Android兼容性优化-Android(安卓)8.0设置Activity透明主题崩溃

原文连接：https://mp.weixin.qq.com/s/g6...

崩溃日志：

1 java.lang.RuntimeException:Unable to start activity ComponentInfo{com.pxwx.assistant/com.pxwx.main.ui.MainActivity}: java.lang.IllegalStateException: Only fullscreen opaque activities can request orientation2 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2957)3 ......4 Caused by:5 java.lang.IllegalStateException:Only fullscreen opaque activities can request orientation6 android.app.Activity.onCreate(Activity.java:1038)7 androidx.core.app.ComponentActivity.onCreate(Unknown Source:0)8 androidx.activity.ComponentActivity.onCreate(Unknown Source:0)9 androidx.fragment.app.FragmentActivity.onCreate(Unknown Source:99)10 androidx.appcompat.app.AppCompatActivity.onCreate(Unknown Source:10)11 com.pxwx.base.activity.BaseActivity.onCreate(Unknown Source:0)12 com.pxwx.main.ui.MainActivity.onCreate(Native Method)13 android.app.Activity.performCreate(Activity.java:7183)14 android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1221)15 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2910)16 android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3032)17 android.app.ActivityThread.-wrap11(Unknown Source:0)18 android.app.ActivityThread$H.handleMessage(ActivityThread.java:1696)19 android.os.Handler.dispatchMessage(Handler.java:105)20 android.os.Looper.loop(Looper.java:164)21 android.app.ActivityThread.main(ActivityThread.java:6942)22 java.lang.reflect.Method.invoke(Native Method)23 com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)24 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)

抛出异常信息：

Only fullscreen opaque activities can request orientation

Android8.0源码Activity.java:

https://www.androidos.net.cn/...

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();            //如果Activity方向固定并且是透明(或者浮动)，则会抛异常。            if (isTranslucentOrFloating) {                throw new IllegalStateException(                        "Only fullscreen opaque activities can request orientation");            }        }        ...    }

查看ActivityInfo.java的isTranslucentOrFloating()方法：
https://www.androidos.net.cn/...

//检查Activity方式是否是透明或者是浮动的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;    }

解决方法:

1、降级targetSDKVersion到26以下(废话！！)
2、移除mainfest文件里的screenOrientation属性

3、取消Activity主题里的windowIsTranslucent属性或者windowSwipeToDismiss属性或者windowIsFloating属性（根据你设置了什么属性来具体分析）

==4、移除manifest文件里的screenOrientation属性，并在Activity的onCreate方法里设置屏幕方向==

if (Build.VERSION.SDK_INT != Build.VERSION_CODES.O) {    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);}

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崩溃日志：

Android8.0源码Activity.java:

解决方法:

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