1、简介
RatingBar继承ProgressBar,除了ProgressBar的属性外还有特有属性:
android:isIndicator:是否用作指示,用户无法更改,默认false
android:numStars:显示多少个星星,必须为整数
android:rating:默认评分值,必须为浮点数
android:stepSize: 评分每次增加的值,必须为浮点数 OnRatingBarChangeListener //事件处理
2、简单使用
1)星条的drawable资源layer-list图层:
<?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/rating_off"/>
<item android:id="@android:id/progress"
android:drawable="@drawable/rating_on"/>
</layer-list>
2)在values文件夹下styles.xml文件中添加style:
<style name="roomRatingBar_1" parent="@android:style/Widget.RatingBar">
<item name="android:progressDrawable">@drawable/ratingbar_layer</item>
<item name="android:minHeight">24dip</item>
<item name="android:maxHeight">24dip</item>
</style>
3)星条的xml布局文件:
<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:gravity="center"
android:orientation="vertical"
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=".LoginActivity"> <RatingBar
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/ratingbar"
style="@style/roomRatingBar_1"
android:isIndicator="false"
android:numStars="6"
android:rating="1.5"
android:stepSize="0.25"/> </LinearLayout>
4)Java文件事件处理:
public class LoginActivity extends AppCompatActivity { @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
// Set up the login form. RatingBar ratingBar = (RatingBar)findViewById(R.id.ratingbar);
ratingBar.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() {
@Override
public void onRatingChanged(RatingBar ratingBar, float v, boolean b) {
Toast.makeText(LoginActivity.this,"rating"+String.valueOf(v),Toast.LENGTH_SHORT).show();
}
});
} }