android studio autocompletetextview
时间: 2023-09-12 19:03:27 浏览: 49
AutocompleteTextView is a subclass of EditText view in Android that shows suggestions automatically while the user is typing. It is commonly used in search functionalities and other similar scenarios.
To use AutocompleteTextView in Android Studio, you first need to add the AutoCompleteTextView to your layout XML file. Here's an example:
```
<AutoCompleteTextView
android:id="@+id/autoCompleteTextView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Enter a city name"
android:textColorHint="#999"
android:completionThreshold="1"
android:popupBackground="@color/white"
android:dropDownVerticalOffset="10dp"
android:elevation="2dp"/>
```
In the above example, `completionThreshold` attribute specifies the minimum number of characters required to trigger the suggestion popup. `popupBackground` attribute specifies the background color of the suggestion popup, and `dropDownVerticalOffset` attribute specifies the vertical offset of the suggestion popup.
To provide suggestions to the AutocompleteTextView, you need to set an adapter that provides data to the suggestion popup. Here's an example:
```
AutoCompleteTextView autoCompleteTextView = findViewById(R.id.autoCompleteTextView);
String[] cities = {"New York", "Los Angeles", "Chicago", "Houston", "Philadelphia", "Phoenix", "San Antonio", "San Diego", "Dallas", "San Jose"};
ArrayAdapter<String> adapter = new ArrayAdapter<>(this, android.R.layout.simple_dropdown_item_1line, cities);
autoCompleteTextView.setAdapter(adapter);
```
In the above example, we create an array of cities and provide it to the ArrayAdapter, which then sets the adapter to the AutocompleteTextView. Now, when the user types in the AutocompleteTextView, it will show suggestions based on the provided data.