Android Studio SQLite错误:“0”;没有这样的专栏……”;
当我的应用程序创建数据库时,它似乎没有创建“cardname”列。我一直在查看我的代码,但找不到我做错了什么。有人能帮我吗 DBAdapter类Android Studio SQLite错误:“0”;没有这样的专栏……”;,android,sqlite,Android,Sqlite,当我的应用程序创建数据库时,它似乎没有创建“cardname”列。我一直在查看我的代码,但找不到我做错了什么。有人能帮我吗 DBAdapter类 public class DBAdapter { static final String KEY_ROWID = "_id"; static final String KEY_USERNAME = "name"; static final String KEY_PASSWORD = "password"; static final String KEY
public class DBAdapter {
static final String KEY_ROWID = "_id";
static final String KEY_USERNAME = "name";
static final String KEY_PASSWORD = "password";
static final String KEY_CARDNUM = "cardnum";
static final String KEY_CARDNAME = "cardname";
static final String TAG = "DBAdapter";
static final String DATABASE_NAME = "CPDB";
static final String DATABASE_TABLE = "Users";
static final int DATABASE_VERSION = 1;
static final String DATABASE_CREATE =
"create table Users (_id integer primary key autoincrement, "
+ "name text not null,"
+"password text not null,"
+"cardnum text not null,"
+ "cardname text not null"
+ ");";
final Context context;
DatabaseHelper DBHelper;
SQLiteDatabase db;
public DBAdapter (Context ctx){
this.context = ctx;
DBHelper = new DatabaseHelper(context);
}
private static class DatabaseHelper extends SQLiteOpenHelper
{
DatabaseHelper(Context context){
super (context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db){
try{
db.execSQL(DATABASE_CREATE);
} catch (SQLException e) {
e.printStackTrace();
}
}
@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 Users");
onCreate (db);
}
}
DBAdapter类内的查询
//--retrieves cards for the user--
public Cursor getCards(String username) throws SQLException{
Cursor mCursor =
db.query(true, DATABASE_TABLE, new String[] {KEY_ROWID, KEY_USERNAME, KEY_CARDNAME}, KEY_USERNAME + "= '" + username + "'", null, null, null, null,null);
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
主要活动类(发生错误时)
if (view.getId() == R.id.bttn_show)
{
EditText username = (EditText) findViewById(R.id.tf_username);
String tesco = "tesco";
DBAdapter db= new DBAdapter(this);
db.open();
Cursor c = db.getCards(username.getText().toString());
ArrayList<String> usersCards = new ArrayList<>();
if(c.moveToFirst()) {
do {
String aCard = c.getString(c.getColumnIndex("cardname"));
usersCards.add(aCard);
} while (c.moveToNext());
}
if (usersCards.contains(tesco)) {
ImageButton tb1 = (ImageButton) findViewById(R.id.ib_1);
tb1.setBackgroundResource(R.drawable.tesco);
}
else {
Toast.makeText(this, "Please Add a Card", Toast.LENGTH_LONG).show();
}
}
if(view.getId()==R.id.bttn\u show)
{
EditText用户名=(EditText)findViewById(R.id.tf_用户名);
字符串tesco=“tesco”;
DBAdapter db=新的DBAdapter(此);
db.open();
游标c=db.getCards(username.getText().toString());
ArrayList usersCards=新的ArrayList();
if(c.moveToFirst()){
做{
字符串aCard=c.getString(c.getColumnIndex(“cardname”);
usersCards.add(aCard);
}而(c.moveToNext());
}
if(usersCards.contains(特易购)){
ImageButton tb1=(ImageButton)findViewById(R.id.ib_1);
tb1.挫折资源(R.drawable.tesco);
}
否则{
Toast.makeText(这是“请添加一张卡片”,Toast.LENGTH_LONG.show();
}
}
Logcat错误日志
--------- beginning of crash
02-07 13:13:08.100 2109-2109/com.cardpocket.cardpocket E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.cardpocket.cardpocket, PID: 2109
java.lang.IllegalStateException: Could not execute method of the activity
at android.view.View$1.onClick(View.java:4007)
at android.view.View.performClick(View.java:4756)
at android.view.View$PerformClick.run(View.java:19749)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at android.view.View$1.onClick(View.java:4002)
at android.view.View.performClick(View.java:4756)
at android.view.View$PerformClick.run(View.java:19749)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: android.database.sqlite.SQLiteException: no such column: cardname (code 1): , while compiling: SELECT DISTINCT _id, name, cardname FROM Users WHERE name= 'cliff'
at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnecti on.java:889)
