Android dropdown menu view Spinner
Define the string array in strings.xml
<resources> <string name="app_name">Map Direction</string> <string-array name="cities"> <item>New York, NY</item> <item>Washington, DC</item> <item>Miami, FL</item> <item>Los Angeles, CA</item> <item>San Francisco, CA</item> <item>Las Vegas, NV</item> </string-array> </resources>
Define the dropdown menu view Spinner in a layout file such as activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <Spinner android:id="@+id/s_cities" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="20dp"/> </LinearLayout>
Initialize the dropdown menu in the Activity.
public class MainActivity extends AppCompatActivity { private Spinner spinnerCities; private String [] cities; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); spinnerCities = (Spinner) findViewById(R.id.s_cities); cities = getResources().getStringArray(R.array.cities); ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.cities, android.R.layout.simple_spinner_item); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); spinnerCities.setAdapter(adapter); spinnerCities.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) { Toast.makeText(getApplicationContext(), cities[i], Toast.LENGTH_SHORT).show(); } @Override public void onNothingSelected(AdapterView<?> adapterView) { } }); } }
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