Błąd pompowania widoku klasy wewnętrznej

Question

Próbuję nadmuchać widok wewnętrznej klasy i uzyskać problem "klasy zawyżania błędów". Wymieniłem this post, co było pomocne, ale wciąż nie wiem, dlaczego nie mogę tego zrobić.

Oto fragment kodu, mój XML i logcat.

Edycja: Również zauważyłem, że stany logcat "nie taka metoda wyjątków" za „CupcakeMessageView (Context, AttributeSet) kiedy wyraźnie go mieć

Dzięki wszystkim

public class CupcakeMessage extends Activity { 

    class CupcakeMessageView extends View { 
     private static final int TEXT_SIZE = 12; 
     private static final int X_OFFSET = 15; 

     private Paint mPaint; 

     public CupcakeMessageView(Context context) { 
      super(context); 
     } 

     public CupcakeMessageView(Context context, AttributeSet attrs) { 
      super(context, attrs); 
      mContext = context; 
      ... 
     } 

     more class stuff... 
    } 

    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState);   
     setContentView(R.layout.cupcake_message); 

     ...  
    } 
} 

Oto.! XML

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" > 

    <view class="com.cmllc.zcc.CupcakeMessage$CupcakeMessageView" 
     android:id="@+id/cupcake_message_view" 
     android:screenOrientation="portrait" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" /> 
    more views... 

Logcat:

12-19 09:31:24.249: ERROR/AndroidRuntime(5435): FATAL EXCEPTION: main 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.cmllc.zcc/com.cmllc.zcc.CupcakeMessage}: android.view.InflateException: Binary XML file line #7: Error inflating class com.cmllc.zcc.CupcakeMessage$CupcakeMessageView 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at android.app.ActivityThread.access$2300(ActivityThread.java:125) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at android.os.Handler.dispatchMessage(Handler.java:99) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at android.os.Looper.loop(Looper.java:123) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at android.app.ActivityThread.main(ActivityThread.java:4627) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at java.lang.reflect.Method.invokeNative(Native Method) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at java.lang.reflect.Method.invoke(Method.java:521) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at dalvik.system.NativeStart.main(Native Method) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435): Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class com.cmllc.zcc.CupcakeMessage$CupcakeMessageView 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at android.view.LayoutInflater.createView(LayoutInflater.java:503) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:565) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at android.view.LayoutInflater.rInflate(LayoutInflater.java:618) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at android.view.LayoutInflater.inflate(LayoutInflater.java:407) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at android.view.LayoutInflater.inflate(LayoutInflater.java:320) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at android.view.LayoutInflater.inflate(LayoutInflater.java:276) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:198) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at android.app.Activity.setContentView(Activity.java:1647) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at com.cmllc.zcc.CupcakeMessage.onCreate(CupcakeMessage.java:119) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  ... 11 more 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435): Caused by: java.lang.NoSuchMethodException: CupcakeMessageView(Context,AttributeSet) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at java.lang.Class.getMatchingConstructor(Class.java:660) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at java.lang.Class.getConstructor(Class.java:477) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  at android.view.LayoutInflater.createView(LayoutInflater.java:475) 
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):  ... 21 more 

Answer 1

Musisz dodać public static do wewnętrznej klasy.

• public ponieważ musi być widoczny z zewnątrz.
• static ponieważ jeśli nie, będziesz potrzebować CupcakeMessage, aby utworzyć instancję.

Mimo wszystko, polecam wykonanie View w oddzielnej klasie.