Android控件之SeekBar的用法总结

package com.skywang.control;

import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.widget.TextView;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;

public class SeekBarTest extends Activity implements SeekBar.OnSeekBarChangeListener{
  private static final String TAG = "SKYWANG";

  // 与“系统默认SeekBar”对应的TextView
  private TextView mTvDef;
  // 与“自定义SeekBar”对应的TextView
  private TextView mTvSelf;
  // “系统默认SeekBar”
  private SeekBar mSeekBarDef;
  // “自定义SeekBar”
  private SeekBar mSeekBarSelf;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.seek_bar_test);
    
    // 与“系统默认SeekBar”对应的TextView
    mTvDef = (TextView) findViewById(R.id.tv_def);
    // “系统默认SeekBar”
    mSeekBarDef = (SeekBar) findViewById(R.id.seekbar_def);
    mSeekBarDef.setOnSeekBarChangeListener(this);

    // 与“自定义SeekBar”对应的TextView
    mTvSelf = (TextView) findViewById(R.id.tv_self);
    // “自定义SeekBar”
    mSeekBarSelf = (SeekBar) findViewById(R.id.seekbar_self);
    mSeekBarSelf.setOnSeekBarChangeListener(this);
  }  
  
  /*
   * SeekBar停止滚动的回调函数
   */
  @Override
  public void onStopTrackingTouch(SeekBar seekBar) {
    
  }

  /*
   * SeekBar开始滚动的回调函数
   */
  @Override
  public void onStartTrackingTouch(SeekBar seekBar) {

  }

  /*
   * SeekBar滚动时的回调函数
   */
  @Override
  public void onProgressChanged(SeekBar seekBar, int progress,
      boolean fromUser) {
    Log.d(TAG, "seekid:"+seekBar.getId()+", progess"+progress);
    switch(seekBar.getId()) {
      case R.id.seekbar_def:{
        // 设置“与系统默认SeekBar对应的TextView”的值
        mTvDef.setText(getResources().getString(R.string.text_def)+" : "+String.valueOf(seekBar.getProgress()));
        break;
      }
      case R.id.seekbar_self: {
        // 设置“与自定义SeekBar对应的TextView”的值        
        mTvSelf.setText(getResources().getString(R.string.text_self)+" : "+String.valueOf(seekBar.getProgress()));
        break;
      }
      default:
        break;
    }
  }
}

<LinearLayout 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:orientation="vertical" >
  
  <TextView
    android:id="@+id/tv_def"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/text_def" />
  
  <!-- 
    max=100,代表它的取值范围是0-100,共101个值;
    progress=10,代表默认值是10 
  -->
  <SeekBar
    android:id="@+id/seekbar_def"
    android:layout_width="620px"
    android:layout_height="wrap_content"
    android:max="100"
    android:progress="10"
    />
  
  <TextView
    android:id="@+id/tv_self"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/text_self" />
  
  <!-- 
    max=100,代表它的取值范围是0-100,共101个值;
    progress=20,代表默认值是20
    progressDrawable,表示SeekBar的背景图片
    thumbe,表示SeekBar的滑块图片 
  -->
  <SeekBar
    android:id="@+id/seekbar_self"
    android:layout_width="620px" 
    android:layout_height="wrap_content"
    android:max="100"
    android:progress="20"
    android:progressDrawable="@drawable/bg_bar" 
    android:thumb="@drawable/thumb_bar" /> 
  
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
  <!-- 背景图 -->
  <item android:id="@+android:id/background" android:drawable="@drawable/bar_dn" />
  <!-- 第二进度图 -->
  <item android:id="@+android:id/SecondaryProgress" android:drawable="@drawable/bar_dn" />
  <!-- 进度度 -->
  <item android:id="@+android:id/progress" android:drawable="@drawable/bar_up" />
</layer-list>

<?xml version="1.0" encoding="UTF-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
  <!-- 按下状态 -->
  <item android:state_pressed="true"
    android:drawable="@drawable/thumb_dn" />

  <!-- 焦点状态 -->
  <item android:state_focused="true"
    android:drawable="@drawable/thumb_up" />
  
  <!-- 默认状态 -->
  <item android:drawable="@drawable/thumb_up" /> 
  
</selector> 

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="com.skywang.control"
  android:versionCode="1"
  android:versionName="1.0" >

  <uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="17" />

  <application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
      android:name="com.skywang.control.SeekBarTest"
      android:label="@string/app_name" >
      <intent-filter>
        <action android:name="android.intent.action.MAIN" />

        <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
    </activity>
  </application>

</manifest>