Question

我正在努力制作一个定制的评级栏。我试图制作一个定制的风格

       <style
      name="customRatingbar" parent="@android:style/Widget.RatingBar">
    <item name="android:progressDrawable">@drawable/layerlist_ratingbar</item>
    <item name="android:maxHeight">48dp</item>
    <item name="android:minHeight">48dp</item>
       </style>

layerlist_ratingbar是

     <layer-list xmlns:android="http://schemas.android.com/apk/res  /android">                                 

       <item android:id="@android:id/background"android:drawable="@drawable/rating_bar_empty" />

        <item android:id="@android:id/secondaryProgress"android:drawable="@drawable/rating_bar_empty" />

        <item android:id="@android:id/progress"android:drawable="@drawable/rating_bar_fill" />

     </layer-list>

rating_bar_empty：

<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item 
    android:state_focused="true"
    android:state_window_focused="true"
    android:drawable="@drawable/ic_rate_empty"></item>
<item 
    android:state_selected="true"
    android:state_window_focused="true"
    android:drawable="@drawable/ic_rate_empty"
    ></item>
<item 
    android:state_pressed="true"
    android:state_window_focused="true"
    android:drawable="@drawable/ic_rate_empty" ></item>


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

   </selector>

rating_bar_fill：

     <selector xmlns:android="http://schemas.android.com/apk/re/android">
    <item 
      android:state_focused="true"
      android:state_window_focused="true"
      android:drawable="@drawable/ic_rate_full"></item>
<item 
    android:state_selected="true"
    android:state_window_focused="true"
    android:drawable="@drawable/ic_rate_full"
    ></item>
<item 
    android:state_pressed="true"
    android:state_window_focused="true"
    android:drawable="@drawable/ic_rate_full" ></item>


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

我的控制台看起来很像

   12-10 15:30:05.540: E/AndroidRuntime(17129): FATAL EXCEPTION: main
12-10 15:30:05.540: E/AndroidRuntime(17129): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.syntax.customratingbar/com.syntax.customratingbar.MainActivity}: android.view.InflateException: Binary XML file line #11: Error inflating class android.widget.RatingBar
12-10 15:30:05.540: E/AndroidRuntime(17129):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)
12-10 15:30:05.540: E/AndroidRuntime(17129):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2377)
12-10 15:30:05.540: E/AndroidRuntime(17129):    at android.app.ActivityThread.access$600(ActivityThread.java:167)
12-10 15:30:05.540: E/AndroidRuntime(17129):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1356)
12-10 15:30:05.540: E/AndroidRuntime(17129):    at android.os.Handler.dispatchMessage(Handler.java:99)
12-10 15:30:05.540: E/AndroidRuntime(17129):    at android.os.Looper.loop(Looper.java:153)
12-10 15:30:05.540: E/AndroidRuntime(17129):    at android.app.ActivityThread.main(ActivityThread.java:5341)
12-10 15:30:05.540: E/AndroidRuntime(17129):    at java.lang.reflect.Method.invokeNative(Native Method)
12-10 15:30:05.540: E/AndroidRuntime(17129):    at java.lang.reflect.Method.invoke(Method.java:511)
12-10 15:30:05.540: E/AndroidRuntime(17129):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:929)
12-10 15:30:05.540: E/AndroidRuntime(17129):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:696)
12-10 15:30:05.540: E/AndroidRuntime(17129):    at dalvik.system.NativeStart.main(Native Method)
12-10 15:30:05.540: E/AndroidRuntime(17129): Caused by: android.view.InflateException: Binary XML file line #11: Error inflating class android.widget.RatingBar
12-10 15:30:05.540: E/AndroidRuntime(17129):    at android.view.LayoutInflater.createView(LayoutInflater.java:613)
12-10 15:30:05.540: E/AndroidRuntime(17129):    at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
12-10 15:30:05.540: E/AndroidRuntime(17129):    at android.view.LayoutInflater.onCreateView(LayoutInflater.java:660)
12-10 15:30:05.540: E/AndroidRuntime(17129):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:685)
12-10 15:30:05.540: E/AndroidRuntime(17129):    at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)

activity_main xml

在xml中我只是改变我的评级栏的背景

 <RatingBar 
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@style/customRatingbar"
    android:numStars="4"
    android:rating="3.0"
    android:id="@+id/myRatingBar"
    android:isIndicator="true"/>

Answer 1

更改

android:background="@style/customRatingbar"

到

style="@style/CustomRatingBar"

空指针异常在“@android：style / Widget.RatingBar

1 个答案: