NullPoinererror inspiegabile quando si fa riferimento a Drawable su API <8

Question

Ho un'app che funziona come previsto quando eseguito su API 8, ma quando la eseguo su qualsiasi versione API più vecchia, si blocca con:

10-28 12:10:50.755: ERROR/AndroidRuntime(1864): Uncaught handler: thread main exiting due to uncaught exception
10-28 12:10:50.765: ERROR/AndroidRuntime(1864): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.nw.caremeter/com.nw.caremeter.CareMeter}: android.view.InflateException: Binary XML file line #35: Error inflating class <unknown>
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2596)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2621)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.app.ActivityThread.access$2200(ActivityThread.java:126)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1932)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.os.Handler.dispatchMessage(Handler.java:99)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.os.Looper.loop(Looper.java:123)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.app.ActivityThread.main(ActivityThread.java:4595)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at java.lang.reflect.Method.invokeNative(Native Method)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at java.lang.reflect.Method.invoke(Method.java:521)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at dalvik.system.NativeStart.main(Native Method)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864): Caused by: android.view.InflateException: Binary XML file line #35: Error inflating class <unknown>
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.view.LayoutInflater.createView(LayoutInflater.java:513)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:563)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.view.LayoutInflater.rInflate(LayoutInflater.java:618)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:207)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.app.Activity.setContentView(Activity.java:1629)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at com.nw.caremeter.onCreate(CareMeter.java:48)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2544)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     ... 11 more
10-28 12:10:50.765: ERROR/AndroidRuntime(1864): Caused by: java.lang.reflect.InvocationTargetException
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.widget.ImageView.<init>(ImageView.java:105)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at java.lang.reflect.Constructor.constructNative(Native Method)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at java.lang.reflect.Constructor.newInstance(Constructor.java:446)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.view.LayoutInflater.createView(LayoutInflater.java:500)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     ... 22 more
10-28 12:10:50.765: ERROR/AndroidRuntime(1864): Caused by: android.content.res.Resources$NotFoundException: File res/drawable/needle_green.xml from drawable resource ID #0x7f020005
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.content.res.Resources.loadDrawable(Resources.java:1693)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.content.res.TypedArray.getDrawable(TypedArray.java:548)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.widget.ImageView.<init>(ImageView.java:115)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     ... 26 more
10-28 12:10:50.765: ERROR/AndroidRuntime(1864): Caused by: java.lang.NullPointerException
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.graphics.drawable.RotateDrawable.inflate(RotateDrawable.java:207)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:788)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.graphics.drawable.Drawable.createFromXml(Drawable.java:729)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     at android.content.res.Resources.loadDrawable(Resources.java:1690)
10-28 12:10:50.765: ERROR/AndroidRuntime(1864):     ... 28 more

Quali ragioni potrebbero esserci per questo fallimento su API7? Le mie risorse disegnabili sono in res /disegnabile (ho provato a fare copie /disegnabili e il problema persiste indipendentemente dalle cartelle disegnabili- {hdpi, ldpi}). Per completezza, Needle_Green.xml:

<?xml version="1.0" encoding="UTF-8"?>
<rotate         xmlns:android="http://schemas.android.com/apk/res/android"
                android:fromDegrees="90"
                android:toDegrees="90"
                android:pivotY="125"
                android:drawable="@drawable/needle_base_green" />

E Needle_Base_Green:

<?xml version="1.0" encoding="UTF-8"?>
<shape          xmlns:android="http://schemas.android.com/apk/res/android"
                android:shape="line">
    <stroke     android:width="2dp"
                android:color="#00ff00" />
</shape>

Questa è praticamente una prima app Android, quindi è probabilmente qualcosa di scioccante. Grazie per qualsiasi aiuto.

Answer 1

Android non è in grado di trovare Res/Drawable/Needle_Green.xml. Ce l'hai, se non ci mostra il codice.

Aggiunto:Prova a utilizzare #ffff0000 (i primi due sono alfa) come valore di colore

Answer 2

Android guarda in Res/Drawable, non in Res/Drawables.