Yoctopuce Yocto-Display, Руководство пользователя, Страница: 128 / 424

ex. printStackTrace ();
}
DisplayModuleInfo ();
}
}
Warning: the number of write cycles of the nonvolatile memory of the module is limited. When this
limit is reached, nothing guaranties that the saving process is performed correctly. This limit, linked to
the technology employed by the module micro-processor, is located at about 100000 cycles. In short,
you can use the
YModule.saveToFlash()
function only 100000 times in the life of the module.
Make sure you do not call this function within a loop.
Listing the modules
Obtaining the list of the connected modules is performed with the
YModule.yFirstModule()
function which returns the first module found. Then, you only need to call the
nextModule()
function of this object to find the following modules, and this as long as the returned value is not
null
. Below a short example listing the connected modules.
package com.yoctopuce.doc_examples ;
import android.app.Activity ;
import android.os.Bundle ;
import android.util.TypedValue ;
import android.view.View ;
import android.widget.LinearLayout ;
import android.widget.TextView ;
import com.yoctopuce.YoctoAPI.YAPI ;
import com.yoctopuce.YoctoAPI.YAPI_Exception ;
import com.yoctopuce.YoctoAPI.YModule ;
public class Inventory extends Activity
{
@Override
public void onCreate ( Bundle savedInstanceState )
{
super . onCreate ( savedInstanceState );
setContentView ( R. layout . inventory );
}
public void refreshInventory ( View view )
{
LinearLayout layout = ( LinearLayout ) findViewById ( R. id . inventoryList );
layout. removeAllViews ();
try {
YAPI . UpdateDeviceList ();
YModule module = YModule . FirstModule ();
while ( module != null ) {
String line = module. get_serialNumber () + " (" + module. get_productName () +
")" ;
TextView tx = new TextView (this);
tx. setText ( line );
tx. setTextSize ( TypedValue. COMPLEX_UNIT_SP , 20 );
layout. addView ( tx );
module = module. nextModule ();
}
} catch ( YAPI_Exception e ) {
e. printStackTrace ();
}
}
@Override
protected void onStart ()
{
super . onStart ();
try {
YAPI . EnableUSBHost (this);
YAPI . RegisterHub ( "usb" );
} catch ( YAPI_Exception e ) {
e. printStackTrace ();
19. Using the Yocto-Display with Android
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