To inflate a View from XML you need to implement the constructors that take an AttributeSet. The constructor that only takes a Context is not invoked when inflating from XML.
On Fri, Mar 25, 2011 at 10:06 PM, Atul Prakash <[email protected]>wrote: > Dear Friends, > > I am trying to inflate View class from xml resource. Moreover i am > following all the conventions of Building Custom Components given on > Android developer site. I have defined View class as subclass of My > Activity class which is as follows: > > public class MyApp extends Activity { > @Override > public void onCreate(Bundle savedInstanceState) { > super.onCreate(savedInstanceState); > setContentView(R.layout.main); > } > public static class MyAppView extends View { > Bitmap menu; > int menudemo[]; > public MyAppView(Context context) { > super(context); > // TODO Auto-generated constructor stub > menudemo = new int[] > {R.drawable.menu,R.drawable.icon}; > } > @Override > public void onDraw(Canvas canvas) { > Resources res = getResources(); > canvas.drawBitmap(BitmapFactory.decodeResource(res, > menudemo[0]), > 0, 0, null); > System.gc(); > invalidate(); > } > } > } > My main.xml is as follows: > <?xml version="1.0" encoding="utf-8"?> > <LinearLayout 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.myapp.MyApp$MyAppView" > android:id="@+id/my" > android:layout_width="fill_parent" > android:layout_height="fill_parent" > /> > <TextView > android:layout_width="fill_parent" > android:layout_height="wrap_content" > android:text="@string/hello" > /> > </LinearLayout> > > I do not know what is wrong with my coding, but when i am running this > application i am getting run time exception like: > > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): FATAL EXCEPTION: main > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): > java.lang.RuntimeException: Unable to start activity > ComponentInfo{com.myapp/com.myapp.MyApp}: > android.view.InflateException: Binary XML file line #7: Error > inflating class com.myapp.MyApp$MyAppView > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > android.app.ActivityThread.performLaunchActivity(ActivityThread.java: > 2663) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > android.app.ActivityThread.handleLaunchActivity(ActivityThread.java: > 2679) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > android.app.ActivityThread.access$2300(ActivityThread.java:125) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > android.os.Handler.dispatchMessage(Handler.java:99) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > android.os.Looper.loop(Looper.java:123) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > android.app.ActivityThread.main(ActivityThread.java:4627) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > java.lang.reflect.Method.invokeNative(Native Method) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > java.lang.reflect.Method.invoke(Method.java:521) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > com.android.internal.os.ZygoteInit > $MethodAndArgsCaller.run(ZygoteInit.java:868) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > dalvik.system.NativeStart.main(Native Method) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): Caused by: > android.view.InflateException: Binary XML file line #7: Error > inflating class com.myapp.MyApp$MyAppView > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > android.view.LayoutInflater.createView(LayoutInflater.java:503) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:565) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > android.view.LayoutInflater.rInflate(LayoutInflater.java:618) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > android.view.LayoutInflater.inflate(LayoutInflater.java:407) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > android.view.LayoutInflater.inflate(LayoutInflater.java:320) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > android.view.LayoutInflater.inflate(LayoutInflater.java:276) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > > com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java: > 198) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > android.app.Activity.setContentView(Activity.java:1647) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > com.myapp.MyApp.onCreate(MyApp.java:23) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > android.app.Instrumentation.callActivityOnCreate(Instrumentation.java: > 1047) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > android.app.ActivityThread.performLaunchActivity(ActivityThread.java: > 2627) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): ... 11 more > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): Caused by: > java.lang.NoSuchMethodException: MyAppView(Context,AttributeSet) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > java.lang.Class.getMatchingConstructor(Class.java:660) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > java.lang.Class.getConstructor(Class.java:477) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): at > android.view.LayoutInflater.createView(LayoutInflater.java:475) > 03-25 12:28:50.842: ERROR/AndroidRuntime(1107): ... 21 more > 03-25 12:28:50.882: WARN/ActivityManager(71): Force finishing > activity com.myapp/.MyApp > 03-25 12:28:51.392: WARN/ActivityManager(71): Activity pause timeout > for HistoryRecord{441c18d0 com.myapp/.MyApp} > 03-25 12:29:01.981: WARN/ActivityManager(71): Activity destroy timeout > for HistoryRecord{441c18d0 com.myapp/.MyApp} > 03-25 12:33:50.912: INFO/Process(1107): Sending signal. PID: 1107 SIG: > 9 > > Please help me to solve this RunTime Exception. > > Thanks & Regards. > > Atul Prakash Singh > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- Romain Guy Android framework engineer [email protected] Note: please don't send private questions to me, as I don't have time to provide private support. All such questions should be posted on public forums, where I and others can see and answer them -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
