。

Answer 2

问题是您的表 Registration1 不存在。如果数据库不存在，则调用方法onCreate，这意味着您的数据库是在第一次运行程序时创建的，但如果稍后您添加了第二个表 Registration1 ，则该表将不要被创造。

您需要覆盖数据库Helper类中的onUpgrade（您可以简单地删除表并调用onCreate（）），并且下次运行您的程序时，您需要增加版本号。 SQLiteOpenHelper构造函数。运行程序时，运行时会将您指定的版本与已存储的版本进行比较，如果它们不同，则运行时会调用onUpgrade。

编辑：
以下是两个示例，第一个示例更改现有表。第二个示例重新创建表（删除所有以前的数据）。

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
{
    if (oldVersion<2)
    {
        // Example of altering the table
        db.execSQL("ALTER TABLE " + myTable + " ADD COLUMN " + newColumn + " int;");
    }
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
{
    // Delete and create table
    db.execSQL("DROP TABLE " + myTable + " ;");
    onCreate(db);
}

无法将数据插入SQlite表

2 个答案: