CODEWITHSUNDEEP
androidlandscapeandroid-orientation
hap497
hap497

Reputation: 163355

Force an Android activity to always use landscape mode

I am using the Android VNC viewer on my HTC G1. But for some reason, that application is always in landscape mode despite my G1 is in portrait mode. Since the Android VNC viewer is open source, I would like know how is it possible hard code an activity to be 'landscape'. I would like to change it to respect the phone orientation.

Upvotes: 163

Views: 338369

Answers (16)

Chetan
Chetan

Reputation: 345

Add The Following Lines in Activity

You need to enter in every Activity

for landscape

android:screenOrientation="landscape"
tools:ignore="LockedOrientationActivity"

for portrait

android:screenOrientation="portrait"
tools:ignore="LockedOrientationActivity"

Here The Example of MainActivity

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="org.thcb.app">
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <activity android:name=".MainActivity"
            android:screenOrientation="landscape"
            tools:ignore="LockedOrientationActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <activity android:name=".MainActivity2"
            android:screenOrientation="portrait"
            tools:ignore="LockedOrientationActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

Upvotes: 2

Vibhu Vikram Singh
Vibhu Vikram Singh

Reputation: 139

use Only
android:screenOrientation="portrait" tools:ignore="LockedOrientationActivity"

Upvotes: 0

avisper
avisper

Reputation: 908

In the manifest:

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

In your activity:

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
setContentView(R.layout.your_activity_layout);

Upvotes: 29

Yamikani Sita
Yamikani Sita

Reputation: 51

Use the ActivityInfo (android.content.pm.ActivityInfo) in your onCreate method before calling setLayout method like this

this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

Upvotes: 0

ComeIn
ComeIn

Reputation: 1609

This works for Xamarin.Android. In OnCreate()

RequestedOrientation = Android.Content.PM.ScreenOrientation.Landscape;

Upvotes: 5

Peterdk
Peterdk

Reputation: 16025

For Android 4.0 (Ice Cream Sandwich) and later, I needed to add these, besides the landscape value.

android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"

Using only keyboardHidden|orientation would still result in memory leaks and recreation of my activities when pressing the power button.

Upvotes: 0

anwarma
anwarma

Reputation: 2105

In my OnCreate(Bundle), I generally do the following:

this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

Upvotes: 44

Megha
Megha

Reputation: 1581

The following is the code which I used to display all activity in landscape mode:

<activity android:screenOrientation="landscape"
          android:configChanges="orientation|keyboardHidden"
          android:name="abcActivty"/>

Upvotes: 11

joshgoldeneagle
joshgoldeneagle

Reputation: 4646

A quick and simple solution is for the AndroidManifest.xml file, add the following for each activity that you wish to force to landscape mode:

android:screenOrientation="landscape"

Upvotes: 9

RichieHH
RichieHH

Reputation: 2123

Doing it in code is is IMO wrong and even more so if you put it into the onCreate. Do it in the manifest and the "system" knows the orientation from the startup of the app. And this type of meta or top level "guidance" SHOULD be in the manifest. If you want to prove it to yourself set a break in the Activity's onCreate. If you do it in code there it will be called twice : it starts up in Portrait mode then is switched to Landscape. This does not happen if you do it in the manifest.

Upvotes: 1

Yann Pascal DEUNGOUE DJOMENI
Yann Pascal DEUNGOUE DJOMENI

Reputation: 1

Press CTRL+F11 to rotate the screen.

Upvotes: -27

AndrewDC
AndrewDC

Reputation: 51

That's it!! Long waiting for this fix.

I've an old Android issue about double-start an activity that required (programmatically) landscape mode: setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE)

Now Android make Landscape mode on start.

Upvotes: 4

Blue Moon
Blue Moon

Reputation: 39

Arslan, why do you want to force orientation pro grammatically, though there's already a way in manifest <activity android:name=".youractivityName" android:screenOrientation="portrait" />

Upvotes: 3

Pulkit Sethi
Pulkit Sethi

Reputation: 2311

Looking at the AndroidManifest.xml (link), on line 9:

<activity android:screenOrientation="landscape" android:configChanges="orientation|keyboardHidden" android:name="VncCanvasActivity">

This line specifies the screenOrientation as landscape, but author goes further in overriding any screen orientation changes with configChanges="orientation|keyboardHidden". This points to a overridden function in VncCanvasActivity.java.

If you look at VncCanvasActivity, on line 109 is the overrided function:

@Override
public void onConfigurationChanged(Configuration newConfig) {
  // ignore orientation/keyboard change
  super.onConfigurationChanged(newConfig);
}

The author specifically put a comment to ignore any keyboard or orientation changes.

If you want to change this, you can go back to the AndroidManifest.xml file shown above, and change the line to:

<activity android:screenOrientation="sensor" android:name="VncCanvasActivity">

This should change the program to switch from portrait to landscape when the user rotates the device.

This may work, but might mess up how the GUI looks, depending on how the layout were created. You will have to account for that. Also, depending on how the activities are coded, you may notice that when screen orientation is changed, the values that were filled into any input boxes disappear. This also may have to be handled.

Upvotes: 201

haseman
haseman

Reputation: 11313

You can set the same data in your java code as well.

myActivity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

Other values on ActivityInfo will let you set it back to sensor driven or locked portrait. Personally, I like to set it to something in the Manifest as suggested in another answer to this question and then change it later using the above call in the Android SDK if there's a need.

Upvotes: 124

Michael Krauklis
Michael Krauklis

Reputation: 3954

You can specify the orientation of an activity in the manifest. See here.

<activity android:allowTaskReparenting=["true" | "false"]
...
          android:screenOrientation=["unspecified" | "user" | "behind" |
                                     "landscape" | "portrait" |
                                     "sensor" | "nosensor"]
...
                                       "adjustResize", "adjustPan"] >

Upvotes: 33

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