Auto Complete TextView

How to create AutoCompleteTextView:

An editable text view that shows completion suggestions automatically while the user is typing. The list of suggestions is displayed in a drop down menu from which the user can choose an item to replace the content of the edit box with.

The drop down can be dismissed at any time by pressing the back key or, if no item is selected in the drop down, by pressing the enter/dpad center key.

The list of suggestions is obtained from a data adapter and appears only after a given number of characters defined by the threshold.

First we create an Array to set data in AutoCompleteTextView

ArrayAdapter class is used to set the data on textview by using setAdapter method.

MainActivity.java: 

public class MainActivity extends Activity {

       AutoCompleteTextView avt;

      

       @Override

       protected void onCreate(Bundle savedInstanceState) {

              super.onCreate(savedInstanceState);

              setContentView(R.layout.activity_main);

             

              avt = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView1);

             

              final String[] arr = {"select language","Java" ,"Android", "C", "C++"};

             

              ArrayAdapter<String> adapter = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1,arr);

              avt.setAdapter(adapter);

                          

             

              avt.setOnKeyListener(new OnKeyListener() {

                    

                     @Override

                     public boolean onKey(View v, int keyCode, KeyEvent event) {

                            

                           if(event.getAction() == KeyEvent.ACTION_DOWN && keyCode == KeyEvent.KEYCODE_ENTER)

                          

                                  Toast.makeText(MainActivity.this, "clicked", Toast.LENGTH_SHORT).show();

                           return false;

                     }

              });

       }

       @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;

       }

}

activity_main.xml :

android:completionThreshold property shows auto suggestion appear with 1st character only. By Default it is 2.

<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=".MainActivity" >

    <AutoCompleteTextView

        android:id="@+id/autoCompleteTextView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentTop="true"

        android:layout_centerHorizontal="true"

        android:layout_marginTop="44dp"

        android:ems="10"

        android:text=""

        android:completionThreshold="1">

        <requestFocus />

    </AutoCompleteTextView>

  

</RelativeLayout>

**************************************************************************************************************************

Reach us At: - 0120-4029000 / 24 / 25 / 27 / 29 Mbl: 9953584548

Write us at: - smruti@apextgi.com and pratap@apextgi.com