根据预发布报告，由于 FragmentActivity 在某些设备上失败而入职 activity

Question

Android 新来的。任何帮助表示赞赏。所以我将我的应用程序发布到 Google Play 控制台。我在做发布前报告时遇到了一些问题。该应用程序在 4 台设备运行ning Android 6 和 7 上失败。问题在于入职 activity。我已经展示了 OnBoardActivity class 和其中一个 OnboardingFragments（除了每个透视布局中的图片不同之外，它们都是相同的（R.id.onboardingscreen_1，R.id.onboardingscreen_2, 等等).

我发现致命崩溃是一个内存问题 "Caused by: java.lang.OutOfMemoryError: Failed to allocate a 132710412 byte allocation with 33554432 free bytes and 120MB until OOM." logcat 中引起我注意的那一行让我认为这是一个 OnBoardActivity 问题：

" 在 Util.OnboardingFragment2.onCreateView(OnboardingFragment2.java:21)"

其中 3 个设备出现故障。

Galaxy J7 因 logcat 中的差异而失败：

"java.lang.IllegalStateException: Fragment already added: OnboardingFragment3{fe12a94 #2 id=0x7f0a0099}"

我不知道为什么我的应用会尝试分配 132 MB？？？我无法用模拟器重新创建其中任何一个。当我查看应用程序崩溃的视频时，这 4 台设备在第一次启动时是正确的。它要么在尝试启动 OnBoardActivity 时失败，要么在移动到下一个或上一个入职片段时失败。

我不知道该怎么办！我需要一些关于第一个运行的快速说明。我确信我正在适当地启动 OnBoardActivity（从 MainActivity）：

        prefs = getSharedPreferences(Util.APP_NAME, MODE_PRIVATE);

    if(!prefs.getBoolean("onboarding_complete", false)){
        Intent intent = new Intent(this, OnBoardActivity.class);
        startActivity(intent);

        finish();
        return;
    }

Google提供的这4次失败的log是：

<!-- language: lang-none -->
Caused by: android.view.InflateException: Binary XML file line #26: Error inflating class <unknown>
Caused by: java.lang.reflect.InvocationTargetException
    at java.lang.reflect.Constructor.newInstance0(Native Method)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:430)
    at android.view.LayoutInflater.createView(LayoutInflater.java:645)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:787)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:727)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:858)
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:861)
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:518)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:426)
    at Util.OnboardingFragment2.onCreateView(OnboardingFragment2.java:21)
    at android.support.v4.app.Fragment.performCreateView(Fragment.java:2346)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1428)
    at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1759)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1827)
    at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:797)
    at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2596)
    at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2383)
    at android.support.v4.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2338)
    at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:2215)
    at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:649)
    at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:167)
    at android.support.v4.view.ViewPager.populate(ViewPager.java:1238)
    at android.support.v4.view.ViewPager.populate(ViewPager.java:1086)
    at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1616)
    at android.view.View.measure(View.java:19834)
    at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:715)
    at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:461)
    at android.view.View.measure(View.java:19834)
    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6164)
    at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
    at android.view.View.measure(View.java:19834)
    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6164)
    at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1464)
    at android.widget.LinearLayout.measureVertical(LinearLayout.java:758)
    at android.widget.LinearLayout.onMeasure(LinearLayout.java:640)
    at android.view.View.measure(View.java:19834)
    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6164)
    at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
    at com.android.internal.policy.DecorView.onMeasure(DecorView.java:692)
    at android.view.View.measure(View.java:19834)
    at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2358)
    at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1430)
    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1679)
    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1306)
    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6579)
    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:871)
    at android.view.Choreographer.doCallbacks(Choreographer.java:683)
    at android.view.Choreographer.doFrame(Choreographer.java:619)
    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:857)
    at android.os.Handler.handleCallback(Handler.java:751)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:154)
    at android.app.ActivityThread.main(ActivityThread.java:6316)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:872)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:762)
Caused by: java.lang.OutOfMemoryError: Failed to allocate a 132710412 byte allocation with 33554432 free bytes and 120MB until OOM
    at dalvik.system.VMRuntime.newNonMovableArray(Native Method)
    at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
    at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:620)
    at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:455)
    at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:1152)
    at android.content.res.ResourcesImpl.loadDrawableForCookie(ResourcesImpl.java:859)
    at android.content.res.ResourcesImpl.loadDrawable(ResourcesImpl.java:710)
    at android.content.res.Resources.getDrawable(Resources.java:776)
    at android.content.Context.getDrawable(Context.java:530)
    at android.support.v4.content.ContextCompat.getDrawable(ContextCompat.java:358)
    at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:198)
    at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:186)
    at android.support.v7.content.res.AppCompatResources.getDrawable(AppCompatResources.java:100)
    at android.support.v7.widget.AppCompatImageHelper.loadFromAttributes(AppCompatImageHelper.java:58)
    at android.support.v7.widget.AppCompatImageView.<init>(AppCompatImageView.java:77)
    at android.support.v7.widget.AppCompatImageView.<init>(AppCompatImageView.java:67)
    ... 58 more

