How can I get the current screen orientation?

问题:

I just want to set some flags when my orientation is in landscape so that when the activity is recreated in onCreate() i can toggle between what to load in portrait vs. landscape. I already have a layout-land xml that is handling my layout.

public void onConfigurationChanged(Configuration _newConfig) {

        if (_newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
            this.loadURLData = false;
        }

        if (_newConfig.orientation == Configuration.ORIENTATION_PORTRAIT) {
            this.loadURLData = true;
        }

        super.onConfigurationChanged(_newConfig);
    }

Over-riding onConfigurationChanged will prevent my layout-land xml from loading in landscape orientation.

I just want to get the current orientation of my device in onCreate(). How can I get this?

回答1:

Activity.getResources().getConfiguration().orientation

回答2:

int orientation = this.getResources().getConfiguration().orientation;
if (orientation == Configuration.ORIENTATION_PORTRAIT) {
    // code for portrait mode
} else {
    // code for landscape mode
}

When the superclass of this is Context

回答3:

In some devices void onConfigurationChanged() may crash. User will use this code to get current screen orientation.

public int getScreenOrientation()
{
    Display getOrient = getActivity().getWindowManager().getDefaultDisplay();
    int orientation = Configuration.ORIENTATION_UNDEFINED;
    if(getOrient.getWidth()==getOrient.getHeight()){
        orientation = Configuration.ORIENTATION_SQUARE;
    } else{ 
        if(getOrient.getWidth() < getOrient.getHeight()){
            orientation = Configuration.ORIENTATION_PORTRAIT;
        }else { 
             orientation = Configuration.ORIENTATION_LANDSCAPE;
        }
    }
    return orientation;
}

And use

if (orientation==1)        // 1 for Configuration.ORIENTATION_PORTRAIT
{                          // 2 for Configuration.ORIENTATION_LANDSCAPE
   //your code             // 0 for Configuration.ORIENTATION_SQUARE
}

回答4:

int rotation =  getWindowManager().getDefaultDisplay().getRotation();

this will gives all orientation like normal and reverse

and handle it like

int angle = 0;
switch (rotation) {
    case Surface.ROTATION_90:
        angle = -90;
        break;
    case Surface.ROTATION_180:
        angle = 180;
        break;
    case Surface.ROTATION_270:
        angle = 90;
        break;
    default:
        angle = 0;
        break;
}

回答5:

getActivity().getResources().getConfiguration().orientation

this command returns int value 1 for Portrait and 2 for Landscape

回答6:

In case anyone would like to obtain meaningful orientation description (like that passed to onConfigurationChanged(..) with those reverseLandscape, sensorLandscape and so on), simply use getRequestedOrientation()

回答7:

In your activity class use the method below :

 @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);

        // Checks the orientation of the screen
        if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {

            setlogo();// Your Method
            Log.d("Daiya", "ORIENTATION_LANDSCAPE");

        } else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT) {

            setlogoForLandScape();// Your Method
            Log.d("Daiya", "ORIENTATION_PORTRAIT");
        }
    }

Then to declare that your activity handles a configuration change, edit the appropriate element in your manifest file to include the android:configChanges attribute with a value that represents the configuration you want to handle. Possible values are listed in the documentation for the android:configChanges attribute (the most commonly used values are "orientation" to prevent restarts when the screen orientation changes and "keyboardHidden" to prevent restarts when the keyboard availability changes). You can declare multiple configuration values in the attribute by separating them with a pipe | character.

<activity android:name=".MyActivity"
          android:configChanges="orientation|keyboardHidden"
          android:label="@string/app_name">

That's all!!

回答8:

if you want to override that onConfigurationChanged method and still want it to do the basic stuff then consider using super.onConfigyrationChanged() as the first statement in the overriden method.

回答9:

I just want to propose another alternative that will concern some of you :

android:configChanges="orientation|keyboardHidden" 

implies that we explicitly declare the layout to be injected.

In case we want to keep the automatic injection thanks to the layout-land and layout folders. All you have to do is add it to the onCreate:

    if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
        getSupportActionBar().hide();

    } else if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
        getSupportActionBar().show();
    }

Here, we display or not the actionbar depending on the orientation of the phone