android autocomplete textview

Question

i have a autocomplete textview ,this autocomplete texview sometimes automatically pop up in another view? ` android:maxLength="50"

                />`<AutoCompleteTextView 
                    android:hint="Enter provider's name" 
                    android:id="@+id/Edit_Provider" 
                         android:singleLine="true"
                    android:layout_height="wrap_content"
                    android:scrollHorizontally="true"
                    android:layout_width="250dp"    
                    android:maxLength="50"

                />

ArrayAdapter arrAdapterProviderPhoneNo = new ArrayAdapter(User.context,android.R.layout.simple_dropdown_item_1line, phoneContactName); ProviderName.setThreshold(0); ProviderName.setAdapter(arrAdapterProviderPhoneNo);