Android ViewPager 異常 Unable to find resource ID

最近在封裝自定義View，由於用到了viewPager,又不想建立多餘的佈局文件，索性直接在JAVA中建立組件。，可是遇到了下面這個異常：


 android.content.res.Resources$NotFoundException: Unable to find resource ID #0xffffffff
            at android.content.res.Resources.getResourceName(Resources.java:2689)
            at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1059)
            at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1248)
            at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:738)
            at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1613)
            at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:570)
            at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:141)
            at android.support.v4.view.ViewPager.populate(ViewPager.java:1106)
            at android.support.v4.view.ViewPager.populate(ViewPager.java:952)
            at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1474)
            at android.view.View.measure(View.java:17388)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5353)
            at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1410)
            at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:1052)
            at android.widget.LinearLayout.onMeasure(LinearLayout.java:590)
            at android.view.View.measure(View.java:17388)
            at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:719)
            at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:455)
            at android.view.View.measure(View.java:17388)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5353)
            at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
            at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:135)
            at android.view.View.measure(View.java:17388)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5353)
            at android.support.v7.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:391)
            at android.view.View.measure(View.java:17388)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5353)
            at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
            at android.view.View.measure(View.java:17388)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5353)
            at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1410)
            at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
            at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
            at android.view.View.measure(View.java:17388)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5353)
            at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
            at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2533)
            at android.view.View.measure(View.java:17388)
            at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2217)
            at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1354)
            at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1553)
            at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1238)
            at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6473)
            at android.view.Choreographer$CallbackRecord.run(Choreographer.java:803)
            at android.view.Choreographer.doCallbacks(Choreographer.java:603)
            at android.view.Choreographer.doFrame(Choreographer.java:573)
            at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:789)
            at android.os.Handler.handleCallback(Handler.java:733)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:157)
            at android.app.ActivityThread.main(ActivityThread.java:5387)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
            at dalvik.system.NativeStart.main(Native Method)

解決方法：就是在：給viewPager設置一個id就行，若是相似我這種需求，就建個ids.xml文件在裏面加一個id就搞定，例如：

<?xml version="1.0" encoding="utf-8" ?>
<resources>
    <item type="id" name="test"/>
</resources>

而後代碼中：

mViewPager.setId(R.id.test);

我不肯定其餘空間是否也可能出現這種狀況，可是若是出現這種Exception，解決方案也是給個ID就萬事大吉了。

下面給出拋異常的源碼：

    public String getResourceName(@AnyRes int resid) throws NotFoundException {
        String str = mAssets.getResourceName(resid);
        if (str != null) return str;
        throw new NotFoundException("Unable to find resource ID #0x"
                + Integer.toHexString(resid));
    }