Android(安卓)8.0 Activity启动崩溃异常："Only fullscreen opaque activities can request orientation"

今天测试突然提出打开某某页面崩溃，怎么可能，我的代码怎么会有这么到的bug呢，抓紧找出信息如下

崩溃机型：华为荣耀手机
系统版本：Android8.0

日志如下：

java.lang.RuntimeException:  Unable  to  start  activity  ComponentInfo{com.cloudy.linglingbang.test/com.cloudy.linglingbang.activity.fm.FmCommentListActivity}:  java.lang.IllegalStateException:  Only  fullscreen  opaque  activities  can  request  orientationat  android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3303)at  android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3411)at  android.app.ActivityThread.-wrap12(Unknown  Source:0)at  android.app.ActivityThread$H.handleMessage(ActivityThread.java:1994)at  android.os.Handler.dispatchMessage(Handler.java:108)at  android.os.Looper.loop(Looper.java:166)at  android.app.ActivityThread.main(ActivityThread.java:7529)at  java.lang.reflect.Method.invoke(Native  Method)at  com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:245)at  com.android.internal.os.ZygoteInit.main(ZygoteInit.java:921)Caused  by:  java.lang.IllegalStateException:  Only  fullscreen  opaque  activities  can  request  orientationat  android.app.Activity.onCreate(Activity.java:1081)at  android.support.v4.app.SupportActivity.onCreate(ComponentActivity.java:75)at  android.support.v4.app.FragmentActivity.onCreate(FragmentActivity.java:335)at  android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:85)at  com.cloudy.linglingbang.activity.basic.BaseActivity.onCreate(BaseActivity.java:112)at  com.cloudy.linglingbang.activity.fm.FmCommentListActivity.onCreate(FmCommentListActivity.java:32)at  android.app.Activity.performCreate(Activity.java:7383)at  android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1218)at  android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3256)...  9  morejava.lang.IllegalStateException:  Only  fullscreen  opaque  activities  can  request  orientationat  android.app.Activity.onCreate(Activity.java:1081)at  android.support.v4.app.SupportActivity.onCreate(ComponentActivity.java:75)at  android.support.v4.app.FragmentActivity.onCreate(FragmentActivity.java:335)at  android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:85)at  com.cl

通过排查，代码没问题。
于是查找源码
Activity.java（API：26）

 @MainThread    @CallSuper    protected void onCreate(@Nullable Bundle savedInstanceState) {        if (DEBUG_LIFECYCLE) Slog.v(TAG, "onCreate " + this + ": " + savedInstanceState);        if (getApplicationInfo().targetSdkVersion > O && mActivityInfo.isFixedOrientation()) {            final TypedArray ta = obtainStyledAttributes(com.android.internal.R.styleable.Window);            final boolean isTranslucentOrFloating = ActivityInfo.isTranslucentOrFloating(ta);            ta.recycle();            if (isTranslucentOrFloating) {                throw new IllegalStateException(                        "Only fullscreen opaque activities can request orientation");            }        }        ....省略    }

通过代码对比，只有在Android8.0机型上会抛该异常;

继续排查 ActivityInfo源码

     /**     * Returns true if the activity's orientation is fixed.     * @hide     */     public boolean isFixedOrientation() {        return isFixedOrientationLandscape() || isFixedOrientationPortrait()                || screenOrientation == SCREEN_ORIENTATION_LOCKED;    } /**     * Returns true if the activity's orientation is fixed to landscape.     * @hide     */    boolean isFixedOrientationLandscape() {        return isFixedOrientationLandscape(screenOrientation);    }    /**     * Returns true if the activity's orientation is fixed to landscape.     * @hide     */    public static boolean isFixedOrientationLandscape(@ScreenOrientation int orientation) {        return orientation == SCREEN_ORIENTATION_LANDSCAPE                || orientation == SCREEN_ORIENTATION_SENSOR_LANDSCAPE                || orientation == SCREEN_ORIENTATION_REVERSE_LANDSCAPE                || orientation == SCREEN_ORIENTATION_USER_LANDSCAPE;    }    /**     * Returns true if the activity's orientation is fixed to portrait.     * @hide     */    public static boolean isFixedOrientationPortrait(@ScreenOrientation int orientation) {        return orientation == SCREEN_ORIENTATION_PORTRAIT                || orientation == SCREEN_ORIENTATION_SENSOR_PORTRAIT                || orientation == SCREEN_ORIENTATION_REVERSE_PORTRAIT                || orientation == SCREEN_ORIENTATION_USER_PORTRAIT;    }

发现是检查Activity方式是否是固定的

继续分析

  /**     * Determines whether the {@link Activity} is considered translucent or floating.     * @hide     */    public static boolean isTranslucentOrFloating(TypedArray attributes) {        final boolean isTranslucent =                attributes.getBoolean(com.android.internal.R.styleable.Window_windowIsTranslucent,                        false);        final boolean isSwipeToDismiss = !attributes.hasValue(                com.android.internal.R.styleable.Window_windowIsTranslucent)                && attributes.getBoolean(                        com.android.internal.R.styleable.Window_windowSwipeToDismiss, false);        final boolean isFloating =                attributes.getBoolean(com.android.internal.R.styleable.Window_windowIsFloating,                        false);        return isFloating || isTranslucent || isSwipeToDismiss;    }

发现是检查Activity方式是否是透明或者是浮动的

如果是Activity方向固定并且是透明(或者浮动)，则会抛异常。

修复方法：
1、Activity 注册声明中去除android:screenOrientation属性或者修改为 android:screenOrientation=“behind”。
2、针对API为26时，设置背景为不透明或者不固定。

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