java.lang.IllegalStateException: Only fullscreen opaque activities can request orientation

Question

I am facing the problem while retrieving the contacts from the contact book in Android 8.0 Oreo java.lang.IllegalStateException: Only fullscreen opaque activities can reques

Answer 1

Many people have given a fix, so I'll talk about the source of the problem.

According to the exception log：

Caused by: java.lang.IllegalStateException: Only fullscreen opaque activities can request orientation
    at android.app.Activity.onCreate(Activity.java:1081)
    at android.support.v4.app.SupportActivity.onCreate(SupportActivity.java:66)
    at android.support.v4.app.FragmentActivity.onCreate(FragmentActivity.java:297)
    at android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:84)
    at com.nut.blehunter.ui.DialogContainerActivity.onCreate(DialogContainerActivity.java:43)
    at android.app.Activity.performCreate(Activity.java:7372)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1218)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3147)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3302) 
    at android.app.ActivityThread.-wrap12(Unknown Source:0) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1891) 
    at android.os.Handler.dispatchMessage(Handler.java:108) 
    at android.os.Looper.loop(Looper.java:166)

The code that triggered the exception in Activity.java

    //Need to pay attention mActivityInfo.isFixedOrientation() and ActivityInfo.isTranslucentOrFloating(ta)
    if (getApplicationInfo().targetSdkVersion >= O_MR1 && mActivityInfo.isFixedOrientation()) {
        final TypedArray ta = obtainStyledAttributes(com.android.internal.R.styleable.Window);
        final boolean isTranslucentOrFloating = ActivityInfo.isTranslucentOrFloating(ta);
        ta.recycle();

        //Exception occurred
        if (isTranslucentOrFloating) {
            throw new IllegalStateException(
                    "Only fullscreen opaque activities can request orientation");
        }
    }

mActivityInfo.isFixedOrientation()：

        /**
        * 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 portrait.
        * @hide
        */
        boolean isFixedOrientationPortrait() {
            return isFixedOrientationPortrait(screenOrientation);
        }

        /**
        * 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;
        }

        /**
        * 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;
        }

According to the above code analysis, when TargetSdkVersion>=27, when using SCREEN_ORIENTATION_LANDSCAPE, SCREEN_ORIENTATION_PORTRAIT, and other related attributes, the use of windowIsTranslucent, windowIsFloating, and windowSwipeToDismiss topic attributes will trigger an exception.

After the problem is found, you can change the TargetSdkVersion or remove the related attributes of the theme according to your needs.