[Android] Spinner選單

1.固定選項

layout.xml 

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin"> <Spinner android:id="@+id/spinner" android:layout_width="match_parent" android:layout_height="wrap_content" /> </RelativeLayout>

string.xml

 <resources>

<string name="app_name">SpinnerDemo</string> <string-array name="lunch"> <item>雞腿飯</item> <item>魯肉飯</item> <item>排骨飯</item> <item>水餃</item> <item>陽春麵</item> </string-array> </resources>

java-code

public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Spinner spinner = (Spinner)findViewById(R.id.spinner); ArrayAdapter<CharSequence> lunchList = ArrayAdapter.createFromResource(MainActivity.this, R.array.lunch, android.R.layout.simple_spinner_dropdown_item);

spinner.setAdapter(lunchList); } }

simple_spinner_dropdown_item 

 Android 所提供的布局方式 
https://developer.android.com/reference/android/R.layout.html#simple_spinner_dropdown_item

2.動態選項

ayout.xml 

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin"> <Spinner android:id="@+id/spinner" android:layout_width="match_parent" android:layout_height="wrap_content" /> </RelativeLayout>

java-code

public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Spinner spinner = (Spinner)findViewById(R.id.spinner); final String[] lunch = {"雞腿飯", "魯肉飯", "排骨飯", "水餃", "陽春麵"}; ArrayAdapter<String> lunchList = new ArrayAdapter<>(MainActivity.this, android.R.layout.simple_spinner_dropdown_item, lunch); spinner.setAdapter(lunchList); } }

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 java all

public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main);

//動態選單 Spinner spinner = (Spinner)findViewById(R.id.spinner); final String[] lunch = {"雞腿飯", "魯肉飯", "排骨飯", "水餃", "陽春麵"}; ArrayAdapter<String> lunchList = new ArrayAdapter<>(MainActivity.this, android.R.layout.simple_spinner_dropdown_item, lunch); spinner.setAdapter(lunchList);

//選單動作

spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { Toast.makeText(MainActivity.this, "你選的是" + lunch[position], Toast.LENGTH_SHORT).show(); } @Override public void onNothingSelected(AdapterView<?> parent) { } }); } }

onItemSelected事件中所代表的是當使用者按下 Spinner 的某個 item 
該怎麼處理它們, 

參考:GIVEMEPASS'S ANDROID惡補筆記 -如何使用Spinner(下拉式選單)