package com.example.mars_2400_seekbar;

import android.support.v7.app.ActionBarActivity;

import android.support.v7.app.ActionBar;

import android.support.v4.app.Fragment;

import android.app.Activity;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.view.ViewGroup;

import android.widget.SeekBar;

import android.widget.SeekBar.OnSeekBarChangeListener;

import android.widget.TextView;

import android.os.Build;

public class MainActivity extends Activity implements OnSeekBarChangeListener {

    private TextView tv;

    private SeekBar sb;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        tv = (TextView) findViewById(R.id.textView1);

        sb = (SeekBar) findViewById(R.id.seekbar);

        sb.setOnSeekBarChangeListener(this);

    }

    @Override

    public void onProgressChanged(SeekBar seekBar, int progress,

            boolean fromUser) {

        // TODO Auto-generated method stub

        tv.setText("Progress is " + progress

                + (fromUser ? " Trigger" : " Nontrigger") + " by user.");

    }

　　　　@Override
　　　　public void onStartTrackingTouch(SeekBar seekBar) {
　　　　　　// TODO Auto-generated method stub
　　　　　　System.out.println("onStart-->"+seekBar.getProgress());
　　　　}

　　　　@Override
　　　　public void onStopTrackingTouch(SeekBar seekBar) {
　　　　　　// TODO Auto-generated method stub
　　　　　　System.out.println("onStop-->"+seekBar.getProgress());
　　　　}

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.main, menu);

        return true;

    }

}

<?xml version="1.0" encoding="UTF-8"?>

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

         android:orientation="vertical"

         android:layout_width="fill_parent"

         android:layout_height="fill_parent"

         >

<TextView android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:id="@+id/textView1"/>

<SeekBar android:id="@+id/seekbar"

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"/>

 </LinearLayout>