安卓-拖动条（SeekBar）范例

main.xml代码如下：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <SeekBar        android:id="@+id/seekbar"        android:layout_width="fill_parent"        android:layout_height="wrap_content" />    <TextView        android:id="@+id/text"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:scrollbars="vertical" /></LinearLayout>

package org.lxh.demo;import android.app.Activity;import android.app.AlertDialog;import android.app.Dialog;import android.app.ProgressDialog;import android.content.DialogInterface;import android.os.Bundle;import android.text.method.ScrollingMovementMethod;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.AdapterView.OnItemSelectedListener;import android.widget.Button;import android.widget.SeekBar;import android.widget.SeekBar.OnSeekBarChangeListener;import android.widget.Spinner;import android.widget.TextView;public class Hello extends Activity {	private SeekBar seek = null;	private TextView text = null;	@Override	public void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState); // 生命周期方法		super.setContentView(R.layout.main); // 设置要使用的布局管理器		this.seek = (SeekBar) super.findViewById(R.id.seekbar);		this.text = (TextView) super.findViewById(R.id.text);		this.text.setMovementMethod(ScrollingMovementMethod.getInstance());		this.seek.setOnSeekBarChangeListener(new OnSeekBarChangeListenerImpl());	}	private class OnSeekBarChangeListenerImpl implements			OnSeekBarChangeListener {		public void onProgressChanged(SeekBar seekBar, int progress,				boolean fromUser) {			Hello.this.text.append("***正在拖动，当前值为：" + seekBar.getProgress()					+ "\n");		}		public void onStartTrackingTouch(SeekBar seekBar) {			text.append("***开始拖动，当前值为：" + seekBar.getProgress() + "\n");		}		public void onStopTrackingTouch(SeekBar seekBar) {			text.append("***停止拖动，当前值为：" + seekBar.getProgress() + "\n");		}	}}

源码下载：http://download.csdn.net/detail/yayun0516/8379373