【移動應(yīng)用開發(fā)技術(shù)】Android自動補全提示

【移動應(yīng)用開發(fā)技術(shù)】Android自動補全提示

自動補全提示最主要的是使用AutoCompleteTextView控件，繼而從與控件關(guān)聯(lián)的ArrayAdapter提供的字符串集合得到提示。

先上圖AutoCompleteTextViewActivity.java代碼如下：public

class

AutoCompleteTextViewActivity

extends

Activity

{

@Override

protected

void

onCreate(Bundle

savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.autocomplete);

setTitle("AutoCompleteTextView_Activity");

ArrayAdapter<String>

adapter

=

new

ArrayAdapter<String>(

this,

android.R.layout.simple_dropdown_item_1line,

COUNTRIES);//第2個參數(shù)是每個item的顯示樣式，第3個參數(shù)為提供數(shù)據(jù)的數(shù)組名

AutoCompleteTextView

autotextView

=

(AutoCompleteTextView)

findViewById(R.id.auto_complete);

autotextView.setAdapter(adapter);//將adapter適配器添加到auto..對象中

autotextView.setThreshold(1);//設(shè)置輸入幾個字母開始關(guān)聯(lián)，默認(rèn)是2(threshole:入口，門檻，臨界值)

}

static

final

String[]

COUNTRIES

=

new

String[]

{

//設(shè)置數(shù)據(jù)源

"China"

,"Russia",

"Germany","Ukraine",

"Belarus",

"USA"

,"China1"

,"China12",

"Germany1",

"Russia2",

"Belarus1",

"USA1"

};

}layout中XML文件如下：<?xml

version="1.0"

encoding="utf-8"?>

<LinearLayout

xmlns:android="/apk/res/android"

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="wrap_content">

<AutoCompleteTextView

android:id="@+id/auto_complete"

android:layout_width="fill_parent"

android:layout_height="wrap_content"/>

</LinearLayout>當(dāng)然，為了以后修改數(shù)據(jù)源及代碼的方便，建議將數(shù)據(jù)添加到在layout下的strings.xml文件中去<?xml

version="1.0"

encoding="utf-8"?>

<resources>

<string-array

name="countries_array">

<item>China</item>

<item>China1</item>

<item>China12</item>

</string-array>

</resources>再將原先的數(shù)據(jù)源修改為如下即可String[]

COUN