![]() ![]() Oil Well Derrick Stability: Guywire Anchor Systems Legionnaire's Disease, see OSHA's Safety and Health Topics Page for updated information.Ĭontrolling Exposure to Hazardous Drugs, see OSHA's Safety and Health Topics Page for updated information. Polymer Matrix Materials: Advanced Composites class MyApp extends Application void onCreate() else if (orientation = Configuration.Technical Equipment: On-site Measurements At this point you can call setRequestedOrientation() on the newly created activity.Īnd do not forget to add app:name=".MyApp" in your manifest file. This gives you the opportunity to execute your own code whenever any activity in your app is started (or stopped, or resumed, or whatever). In its onCreate(), called when your app first starts up, you register an ActivityLifecycleCallbacks object (API level 14+) to receive notifications of activity lifecycle events. The trick is first to make sure you include an Application subclass in your project. You can do this for your entire application without having to make all your activities extend a common base class. If you still need to force portrait for some reason, sensorPortrait may be better than portrait for Android 2.3 (Gingerbread) and later this allows for upside-down portrait, which is quite common in tablet usage. ![]() This forces landscape on most tablets and portrait on most phones, but I still wouldn't recommend this for most "normal" apps (some users just like to type in the landscape softkeyboard on their phones, and many tablet users read in portrait - and you should let them). If your main concern is accidental orientation changes mid-activity that you think the device's sensors and software won't cope with well (for example, in a tilt-based game) consider supporting landscape and portrait, but using nosensor for the orientation.A few cases you may still want to think about, though, if you're not happy with the default behavior of sensor orientation in your use case: So most apps should just let the phone sensors, software, and physical configuration make their own decision about how the user wants to interact with your app. I'm talking about things like "this is a cash register app for one specific model of tablet always used in a fixed hardware dock." If your app doesn't have a strong UX argument that would lead to a negative experience for supporting other orientations, you should probably not force landscape. When users are on devices with hardware keyboards or game pads a la the Nvidia Shield, on Chromebooks, on foldables, or on Samsung DeX, forcing portrait can make your app experience either limiting or a giant usability hassle. Keep in mind that unlike the fairly uniform iPhone experience, there are some devices where portrait is not the clearly popular orientation.There are no shortcuts learn to use bundles and retainInstance fragments. Things besides app rotation that can trigger an activityĭestruction/recreation, including unavoidable things like multitasking. Lifecycle events or properly saving/restoring state. This does not absolve you of having to think about activity.Since this has become a super-popular answer, I feel very guilty as forcing portrait is rarely the right solution to the problems it's frequently applied to. Add android:screenOrientation="portrait" to the activity in the AndroidManifest.xml. ![]()
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