Spinner & ListView

By -
Spinners is a type of user interface that facilitate a smart selection of item from a set of items. It's also known as Drop-down. On Touching the spinner provide a drop-down menu of set of items, by default it shows a currently selected item.

ListView is a type of user interface and a view group that provide a view of list with scroll able items.The list items are auto inserted to the list using an Adapter. Adapter is bridge that coordinate between code of different nature.Here it insert content from a Java source to XML source. Java source may be an array or database query and XML are ListView and Spinner etc.Adapter will pick data items from Java source and place it as XML Spinner or ListView contents.

File Name
Code
strings.xml
<resources>
  <string name="app_name">Listing</string>
  <string-array name="gender_type">
      <item>Male</item>
      <item>Female</item>
  </string-array>
</resources>
XML Layout
activity_main.xml
<?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=".MainActivity">

  <Spinner
      android:id="@+id/gender"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:entries="@array/gender_type"/>
  <Spinner
      android:id="@+id/marital_status"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"/>
  <ListView
      android:id="@+id/list"
      android:layout_width="match_parent"
      android:layout_height="wrap_content">

  </ListView>

</LinearLayout>
Java Code
MainActivity.java
public class MainActivity extends AppCompatActivity {
  Spinner maritalStatus;
  String[] status={"Married","Single"};
  ArrayAdapter adapter;
  //////////////////////////
  ListView listView;
  String[] contacts={"Nabel","Humash","Huma"};
  ArrayAdapter contactAdapter;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      maritalStatus=findViewById(R.id.marital_status);
      adapter=new ArrayAdapter(MainActivity.this,android.R.layout.simple_dropdown_item_1line,status);
      maritalStatus.setAdapter(adapter);
      maritalStatus.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
          @Override
          public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
              Toast.makeText(MainActivity.this,"Item Selected :"+status[i],Toast.LENGTH_SHORT).show();
          }

          @Override
          public void onNothingSelected(AdapterView<?> adapterView) {

          }
      });
      //////////////////////////////////
      listView=findViewById(R.id.list);
      contactAdapter=new ArrayAdapter(MainActivity.this,android.R.layout.simple_list_item_1,contacts);
      listView.setAdapter(contactAdapter);
      listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
          @Override
          public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
              Toast.makeText(MainActivity.this,"Item Selected :"+contacts[i],Toast.LENGTH_SHORT).show();

          }
      });
  }

Comments

Post a Comment