本案例简单实现进度条可走，可拖拽的功能，下面请看源码：

布局文件：

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

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".MainActivity" >

    <SeekBar

        android:id="@+id/seekBar1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_alignParentTop="true" />

</RelativeLayout>

java文件：

package com.example.lession16_seekbar;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.app.Activity;

import android.view.Menu;

import android.widget.SeekBar;

public class MainActivity extends Activity {

	private SeekBar seekBar;

	private static final int MAX_PROGRESS =100;

	private int current_progress=10;

	private static final int PRO=1;

	private Handler handler;

	@Override

	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		setContentView(R.layout.activity_main);

		seekBar = (SeekBar) this.findViewById(R.id.seekBar1);

		seekBar.setMax(MAX_PROGRESS);

	/*	new Thread(new Runnable() {

			@Override

			public void run() {

				while(true){

					try {

						Thread.sleep(600);

						current_progress+=10;

						seekBar.setProgress(current_progress);

					} catch (InterruptedException e) {

						// TODO Auto-generated catch block

						e.printStackTrace();

					}

				}

			}

		}).start();*/

		handler = new Handler(){

			 @Override

			public void handleMessage(Message msg) {

				super.handleMessage(msg);

				switch (msg.what) {

				case PRO:

					  if(current_progress>=MAX_PROGRESS){

					  }else{

						  current_progress+=1;

						  seekBar.incrementProgressBy(1);

						  handler.sendEmptyMessageDelayed(PRO, 600);

					  }

					break;

				default:

					break;

				}

			}

		};

	 current_progress=current_progress>0?current_progress:0;

	 seekBar.setProgress(current_progress);

	 handler.sendEmptyMessage(PRO);

	}

	@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;

	}

}

效果图（自动走）：