在 xml 布局中导入视图

Question

I'm trying to use AndroidQuickResponseCode in an app I am making. But I have a hard time getting an example to run inside my own app.

I have narrowed down the problem to a reference in a layout file, where it says:

<com.jwetherell.quick_response_code.ViewfinderView
      android:id="@+id/viewfinder_view"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent"
      android:background="@color/transparent">
  </com.jwetherell.quick_response_code.ViewfinderView>

It goes wrong when it tries to render the com.jwetherell.quick_response_code.ViewfinderView in the layout. This it should be able to find in the jar file that I've added as a library. (It finds other files from that jar.) The stacktrace in logcat is rather long, but these lines seem like a summary to me:

11-23 11:22:57.055: E/AndroidRuntime(12552): FATAL EXCEPTION: main
11-23 11:22:57.055: E/AndroidRuntime(12552): Process: se.tii.vargis, PID: 12552
11-23 11:22:57.055: E/AndroidRuntime(12552): java.lang.RuntimeException: Unable to start activity ComponentInfo{se.tii.vargis/se.tii.vargis.CaptureActivity}: android.view.InflateException: Binary XML file line #26: Binary XML file line #26: Error inflating class com.jwetherell.quick_response_code.ViewfinderView
11-23 11:22:57.055: E/AndroidRuntime(12552): Caused by: android.view.InflateException: Binary XML file line #26: Binary XML file line #26: Error inflating class com.jwetherell.quick_response_code.ViewfinderView
11-23 11:22:57.055: E/AndroidRuntime(12552): Caused by: android.view.InflateException: Binary XML file line #26: Error inflating class com.jwetherell.quick_response_code.ViewfinderView
11-23 11:22:57.055: E/AndroidRuntime(12552): Caused by: java.lang.reflect.InvocationTargetException
11-23 11:22:57.055: E/AndroidRuntime(12552): Caused by: android.content.res.Resources$NotFoundException: Resource ID #0x7f04000d

It seems to means that it can't find the com.jwetherell.quick_response_code.ViewfinderView that is written in the xml layout file. Is there any special way on importing something so that it can be used in an xml file?

My Activity code is empty, it only sets the layout with setContentView(R.layout.activity_capture);

Answer 1

See you have to make a class in your project same as https://github.com/phishman3579/android-quick-response-code/blob/master/src/com/jwetherell/quick_response_code/ViewfinderView.java

and then in xml file you have to give the path of that file as your package name is "com.example.SampleHello" + your class name "ViewfinderView" so your xml will be like this

<com.example.SampleHello.ViewfinderView
  android:id="@+id/viewfinder_view"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:background="@color/transparent">
</com.example.SampleHello.ViewfinderView>

Take mouse pointer to the ViewfinderView and click ctrl + click then ViewfinderView class open means it is getting class