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SeekBar

譯者:madgoat

博客:http://madgoat.cn/

2010-10-22

版本:Android 2.2 r1

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public class SeekBar extends AbsSeekBar

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java.lang.Object

???????? android.view.View

? ???? ???????? android.widget.ProgressBar

??????????????????????????? android.widget.AbsSeekBar

???????????????????????????????????? android.widget.SeekBar

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概述

????????

SeekBarProgressBar的擴(kuò)展,在其基礎(chǔ)上增加了一個(gè)可滑動(dòng)的滑片(注:就是那個(gè)可拖動(dòng)的圖標(biāo))。用戶可以觸摸滑片并向左或向右拖動(dòng),再或者可以使用方向鍵都可以設(shè)置當(dāng)前的進(jìn)度等級(jí)。不建議把可以獲取焦點(diǎn)的widget放在SeekBar的左邊或右邊。

SeekBar可以附加一個(gè)SeekBar.OnSeekBarChangeListener以獲得用戶操作的通知。

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內(nèi)部類

???????? 接口 ?????? SeekBar.OnSeekBarChangeListener ?????

???????? 一個(gè)回調(diào)函數(shù)用來當(dāng)進(jìn)度等級(jí)發(fā)生改變時(shí)通知客戶端

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XML屬性

屬性名稱

描述

android:thumb

Seekbar上繪制的thumb(可拖動(dòng)的那個(gè)圖標(biāo))

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公共方法???????

???????? public void setOnSeekBarChangeListener (SeekBar.OnSeekBarChangeListener l)

設(shè)置一個(gè)監(jiān)聽器以接受seekbar進(jìn)度改變時(shí)的通知。同時(shí)提供用戶在SeekBar上開始和停止觸摸手勢時(shí)的通知。

參數(shù)

l??????? SeekBar的通知監(jiān)聽對(duì)象

參見

SeekBar.OnSeekBarChangeListener

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補(bǔ)充

???????? 文章鏈接

android里做一個(gè)豎著的seekbar

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

Android UI設(shè)計(jì) SeekBar拖動(dòng)條用法

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

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例子

Java

import android.app.Activity;

import android.os.Bundle;

import android.widget.SeekBar;

import android.widget.Toast;

import android.widget.SeekBar.OnSeekBarChangeListener;

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public class SeekBarDemo extends Activity {

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???????? @Override

???????? protected void onCreate(Bundle savedInstanceState) {

?????????????????? // TODO Auto-generated method stub

?????????????????? super.onCreate(savedInstanceState);

?????????????????? setContentView(R.layout.seekbardemo);

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

?????????????????? seekBar1.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

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??????????????????????????? @Override

??????????????????????????? public void onStopTrackingTouch(SeekBar seekBar) {

???????????????????????????????????? // TODO Auto-generated method stub

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??????????????????????????? }

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??????????????????????????? @Override

??????????????????????????? public void onStartTrackingTouch(SeekBar seekBar) {

???????????????????????????????????? // TODO Auto-generated method stub

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??????????????????????????? }

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??????????????????????????? @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();

??????????????????????????? }

?????????????????? });

???????? }

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}

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XML:

<?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"

>?

???????? <SeekBar android:id="@+id/seekBar1" android:layout_width="fill_parent"

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

???????? ></SeekBar>

</LinearLayout>

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整理人:農(nóng)民伯伯

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