Spinner in Android application is equivalent of ComboBox
Spinners provide a quick way to select one value from a set. In the default state, a spinner shows its currently selected value. Touching the spinner displays a dropdown menu with all other available values, from which the user can select a new one.
You can add a spinner to your layout with the spinner.
For example<Spinner android:id="@+id/spnCountry" android:layout_width="match_parent" android:layout_height="wrap_content"> </Spinner>
List of Items in Spinner
Open “res/values/strings.xml” file, define the list of items that will display in Spinner
File : res/values/strings.xml
<resources>
<string name="app_name">Layouts</string>
<string name="prompt_country">Select a Country</string>
<string-array name="country_list">
<item>India</item>
<item>United States</item>
<item>Singapore</item>
<item>Malaysia</item>>
<item>France</item>
<item>Italy</item>
<item>New Zealand</item>
</string-array>
</resources>
Spinner selection items will be defined in xml file
<Spinner
android:id="@+id/spnCountry"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:entries="@array/country_list"
>
</Spinner>
Other method :
<Spinner
android:id="@+id/spnCountry"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:prompt="@string/prompt_country"
android:entries="@array/country_list"
android:spinnerMode="dialog"
>
</Spinner>
Spinner selection items will be defined in code
add code in onCreate methodpublic class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Spinner spnCountry = (Spinner) findViewById(R.id.spnCountry);
ArrayAdapter<String> myAdapter = new ArrayAdapter<String>(MainActivity.this,
android.R.layout.simple_list_item_1,getResources().getStringArray(R.array.country_list));
myAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spnCountry.setAdapter(myAdapter);
}
}
Video
How to set selected item of Spinner programmatically in Android
Get spinner selected items text?
This example enplane value display on button clickJava code
Button btnSubmit = (Button) findViewById(R.id.btnSubmit);
btnSubmit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(TestActivity.this,String.valueOf(spnCountry.getSelectedItem()),Toast.LENGTH_LONG).show();
}
});
Example 2
Spinner spnCountry = (Spinner)findViewById(R.id.spnCountry);
String text = spnCountry.getSelectedItem().toString();Handle spinner click event
Spinner setOnItemSelectedListener
spnCountry.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(TestActivity.this,parent.getItemAtPosition(position) + " Selected",Toast.LENGTH_LONG).show();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
Set Key and Value in spinner
SpinnerCountry.javapackage com.example.root.spinner;
/**
* Created by root on 8/6/19.
*/
public class SpinnerCountry {
public String id;
public String country;
public SpinnerCountry(String id,String country) {
this.country = country;
this.id = id;
}
@Override
public String toString() {
return country;
}
}
MainActivity.java
package com.example.root.spinner; import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.Spinner;import android.widget.Toast; import java.util.ArrayList; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Spinner spnCountry = (Spinner) findViewById(R.id.spnCountry); ArrayList<SpinnerCountry> countryList = new ArrayList<SpinnerCountry>(); //add coutries countryList.add(new SpinnerCountry("1","India")); countryList.add(new SpinnerCountry("2","France")); countryList.add(new SpinnerCountry("3","United States")); //fill data in spinner ArrayAdapter<SpinnerCountry> spinnerAdapter = new ArrayAdapter<SpinnerCountry>(MainActivity.this, android.R.layout.simple_spinner_dropdown_item,countryList); spnCountry.setAdapter(spinnerAdapter);// And this is how we can retrieve it upon item selection
spnCountry.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener(){ @Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { SpinnerCountry spn = (SpinnerCountry) parent.getItemAtPosition(position); Toast.makeText(MainActivity.this,spn.id,Toast.LENGTH_LONG).show(); } @Override public void onNothingSelected(AdapterView<?> adapterView) { } }); } }
Video
