拖动条

<TextView
    android:id="@+id/textView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="当前值：50" />
<SeekBar
    android:max="100"
    android:progress="50"
    android:padding="10dp"
    android:id="@+id/seekBar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

public class MainActivity extends AppCompatActivity {
    private RatingBar ratingBar;
    private Button bn;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ratingBar = (RatingBar) findViewById(R.id.ratingBar);
        bn = (Button) findViewById(R.id.bn);
        bn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                int result = ratingBar.getProgress();
                float raing = ratingBar.getRating();
                float step = ratingBar.getStepSize(); 
               Log.i("星级评分","'进度值："+result+"默认星："+raing+"每一步多少："+step);
               Toast.makeText(MainActivity.this, "您获得了"+raing+"颗星星",Toast.LENGTH_SHORT).show();
            }
        });
    }
}