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Android開發似乎對我而言是一種錯誤的禍害，所以我再次回答一個問題。 我創建通過的SQLite數據庫連接，但我收到以下錯誤：Android：SQLite數據庫「沒有這樣的表存在」
(1) no such table: TABLE_NAME
我試圖重新安裝我的應用程序，重命名.db文件的應用程序能夠創建和其他一些方法，我發現在線，但沒有工作。總的來說，我一直堅持這幾天。
我的代碼：
MainActivity
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setGlobalContext(this);
SQL = new SQLLib(this);
Button LoginBtn = (Button)findViewById(R.id.login_btn);
LoginBtn.setOnClickListener(this);
Button RegisterBtn = (Button)findViewById(R.id.register_btn);
RegisterBtn.setOnClickListener(this);
newTab("Tag1", R.id.login, "Login");
newTab("Tag2", R.id.newitem, "Nieuw");
newTab("Tag3", R.id.viewitems, "Overzicht");
getTabHost().setCurrentTab(0);
hideTab(1);
hideTab(2);
}
登錄功能 - 連接到LoginBtn
public void Login(){
if(Username.replaceAll(" ", "") != "" && Password.replaceAll(" ", "") != ""){
if(SQL.SelectString("SELECT PASSWORD FROM USERLOGIN WHERE USERNAME = '"+Username+"'") == Password){
Message("Login");
}else{
Message(SQL.SelectString("SELECT PASSWORD FROM USERLOGIN WHERE USERNAME = '"+Username+"'")+", "+Password);
}
}else{
Message("Not all data is inserted. Try again!");
}
}
註冊功能 - 連接到RegisterBtn
public void Register(){
if(Username.replaceAll(" ", "") != "" && Password.replaceAll(" ", "") != ""){
if(SQL.SelectString("SELECT USERNAME FROM USERLOGIN WHERE USERNAME = '" + Username+"'") == ""){
SQL.Insert("USERLOGIN", new String[]{"USERNAME", "PASSWORD"}, new String[]{"\""+Username+"\"", "\""+Password+"\""});
}else{
Message("User'"+Username+"' already exists!");
}
}else{
Message("Not all data is inserted. Try again!");
}
}
SQLLIB
private static final String DATABASE_NAME = "pwmanagement.db";
private static final int DATABASE_VERSION = 1;
public SQLLib(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.rawQuery("CREATE TABLE userlogin (_id INTEGER PRIMARY KEY AUTOINCREMENT, USERNAME TEXT, PASSWORD TEXT);", null);
db.rawQuery("CREATE TABLE passwords (_id INTEGER PRIMARY KEY AUTOINCREMENT, USERLOGIN INTEGER, USERNAME TEXT, PASSWORD TEXT);", null);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
public void Insert(String table, String[] columns, String[] contents){
SQLiteDatabase db = this.getWritableDatabase();
if(columns.length == contents.length){
ContentValues values = new ContentValues();
for(int i = 0; i < contents.length; i++){
values.put(columns[i], contents[i]);
}
db.insert(table, null, values);
}
db.close();
}
public String SelectString(String query){
SQLiteDatabase db = this.getReadableDatabase();
String s = "";
Cursor cursor;
cursor = db.rawQuery(query, null);
while(cursor.moveToNext()){
s = cursor.getString(0);
}
db.close();
return s.replaceAll(" ", "");
}
完全錯誤
09-02 17:28:23.485: E/SQLiteLog(7569): (1) no such table: USERLOGIN
09-02 17:28:23.495: E/AndroidRuntime(7569): FATAL EXCEPTION: main
09-02 17:28:23.495: E/AndroidRuntime(7569): Process: com.example.password, PID: 7569
09-02 17:28:23.495: E/AndroidRuntime(7569): android.database.sqlite.SQLiteException: no such table: USERLOGIN (code 1): , while compiling: SELECT USERNAME FROM USERLOGIN WHERE USERNAME = 'steven'
09-02 17:28:23.495: E/AndroidRuntime(7569): at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
09-02 17:28:23.495: E/AndroidRuntime(7569): at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:923)
09-02 17:28:23.495: E/AndroidRuntime(7569): at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:534)
09-02 17:28:23.495: E/AndroidRuntime(7569): at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
09-02 17:28:23.495: E/AndroidRuntime(7569): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
09-02 17:28:23.495: E/AndroidRuntime(7569): at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
09-02 17:28:23.495: E/AndroidRuntime(7569): at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:65)
09-02 17:28:23.495: E/AndroidRuntime(7569): at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1370)
09-02 17:28:23.495: E/AndroidRuntime(7569): at android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1309)
09-02 17:28:23.495: E/AndroidRuntime(7569): at com.example.password.SQLLib.SelectString(SQLLib.java:62)
09-02 17:28:23.495: E/AndroidRuntime(7569): at com.example.password.MainActivity.Register(MainActivity.java:85)
09-02 17:28:23.495: E/AndroidRuntime(7569): at com.example.password.MainActivity.onClick(MainActivity.java:50)
09-02 17:28:23.495: E/AndroidRuntime(7569): at android.view.View.performClick(View.java:4470)
09-02 17:28:23.495: E/AndroidRuntime(7569): at android.view.View$PerformClick.run(View.java:18593)
09-02 17:28:23.495: E/AndroidRuntime(7569): at android.os.Handler.handleCallback(Handler.java:733)
09-02 17:28:23.495: E/AndroidRuntime(7569): at android.os.Handler.dispatchMessage(Handler.java:95)
09-02 17:28:23.495: E/AndroidRuntime(7569): at android.os.Looper.loop(Looper.java:157)
09-02 17:28:23.495: E/AndroidRuntime(7569): at android.app.ActivityThread.main(ActivityThread.java:5867)
09-02 17:28:23.495: E/AndroidRuntime(7569): at java.lang.reflect.Method.invokeNative(Native Method)
09-02 17:28:23.495: E/AndroidRuntime(7569): at java.lang.reflect.Method.invoke(Method.java:515)
09-02 17:28:23.495: E/AndroidRuntime(7569): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
09-02 17:28:23.495: E/AndroidRuntime(7569): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:674)
09-02 17:28:23.495: E/AndroidRuntime(7569): at dalvik.system.NativeStart.main(Native Method)
的logcat的所以，我的問題是： 哪裏是哪裏來的這個錯誤，我該如何解決？我遵循我在網上找到的步驟，甚至在我擁有的書籍中。
執行對不起我，而我去感覺像一個doofus。謝謝你，弗蘭克。 – Zubaja 2014-09-02 16:43:05
不管。我們不是出生「已經學會」。 – 2014-09-02 16:45:20