at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:500)
at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
at android.database.sqlite.SQLiteProgram.<init> (SQLiteProgram.java:58)
at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver. java:44)
at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1316)
at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1163)
at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1034)
at com.cardpocket.cardpocket.DBAdapter.getCards(DBAdapter.java:148)
at com.cardpocket.cardpocket.mainactivity.onClick(mainactivity.java:78)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at android.view.View$1.onClick(View.java:4002)
at android.view.View.performClick(View.java:4756)
at android.view.View$PerformClick.run(View.java:19749)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
-----------崩溃开始
02-07 13:13:08.100 2109-2109/com.cardpocket.cardpocket E/AndroidRuntime﹕ 致命异常:主
进程:com.cardpocket.cardpocket,PID:2109
java.lang.IllegalStateException:无法执行活动的方法
在android.view.view$1.onClick上(view.java:4007)
在android.view.view.performClick上(view.java:4756)
在android.view.view$PerformClick.run(view.java:19749)
位于android.os.Handler.handleCallback(Handler.java:739)
位于android.os.Handler.dispatchMessage(Handler.java:95)
位于android.os.Looper.loop(Looper.java:135)
位于android.app.ActivityThread.main(ActivityThread.java:5221)
位于java.lang.reflect.Method.invoke(本机方法)
位于java.lang.reflect.Method.invoke(Method.java:372)
在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)上
位于com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
原因:java.lang.reflect.InvocationTargetException
位于java.lang.reflect.Method.invoke(本机方法)
位于java.lang.reflect.Method.invoke(Method.java:372)
在android.view.view$1.onClick上(view.java:4002)
在android.view.view.performClick上(view.java:4756)
在android.view.view$PerformClick.run(view.java:19749)
位于android.os.Handler.handleCallback(Handler.java:739)
位于android.os.Handler.dispatchMessage(Handler.java:95)
位于android.os.Looper.loop(Looper.java:135)
位于android.app.ActivityThread.main(ActivityThread.java:5221)
位于java.lang.reflect.Method.invoke(本机方法)
位于java.lang.reflect.Method.invoke(Method.java:372)
在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)上
位于com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
原因:android.database.sqlite.SQLiteException:没有这样的列:cardname(代码1):,编译时:从name='cliff'的用户中选择DISTINCT _id,name,cardname
位于android.database.sqlite.SQLiteConnection.nativePrepareStatement(本机方法)
位于android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection on.java:889)
位于android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:500)
位于android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
在android.database.sqlite.sqlite程序中。(SQLiteProgram.java:58)
位于android.database.sqlite.SQLiteQuery(SQLiteQuery.java:37)
位于android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44)
位于android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1316)
位于android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1163)
位于android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1034)
在com.cardpocket.cardpocket.DBAdapter.getCards上(DBAdapter.java:148)
位于com.cardpocket.cardpocket.mainactivity.onClick(mainactivity.java:78)
位于java.lang.reflect.Method.invoke(本机方法)
位于java.lang.reflect.Method.invoke(Method.java:372)
在android.view.view$1.onClick上(view.java:4002)
在android.view.view.performClick上(view.java:4756)
在android.view.view$PerformClick.run(view.java:19749)
位于android.os.Handler.handleCallback(Handler.java:739)
位于android.os.Handler.dispatchMessage(Handler.java:95)
位于android.os.Looper.loop(Looper.java:135)
位于android.app.ActivityThread.main(ActivityThread.java:5221)
位于java.lang.reflect.Method.invoke(本机方法)
位于java.lang.reflect.Method.invoke(Method.java:372)
在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)上
位于com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
提前感谢。您似乎正在尝试获取未在DBAdapter类中创建的cardesc列。你能发布更多的logcat日志吗?表中是否有一条名为“tesco”的记录
将乐购插入表格后,尝试搜索乐购。请发布更多代码?更新dabase版本11您是否在您的
密钥卡名中使用了正确的列名?ved是什么意思?很抱歉,这是ol提供的