android學習之AutoCompleteTextView控制項的學習

使用AutoCompleteTextView控制項最關鍵的地方還是用ArrayAdapter適配器給他提供內容。

本例有兩個xml布局檔案：一個是main.xml檔案，裡面有TextView和AutoCompleteTextView控制項

main.xml：

<?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="fill_parent">
 <TextView
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="請輸入"
  />

 <AutoCompleteTextView
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:id="@+id/actv"
  android:layout_marginLeft="5dp"
  />
</LinearLayout>

還有一個list_item.xml檔案，裡面是用來約束ArrayAdapter資料輸入的格式，裡面就一個TextView：

<?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:id="@+id/textView"
    >
</TextView>

 

java代碼：

import android.app.Activity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.TextView;

public class AutoCompleteTextViewActivity extends Activity {
 private AutoCompleteTextView actv = null;
 private TextView textView = null;

 static final String[] str = new String[] {
 "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", "Monaco", "Mongolia",
   "Montserrat", "Morocco", "Mozambique", "Myanmar", "Namibia",
   "Nauru", "Nepal", "Netherlands", "Netherlands Antilles",
   "New Caledonia", "New Zealand", "Nicaragua", "Niger", "Nigeria",
   "Niue", "Norfolk Island", "North Korea", "Northern Marianas",
   "Norway", "Oman", "Pakistan", "Palau", "Panama",
   "Papua New Guinea", "Paraguay", "Peru", "Philippines",
   "Pitcairn Islands", "Poland", "Portugal", "Puerto Rico", "Qatar",
   "Reunion", "Romania", "Russia", "Rwanda", "Sqo Tome and Principe",
   "Saint Helena", "Saint Kitts and Nevis", "Saint Lucia",
   "Saint Pierre and Miquelon", "Saint Vincent and the Grenadines",
   "Samoa", "San Marino", "Saudi Arabia", "Senegal", "Seychelles",
   "Sierra Leone", "Singapore", "Slovakia", "Slovenia",
   "Solomon Islands", "Somalia", "South Africa",
   "South Georgia and the South Sandwich Islands", "South Korea",
   "Spain", "Sri Lanka", "Sudan", "Suriname",
   "Svalbard and Jan Mayen", "Swaziland", "Sweden", "Switzerland",
   "Syria", "Taiwan", "Tajikistan", "Tanzania", "Thailand",
   "The Bahamas", "The Gambia", "Togo", "Tokelau", "Tonga",
   "Trinidad and Tobago", "Tunisia", "Turkey", "Turkmenistan",
   "Turks and Caicos Islands", "Tuvalu", "Virgin Islands", "Uganda",
   "Ukraine", "United Arab Emirates", "United Kingdom",
   "United States", "United States Minor Outlying Islands", "Uruguay",
   "Uzbekistan", "Vanuatu", "Vatican City", "Venezuela", "Vietnam",
   "Wallis and Futuna", "Western Sahara", "Yemen", "Yugoslavia",
   "Zambia", "Zimbabwe"
 };

 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  actv = (AutoCompleteTextView) findViewById(R.id.actv);
  textView = (TextView) findViewById(R.id.textView);

  /**
   * 調用ArrayAdapter的建構函式建立一個ArrayAdapter對象
   * 第一個參數指上下文
   * 第二個參數指定了下拉式功能表中每一個條目的樣式
   * 第三個參數指定了TextView控制項的id
   * 第四個參數要添加資料的集合，為整個列表提供資料
   */
  ArrayAdapter<String> aa = new ArrayAdapter<String>(this, R.layout.list_item, R.id.textView, str);
  actv.setAdapter(aa);
 }
}