Android开发之拖动条和评分组件用法分析

<SeekBar
   android:id="@+id/seek"
   android:layout_marginLeft="20dip"
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"/>

bar=(SeekBar)this.findViewById(R.id.seek);
imageview=(ImageView)this.findViewById(R.id.img);
bar.setMax(5);
bar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
  public void onStopTrackingTouch(SeekBar seekBar) {
    // TODO Auto-generated method stub
  }
  public void onStartTrackingTouch(SeekBar seekBar) {
    // TODO Auto-generated method stub
  }
  public void onProgressChanged(SeekBar seekBar, int progress,
      boolean fromUser) {
    //切换图片
    imageview.setImageResource(imagedata[seekBar.getProgress()]);
  }
});

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
 <item android:id="@+android:id/background"
    android:drawable="@drawable/star_empty"
 />
  <item android:id="@+android:id/secondaryProgress"
    android:drawable="@drawable/star_empty"
 />
  <item android:id="@+android:id/progress"
    android:drawable="@drawable/star_full"
 />
</layer-list>

<?xml version="1.0" encoding="utf-8"?>
<resources>
 <style
  name="ratingbarstyle"
  parent="@android:style/Widget.RatingBar">
  <item name="android:progressDrawable">
    @drawable/starconfig
  </item>
  <item name="android:minHeight">53dip</item>
   <item name="android:maxHeight">53dip</item>
 </style>
</resources>

<RatingBar
    android:id="@+id/rating"
    android:numStars="5"
    android:stepSize="1"
    style="@style/ratingbarstyle"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"/>

rbar.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() {
  public void onRatingChanged(RatingBar ratingBar, float rating,
      boolean fromUser) {
    int num=(int)rating;
    String result=null;
    switch (num) {
    case 1:
      result="非常不满意";
      break;
    case 2:
      result="不满意";
      break;
    case 3:
      result="还可以";
      break;
    case 4:
      result="满意";
      break;
    case 5:
      result="非常满意";
      break;
    default:
      break;
    }
    Toast.makeText(MyDailogActivity.this, result, 1).show();
  }
});