下拉式選單

Main.xml

<TextView

        android:id="@+id/result"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="" />

<Spinner

        android:id="@+id/feet"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:drawSelectorOnTop="true"

        android:prompt="@string/feet_prompt" />

Res/string.xml

<string name="feet_prompt">選擇呎</string>

<string-array name="feets">

<item>2 呎</item>

<item>3 呎</item>

<item>4 呎</item>

<item>5 呎</item>

<item>6 呎</item>

<item>7 呎</item>

<item>8 呎</item>

</string-array>

Activity

private Spinner field_feet;

private TextView resultView;

static final String[] feetsArr = new String[]{"2 feet", "3 feet", "4 feet", "5 feet", "6 feet", "7 feet", "8 feet"};

@Override

protected void onCreate(Bundle savedInstanceState) {

/*…………紅藍的部分擇一………..*/

field_feet = (Spinner)findViewById(R.id.feet);

ArrayAdapter<String> adapter_feetArr = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, feetsArr);

adapter_feetArr.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

field_feet.setAdapter(adapter_feetArr);

ArrayAdapter<CharSequence> adapter_feet = ArrayAdapter.createFromResource(this, R.array.feets, android.R.layout.simple_spinner_item);

adapter_feet.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

field_feet.setAdapter(adapter_feet);

field_feet.setOnItemSelectedListener(getFeet);

}

private Spinner.OnItemSelectedListener getFeet = new Spinner.OnItemSelectedListener(){

@Override

public void onItemSelected(AdapterView<?> parent, View v, int position, long id) {

// TODO Auto-generated method stub

resultView = (TextView)findViewById(R.id.result);

resultView.setText((parent.getSelectedItemPosition() + 2)+"");

}

@Override

public void onNothingSelected(AdapterView<?> arg0) {

// TODO Auto-generated method stub

}

};