Android8.0版本 Small.createObject("fragment-v4", fragments[position], MainActivity.this)方法报错

[EilianLiu]

• 我已阅读并理解 贡献指南，严格遵循其约定。

错误报告

E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.tsou.liquorspring, PID: 24733
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v4.app.Fragment.setMenuVisibility(boolean)' on a null object reference
at android.support.v4.app.FragmentStatePagerAdapter.instantiateItem(FragmentStatePagerAdapter.java:120)
at android.support.v4.view.ViewPager.addNewItem(ViewPager.java:1034)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1182)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1116)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1642)
at android.view.View.measure(View.java:23265)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:958)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:685)
at android.view.View.measure(View.java:23265)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:139)
at android.view.View.measure(View.java:23265)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1514)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:806)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:685)
at android.view.View.measure(View.java:23265)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at android.view.View.measure(View.java:23265)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1514)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:806)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:685)
at android.view.View.measure(View.java:23265)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at com.android.internal.policy.DecorView.onMeasure(DecorView.java:898)
at android.view.View.measure(View.java:23265)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2873)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1910)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2165)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1779)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7810)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:911)
at android.view.Choreographer.doCallbacks(Choreographer.java:723)
at android.view.Choreographer.doFrame(Choreographer.java:658)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:897)
at android.os.Handler.handleCallback(Handler.java:789)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6938)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)

你做了什么？

在宿主App中使用了ViewPager，创建DemandAdapter 之后，Small.createObject("fragment-v4", fragments[position], MainActivity.this);获取不到fragment

public class DemandAdapter extends FragmentStatePagerAdapter {

    public DemandAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int position) {
        Fragment fragment = Small.createObject("fragment-v4", fragments[position], MainActivity.this);
        return fragment;
    }

    @Override
    public int getCount() {
        return tabIcons.length;
    }

}

最终定位到 mApplicableLauncher 获取不到值，为null，launcher.resolveBundle(this)一直为false

protected void prepareForLaunch() {
if (mIntent != null) return;
if (mApplicableLauncher == null && sBundleLaunchers != null) {
for (BundleLauncher launcher : sBundleLaunchers) {
if (launcher.resolveBundle(this)) {
mApplicableLauncher = launcher;
break;
}
}
}
}

Compile-time

  gradle-small plugin : 1.5.0-beta2 (project)
            small aar : 1.5.0-beta2 (project)
       

Runtime

  Device : Samsung S9+
     SDK : Android 8.0