Android用户界面 UI组件-自动提示输入框 AutoCompleteTextView跟MultiAutoCompleteTextView_Android

Android用户界面 UI组件--自动提示输入框 AutoCompleteTextView和MultiAutoCompleteTextView

AutoCompleteTextView: 就是一个带自动提示的EditText,当输入字符时,会出现提示.
android:completionThreshold?
输入几个字符时提示
android:completionHint/setCompletionHint(CharSequence)
设置出现下拉列表的提示标题
android:dropDownHeight/setDropHeight(int)
设置下拉列表的高度
android:dropDownWidth/setDropWidth(int)
设置下拉列表的宽度
android:popupBackground/setDropDownbackgroundResource(int)
设置下拉列表的背景
在Android程序中,为了展示数据,通常会用到一个Adapter的接口
setAdapter()设置提示内容的Adapter.

MultiAutoCompleteTextView是多选选项
使用MultiAutoCompleteTextView必须实现MultiAutoCompleteTextView.Tokenizer接口
用于声明用于选项与选项之间分隔的符号,一般如不特殊指定,可以使用Android为我们提供的实现类MultiAutoCompleteTextView.CommaTokenizer,它设定使用英文逗号","进行分隔选项.

例子：

[java]?view plaincopy?
<LinearLayout?xmlns:android="http://schemas.android.com/apk/res/android"??
????xmlns:tools="http://schemas.android.com/tools"??
????android:layout_width="match_parent"??
????android:layout_height="match_parent"??
????android:orientation="vertical"??
????tools:context=".MainActivity"?>??
??????
????<LinearLayout?android:layout_width="match_parent"??
??????????????????android:layout_height="wrap_content"??
??????????????????android:orientation="horizontal">??
??????
????<TextView??
????????android:layout_width="wrap_content"??
????????android:layout_height="wrap_content"??
????????android:text="单选搜索"??
????????tools:ignore="HardcodedText"?/>??
??
????<AutoCompleteTextView?android:id="@+id/autoText"??
??????????????????????????android:layout_width="match_parent"??
??????????????????????????android:layout_height="wrap_content"??
??????????????????????????/>??
??????
???</LinearLayout>??
???<LinearLayout?android:layout_width="match_parent"??
??????????????????android:layout_height="wrap_content">??
????<TextView??
????????android:layout_width="wrap_content"??
????????android:layout_height="wrap_content"??
????????android:text="多选搜索"??
????????tools:ignore="HardcodedText"?/>??
??????
???<MultiAutoCompleteTextView?android:id="@+id/autoMultiText"??
??????????????????????????????android:layout_width="match_parent"??
??????????????????????????????android:layout_height="wrap_content"??
??????????????????????????????/>??
??</LinearLayout>??
?????
??
</LinearLayout>??

[java]?view plaincopy?
package?com.light.android.study;??
??
import?android.app.Activity;??
import?android.os.Bundle;??
import?android.view.Gravity;??
import?android.view.View;??
import?android.view.View.OnClickListener;??
import?android.widget.ArrayAdapter;??
import?android.widget.AutoCompleteTextView;??
import?android.widget.CheckBox;??
import?android.widget.CompoundButton;??
import?android.widget.MultiAutoCompleteTextView;??
import?android.widget.MultiAutoCompleteTextView.CommaTokenizer;??
import?android.widget.RadioGroup;??
import?android.widget.RadioGroup.OnCheckedChangeListener;??
import?android.widget.Toast;??
import?android.widget.ToggleButton;??
??
public?class?MainActivity?extends?Activity?{??
??
????private?AutoCompleteTextView?autoText;??
????private?MultiAutoCompleteTextView?autoMultiText;??
????private?String[]?keywords?=?{??
????????????"ab","abc","abdfdf","abnsd","abdfff"??
????};??
????@Override??
????protected?void?onCreate(Bundle?savedInstanceState)?{??
????????super.onCreate(savedInstanceState);??
????????setContentView(R.layout.activity_main);??
????????init();??
????????initAdapter();??
????}??
??????
????private?void?init(){??
????????autoText?=?(AutoCompleteTextView)?findViewById(R.id.autoText);??
????????autoMultiText?=?(MultiAutoCompleteTextView)?findViewById(R.id.autoMultiText);??
????}??
??????
????private?void?initAdapter(){??
????????ArrayAdapter<String>?adapter?=?new?ArrayAdapter<String>(this,?android.R.layout.simple_dropdown_item_1line,?keywords);??
????????autoText.setAdapter(adapter);??
????????autoMultiText.setAdapter(adapter);??
????????autoMultiText.setTokenizer(new?MultiAutoCompleteTextView.CommaTokenizer());??
????}??
??????
??
}??

效果：