Android基礎篇之AutoCompleteTextView

 2011-04-25 11:00:04

    AutoCompleteTextView 是Android中輸入提示框 雖然現在的輸入法越來越強大，但還是讓用戶輸入越方便越好

下面來看看代碼

1.在main.xml中創建一個 AutoCompleteTextView 佈局

 

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" android:padding="5dp"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Country: " /> <AutoCompleteTextView android:id="@+id/autocomplete_country" android:layout_width="fill_parent" android:layout_height="wrap_content" android:completionThreshold="1" android:layout_marginLeft="5dp"/> <!-- android默認的是至少輸入2個字符才顯示提示 ， android:completionThreshold 用來可以修改默認值 --> </LinearLayout>

 

 

 

2.爲 AutoCompleteTextView 中的數據提供佈局res/item_list.xml

<?xml version="1.0" encoding="utf-8"?> <TextView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:padding="10dp" android:textSize="16sp" android:textColor="#000"> </TextView>

 

3.AutoCompleteText.java

package com.yin; import android.app.Activity; import android.os.Bundle; import android.widget.ArrayAdapter; import android.widget.AutoCompleteTextView; public class AutoCompleteText extends Activity { private static String[] COUNTRIES = {"Afghanistan", "Albania", "Algeria", "American Samoa", "Andorra", "Angola", "Anguilla", "Antarctica", "Antigua and Barbuda", "Argentina", "Armenia", "Aruba", "Australia", "Austria", "Azerbaijan", "Bahrain", "Bangladesh", "Barbados", "Belarus", "Belgium", "Belize", "Benin", "Bermuda", "Bhutan", "Bolivia", "Bosnia and Herzegovina", "Botswana", "Bouvet Island", "Brazil", "British Indian Ocean Territory", "British Virgin Islands", "Brunei", "Bulgaria", "Burkina Faso", "Burundi", "Cote d'Ivoire", "Cambodia", "Cameroon", "Canada", "Cape Verde", "Cayman Islands", "Central African Republic", "Chad", "Chile", "China", "Christmas Island", "Cocos (Keeling) Islands", "Colombia", "Comoros", "Congo", "Cook Islands", "Costa Rica", "Croatia", "Cuba", "Cyprus", "Czech Republic", "Democratic Republic of the Congo", "Denmark", "Djibouti", "Dominica", "Dominican Republic", "East Timor", "Ecuador", "Egypt", "El Salvador", "Equatorial Guinea", "Eritrea", "Estonia", "Ethiopia", "Faeroe Islands", "Falkland Islands", "Fiji", "Finland", "Former Yugoslav Republic of Macedonia", "France", "French Guiana", "French Polynesia", "French Southern Territories", "Gabon", "Georgia", "Germany", "Ghana", "Gibraltar", "Greece", "Greenland", "Grenada", "Guadeloupe", "Guam", "Guatemala", "Guinea", "Guinea-Bissau", "Guyana", "Haiti", "Heard Island and McDonald Islands", "Honduras", "Hong Kong", "Hungary", "Iceland", "India", "Indonesia", "Iran", "Iraq", "Ireland", "Israel", "Italy", "Jamaica", "Japan", "Jordan", "Kazakhstan", "Kenya", "Kiribati", "Kuwait", "Kyrgyzstan", "Laos", "Latvia", "Lebanon", "Lesotho", "Liberia", "Libya", "Liechtenstein", "Lithuania", "Luxembourg", "Macau", "Madagascar", "Malawi", "Malaysia", "Maldives", "Mali", "Malta", "Marshall Islands", "Martinique", "Mauritania", "Mauritius", "Mayotte", "Mexico", "Micronesia", "Moldova"}; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); AutoCompleteTextView actv = (AutoCompleteTextView) findViewById(R.id.autocomplete_country); /** * args[0] 不用解釋了 * args[1] 爲AutoCompleteTextView 中的每個數據提供佈局 * args[3] 提供數據來源 */ ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,R.layout.item_list ,COUNTRIES); //啓用監聽器 actv.setAdapter(adapter); } }

 

在 ArrayAdapter中爲AutoCompleteTextView提供數據源的另一種方法是在string.xml中添加string-array 如

<?xml version="1.0" encoding="utf-8"?> <resources> <string name="hello">Hello World, AutoCompleteText!</string> <string name="app_name">AutoCompleteTextView</string> <string-array name="country"> <item>Angola</item> <item>Bahrain</item> <item>Bangladesh</item> <item>Botswana</item> <item>Colombia</item> </string-array> </resources>

 

獲取數據

String[] countries = getResources.getStringArray(R.array.countr);

ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,R.layout.item_list ,country );