SeekBar的用法和自定义滑块的样式

SeekBar继承自ProgressBar，所以基本一样，我们自定义一般也就是顶一个滑块的图片而已。

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="com.kale.seekbar.MainActivity" >

    <!--  android:thumb="@drawable/ic_launcher" 设置滑块的图片 -->
    <SeekBar
        android:id="@+id/seekBar_id"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:max="100"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:thumb="@drawable/ic_launcher"
        android:layout_marginTop="74dp" /></RelativeLayout>

MainActivity.java

package com.kale.seekbar;

import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.widget.SeekBar;
import android.widget.Toast;
import android.widget.SeekBar.OnSeekBarChangeListener;

public class MainActivity extends ActionBarActivity {

    SeekBar sBar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        sBar = (SeekBar)findViewById(R.id.seekBar_id);
        sBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
            private int progress = 0;
            @Override
            public void onStopTrackingTouch(SeekBar arg0) {
                System.out.println(progress);
                Toast.makeText(getApplicationContext(),"当前进度 = "+progress, 0).show();
            }

            @Override
            public void onStartTrackingTouch(SeekBar arg0) {
            }

            @Override
            public void onProgressChanged(SeekBar arg0, int p, boolean arg2) {
                progress = p;
            }
        });
    }

}