Creation of button in an Android widget

I am trying to write a code for an SMS widget. I wrote something that I can compile, and print on screen my first SMS. When I click on next, nothing happened. This is my code:

package android.MySMSwidget;

import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.RemoteViews;
import android.content.ComponentName;
import android.content.Context;
import android.database.Cursor;
import android.app.*;

public class MySMSwidget extends AppWidgetProvider implements View.OnClickListener {


private Button Bnext;
private int sms_id=0;
public class MyActivity extends Activity {
     protected void onCreate(Bundle icicle) {
         super.onCreate(icicle);
         setContentView(R.layout.widget_layout);
            final Button button = (Button) findViewById(R.id.next);
             button.setOnClickListener(new View.OnClickListener() {
                 public void onClick(View v) {
                     if (v==Bnext){sms_id=sms_id+1;}
                 }

             });
     }

  }

 public void onUpdate(Context context, AppWidgetManager appWidgetManager,
            int[]开发者_Python百科 appWidgetIds) {

    Cursor c = context.getContentResolver().query(Uri.parse("content://sms/"), null, null ,null,null);
    String body = null;
    String number = null;
    String date = null;
    c.moveToPosition(sms_id);

    body = c.getString(c.getColumnIndexOrThrow("body")).toString();
    number = c.getString(c.getColumnIndexOrThrow("address")).toString();
    date = c.getString(c.getColumnIndexOrThrow("date")).toString();


    c.close();

    RemoteViews updateViews = new RemoteViews(context.getPackageName(),
            R.layout.widget_layout);

    updateViews.setTextColor(R.id.text, 0xFF000000);
    updateViews.setTextViewText(R.id.text,date+'\n'+number+'\n'+body);
    ComponentName thisWidget = new ComponentName(context, MySMSwidget.class);
    appWidgetManager.updateAppWidget(thisWidget, updateViews);
 }
public void onClick(View v) {
         if (v==Bnext){sms_id=sms_id+1;}
 }

 }

If someone can explain to me where and why I'm wrong, I will be grateful. Thanks for reading me.

Generally it is not possible to add interactive controls to standard Android Widgets. You can detect a click on the Widget itself.