How to Globally Force Screen Orientation in Android

How can I globally force screen orientation in Android?

This can be done by creating a hidden system dialog. Its kind of a hack but its crazy enough to work.

    wm = (WindowManager) content.getSystemService(Service.WINDOW_SERVICE);

    orientationChanger = new LinearLayout(content);
    orientationChanger.setClickable(false);
    orientationChanger.setFocusable(false);
    orientationChanger.setFocusableInTouchMode(false);
    orientationChanger.setLongClickable(false);

    orientationLayout = new WindowManager.LayoutParams(
            LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT,
            windowType, WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
                    | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
            PixelFormat.RGBA_8888);

    wm.addView(orientationChanger, orientationLayout);
    orientationChanger.setVisibility(View.GONE);

    orientationLayout.screenOrientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
    wm.updateViewLayout(orientationChanger, orientationLayout);
    orientationChanger.setVisibility(View.VISIBLE);

How to globally lock screen orientation in Android?

I found the answer in the source code for this project. http://code.google.com/p/perapp It can be done by reading system logs and creating system level dialogs that are allowed to show on top of everything else. You can create them hidden and have them force the screen into landscape.

Force portrait orientation mode

Don't apply the orientation to the application element, instead you should apply the attribute to the activity element, and you must also set configChanges as noted below.

Example:

<activity
   android:screenOrientation="portrait"
   android:configChanges="orientation|keyboardHidden">
</activity>

This is applied in the manifest file AndroidManifest.xml.

I want my android application to be only run in portrait mode?

In the manifest, set this for all your activities:

<activity android:name=".YourActivity"
    android:configChanges="orientation"
    android:screenOrientation="portrait"/>

Let me explain:

With android:configChanges="orientation" you tell Android that you will be responsible of the changes of orientation.
android:screenOrientation="portrait" you set the default orientation mode.

How to apply screen orientation to portrait too all the layouts at once android studio

You can set it in your activity Manifest XML. screenOrientation.

<activity
            android:name=".Android_mobile_infoActivity"
            android:label="@string/app_name"
            android:screenOrientation="portrait" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
  </activity>

How can I disable landscape mode in Android?

Add android:screenOrientation="portrait" to the activity in the AndroidManifest.xml. For example:

<activity android:name=".SomeActivity"
          android:label="@string/app_name"
          android:screenOrientation="portrait" />

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.

The major caveats with forced portrait:

This does not absolve you of having to think about activity
lifecycle events or properly saving/restoring state. There are plenty of
things besides app rotation that can trigger an activity
destruction/recreation, including unavoidable things like multitasking. There are no shortcuts; learn to use bundles and retainInstance fragments.
Keep in mind that unlike the fairly uniform iPhone experience, there are some devices where portrait is not the clearly popular orientation. 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. 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. 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."

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. 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:

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. 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 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.

How to set orientation to intent.putExtra?

You must globaly change the orientation before opening contact app.
see this topic: How can I globally force screen orientation in Android?

android force lauch activity in landscape mode

Try overriding the onConfigurationChanged method.

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
    }