Android SeekBar的使用——简单案例

seekBar.setOnSeekBarChangeListener监听

自动重写3个方法：

onStopTrackingTouch：//拖动后

onStartTrackingTouch：//拖动前

onProgressChanged：//拖动中

 

1. [代码]layout     

01	<?xml version="1.0" encoding="utf-8"?>

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

03	android:orientation="vertical" android:layout_width="fill_parent"

04	android:layout_height="fill_parent">

05	<SeekBar android:id="@+id/SeekBar01" android:layout_width="fill_parent"

06	android:layout_height="wrap_content" android:max="100"

07	android:progress="50" android:secondaryProgress="100"></SeekBar>

08	<TextView android:id="@+id/TextView1" android:layout_width="fill_parent"

09	android:layout_height="wrap_content" android:text="" />

10	<TextView android:id="@+id/TextView2" android:layout_width="fill_parent"

11	android:layout_height="wrap_content" android:text="" />

12	</LinearLayout>

2. [代码]Test_SeekBar.java     

01	package com.Aina.Android;

02

03	import android.app.Activity;

04	import android.os.Bundle;

05	import android.widget.SeekBar;

06	import android.widget.TextView;

07

08	public class Test_SeekBar extends Activity implements SeekBar.OnSeekBarChangeListener{

09	/** Called when the activity is first created. */

10	private SeekBar seekBar;

11	private TextView textView1,textView2;

12

@Override

13	public void onCreate(Bundle savedInstanceState) {

14	super.onCreate(savedInstanceState);

15	setContentView(R.layout.main);

16	seekBar = (SeekBar) this.findViewById(R.id.SeekBar01);

17	textView1 = (TextView) this.findViewById(R.id.TextView1);

18	textView2 = (TextView) this.findViewById(R.id.TextView2);

19	seekBar.setOnSeekBarChangeListener(this);//添加事件监听

20

}

21

//拖动中

22

@Override

23	public void onProgressChanged(SeekBar seekBar, int progress,

24	boolean fromUser) {

25	this.textView1.setText("当前值:"+progress);

26

27

}

28

//开始拖动

29

@Override

30	public void onStartTrackingTouch(SeekBar seekBar) {

31	this.textView2.setText("拖动中...");

32

33

}

34

//结束拖动

35

@Override

36	public void onStopTrackingTouch(SeekBar seekBar) {

37	this.textView2.setText("拖动完毕");

38

39

}

40

}