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Sudo248
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Jul 29, 2022
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Bài của em ổn đấy, đúng và đủ, chỉ là chú ý trên fragment cái gì do tạo sẵn mà không dùng thì xóa đi.
id của view thì thêm tiền tố là tag của view đó
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| class MainActivity : AppCompatActivity() { | ||
| private var fragmentManager: FragmentManager? = null | ||
| private var fragmentTransaction: FragmentTransaction? = null |
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Không cần thiết phải tạo 2 biến này vì mạc định activity đã có rồi
| tools:context=".SecondActivity"> | ||
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| <EditText | ||
| android:id="@+id/username" |
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thêm tiền tố là tên của tag vd edtUsername
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