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テキスト


SeekBar

译者:madgoat

博客:http://madgoat.cn/

2010-10-22

版本:Android 2.2 r1

public classSeekBarextendsAbsSeekBar

java.lang.Object

android.view.View

android.widget.ProgressBar

android.widget.AbsSeekBar

android.widget.SeekBar

概述

SeekBarProgressBar的扩展,在其基础上增加了一个可滑动的滑片(注:就是那个可拖动的图标)。用户可以触摸滑片并向左或向右拖动,再或者可以使用方向键都可以设置当前的进度等级。不建议把可以获取焦点的widget放在SeekBar的左边或右边。

SeekBar可以附加一个SeekBar.OnSeekBarChangeListener以获得用户操作的通知。

内部类

接口SeekBar.OnSeekBarChangeListener

一个回调函数用来当进度等级发生改变时通知客户端

XML属性

属性名称

描述

android:thumb

Seekbar上绘制的thumb(可拖动的那个图标)

公共方法

public void setOnSeekBarChangeListener (SeekBar.OnSeekBarChangeListener l)

设置一个监听器以接受seekbar进度改变时的通知。同时提供用户在SeekBar上开始和停止触摸手势时的通知。

参数

l SeekBar的通知监听对象

参见

SeekBar.OnSeekBarChangeListener

补充

文章链接

android里做一个竖着的seekbar

http://blog.csdn.net/saintswordsman/archive/2010/01/23/5248233.aspx

Android UI设计SeekBar拖动条用法

http://www.pocketdigi.com/20100813/36.html

例子

Java

import android.app.Activity;

import android.os.Bundle;

import android.widget.SeekBar;

import android.widget.Toast;

import android.widget.SeekBar.OnSeekBarChangeListener;

public class SeekBarDemo extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

setContentView(R.layout.seekbardemo);

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

seekBar1.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

@Override

public void onStopTrackingTouch(SeekBar seekBar) {

// TODO Auto-generated method stub

}

@Override

public void onStartTrackingTouch(SeekBar seekBar) {

// TODO Auto-generated method stub

}

@Override

public void onProgressChanged(SeekBar seekBar, int progress,

boolean fromUser) {

// TODO Auto-generated method stub

Toast.makeText(SeekBarDemo.this,

String.valueOf(seekBar1.getProgress()),

Toast.LENGTH_SHORT).show();

}

});

}

}

XML:

android:layout_width="fill_parent" android:layout_height="fill_parent"

>

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

>

整理人:农民伯伯


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