Beispiel für eine Android-Bewertungsleiste

package com.example.android;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.RatingBar;
import android.widget.RatingBar.OnRatingBarChangeListener;
import android.widget.TextView;
import android.widget.Toast;

public class MyAndroidAppActivity extends Activity {

  private RatingBar ratingBar;
  private TextView txtRatingValue;
  private Button btnSubmit;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    addListenerOnRatingBar();
    addListenerOnButton();

  }

  public void addListenerOnRatingBar() {

    ratingBar = (RatingBar) findViewById(R.id.ratingBar);
    txtRatingValue = (TextView) findViewById(R.id.txtRatingValue);

    //if rating value is changed,
    //display the current rating value in the result (textview) automatically
    ratingBar.setOnRatingBarChangeListener(new OnRatingBarChangeListener() {
        public void onRatingChanged(RatingBar ratingBar, float rating,
            boolean fromUser) {

            txtRatingValue.setText(String.valueOf(rating));

        }
    });
  }

  public void addListenerOnButton() {

    ratingBar = (RatingBar) findViewById(R.id.ratingBar);
    btnSubmit = (Button) findViewById(R.id.btnSubmit);

    //if click on me, then display the current rating value.
    btnSubmit.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {

            Toast.makeText(MyAndroidAppActivity.this,
                String.valueOf(ratingBar.getRating()),
                    Toast.LENGTH_SHORT).show();

        }

    });

  }
}