Android resource compiler의 한계...

아래의 간단한 layout xml을 보자...

<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@+id/button" <=== 여기

    tools:context=".MainActivity" >

    <Button

        android:id="@+id/button"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="say hello" />

</RelativeLayout>

자... paddingTop에는 당연히 dimension이 들어가야 한다. 그런데... 일부로 엉뚱하게도 '@+id/button'을 넣어봤다.

그런데.. compile error가 발생하지 않는다.!

resource compiler가 실제 id를 찾아서 id의 type을 읽어서 판단해 주지는 못하는 것으로 보인다.

대신 runtime에 아래와 같은 error를 발생시킨다.

11-09 02:47:49.750: E/AndroidRuntime(975): FATAL EXCEPTION: main

11-09 02:47:49.750: E/AndroidRuntime(975): Process: com.example.ttstest, PID: 975

11-09 02:47:49.750: E/AndroidRuntime(975): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.ttstest/com.example.ttstest.MainActivity}: android.view.InflateException: Binary XML file line #1: Error inflating class android.widget.RelativeLayout

11-09 02:47:49.750: E/AndroidRuntime(975): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2176)

11-09 02:47:49.750: E/AndroidRuntime(975): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2226)

11-09 02:47:49.750: E/AndroidRuntime(975): at android.app.ActivityThread.access$700(ActivityThread.java:135)

11-09 02:47:49.750: E/AndroidRuntime(975): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1397)

11-09 02:47:49.750: E/AndroidRuntime(975): at android.os.Handler.dispatchMessage(Handler.java:102)

11-09 02:47:49.750: E/AndroidRuntime(975): at android.os.Looper.loop(Looper.java:137)

11-09 02:47:49.750: E/AndroidRuntime(975): at android.app.ActivityThread.main(ActivityThread.java:4998)

11-09 02:47:49.750: E/AndroidRuntime(975): at java.lang.reflect.Method.invokeNative(Native Method)

11-09 02:47:49.750: E/AndroidRuntime(975): at java.lang.reflect.Method.invoke(Method.java:515)

11-09 02:47:49.750: E/AndroidRuntime(975): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777)

11-09 02:47:49.750: E/AndroidRuntime(975): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:593)

11-09 02:47:49.750: E/AndroidRuntime(975): at dalvik.system.NativeStart.main(Native Method)

11-09 02:47:49.750: E/AndroidRuntime(975): Caused by: android.view.InflateException: Binary XML file line #1: Error inflating class android.widget.RelativeLayout

11-09 02:47:49.750: E/AndroidRuntime(975): at android.view.LayoutInflater.createView(LayoutInflater.java:620)

11-09 02:47:49.750: E/AndroidRuntime(975): at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)

11-09 02:47:49.750: E/AndroidRuntime(975): at android.view.LayoutInflater.onCreateView(LayoutInflater.java:669)

11-09 02:47:49.750: E/AndroidRuntime(975): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:694)

11-09 02:47:49.750: E/AndroidRuntime(975): at android.view.LayoutInflater.inflate(LayoutInflater.java:469)

11-09 02:47:49.750: E/AndroidRuntime(975): at android.view.LayoutInflater.inflate(LayoutInflater.java:397)

11-09 02:47:49.750: E/AndroidRuntime(975): at android.view.LayoutInflater.inflate(LayoutInflater.java:353)

11-09 02:47:49.750: E/AndroidRuntime(975): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:290)

11-09 02:47:49.750: E/AndroidRuntime(975): at android.app.Activity.setContentView(Activity.java:1928)

11-09 02:47:49.750: E/AndroidRuntime(975): at com.example.ttstest.MainActivity.onCreate(MainActivity.java:23)

11-09 02:47:49.750: E/AndroidRuntime(975): at android.app.Activity.performCreate(Activity.java:5243)

11-09 02:47:49.750: E/AndroidRuntime(975): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)

11-09 02:47:49.750: E/AndroidRuntime(975): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2140)

11-09 02:47:49.750: E/AndroidRuntime(975): ... 11 more

11-09 02:47:49.750: E/AndroidRuntime(975): Caused by: java.lang.reflect.InvocationTargetException

11-09 02:47:49.750: E/AndroidRuntime(975): at java.lang.reflect.Constructor.constructNative(Native Method)

11-09 02:47:49.750: E/AndroidRuntime(975): at java.lang.reflect.Constructor.newInstance(Constructor.java:423)

11-09 02:47:49.750: E/AndroidRuntime(975): at android.view.LayoutInflater.createView(LayoutInflater.java:594)

11-09 02:47:49.750: E/AndroidRuntime(975): ... 23 more

11-09 02:47:49.750: E/AndroidRuntime(975): Caused by: java.lang.UnsupportedOperationException: Can't convert to dimension: type=0x12

11-09 02:47:49.750: E/AndroidRuntime(975): at android.content.res.TypedArray.getDimensionPixelSize(TypedArray.java:464)

11-09 02:47:49.750: E/AndroidRuntime(975): at android.view.View.<init>(View.java:3560)

11-09 02:47:49.750: E/AndroidRuntime(975): at android.view.View.<init>(View.java:3475)

11-09 02:47:49.750: E/AndroidRuntime(975): at android.view.ViewGroup.<init>(ViewGroup.java:464)

11-09 02:47:49.750: E/AndroidRuntime(975): at android.widget.RelativeLayout.<init>(RelativeLayout.java:236)

11-09 02:47:49.750: E/AndroidRuntime(975): ... 26 more

쩝... layout을 작성할때는.. 항상 조심하자...

compiler가 이런걸 걸러주지 못하니... 조심스럽게 작성해야 할 수 밖에...