Google Android - это несложно

Код: Выделить всё

public class InputActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_input);
		Log.d("my Log", "создание адаптера");
		ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, getResources().getStringArray(R.array.category));
		adapter.setDropDownViewResource(android.R.layout.simple_spinner_item);
		Log.d("my Log", "создание spinner");
		Spinner spinner = (Spinner) findViewById(R.id.catSpinner);
		Log.d("my Log", "установка адаптера cпинеру");
		spinner.setAdapter(adapter);	
		
		spinner.setOnItemSelectedListener(spinnerClick);
		
		
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.input, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// Handle action bar item clicks here. The action bar will
		// automatically handle clicks on the Home/Up button, so long
		// as you specify a parent activity in AndroidManifest.xml.
		int id = item.getItemId();
		if (id == R.id.action_settings) {
			return true;
		}
		return super.onOptionsItemSelected(item);
	}
	
	public OnItemSelectedListener spinnerClick = new OnItemSelectedListener() {

		@Override
		public void onItemSelected(AdapterView<?> parent, View view,
				int position, long id) {
			// TODO Auto-generated method stub
			Toast.makeText(getBaseContext(), "pos = " + position, Toast.LENGTH_LONG).show();
		}

		@Override
		public void onNothingSelected(AdapterView<?> parent) {
			// TODO Auto-generated method stub
			
		}
	};	
}

Код: Выделить всё

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/mainLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.google.mail.tomattman.cashcontrol.InputActivity" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:orientation="vertical" >

            <EditText
                android:id="@+id/titleInput"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_weight="0"
                android:ems="10"
                android:hint="@string/titleInputHint" />

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_weight="1" >

                <EditText
                    android:id="@+id/costInput"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_weight="5"
                    android:ems="10"
                    android:hint="@string/costTextView"
                    android:inputType="numberDecimal" >

                    <requestFocus />
                </EditText>

                <EditText
                    android:id="@+id/countInput"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_weight="7"
                    android:ems="10"
                    android:hint="@string/countTextView"
                    android:inputType="numberDecimal" />

                <Spinner
                    android:id="@+id/catSpinner"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_weight="7" />

            </LinearLayout>

        </LinearLayout>

        <Button
            android:id="@+id/addButton"
            style="?android:attr/buttonStyleSmall"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_weight="0"
            android:text="@string/add" />

    </LinearLayout>

    <TextView
        android:id="@+id/sumTextView"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:text="Medium Text"
        android:textAppearance="?android:attr/textAppearanceMedium" />

</LinearLayout>