代码如下：

public class OnBoardActivity extends FragmentActivity {

private ViewPager pager;
private SmartTabLayout indicatior;
private ButtonFlat skip;
private ButtonFlat next;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_onboarding);

    pager = findViewById(R.id.pager);
    indicatior = findViewById(R.id.indicator);
    skip = findViewById(R.id.skip);
    next = findViewById(R.id.next);

    FragmentStatePagerAdapter adapter = new FragmentStatePagerAdapter(getSupportFragmentManager()) {
        @Override
        public Fragment getItem(int position) {

            List<Fragment> f = getSupportFragmentManager().getFragments();

            for(int i=0; i<f.size(); i++){
                Log.d("Fragment Get", "Fragment: " + Integer.toString(i) + " "
                + f.get(i).getClass().getName());
            }

            Log.d("Fragment Pos", "Position: " + Integer.toString(position));

            switch (position) {
                case 0 :
                    Log.d("Fragment Ret", "Returning new OnboardingFragment1\n");
                    return new OnboardingFragment1();
                case 1 :
                    Log.d("Fragment Ret", "Returning new OnboardingFragment2\n");
                    return new OnboardingFragment2();
                case 2 :
                    Log.d("Fragment Ret", "Returning new OnboardingFragment3\n");
                    return new OnboardingFragment3();
                default: return null;
            }

        }


        @Override
        public int getCount() {
            return 3;
        }

        @Override
        public Parcelable saveState(){
            return null;
        }
    };

    pager.setAdapter(adapter);

    indicatior.setViewPager(pager);

    indicatior.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener(){
        @Override
        public void onPageSelected(int position) {
            if(position == 2){
                skip.setVisibility(View.GONE);
                next.setText("Done");
            } else {
                skip.setVisibility(View.VISIBLE);
                next.setText("Next");
            }
        }
    });

    skip.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            finishOnboarding();
        }
    });

    next.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if(pager.getCurrentItem() == 2){
                finishOnboarding();
            } else {
                pager.setCurrentItem(pager.getCurrentItem() + 1, true);
            }
        }
    });

}

private void finishOnboarding() {

    SharedPreferences preferences =
            getSharedPreferences(Util.APP_NAME, MODE_PRIVATE);

    preferences.edit()
            .putBoolean("onboarding_complete",true).apply();

    Intent intent = new Intent(this, MainActivity.class);
    startActivity(intent);
    finish();
}

}

public class OnboardingFragment1 extends Fragment {

@Override
public View onCreateView(@Nullable LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    setRetainInstance(true);

    return inflater != null ? inflater.inflate(
            R.layout.onboarding_screen1,
            container,
            false
    ) : null;
}

}

希望有人能帮忙！谢谢阅读！ -马特

Answer 1

根据我的评论，我在对片段进行了大量研究后找到了解决方案。有时 FragmentStatePageAdapter 会尝试膨胀它认为已删除但实际上尚未删除的视图。通过将 OnboardingFragment 更改为：

现在效果很好

public class OnboardingFragment1 extends Fragment {
    @Override
    public View onCreateView(@Nullable LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        return getView() !=null ? getView(): inflater.inflate(R.layout.onboarding_screen1, container, false);
}

根据预发布报告，由于 FragmentActivity 在某些设备上失败而入职 activity

Onboarding activity as FragmentActivity failing on certain devices per Pre-launch report

android

android-fragments

android-fragmentactivity

android-studio

google-console-developer