• Back traces starts.
• java.lang.RuntimeException: Unable to start activity ComponentInfo{com.vlion.xuehua/com.vlion.xuehua.activity.SplashActivity}: java.lang.IllegalStateException: Only fullscreen opaque activities can request orientation
• at 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 orientation
• at android.app.Activity.onCreate(Activity.java:1081)
• at androidx.core.app.ComponentActivity.onCreate(ComponentActivity.java:85)
• at androidx.activity.ComponentActivity.onCreate(ComponentActivity.java:154)
• at androidx.fragment.app.FragmentActivity.onCreate(FragmentActivity.java:312)
• at androidx.appcompat.app.AppCompatActivity.onCreate(AppCompatActivity.java:115)
• at com.vlion.xuehua.activity.BaseActivity.onCreate(BaseActivity.java:76)
• at com.vlion.xuehua.activity.SplashActivity.onCreate(Native Method)
• 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 more
• Back traces ends.

这个问题是Android 版本的适配问题；

android 8.0 (API=26) 适配遇到的两个问题

解决方法：有两种，根据需求选择其一，或者两个一起用也行

（横屏方向问题）

（1）去掉android:screenOrientation；

（主题 样式）
（2）android:windowIsTranslucent 改为false; 如果需要透明的设置加上android:windowDisablePreview =true；

在项目res目录下创建values-v26/styles.xml；