Android tutorial (15th) -- Use of the automatic prompt box

In this chapter, we will talk about the use of AutoCompleteTextView in the automatic prompt box.

I believe that when we use Baidu, Google, and other search engines, we enter a word in the input box, and related prompts will appear below the input box.

In fact, this function will bring us a lot of convenience. Let's see how it is implemented.

Step 1: Create a project Ep. AutoCompleteTextView.

Step 2: design the view.

[Java]
<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">
 
<TextView
Android: id = "@ + id/textView1"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: text = "@ string/hello_world"/>
 
<AutoCompleteTextView
Android: id = "@ + id/autoCompleteTextView1"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: layout_alignLeft = "@ + id/textView1"
Android: layout_below = "@ + id/textView1"
Android: layout_marginTop = "16dp"
Android: EMS = "10">
 
<RequestFocus/>
</AutoCompleteTextView>
 
</RelativeLayout>

<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">

<TextView
Android: id = "@ + id/textView1"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: text = "@ string/hello_world"/>

<AutoCompleteTextView
Android: id = "@ + id/autoCompleteTextView1"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: layout_alignLeft = "@ + id/textView1"
Android: layout_below = "@ + id/textView1"
Android: layout_marginTop = "16dp"
Android: EMS = "10">

<RequestFocus/>
</AutoCompleteTextView>

</RelativeLayout>
Step 3: Write the core file.

[Java]
Package com. example. ep. autocompletetextview;
 
Import android. OS. Bundle;
Import android. app. Activity;
Import android. widget. ArrayAdapter;
Import android. widget. AutoCompleteTextView;
 
Public class MainActivity extends Activity {
 
Private AutoCompleteTextView atct;
Private static final String [] autoStrs = new String [] {"J", "Jo", "Jov", "Jove", "Joven "};
 
@ Override
Protected void onCreate (Bundle savedInstanceState ){
Super. onCreate (savedInstanceState );
SetContentView (R. layout. activity_main );

Atct = (AutoCompleteTextView) findViewById (R. id. autoCompleteTextView1 );
ArrayAdapter <String> adapter = new ArrayAdapter <String> (this, android. R. layout. simple_dropdown_item_1line, autoStrs );
Atct. setAdapter (adapter );
}
 
}

Package com. example. ep. autocompletetextview;

Import android. OS. Bundle;
Import android. app. Activity;
Import android. widget. ArrayAdapter;
Import android. widget. AutoCompleteTextView;

Public class MainActivity extends Activity {

Private AutoCompleteTextView atct;
Private static final String [] autoStrs = new String [] {"J", "Jo", "Jov", "Jove", "Joven "};

@ Override
Protected void onCreate (Bundle savedInstanceState ){
Super. onCreate (savedInstanceState );
SetContentView (R. layout. activity_main );

Atct = (AutoCompleteTextView) findViewById (R. id. autoCompleteTextView1 );
ArrayAdapter <String> adapter = new ArrayAdapter <String> (this, android. R. layout. simple_dropdown_item_1line, autoStrs );
Atct. setAdapter (adapter );
}

}