Android :ListView dan ListviewActivity

kali ini kita akan belajar membuat aplikasi Listview dan ListviewActivity, yang dimana cara kerjanya adalah Activity utama (ListviewActivity) memanggil sub-Activity (AndroidlistviewActivity).

                                                      Activity Utama (ListviewActivity)

                                                    Sub-Activity (AndroidlistviewActivity)

• Pertama kita buat project baru dengan kriteria

Nama : listview

Package Name : tutorial.listview

Activity Name : ListviewActivity

• Jika sudah buka file main.xml dan lakukan perubahan seperti berikut ini

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    > <TextView    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:text="@string/hello"    /> <Button    android:id="@+id/selectCountryButton"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_gravity="center"    android:text="Pilih Negara"    /> <TextView    android:id="@+id/myCountry"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_gravity="center"    /> </LinearLayout>

• Selanjutnya kita buka file ListviewActivity dan lakukan perubahan seperti dibawah ini

package tutorial.listview; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; public class ListviewActivity extends Activity {  TextView MyCountry;    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);              MyCountry = (TextView)findViewById(R.id.myCountry);        Button SelectCountryButton = (Button)findViewById(R.id.selectCountryButton);        SelectCountryButton.setOnClickListener(SelectCountryButtonOnClickListener);    }      private Button.OnClickListener SelectCountryButtonOnClickListener =     new Button.OnClickListener()    {   @Override   public void onClick(View v) {    // TODO Auto-generated method stub    Intent intent = new Intent();            intent.setClass(ListviewActivity.this, AndroidlistviewActivity.class);                      startActivityForResult(intent, 0);   }    };  @Override  protected void onActivityResult(int requestCode, int resultCode, Intent data) {   // TODO Auto-generated method stub   super.onActivityResult(requestCode, resultCode, data);    if (requestCode==0)    {     switch (resultCode)     { case RESULT_OK:       MyCountry.setText(data.getStringExtra("negara"));       break;      case RESULT_CANCELED:       break;       }    }  }     }

• Selanjutnya kita buat class baru dengan nama AndroidlistviewActivity dan kita letakkan di package tutorial.listview
• kita buka file AndroidlistviewActivity.java dan lakukan perubahan seperti berikut.

package tutorial.listview; import android.app.ListActivity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.ArrayAdapter; import android.widget.ListView; public class AndroidlistviewActivity extends ListActivity {  @Override  protected void onCreate(Bundle savedInstanceState) {   // TODO Auto-generated method stub   super.onCreate(savedInstanceState);     setListAdapter(new ArrayAdapter<String>(this,             android.R.layout.simple_list_item_1, COUNTRIES));   getListView().setTextFilterEnabled(true);  }  static final String[] COUNTRIES = 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  protected void onListItemClick(ListView l, View v, int position, long id) {   // TODO Auto-generated method stub   super.onListItemClick(l, v, position, id);       Intent intent = new Intent();     Bundle bundle = new Bundle();       bundle.putString("negara", l.getItemAtPosition(position).toString());     intent.putExtras(bundle);     setResult(RESULT_OK, intent);     finish();  } }

• Selanjutnya kita buka file Android Manifest.xml dan tambahkan code berikut yang dicetak tebal kedalamnya.

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"     package="tutorial.listview"     android:versionCode="1"     android:versionName="1.0" >     <uses-sdk android:minSdkVersion="8" />     <application         android:icon="@drawable/ic_launcher"         android:label="@string/app_name" >         <activity             android:label="@string/app_name"             android:name=".ListviewActivity" >             <intent-filter >                 <action android:name="android.intent.action.MAIN" />                 <category android:name="android.intent.category.LAUNCHER" />             </intent-filter>         </activity>         <activity android:name=".AndroidlistviewActivity"></activity>     </application> </manifest>

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