Android Studio第三十九期 - popWindows置顶

/**
* Window type: system window, such as low power alert. These windows
* are always on top of application windows.
* In multiuser systems shows only on the owning user's window.
*/

setWindowLayoutType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);

setWindowLayoutType(WindowManager.LayoutParams.TYPE_SYSTEM_ERROR);

<activity
android:name=".ui.MainActivity"
android:launchMode="singleTask"
android:screenOrientation="landscape"
android:windowSoftInputMode="adjustNothing|stateHidden" />

<activity
android:name=".ui.MainActivity"
android:launchMode="singleTask"
android:screenOrientation="landscape"
android:windowSoftInputMode="adjustPan|stateHidden" />