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我的问题是,我不能使用游标从数据库检索的数据,并在所有情况下的SQLite将引发异常SQLite和光标
db.execSQL("CREATE TABLE BOOKS ("
+ "_ID INTEGER PRIMARY KEY AUTOINCREMENT, "
+ "Name TEXT, "
+ "Sub_Field TEXT, "
+ "Cover INTEGER, "
+ "Priority INTEGER);");
ContentValues BookValue = new ContentValues();
BookValue.put("Name", "Cisco");
BookValue.put("Sub_Field", "Net");
BookValue.put("Cover", R.drawable.cappuccino);
BookValue.put("Priority", 1);
db.insert("BOOKS", null, BookValue);
MainActivity:
try {
SQLiteOpenHelper myDatabase = new myDatabase(this);
db = myDatabase.getWritableDatabase();
myText = (TextView) findViewById(R.id.txt);
cursor = db.query("BOOK", new String[] {"Name", "Sub_Field"}, null,null, null, null,null);
if (cursor != null) {
cursor.moveToFirst();
String name = cursor.getString(0);
myText.setText(name);
}
} catch (SQLiteException e) {
myText = (TextView) findViewById(R.id.txt);
myText.setText("Try Again, you're soon to achieve your Goal...");
myText.setTextSize(20);
}
添加你的正在发生的问题plz –
'Slqite异常错误'意味着你有一些SQLite的问题。有关更多信息,您应该阅读错误消息和堆栈跟踪。 –
错误是什么?尝试添加'Log.d(“TAG”,“exception =”+ e.toString());'在catch(SQLiteException e){}'中记录错误。 –