<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="20dp"
        android:text="评分"
        android:textColor="@color/string_color"
        android:textSize="@dimen/string_size" />

    <RatingBar
        android:id="@+id/rb"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:stepSize="0.5" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="20dp"
        android:text="拖动条"
        android:textColor="@color/colorAccent"
        android:textSize="@dimen/string_size" />

    <SeekBar
        android:id="@+id/sb"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:max="255"
        android:padding="30dp" />

    <TextView
        android:id="@+id/tv_color"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="我是显示的文字"
        android:textSize="@dimen/string_size" />


</LinearLayout>

import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.RatingBar;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;


public class MainActivity extends AppCompatActivity {
    private RatingBar rb;
    private SeekBar sb;
    private TextView tv_color;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
//        评分
        rb.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() {
            @Override
            public void onRatingChanged(RatingBar ratingBar, float rating, boolean fromUser) {
                Toast.makeText(MainActivity.this, ratingBar.getRating() + "", Toast.LENGTH_SHORT).show();
            }
        });
//         拖动条
        sb.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
//                Toast.makeText(MainActivity.this, seekBar.getProgress()+"", Toast.LENGTH_SHORT).show();
                tv_color.setTextColor(Color.argb(50, 0, progress, 0));
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
                Toast.makeText(MainActivity.this, "拖动开始", Toast.LENGTH_SHORT).show();

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                Toast.makeText(MainActivity.this, "拖动结束", Toast.LENGTH_SHORT).show();


            }
        });


    }

    public void initView() {
        rb = (RatingBar) findViewById(R.id.rb);
        sb = (SeekBar) findViewById(R.id.sb);
        tv_color = (TextView) findViewById(R.id.tv_color);


    }
}