[Android] SeekBar---可拖动进度条

SeekBar---可拖动进度条

（）setMax                        //设置SeekBar最大数值

（）setProgress                 //设置SeekBar当前数值

（）setSecondaryProgress//设置SeekBar第二数值   

监听器:

seekBar = (SeekBar) findViewById(R.id.seekBar);

seekBar.setOnSeekBarChangeListener(this);

// 数值改变

    @Override

    public void onProgressChanged(SeekBar seekBar, int progress,

            boolean fromUser) {

        // TODO Auto-generated method stub

    }

    // 开始拖动

    @Override

    public void onStartTrackingTouch(SeekBar seekBar) {

        // TODO Auto-generated method stub

    }

    // 停止拖动

    @Override

    public void onStopTrackingTouch(SeekBar seekBar) {

        // TODO Auto-generated method stub

    }

自定义SeekBar进度条的样式：

android:progressDrawable="@drawable/seekbar_img"//改变进度条的样式

android:thumb="@drawable/thumb"//改变滑块的样式

下面贴上实例工程代码（自定义处仅演示修改改变滑块的样式）：

MainActivity.java：

package com.Liuyt.s03_e21_seekbar;

import android.app.Activity;

import android.os.Bundle;

import android.widget.SeekBar;

import android.widget.SeekBar.OnSeekBarChangeListener;

import android.widget.TextView;

public class MainActivity extends Activity implements OnSeekBarChangeListener {

    private SeekBar seekBar;

    private TextView tv1;

    private TextView tv2;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        seekBar = (SeekBar) findViewById(R.id.seekBar);

        tv1 = (TextView) findViewById(R.id.textView1);

        tv2 = (TextView) findViewById(R.id.textView2);

        seekBar.setOnSeekBarChangeListener(this);

    }

    // 数值改变

    @Override

    public void onProgressChanged(SeekBar seekBar, int progress,

            boolean fromUser) {

        // TODO Auto-generated method stub

        tv1.setText("正在改变");

        tv2.setText("当前数值"+progress);

    }

    // 开始拖动

    @Override

    public void onStartTrackingTouch(SeekBar seekBar) {

        // TODO Auto-generated method stub

        tv1.setText("开始改变");

    }

    // 停止拖动

    @Override

    public void onStopTrackingTouch(SeekBar seekBar) {

        // TODO Auto-generated method stub

        tv1.setText("停止改变");

    }

}

main.xml:

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

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

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical" >

    <SeekBar

        android:thumb="@drawable/my_thumb"

        android:id="@+id/seekBar"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:max=""

        android:progress="" />

    <TextView

        android:id="@+id/textView1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content" />

    <TextView

        android:id="@+id/textView2"

        android:layout_width="match_parent"

        android:layout_height="wrap_content" />

</LinearLayout>

my_thumb.xml  (selector 用于自定义滑块的一个效果)：

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

<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@drawable/select" android:state_focused="true" android:state_window_focused="true"></item>

    <item android:drawable="@drawable/select" android:state_pressed="true" android:state_window_focused="true"></item>

    <item android:drawable="@drawable/select" android:state_selected="true" android:state_window_focused="true"></item>

    <item android:drawable="@drawable/normal"></item>

</selector>