Android drop down Spinner Example

Android Spinner Example

Today we create an Android Spinner, a drop down spinner to select a value from a list. We use spinner when we have to select an item from a long list. Like when we have to select Country from a spinner drop down item.

Android Spinner Example

To Create a Spinner we have to do some simple steps, 

• Create a Spinner in your XML activity.
• Implement in your Java class.
• Array list to show a drop down list in spinner.
• Array Adapter to integrate list in Array List.

Xml activity

 <?xml version="1.0" encoding="utf-8"?>  
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
   xmlns:app="http://schemas.android.com/apk/res-auto"  
   xmlns:tools="http://schemas.android.com/tools"  
   android:layout_width="match_parent"  
   android:layout_height="match_parent"  
   android:orientation="vertical"  
   tools:context=".Spinner_Activity">  
   <TextView  
     android:layout_width="match_parent"  
     android:layout_height="wrap_content"  
     android:text="Android Spinner"  
     android:layout_margin="20dp"  
     android:textStyle="bold"  
     android:textSize="18sp"/>  
   <androidx.appcompat.widget.AppCompatSpinner  
     android:id="@+id/spinner"  
     android:layout_width="match_parent"  
     android:layout_height="wrap_content"  
     android:layout_margin="20dp"/>  
 </LinearLayout>  

Java Class

 public class Spinner_Activity extends AppCompatActivity {  
   Spinner spinner;  
   ArrayList<String> spinner_list = new ArrayList<>();  
   @Override  
   protected void onCreate(Bundle savedInstanceState) {  
     super.onCreate(savedInstanceState);  
     setContentView(R.layout.activity_spinner_);  
     spinner = findViewById(R.id.spinner);  
     spinner_list.add("Harpreet");  
     spinner_list.add("Studio");  
     spinner_list.add("View");  
     spinner_list.add("like");  
     spinner_list.add("share");  //4th position  
     spinner_list.add("subscribe");  
     spinner_list.add("youtube");  
     spinner_list.add("facebook");  
     spinner_list.add("instagram");  
     ArrayAdapter adapter = new ArrayAdapter(Spinner_Activity.this,  
         android.R.layout.simple_list_item_1,spinner_list); // simple list item is default list  
                                   // with single text view, you can create your own list also  
     adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);  
     spinner.setAdapter(adapter);  
     // spinner.setSelection(4); //it's starts from 0 so it's 4th position is share  
     if(spinner_list.contains("like"))  
     {  
       spinner.setSelection(spinner_list.indexOf("like")); //if you have a string to set on spinner  
     }  
     spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {  
       @Override  
       public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {  
         Toast.makeText(Spinner_Activity.this, "Selected item is "+  
             spinner.getSelectedItem().toString() + " \nPosition is "+i, Toast.LENGTH_SHORT).show();  
       }  
       @Override  
       public void onNothingSelected(AdapterView<?> adapterView) {  
       }  
     });  
   }  
 }  

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