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 plain copy

<LinearLayoutxmlns: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">
<LinearLayoutandroid: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"/>
<AutoCompleteTextViewandroid:id="@+id/autoText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
<LinearLayoutandroid: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"/>
<MultiAutoCompleteTextViewandroid:id="@+id/autoMultiText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
</LinearLayout>

[java] view plain copy

packagecom.light.android.study;
importandroid.app.Activity;
importandroid.os.Bundle;
importandroid.view.Gravity;
importandroid.view.View;
importandroid.view.View.OnClickListener;
importandroid.widget.ArrayAdapter;
importandroid.widget.AutoCompleteTextView;
importandroid.widget.CheckBox;
importandroid.widget.CompoundButton;
importandroid.widget.MultiAutoCompleteTextView;
importandroid.widget.MultiAutoCompleteTextView.CommaTokenizer;
importandroid.widget.RadioGroup;
importandroid.widget.RadioGroup.OnCheckedChangeListener;
importandroid.widget.Toast;
importandroid.widget.ToggleButton;
publicclassMainActivityextendsActivity{
privateAutoCompleteTextViewautoText;
privateMultiAutoCompleteTextViewautoMultiText;
privateString[]keywords={
"ab","abc","abdfdf","abnsd","abdfff"
};
@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
initAdapter();
}
privatevoidinit(){
autoText=(AutoCompleteTextView)findViewById(R.id.autoText);
autoMultiText=(MultiAutoCompleteTextView)findViewById(R.id.autoMultiText);
}
privatevoidinitAdapter(){
ArrayAdapter<String>adapter=newArrayAdapter<String>(this,android.R.layout.simple_dropdown_item_1line,keywords);
autoText.setAdapter(adapter);
autoMultiText.setAdapter(adapter);
autoMultiText.setTokenizer(newMultiAutoCompleteTextView.CommaTokenizer());
}
}

效果：

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