Step 1: Add the following Code to activity_main.xml
<RelativeLayout 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: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.example.spinner_example.MainActivity" > <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="" /> <Spinner android:id="@+id/spinner1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:prompt="@string/spinner_title" android:layout_marginTop="81dp" /> <Button android:id="@+id/add_btn" style="?android:attr/buttonStyleSmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="300dp" android:text="+" android:onClick="add_item" /> <Button android:id="@+id/remove_btn" style="?android:attr/buttonStyleSmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/add_btn" android:layout_alignBottom="@+id/add_btn" android:layout_alignParentRight="true" android:onClick="remove_item" android:text="-" /> <EditText android:id="@+id/editText1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/spinner1" android:layout_below="@+id/spinner1" android:layout_marginTop="27dp" android:hint="Enter Item" android:ems="10" > <requestFocus /> </EditText> </RelativeLayout>
Step 2: Add the following code to mainActivity.java
package com.example.spinner_example; import java.util.ArrayList; import java.util.List; import android.os.Bundle; import android.support.v7.app.ActionBarActivity; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemSelectedListener; import android.widget.ArrayAdapter; import android.widget.EditText; import android.widget.Spinner; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends ActionBarActivity implements OnItemSelectedListener{ private Spinner spinner; private List<String> list; private ArrayAdapter<String> adapter; private TextView textView; private EditText editText; private String editText_text,selected_item; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); editText= (EditText) findViewById(R.id.editText1); spinner = (Spinner) findViewById(R.id.spinner1); textView =(TextView) findViewById(R.id.textView1); list=new ArrayList<String>(); list.add("Surat"); list.add("Nagaur");list.add("Delhi"); add_spinner(); } public void add_spinner() { adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,list); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); //Spinner click listener spinner.setAdapter(adapter); spinner.setOnItemSelectedListener(this); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, 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 void add_item(View v) { editText_text= editText.getText().toString(); if(editText_text.length()<1) { Toast.makeText(this,"Please enter item ",Toast.LENGTH_SHORT).show(); } else { list.add(editText_text); textView.setText("Added : "+editText_text); add_spinner(); editText.setText(null); } } public void remove_item(View v) { list.remove(selected_item); textView.setText("Removed : " + selected_item); add_spinner(); } @Override public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) { // TODO Auto-generated method stub spinner.setSelection(arg2); selected_item = (String) spinner.getSelectedItem(); } @Override public void onNothingSelected(AdapterView<?> arg0) { // TODO Auto-generated method stub } }
Step 3 : Now you can save and execute the Application. Your output will be like this :
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