Yoctopuce Yocto-Display, Руководство пользователя

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A real example
Launch you Java environment and open the corresponding sample project provided in the directory
Examples//Doc-Examples of the Yoctopuce library.
In this example, you can recognize the functions explained above, but this time used with all the side
materials needed to make it work nicely as a small demo.
package com.yoctopuce.doc_examples ;
import android.app.Activity ;
import android.os.Bundle ;
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 com.yoctopuce.YoctoAPI.YAPI ;
import com.yoctopuce.YoctoAPI.YAPI_Exception ;
import com.yoctopuce.YoctoAPI.YDisplay ;
import com.yoctopuce.YoctoAPI.YDisplayLayer ;
public class GettingStarted_Yocto_Display extends Activity implements
OnItemSelectedListener
{
private YDisplay display = null ;
private ArrayAdapter < String > aa ;
@Override
public void onCreate ( Bundle savedInstanceState )
{
super . onCreate ( savedInstanceState );
setContentView ( R. layout . gettingstarted_yocto_display );
Spinner my_spin = ( Spinner ) findViewById ( R. id . spinner1 );
my_spin. setOnItemSelectedListener (this);
aa = new ArrayAdapter < String >(this , android. R . layout . simple_spinner_item );
aa. setDropDownViewResource ( android. R . layout . simple_spinner_dropdown_item );
my_spin. setAdapter ( aa );
}
@Override
protected void onStart ()
{
super . onStart ();
aa. clear ();
try {
YAPI . EnableUSBHost (this);
YAPI . RegisterHub ( "usb" );
YDisplay d = YDisplay . FirstDisplay ();
while ( d != null ) {
String hwid = d. get_hardwareId ();
aa. add ( hwid );
d = d. nextDisplay ();
}
} catch ( YAPI_Exception e ) {
e. printStackTrace ();
}
aa. notifyDataSetChanged ();
}
@Override
protected void onStop ()
{
super . onStop ();
YAPI . FreeAPI ();
}
@Override
public void onItemSelected ( AdapterView <?> parent, View view, int pos, long id )
{
String hwid = parent. getItemAtPosition ( pos ) . toString ();
display = YDisplay . FindDisplay ( hwid );
19. Using the Yocto-Display with Android
www.yoctopuce.com 117